/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/memsafety/20051113-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 16:57:42,641 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 16:57:42,644 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 16:57:42,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 16:57:42,680 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 16:57:42,682 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 16:57:42,684 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 16:57:42,696 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 16:57:42,700 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 16:57:42,701 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 16:57:42,704 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 16:57:42,709 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 16:57:42,710 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 16:57:42,714 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 16:57:42,715 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 16:57:42,718 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 16:57:42,719 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 16:57:42,720 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 16:57:42,727 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 16:57:42,733 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 16:57:42,735 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 16:57:42,738 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 16:57:42,741 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 16:57:42,742 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 16:57:42,747 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 16:57:42,761 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 16:57:42,762 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 16:57:42,763 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 16:57:42,765 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 16:57:42,766 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 16:57:42,767 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 16:57:42,767 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 16:57:42,773 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 16:57:42,773 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 16:57:42,775 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 16:57:42,775 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 16:57:42,779 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-23 16:57:42,804 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 16:57:42,804 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 16:57:42,806 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 16:57:42,806 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 16:57:42,806 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 16:57:42,807 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 16:57:42,807 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-23 16:57:42,807 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 16:57:42,807 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 16:57:42,808 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-23 16:57:42,808 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-23 16:57:42,808 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-23 16:57:42,808 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 16:57:42,809 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-23 16:57:42,809 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 16:57:42,809 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 16:57:42,809 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 16:57:42,810 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 16:57:42,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 16:57:42,810 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 16:57:42,811 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 16:57:42,811 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 16:57:42,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 16:57:42,811 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 16:57:42,812 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 16:57:43,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 16:57:43,244 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 16:57:43,247 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 16:57:43,248 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 16:57:43,249 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 16:57:43,250 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/20051113-1.i [2020-12-23 16:57:43,333 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/415a783da/41fe2f12b66c4c3382b57c4d6ec220a4/FLAG22e7e9c5a [2020-12-23 16:57:44,032 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 16:57:44,033 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/memsafety/20051113-1.i [2020-12-23 16:57:44,056 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/415a783da/41fe2f12b66c4c3382b57c4d6ec220a4/FLAG22e7e9c5a [2020-12-23 16:57:44,260 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/415a783da/41fe2f12b66c4c3382b57c4d6ec220a4 [2020-12-23 16:57:44,265 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 16:57:44,267 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 16:57:44,273 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 16:57:44,274 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 16:57:44,277 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 16:57:44,279 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:57:44" (1/1) ... [2020-12-23 16:57:44,281 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46edda3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:44, skipping insertion in model container [2020-12-23 16:57:44,281 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:57:44" (1/1) ... [2020-12-23 16:57:44,289 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 16:57:44,350 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~p~0,],base],StructAccessExpression[IdentifierExpression[~p~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~p~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[10],StructAccessExpression[IdentifierExpression[~p~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~p~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[40],StructAccessExpression[IdentifierExpression[~p~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~p~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[70],StructAccessExpression[IdentifierExpression[~p~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~p~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[18],StructAccessExpression[IdentifierExpression[~p~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~p~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[48],StructAccessExpression[IdentifierExpression[~p~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~p~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[78],StructAccessExpression[IdentifierExpression[~p~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~p~0,] [2020-12-23 16:57:44,691 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:57:44,705 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~p~0,],base],StructAccessExpression[IdentifierExpression[~p~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~p~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[10],StructAccessExpression[IdentifierExpression[~p~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~p~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[40],StructAccessExpression[IdentifierExpression[~p~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~p~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[70],StructAccessExpression[IdentifierExpression[~p~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~p~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[18],StructAccessExpression[IdentifierExpression[~p~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~p~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[48],StructAccessExpression[IdentifierExpression[~p~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~p~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[78],StructAccessExpression[IdentifierExpression[~p~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~p~0,] [2020-12-23 16:57:44,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:57:44,853 INFO L208 MainTranslator]: Completed translation [2020-12-23 16:57:44,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:44 WrapperNode [2020-12-23 16:57:44,853 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 16:57:44,855 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 16:57:44,855 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 16:57:44,855 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 16:57:44,863 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:44" (1/1) ... [2020-12-23 16:57:44,878 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:44" (1/1) ... [2020-12-23 16:57:44,906 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 16:57:44,907 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 16:57:44,907 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 16:57:44,907 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 16:57:44,920 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:44" (1/1) ... [2020-12-23 16:57:44,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:44" (1/1) ... [2020-12-23 16:57:44,925 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:44" (1/1) ... [2020-12-23 16:57:44,926 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:44" (1/1) ... [2020-12-23 16:57:44,934 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:44" (1/1) ... [2020-12-23 16:57:44,938 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:44" (1/1) ... [2020-12-23 16:57:44,940 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:44" (1/1) ... [2020-12-23 16:57:44,943 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 16:57:44,966 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 16:57:44,966 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 16:57:44,967 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 16:57:44,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:44" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 16:57:45,075 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 16:57:45,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 16:57:45,076 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-23 16:57:45,076 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 16:57:45,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 16:57:45,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 16:57:45,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 16:57:45,551 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 16:57:45,552 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2020-12-23 16:57:45,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:57:45 BoogieIcfgContainer [2020-12-23 16:57:45,554 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 16:57:45,555 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 16:57:45,555 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 16:57:45,559 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 16:57:45,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 04:57:44" (1/3) ... [2020-12-23 16:57:45,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40f917cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:57:45, skipping insertion in model container [2020-12-23 16:57:45,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:57:44" (2/3) ... [2020-12-23 16:57:45,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40f917cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:57:45, skipping insertion in model container [2020-12-23 16:57:45,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:57:45" (3/3) ... [2020-12-23 16:57:45,562 INFO L111 eAbstractionObserver]: Analyzing ICFG 20051113-1.i [2020-12-23 16:57:45,568 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 16:57:45,573 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 25 error locations. [2020-12-23 16:57:45,592 INFO L253 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2020-12-23 16:57:45,616 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 16:57:45,617 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-23 16:57:45,617 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 16:57:45,617 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 16:57:45,617 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 16:57:45,618 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 16:57:45,618 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 16:57:45,618 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 16:57:45,634 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states. [2020-12-23 16:57:45,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-23 16:57:45,641 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:45,641 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-23 16:57:45,642 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:57:45,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:45,648 INFO L82 PathProgramCache]: Analyzing trace with hash 29856, now seen corresponding path program 1 times [2020-12-23 16:57:45,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:45,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712253177] [2020-12-23 16:57:45,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:45,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:45,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:45,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712253177] [2020-12-23 16:57:45,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:57:45,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 16:57:45,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957761462] [2020-12-23 16:57:45,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:57:45,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:45,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:57:45,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:57:45,868 INFO L87 Difference]: Start difference. First operand 60 states. Second operand 3 states. [2020-12-23 16:57:45,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:45,963 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2020-12-23 16:57:45,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:57:45,965 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-23 16:57:45,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:45,973 INFO L225 Difference]: With dead ends: 59 [2020-12-23 16:57:45,974 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 16:57:45,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:57:45,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 16:57:46,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-23 16:57:46,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 16:57:46,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-12-23 16:57:46,015 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 3 [2020-12-23 16:57:46,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:46,016 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-12-23 16:57:46,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:57:46,016 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-12-23 16:57:46,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-23 16:57:46,017 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:46,017 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-23 16:57:46,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 16:57:46,017 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:57:46,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:46,018 INFO L82 PathProgramCache]: Analyzing trace with hash 925572, now seen corresponding path program 1 times [2020-12-23 16:57:46,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:46,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193481813] [2020-12-23 16:57:46,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:46,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:46,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:46,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193481813] [2020-12-23 16:57:46,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:57:46,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 16:57:46,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056569702] [2020-12-23 16:57:46,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:57:46,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:46,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:57:46,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:57:46,122 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 3 states. [2020-12-23 16:57:46,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:46,192 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-12-23 16:57:46,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:57:46,193 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-23 16:57:46,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:46,194 INFO L225 Difference]: With dead ends: 56 [2020-12-23 16:57:46,194 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 16:57:46,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:57:46,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 16:57:46,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-12-23 16:57:46,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 16:57:46,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-12-23 16:57:46,202 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 4 [2020-12-23 16:57:46,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:46,202 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-12-23 16:57:46,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:57:46,203 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-12-23 16:57:46,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 16:57:46,203 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:46,203 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:46,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 16:57:46,204 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:57:46,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:46,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1803953449, now seen corresponding path program 1 times [2020-12-23 16:57:46,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:46,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956869022] [2020-12-23 16:57:46,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:46,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:46,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:46,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956869022] [2020-12-23 16:57:46,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:57:46,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:57:46,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203700328] [2020-12-23 16:57:46,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:57:46,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:46,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:57:46,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:57:46,253 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 4 states. [2020-12-23 16:57:46,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:46,289 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2020-12-23 16:57:46,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:57:46,290 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-23 16:57:46,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:46,291 INFO L225 Difference]: With dead ends: 57 [2020-12-23 16:57:46,292 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 16:57:46,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:57:46,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 16:57:46,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-23 16:57:46,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 16:57:46,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-12-23 16:57:46,309 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 7 [2020-12-23 16:57:46,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:46,310 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-12-23 16:57:46,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:57:46,311 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-12-23 16:57:46,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 16:57:46,314 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:46,315 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:46,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 16:57:46,315 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:57:46,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:46,316 INFO L82 PathProgramCache]: Analyzing trace with hash 87920521, now seen corresponding path program 1 times [2020-12-23 16:57:46,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:46,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111519399] [2020-12-23 16:57:46,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:46,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:46,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:57:46,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111519399] [2020-12-23 16:57:46,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:57:46,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:57:46,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929184951] [2020-12-23 16:57:46,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:57:46,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:46,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:57:46,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:57:46,439 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 5 states. [2020-12-23 16:57:46,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:46,507 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-12-23 16:57:46,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:57:46,508 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-23 16:57:46,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:46,509 INFO L225 Difference]: With dead ends: 50 [2020-12-23 16:57:46,509 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 16:57:46,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:57:46,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 16:57:46,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-23 16:57:46,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 16:57:46,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-12-23 16:57:46,516 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 8 [2020-12-23 16:57:46,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:46,516 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-12-23 16:57:46,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:57:46,517 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-12-23 16:57:46,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 16:57:46,517 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:46,517 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:46,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 16:57:46,518 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:57:46,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:46,519 INFO L82 PathProgramCache]: Analyzing trace with hash 87920522, now seen corresponding path program 1 times [2020-12-23 16:57:46,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:46,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411935466] [2020-12-23 16:57:46,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:46,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:46,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:46,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411935466] [2020-12-23 16:57:46,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672367864] [2020-12-23 16:57:46,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:46,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:46,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 16:57:46,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:46,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:46,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:46,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-23 16:57:46,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610642409] [2020-12-23 16:57:46,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 16:57:46,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:46,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 16:57:46,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-23 16:57:46,831 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 8 states. [2020-12-23 16:57:46,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:46,853 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-12-23 16:57:46,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:57:46,854 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2020-12-23 16:57:46,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:46,855 INFO L225 Difference]: With dead ends: 51 [2020-12-23 16:57:46,855 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 16:57:46,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-23 16:57:46,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 16:57:46,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-23 16:57:46,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 16:57:46,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-12-23 16:57:46,861 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 8 [2020-12-23 16:57:46,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:46,862 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-12-23 16:57:46,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 16:57:46,862 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-12-23 16:57:46,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 16:57:46,863 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:46,863 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:47,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:47,086 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:57:47,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:47,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1569492694, now seen corresponding path program 2 times [2020-12-23 16:57:47,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:47,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156731600] [2020-12-23 16:57:47,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:47,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:47,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:47,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156731600] [2020-12-23 16:57:47,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186197962] [2020-12-23 16:57:47,155 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:47,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 16:57:47,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:47,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 16:57:47,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:47,264 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 16:57:47,265 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:57:47,270 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:57:47,271 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:57:47,272 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-23 16:57:47,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 16:57:47,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 16:57:47,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2020-12-23 16:57:47,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861596592] [2020-12-23 16:57:47,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:57:47,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:47,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:57:47,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:57:47,292 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 3 states. [2020-12-23 16:57:47,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:47,332 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-12-23 16:57:47,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:57:47,333 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-23 16:57:47,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:47,333 INFO L225 Difference]: With dead ends: 44 [2020-12-23 16:57:47,334 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 16:57:47,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:57:47,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 16:57:47,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-12-23 16:57:47,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 16:57:47,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-12-23 16:57:47,339 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 9 [2020-12-23 16:57:47,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:47,339 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-12-23 16:57:47,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:57:47,339 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-12-23 16:57:47,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 16:57:47,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:47,340 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:47,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:47,555 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:57:47,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:47,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1369785802, now seen corresponding path program 1 times [2020-12-23 16:57:47,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:47,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254075876] [2020-12-23 16:57:47,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:47,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:47,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 16:57:47,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254075876] [2020-12-23 16:57:47,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:57:47,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:57:47,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078601957] [2020-12-23 16:57:47,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:57:47,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:47,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:57:47,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:57:47,655 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 4 states. [2020-12-23 16:57:47,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:47,707 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-12-23 16:57:47,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:57:47,708 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-12-23 16:57:47,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:47,709 INFO L225 Difference]: With dead ends: 42 [2020-12-23 16:57:47,709 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 16:57:47,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:57:47,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 16:57:47,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-23 16:57:47,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 16:57:47,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-12-23 16:57:47,713 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 17 [2020-12-23 16:57:47,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:47,714 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-12-23 16:57:47,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:57:47,714 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-12-23 16:57:47,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 16:57:47,714 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:47,715 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:47,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 16:57:47,715 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:57:47,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:47,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1369785801, now seen corresponding path program 1 times [2020-12-23 16:57:47,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:47,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783344699] [2020-12-23 16:57:47,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:47,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:47,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:47,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783344699] [2020-12-23 16:57:47,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672750630] [2020-12-23 16:57:47,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:47,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:47,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 16:57:47,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:47,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:47,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:47,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-23 16:57:47,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112005586] [2020-12-23 16:57:47,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 16:57:47,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:47,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 16:57:47,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-12-23 16:57:47,901 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 10 states. [2020-12-23 16:57:47,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:47,921 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-12-23 16:57:47,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 16:57:47,921 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-12-23 16:57:47,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:47,922 INFO L225 Difference]: With dead ends: 43 [2020-12-23 16:57:47,922 INFO L226 Difference]: Without dead ends: 43 [2020-12-23 16:57:47,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-12-23 16:57:47,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-23 16:57:47,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-12-23 16:57:47,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 16:57:47,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-12-23 16:57:47,927 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 17 [2020-12-23 16:57:47,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:47,927 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-12-23 16:57:47,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 16:57:47,927 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-12-23 16:57:47,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 16:57:47,928 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:47,928 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:48,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:48,143 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:57:48,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:48,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1461234839, now seen corresponding path program 2 times [2020-12-23 16:57:48,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:48,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905499275] [2020-12-23 16:57:48,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:48,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:48,250 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 16:57:48,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905499275] [2020-12-23 16:57:48,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957659373] [2020-12-23 16:57:48,251 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 16:57:48,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 16:57:48,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:48,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 16:57:48,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:48,342 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 16:57:48,343 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:57:48,347 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:57:48,348 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:57:48,348 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-23 16:57:48,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:57:48,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 16:57:48,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2020-12-23 16:57:48,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941321700] [2020-12-23 16:57:48,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:57:48,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:48,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:57:48,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-12-23 16:57:48,401 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 5 states. [2020-12-23 16:57:48,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:48,450 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-12-23 16:57:48,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:57:48,451 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-12-23 16:57:48,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:48,452 INFO L225 Difference]: With dead ends: 42 [2020-12-23 16:57:48,452 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 16:57:48,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-12-23 16:57:48,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 16:57:48,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-23 16:57:48,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 16:57:48,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-12-23 16:57:48,456 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 18 [2020-12-23 16:57:48,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:48,456 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-12-23 16:57:48,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:57:48,456 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-12-23 16:57:48,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 16:57:48,457 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:48,457 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:48,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:48,671 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:57:48,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:48,673 INFO L82 PathProgramCache]: Analyzing trace with hash -207625928, now seen corresponding path program 1 times [2020-12-23 16:57:48,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:48,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651999706] [2020-12-23 16:57:48,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:48,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:48,744 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 16:57:48,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651999706] [2020-12-23 16:57:48,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655340903] [2020-12-23 16:57:48,745 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:48,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:48,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 16:57:48,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:48,900 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 16:57:48,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:48,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-12-23 16:57:48,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919428258] [2020-12-23 16:57:48,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 16:57:48,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:48,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 16:57:48,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2020-12-23 16:57:48,902 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 12 states. [2020-12-23 16:57:48,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:48,931 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-12-23 16:57:48,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 16:57:48,931 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-12-23 16:57:48,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:48,932 INFO L225 Difference]: With dead ends: 43 [2020-12-23 16:57:48,932 INFO L226 Difference]: Without dead ends: 43 [2020-12-23 16:57:48,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2020-12-23 16:57:48,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-23 16:57:48,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-12-23 16:57:48,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 16:57:48,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-12-23 16:57:48,936 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 20 [2020-12-23 16:57:48,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:48,936 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-12-23 16:57:48,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 16:57:48,937 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-12-23 16:57:48,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 16:57:48,937 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:48,938 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:49,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 16:57:49,153 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:57:49,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:49,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1544531240, now seen corresponding path program 2 times [2020-12-23 16:57:49,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:49,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375096814] [2020-12-23 16:57:49,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:49,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:49,235 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:49,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375096814] [2020-12-23 16:57:49,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400097657] [2020-12-23 16:57:49,235 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:49,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 16:57:49,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:49,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 16:57:49,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:49,328 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 16:57:49,329 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:57:49,334 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:57:49,335 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:57:49,335 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-23 16:57:49,395 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 16:57:49,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 16:57:49,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2020-12-23 16:57:49,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266503894] [2020-12-23 16:57:49,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:57:49,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:49,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:57:49,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-23 16:57:49,398 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 5 states. [2020-12-23 16:57:49,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:49,499 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2020-12-23 16:57:49,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 16:57:49,499 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-12-23 16:57:49,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:49,500 INFO L225 Difference]: With dead ends: 67 [2020-12-23 16:57:49,500 INFO L226 Difference]: Without dead ends: 67 [2020-12-23 16:57:49,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-12-23 16:57:49,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-23 16:57:49,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 46. [2020-12-23 16:57:49,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 16:57:49,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-12-23 16:57:49,505 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 21 [2020-12-23 16:57:49,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:49,505 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-12-23 16:57:49,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:57:49,506 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-12-23 16:57:49,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 16:57:49,506 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:49,507 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:49,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:49,720 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:57:49,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:49,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1200625556, now seen corresponding path program 1 times [2020-12-23 16:57:49,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:49,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485757526] [2020-12-23 16:57:49,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:49,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:49,816 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 16:57:49,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485757526] [2020-12-23 16:57:49,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:57:49,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:57:49,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315427261] [2020-12-23 16:57:49,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:57:49,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:49,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:57:49,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:57:49,818 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 4 states. [2020-12-23 16:57:49,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:49,865 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-12-23 16:57:49,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:57:49,868 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-12-23 16:57:49,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:49,870 INFO L225 Difference]: With dead ends: 44 [2020-12-23 16:57:49,870 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 16:57:49,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:57:49,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 16:57:49,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-12-23 16:57:49,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 16:57:49,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-12-23 16:57:49,875 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 25 [2020-12-23 16:57:49,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:49,875 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-12-23 16:57:49,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:57:49,876 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-12-23 16:57:49,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 16:57:49,877 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:49,877 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:49,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-23 16:57:49,877 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:57:49,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:49,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1200625555, now seen corresponding path program 1 times [2020-12-23 16:57:49,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:49,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48163035] [2020-12-23 16:57:49,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:49,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:50,015 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:50,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48163035] [2020-12-23 16:57:50,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767660104] [2020-12-23 16:57:50,016 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:50,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:50,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 16:57:50,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:50,192 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:50,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:50,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-12-23 16:57:50,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371453388] [2020-12-23 16:57:50,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 16:57:50,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:50,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 16:57:50,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2020-12-23 16:57:50,194 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 14 states. [2020-12-23 16:57:50,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:50,217 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-12-23 16:57:50,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 16:57:50,218 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 25 [2020-12-23 16:57:50,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:50,218 INFO L225 Difference]: With dead ends: 45 [2020-12-23 16:57:50,218 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 16:57:50,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2020-12-23 16:57:50,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 16:57:50,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-23 16:57:50,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 16:57:50,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2020-12-23 16:57:50,222 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 25 [2020-12-23 16:57:50,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:50,222 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2020-12-23 16:57:50,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 16:57:50,223 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2020-12-23 16:57:50,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 16:57:50,223 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:50,224 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:50,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:50,439 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:57:50,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:50,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1631225139, now seen corresponding path program 2 times [2020-12-23 16:57:50,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:50,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123598868] [2020-12-23 16:57:50,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:50,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:50,548 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:57:50,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123598868] [2020-12-23 16:57:50,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048749772] [2020-12-23 16:57:50,549 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:50,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 16:57:50,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:50,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 16:57:50,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:50,623 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 16:57:50,624 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:57:50,629 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:57:50,630 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:57:50,630 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-23 16:57:50,691 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 16:57:50,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 16:57:50,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 12 [2020-12-23 16:57:50,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569604828] [2020-12-23 16:57:50,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:57:50,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:50,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:57:50,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-12-23 16:57:50,693 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 5 states. [2020-12-23 16:57:50,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:50,748 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-12-23 16:57:50,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:57:50,748 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-12-23 16:57:50,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:50,749 INFO L225 Difference]: With dead ends: 44 [2020-12-23 16:57:50,749 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 16:57:50,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-12-23 16:57:50,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 16:57:50,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-12-23 16:57:50,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 16:57:50,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-12-23 16:57:50,752 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 26 [2020-12-23 16:57:50,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:50,753 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-12-23 16:57:50,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:57:50,753 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-12-23 16:57:50,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 16:57:50,754 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:50,754 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:50,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 16:57:50,968 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:57:50,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:50,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1813766413, now seen corresponding path program 1 times [2020-12-23 16:57:50,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:50,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094936267] [2020-12-23 16:57:50,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:51,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:51,090 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 16:57:51,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094936267] [2020-12-23 16:57:51,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456236823] [2020-12-23 16:57:51,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:51,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 16:57:51,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:51,286 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 16:57:51,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:51,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-23 16:57:51,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567914647] [2020-12-23 16:57:51,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 16:57:51,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:51,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 16:57:51,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2020-12-23 16:57:51,289 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 16 states. [2020-12-23 16:57:51,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:51,318 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-12-23 16:57:51,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 16:57:51,319 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2020-12-23 16:57:51,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:51,319 INFO L225 Difference]: With dead ends: 45 [2020-12-23 16:57:51,319 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 16:57:51,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2020-12-23 16:57:51,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 16:57:51,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-23 16:57:51,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 16:57:51,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2020-12-23 16:57:51,323 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 27 [2020-12-23 16:57:51,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:51,323 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2020-12-23 16:57:51,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 16:57:51,323 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2020-12-23 16:57:51,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 16:57:51,324 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:51,324 INFO L422 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:51,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 16:57:51,539 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:57:51,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:51,540 INFO L82 PathProgramCache]: Analyzing trace with hash 991861075, now seen corresponding path program 2 times [2020-12-23 16:57:51,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:51,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472172947] [2020-12-23 16:57:51,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:51,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:51,685 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 16:57:51,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472172947] [2020-12-23 16:57:51,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016142425] [2020-12-23 16:57:51,686 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:51,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:57:51,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:51,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 16:57:51,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:51,984 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 16:57:51,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:51,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-12-23 16:57:51,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919973429] [2020-12-23 16:57:51,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 16:57:51,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:51,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 16:57:51,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2020-12-23 16:57:51,992 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 18 states. [2020-12-23 16:57:52,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:52,024 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2020-12-23 16:57:52,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 16:57:52,025 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 28 [2020-12-23 16:57:52,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:52,028 INFO L225 Difference]: With dead ends: 46 [2020-12-23 16:57:52,028 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 16:57:52,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2020-12-23 16:57:52,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 16:57:52,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-23 16:57:52,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 16:57:52,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-12-23 16:57:52,036 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 28 [2020-12-23 16:57:52,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:52,037 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-12-23 16:57:52,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 16:57:52,037 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-12-23 16:57:52,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 16:57:52,040 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:52,040 INFO L422 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:52,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 16:57:52,255 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:57:52,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:52,256 INFO L82 PathProgramCache]: Analyzing trace with hash 2066967283, now seen corresponding path program 3 times [2020-12-23 16:57:52,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:52,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470332306] [2020-12-23 16:57:52,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:52,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:52,417 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 16:57:52,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470332306] [2020-12-23 16:57:52,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172681921] [2020-12-23 16:57:52,418 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:52,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 16:57:52,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:52,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 16:57:52,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:52,525 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 16:57:52,525 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:57:52,530 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:57:52,531 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:57:52,531 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-23 16:57:52,564 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-23 16:57:52,565 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:57:52,574 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:57:52,574 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:57:52,574 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2020-12-23 16:57:52,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,604 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:57:52,607 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:57:52,616 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:57:52,617 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:57:52,617 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:25 [2020-12-23 16:57:52,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,650 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2020-12-23 16:57:52,652 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:57:52,663 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:57:52,663 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:57:52,664 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2020-12-23 16:57:52,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,709 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2020-12-23 16:57:52,713 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:57:52,725 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:57:52,726 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:57:52,726 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:43 [2020-12-23 16:57:52,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,773 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 56 [2020-12-23 16:57:52,777 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:57:52,792 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:57:52,793 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:57:52,793 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:52 [2020-12-23 16:57:52,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,850 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 68 [2020-12-23 16:57:52,853 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:57:52,870 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:57:52,871 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:57:52,871 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:61 [2020-12-23 16:57:52,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:52,948 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 80 [2020-12-23 16:57:52,953 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:57:52,973 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:57:52,974 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:57:52,974 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:74, output treesize:70 [2020-12-23 16:57:53,124 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 25 [2020-12-23 16:57:53,128 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:57:53,136 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:57:53,137 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:57:53,137 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:15 [2020-12-23 16:57:53,192 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-23 16:57:53,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:53,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 23 [2020-12-23 16:57:53,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473383705] [2020-12-23 16:57:53,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 16:57:53,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:53,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 16:57:53,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2020-12-23 16:57:53,212 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 23 states. [2020-12-23 16:57:54,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:54,485 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2020-12-23 16:57:54,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 16:57:54,485 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 29 [2020-12-23 16:57:54,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:54,486 INFO L225 Difference]: With dead ends: 64 [2020-12-23 16:57:54,487 INFO L226 Difference]: Without dead ends: 64 [2020-12-23 16:57:54,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=407, Invalid=1573, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 16:57:54,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-23 16:57:54,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 43. [2020-12-23 16:57:54,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 16:57:54,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-12-23 16:57:54,500 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 29 [2020-12-23 16:57:54,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:54,501 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-12-23 16:57:54,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 16:57:54,501 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-12-23 16:57:54,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 16:57:54,502 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:54,502 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:54,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 16:57:54,719 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:57:54,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:54,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1810687122, now seen corresponding path program 1 times [2020-12-23 16:57:54,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:54,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306983050] [2020-12-23 16:57:54,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:54,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:54,792 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 16:57:54,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306983050] [2020-12-23 16:57:54,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:57:54,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:57:54,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273272889] [2020-12-23 16:57:54,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:57:54,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:54,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:57:54,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:57:54,795 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 4 states. [2020-12-23 16:57:54,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:54,857 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2020-12-23 16:57:54,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:57:54,859 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-12-23 16:57:54,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:54,859 INFO L225 Difference]: With dead ends: 54 [2020-12-23 16:57:54,860 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 16:57:54,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:57:54,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 16:57:54,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-12-23 16:57:54,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 16:57:54,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-12-23 16:57:54,863 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 31 [2020-12-23 16:57:54,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:54,863 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-12-23 16:57:54,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:57:54,863 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-12-23 16:57:54,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 16:57:54,864 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:54,864 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:54,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-23 16:57:54,864 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:57:54,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:54,865 INFO L82 PathProgramCache]: Analyzing trace with hash -767621697, now seen corresponding path program 1 times [2020-12-23 16:57:54,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:54,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993980665] [2020-12-23 16:57:54,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:54,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:54,947 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 16:57:54,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993980665] [2020-12-23 16:57:54,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:57:54,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 16:57:54,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580621920] [2020-12-23 16:57:54,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:57:54,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:54,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:57:54,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:57:54,949 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 5 states. [2020-12-23 16:57:55,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:55,019 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-12-23 16:57:55,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:57:55,020 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-12-23 16:57:55,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:55,021 INFO L225 Difference]: With dead ends: 48 [2020-12-23 16:57:55,021 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 16:57:55,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 6 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:57:55,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 16:57:55,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-12-23 16:57:55,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 16:57:55,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-12-23 16:57:55,023 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 35 [2020-12-23 16:57:55,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:55,023 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-12-23 16:57:55,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:57:55,024 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-12-23 16:57:55,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 16:57:55,024 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:55,025 INFO L422 BasicCegarLoop]: trace histogram [8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:55,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-23 16:57:55,025 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:57:55,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:55,025 INFO L82 PathProgramCache]: Analyzing trace with hash -811863332, now seen corresponding path program 1 times [2020-12-23 16:57:55,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:55,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640315792] [2020-12-23 16:57:55,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:55,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:55,165 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 16:57:55,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640315792] [2020-12-23 16:57:55,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950972176] [2020-12-23 16:57:55,166 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:55,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:55,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 16:57:55,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:55,473 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 16:57:55,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:55,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2020-12-23 16:57:55,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73414547] [2020-12-23 16:57:55,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 16:57:55,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:55,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 16:57:55,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2020-12-23 16:57:55,475 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 22 states. [2020-12-23 16:57:55,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:55,514 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2020-12-23 16:57:55,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 16:57:55,514 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 36 [2020-12-23 16:57:55,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:55,515 INFO L225 Difference]: With dead ends: 47 [2020-12-23 16:57:55,515 INFO L226 Difference]: Without dead ends: 47 [2020-12-23 16:57:55,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2020-12-23 16:57:55,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-23 16:57:55,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-12-23 16:57:55,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 16:57:55,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-12-23 16:57:55,517 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 36 [2020-12-23 16:57:55,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:55,518 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-12-23 16:57:55,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 16:57:55,518 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-12-23 16:57:55,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 16:57:55,519 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:55,519 INFO L422 BasicCegarLoop]: trace histogram [9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:55,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:55,733 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:57:55,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:55,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1159013500, now seen corresponding path program 2 times [2020-12-23 16:57:55,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:55,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373070609] [2020-12-23 16:57:55,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:55,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:55,816 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-23 16:57:55,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373070609] [2020-12-23 16:57:55,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:57:55,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 16:57:55,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058895936] [2020-12-23 16:57:55,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:57:55,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:55,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:57:55,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:57:55,821 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 5 states. [2020-12-23 16:57:55,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:55,882 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2020-12-23 16:57:55,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:57:55,883 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-12-23 16:57:55,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:55,883 INFO L225 Difference]: With dead ends: 52 [2020-12-23 16:57:55,883 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 16:57:55,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 6 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:57:55,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 16:57:55,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2020-12-23 16:57:55,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-23 16:57:55,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-12-23 16:57:55,887 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 37 [2020-12-23 16:57:55,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:55,887 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-12-23 16:57:55,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:57:55,888 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-12-23 16:57:55,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 16:57:55,889 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:55,889 INFO L422 BasicCegarLoop]: trace histogram [9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:55,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-23 16:57:55,889 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:57:55,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:55,890 INFO L82 PathProgramCache]: Analyzing trace with hash -216066079, now seen corresponding path program 1 times [2020-12-23 16:57:55,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:55,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159528877] [2020-12-23 16:57:55,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:55,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:56,062 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 16:57:56,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159528877] [2020-12-23 16:57:56,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701006078] [2020-12-23 16:57:56,063 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:56,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:56,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 16:57:56,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:56,393 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 16:57:56,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:56,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-12-23 16:57:56,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745311427] [2020-12-23 16:57:56,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 16:57:56,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:56,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 16:57:56,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2020-12-23 16:57:56,395 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 24 states. [2020-12-23 16:57:56,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:56,422 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-12-23 16:57:56,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 16:57:56,423 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 42 [2020-12-23 16:57:56,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:56,423 INFO L225 Difference]: With dead ends: 50 [2020-12-23 16:57:56,423 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 16:57:56,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2020-12-23 16:57:56,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 16:57:56,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-23 16:57:56,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 16:57:56,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-12-23 16:57:56,426 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 42 [2020-12-23 16:57:56,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:56,426 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-12-23 16:57:56,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 16:57:56,426 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-12-23 16:57:56,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 16:57:56,427 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:56,427 INFO L422 BasicCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:56,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 16:57:56,643 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:57:56,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:56,644 INFO L82 PathProgramCache]: Analyzing trace with hash -887844479, now seen corresponding path program 2 times [2020-12-23 16:57:56,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:56,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143523963] [2020-12-23 16:57:56,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:56,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:56,854 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 16:57:56,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143523963] [2020-12-23 16:57:56,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880177805] [2020-12-23 16:57:56,855 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:56,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:57:56,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:56,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 16:57:56,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:57,221 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 16:57:57,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:57,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-12-23 16:57:57,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637250626] [2020-12-23 16:57:57,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 16:57:57,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:57,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 16:57:57,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2020-12-23 16:57:57,223 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 26 states. [2020-12-23 16:57:57,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:57,257 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-12-23 16:57:57,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 16:57:57,258 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 43 [2020-12-23 16:57:57,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:57,258 INFO L225 Difference]: With dead ends: 51 [2020-12-23 16:57:57,258 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 16:57:57,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2020-12-23 16:57:57,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 16:57:57,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-23 16:57:57,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 16:57:57,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-12-23 16:57:57,260 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 43 [2020-12-23 16:57:57,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:57,261 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-12-23 16:57:57,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 16:57:57,261 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-12-23 16:57:57,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 16:57:57,261 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:57,261 INFO L422 BasicCegarLoop]: trace histogram [11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:57,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:57,462 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:57:57,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:57,463 INFO L82 PathProgramCache]: Analyzing trace with hash -238138399, now seen corresponding path program 3 times [2020-12-23 16:57:57,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:57,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082765340] [2020-12-23 16:57:57,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:57,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:57,655 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 16:57:57,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082765340] [2020-12-23 16:57:57,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685971389] [2020-12-23 16:57:57,655 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:57,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 16:57:57,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:57,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 16:57:57,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:57,771 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 16:57:57,772 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:57:57,776 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:57:57,777 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:57:57,777 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-23 16:57:57,878 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-12-23 16:57:57,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:57,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 4] total 18 [2020-12-23 16:57:57,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53763305] [2020-12-23 16:57:57,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 16:57:57,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:57,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 16:57:57,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2020-12-23 16:57:57,880 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 18 states. [2020-12-23 16:57:58,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:58,498 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2020-12-23 16:57:58,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 16:57:58,499 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-12-23 16:57:58,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:58,499 INFO L225 Difference]: With dead ends: 65 [2020-12-23 16:57:58,499 INFO L226 Difference]: Without dead ends: 65 [2020-12-23 16:57:58,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=336, Invalid=786, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 16:57:58,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-23 16:57:58,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2020-12-23 16:57:58,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 16:57:58,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2020-12-23 16:57:58,503 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 44 [2020-12-23 16:57:58,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:58,503 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2020-12-23 16:57:58,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 16:57:58,503 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2020-12-23 16:57:58,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 16:57:58,504 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:58,504 INFO L422 BasicCegarLoop]: trace histogram [12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:58,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 16:57:58,719 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:57:58,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:58,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1286437294, now seen corresponding path program 1 times [2020-12-23 16:57:58,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:58,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389383306] [2020-12-23 16:57:58,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:58,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:58,936 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 16:57:58,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389383306] [2020-12-23 16:57:58,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452580587] [2020-12-23 16:57:58,937 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:59,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:59,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 16:57:59,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:59,367 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 16:57:59,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:59,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2020-12-23 16:57:59,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415075936] [2020-12-23 16:57:59,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 16:57:59,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:59,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 16:57:59,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2020-12-23 16:57:59,369 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 30 states. [2020-12-23 16:57:59,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:59,416 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-12-23 16:57:59,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 16:57:59,416 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 49 [2020-12-23 16:57:59,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:59,417 INFO L225 Difference]: With dead ends: 58 [2020-12-23 16:57:59,417 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 16:57:59,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2020-12-23 16:57:59,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 16:57:59,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-12-23 16:57:59,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-23 16:57:59,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2020-12-23 16:57:59,420 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 49 [2020-12-23 16:57:59,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:59,420 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2020-12-23 16:57:59,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 16:57:59,420 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2020-12-23 16:57:59,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-23 16:57:59,421 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:59,421 INFO L422 BasicCegarLoop]: trace histogram [13, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:57:59,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:59,636 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:57:59,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:59,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1219426482, now seen corresponding path program 2 times [2020-12-23 16:57:59,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:59,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027733367] [2020-12-23 16:57:59,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:59,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:59,874 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 16:57:59,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027733367] [2020-12-23 16:57:59,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320108133] [2020-12-23 16:57:59,875 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:59,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:57:59,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:59,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 16:57:59,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:00,356 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 16:58:00,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:00,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2020-12-23 16:58:00,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546895667] [2020-12-23 16:58:00,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 16:58:00,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:00,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 16:58:00,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2020-12-23 16:58:00,358 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 32 states. [2020-12-23 16:58:00,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:00,431 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2020-12-23 16:58:00,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 16:58:00,432 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 50 [2020-12-23 16:58:00,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:00,433 INFO L225 Difference]: With dead ends: 59 [2020-12-23 16:58:00,433 INFO L226 Difference]: Without dead ends: 59 [2020-12-23 16:58:00,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2020-12-23 16:58:00,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-23 16:58:00,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-12-23 16:58:00,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 16:58:00,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2020-12-23 16:58:00,438 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 50 [2020-12-23 16:58:00,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:00,438 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2020-12-23 16:58:00,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 16:58:00,438 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2020-12-23 16:58:00,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 16:58:00,439 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:00,439 INFO L422 BasicCegarLoop]: trace histogram [14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:00,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 16:58:00,649 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:58:00,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:00,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1591792210, now seen corresponding path program 3 times [2020-12-23 16:58:00,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:00,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779042494] [2020-12-23 16:58:00,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:00,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:00,916 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 16:58:00,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779042494] [2020-12-23 16:58:00,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553821228] [2020-12-23 16:58:00,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:01,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 16:58:01,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:58:01,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 16:58:01,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:01,053 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-23 16:58:01,054 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:01,056 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:01,056 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:58:01,057 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-12-23 16:58:01,084 INFO L348 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2020-12-23 16:58:01,084 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:58:01,086 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:01,090 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:01,091 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:58:01,091 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-23 16:58:01,127 INFO L348 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2020-12-23 16:58:01,127 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2020-12-23 16:58:01,130 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:01,136 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:01,137 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:58:01,137 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2020-12-23 16:58:01,191 INFO L348 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2020-12-23 16:58:01,191 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 44 [2020-12-23 16:58:01,193 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:01,201 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:01,202 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:58:01,205 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:35 [2020-12-23 16:58:01,282 INFO L348 Elim1Store]: treesize reduction 164, result has 17.6 percent of original size [2020-12-23 16:58:01,283 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 56 [2020-12-23 16:58:01,285 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:01,295 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:01,295 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:58:01,296 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:44 [2020-12-23 16:58:01,402 INFO L348 Elim1Store]: treesize reduction 236, result has 15.7 percent of original size [2020-12-23 16:58:01,402 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 57 treesize of output 68 [2020-12-23 16:58:01,404 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:01,417 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:01,418 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:58:01,418 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:53 [2020-12-23 16:58:01,559 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 33 [2020-12-23 16:58:01,560 INFO L348 Elim1Store]: treesize reduction 320, result has 14.2 percent of original size [2020-12-23 16:58:01,560 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 66 treesize of output 80 [2020-12-23 16:58:01,563 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:01,578 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:01,579 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:58:01,579 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:62 [2020-12-23 16:58:01,749 INFO L348 Elim1Store]: treesize reduction 240, result has 0.4 percent of original size [2020-12-23 16:58:01,749 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 69 treesize of output 25 [2020-12-23 16:58:01,754 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:01,758 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:01,759 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:58:01,759 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:7 [2020-12-23 16:58:01,808 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-12-23 16:58:01,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:01,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 28 [2020-12-23 16:58:01,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901673558] [2020-12-23 16:58:01,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 16:58:01,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:01,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 16:58:01,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2020-12-23 16:58:01,810 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 28 states. [2020-12-23 16:58:02,537 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-12-23 16:58:02,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:02,866 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2020-12-23 16:58:02,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 16:58:02,867 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 51 [2020-12-23 16:58:02,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:02,867 INFO L225 Difference]: With dead ends: 68 [2020-12-23 16:58:02,867 INFO L226 Difference]: Without dead ends: 68 [2020-12-23 16:58:02,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=346, Invalid=1136, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 16:58:02,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-23 16:58:02,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2020-12-23 16:58:02,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-23 16:58:02,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2020-12-23 16:58:02,871 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 51 [2020-12-23 16:58:02,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:02,871 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2020-12-23 16:58:02,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 16:58:02,872 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2020-12-23 16:58:02,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 16:58:02,872 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:02,872 INFO L422 BasicCegarLoop]: trace histogram [15, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:03,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 16:58:03,084 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:58:03,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:03,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1005878547, now seen corresponding path program 4 times [2020-12-23 16:58:03,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:03,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967468765] [2020-12-23 16:58:03,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:03,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:03,442 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-23 16:58:03,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967468765] [2020-12-23 16:58:03,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165078658] [2020-12-23 16:58:03,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:03,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:58:03,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:58:03,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 16:58:03,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:03,632 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-23 16:58:03,633 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:03,637 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:03,637 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:58:03,638 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:7 [2020-12-23 16:58:03,663 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-12-23 16:58:03,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:03,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 26 [2020-12-23 16:58:03,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074295488] [2020-12-23 16:58:03,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 16:58:03,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:03,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 16:58:03,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=463, Unknown=0, NotChecked=0, Total=650 [2020-12-23 16:58:03,664 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 26 states. [2020-12-23 16:58:04,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:04,386 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2020-12-23 16:58:04,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 16:58:04,386 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 57 [2020-12-23 16:58:04,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:04,387 INFO L225 Difference]: With dead ends: 68 [2020-12-23 16:58:04,387 INFO L226 Difference]: Without dead ends: 68 [2020-12-23 16:58:04,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=264, Invalid=858, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 16:58:04,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-23 16:58:04,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2020-12-23 16:58:04,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-23 16:58:04,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2020-12-23 16:58:04,390 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 57 [2020-12-23 16:58:04,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:04,390 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2020-12-23 16:58:04,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 16:58:04,391 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2020-12-23 16:58:04,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-23 16:58:04,391 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:04,391 INFO L422 BasicCegarLoop]: trace histogram [16, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:04,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 16:58:04,606 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:58:04,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:04,607 INFO L82 PathProgramCache]: Analyzing trace with hash 426595598, now seen corresponding path program 4 times [2020-12-23 16:58:04,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:04,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520089888] [2020-12-23 16:58:04,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:04,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:04,967 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-23 16:58:04,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520089888] [2020-12-23 16:58:04,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294393579] [2020-12-23 16:58:04,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:05,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:58:05,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:58:05,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 16:58:05,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:05,217 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-23 16:58:05,218 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:05,222 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:05,223 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:58:05,223 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:7 [2020-12-23 16:58:05,250 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-12-23 16:58:05,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:05,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11] total 29 [2020-12-23 16:58:05,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738750158] [2020-12-23 16:58:05,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 16:58:05,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:05,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 16:58:05,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=598, Unknown=0, NotChecked=0, Total=812 [2020-12-23 16:58:05,252 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 29 states. [2020-12-23 16:58:05,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:05,991 INFO L93 Difference]: Finished difference Result 97 states and 103 transitions. [2020-12-23 16:58:05,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 16:58:05,991 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 59 [2020-12-23 16:58:05,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:05,992 INFO L225 Difference]: With dead ends: 97 [2020-12-23 16:58:05,992 INFO L226 Difference]: Without dead ends: 97 [2020-12-23 16:58:05,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=317, Invalid=1323, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 16:58:05,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-23 16:58:06,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2020-12-23 16:58:06,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-23 16:58:06,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2020-12-23 16:58:06,003 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 59 [2020-12-23 16:58:06,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:06,003 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2020-12-23 16:58:06,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 16:58:06,003 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2020-12-23 16:58:06,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 16:58:06,004 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:06,004 INFO L422 BasicCegarLoop]: trace histogram [17, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:06,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 16:58:06,217 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:58:06,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:06,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1298646593, now seen corresponding path program 5 times [2020-12-23 16:58:06,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:06,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087229922] [2020-12-23 16:58:06,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:06,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:06,615 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 16:58:06,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087229922] [2020-12-23 16:58:06,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452986069] [2020-12-23 16:58:06,616 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:06,875 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-23 16:58:06,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:58:06,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 16:58:06,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:07,416 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 16:58:07,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:07,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2020-12-23 16:58:07,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109322087] [2020-12-23 16:58:07,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 16:58:07,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:07,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 16:58:07,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 16:58:07,419 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand 40 states. [2020-12-23 16:58:07,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:07,488 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2020-12-23 16:58:07,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 16:58:07,488 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 64 [2020-12-23 16:58:07,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:07,489 INFO L225 Difference]: With dead ends: 89 [2020-12-23 16:58:07,489 INFO L226 Difference]: Without dead ends: 89 [2020-12-23 16:58:07,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 16:58:07,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-23 16:58:07,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-12-23 16:58:07,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-23 16:58:07,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2020-12-23 16:58:07,492 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 64 [2020-12-23 16:58:07,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:07,492 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2020-12-23 16:58:07,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 16:58:07,492 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2020-12-23 16:58:07,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 16:58:07,493 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:07,493 INFO L422 BasicCegarLoop]: trace histogram [18, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:07,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:07,708 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:58:07,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:07,709 INFO L82 PathProgramCache]: Analyzing trace with hash -985875617, now seen corresponding path program 6 times [2020-12-23 16:58:07,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:07,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382969427] [2020-12-23 16:58:07,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:07,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:08,119 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 16:58:08,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382969427] [2020-12-23 16:58:08,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940963213] [2020-12-23 16:58:08,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:08,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 16:58:08,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:58:08,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 16:58:08,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:08,583 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-23 16:58:08,583 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:08,588 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:08,589 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:58:08,589 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-12-23 16:58:08,606 INFO L348 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2020-12-23 16:58:08,606 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:58:08,608 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:08,612 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:08,612 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:58:08,613 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-23 16:58:08,647 INFO L348 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2020-12-23 16:58:08,647 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2020-12-23 16:58:08,650 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:08,656 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:08,656 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:58:08,656 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2020-12-23 16:58:08,711 INFO L348 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2020-12-23 16:58:08,711 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 44 [2020-12-23 16:58:08,713 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:08,720 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:08,721 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:58:08,721 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:35 [2020-12-23 16:58:08,786 INFO L348 Elim1Store]: treesize reduction 164, result has 17.6 percent of original size [2020-12-23 16:58:08,786 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 56 [2020-12-23 16:58:08,788 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:08,798 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:08,801 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:58:08,801 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:44 [2020-12-23 16:58:08,912 INFO L348 Elim1Store]: treesize reduction 236, result has 15.7 percent of original size [2020-12-23 16:58:08,912 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 57 treesize of output 68 [2020-12-23 16:58:08,916 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:08,930 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:08,931 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:58:08,931 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:53 [2020-12-23 16:58:09,078 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 33 [2020-12-23 16:58:09,079 INFO L348 Elim1Store]: treesize reduction 320, result has 14.2 percent of original size [2020-12-23 16:58:09,079 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 66 treesize of output 80 [2020-12-23 16:58:09,084 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:09,099 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:09,100 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:58:09,100 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:62 [2020-12-23 16:58:09,285 INFO L348 Elim1Store]: treesize reduction 240, result has 0.4 percent of original size [2020-12-23 16:58:09,285 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 69 treesize of output 25 [2020-12-23 16:58:09,288 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:09,293 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:09,294 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:58:09,294 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:7 [2020-12-23 16:58:09,343 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-12-23 16:58:09,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:09,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13] total 33 [2020-12-23 16:58:09,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271254918] [2020-12-23 16:58:09,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 16:58:09,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:09,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 16:58:09,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 16:58:09,345 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand 33 states. [2020-12-23 16:58:10,006 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-12-23 16:58:10,285 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-12-23 16:58:10,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:10,562 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2020-12-23 16:58:10,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 16:58:10,563 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 65 [2020-12-23 16:58:10,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:10,564 INFO L225 Difference]: With dead ends: 77 [2020-12-23 16:58:10,564 INFO L226 Difference]: Without dead ends: 77 [2020-12-23 16:58:10,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=476, Invalid=1594, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 16:58:10,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-23 16:58:10,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2020-12-23 16:58:10,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-23 16:58:10,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2020-12-23 16:58:10,568 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 65 [2020-12-23 16:58:10,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:10,568 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2020-12-23 16:58:10,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 16:58:10,568 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2020-12-23 16:58:10,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-23 16:58:10,569 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:10,569 INFO L422 BasicCegarLoop]: trace histogram [19, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:10,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:10,784 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:58:10,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:10,785 INFO L82 PathProgramCache]: Analyzing trace with hash -188272279, now seen corresponding path program 5 times [2020-12-23 16:58:10,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:10,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137473623] [2020-12-23 16:58:10,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:10,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:11,181 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-23 16:58:11,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137473623] [2020-12-23 16:58:11,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456171329] [2020-12-23 16:58:11,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:11,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-23 16:58:11,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:58:11,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 16:58:11,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:12,332 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-23 16:58:12,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:12,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2020-12-23 16:58:12,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767252066] [2020-12-23 16:58:12,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 16:58:12,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:12,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 16:58:12,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 16:58:12,335 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 44 states. [2020-12-23 16:58:12,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:12,411 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2020-12-23 16:58:12,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 16:58:12,412 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 67 [2020-12-23 16:58:12,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:12,412 INFO L225 Difference]: With dead ends: 75 [2020-12-23 16:58:12,412 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 16:58:12,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 16:58:12,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 16:58:12,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-12-23 16:58:12,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-23 16:58:12,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2020-12-23 16:58:12,416 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 67 [2020-12-23 16:58:12,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:12,416 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2020-12-23 16:58:12,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 16:58:12,416 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2020-12-23 16:58:12,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-23 16:58:12,417 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:12,417 INFO L422 BasicCegarLoop]: trace histogram [20, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:12,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-23 16:58:12,633 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:58:12,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:12,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1787808713, now seen corresponding path program 6 times [2020-12-23 16:58:12,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:12,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99293598] [2020-12-23 16:58:12,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:12,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:13,157 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-23 16:58:13,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99293598] [2020-12-23 16:58:13,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984365227] [2020-12-23 16:58:13,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:13,330 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 16:58:13,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:58:13,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 16:58:13,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:13,340 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-23 16:58:13,340 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:13,342 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:13,342 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:58:13,343 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-12-23 16:58:13,370 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-23 16:58:13,371 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:13,377 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:13,377 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:58:13,378 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2020-12-23 16:58:13,399 INFO L348 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2020-12-23 16:58:13,400 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:58:13,401 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:13,407 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:13,408 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:58:13,408 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2020-12-23 16:58:13,446 INFO L348 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2020-12-23 16:58:13,447 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2020-12-23 16:58:13,448 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:13,456 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:13,457 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:58:13,457 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2020-12-23 16:58:13,510 INFO L348 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2020-12-23 16:58:13,511 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 44 [2020-12-23 16:58:13,512 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:13,523 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:13,524 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:58:13,524 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:40 [2020-12-23 16:58:13,598 INFO L348 Elim1Store]: treesize reduction 164, result has 17.6 percent of original size [2020-12-23 16:58:13,599 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 56 [2020-12-23 16:58:13,601 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:13,614 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:13,615 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:58:13,615 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:49 [2020-12-23 16:58:13,711 INFO L348 Elim1Store]: treesize reduction 236, result has 15.7 percent of original size [2020-12-23 16:58:13,711 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 57 treesize of output 68 [2020-12-23 16:58:13,715 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:13,730 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:13,731 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:58:13,731 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:62, output treesize:58 [2020-12-23 16:58:13,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:13,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:13,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:13,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:13,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:13,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:13,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:13,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:13,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:13,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:13,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:13,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:13,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:13,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:13,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:13,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:13,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:13,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:13,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:13,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:13,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:13,805 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 80 [2020-12-23 16:58:13,808 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:13,830 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:13,831 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:58:13,832 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:78, output treesize:74 [2020-12-23 16:58:14,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:14,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:14,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:14,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:14,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:14,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:14,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:14,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:14,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:14,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:14,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:14,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:14,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:14,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:14,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:14,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:14,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:14,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:14,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:14,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:14,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:14,144 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 25 [2020-12-23 16:58:14,148 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:14,157 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:14,157 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:58:14,158 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:90, output treesize:25 [2020-12-23 16:58:14,266 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-12-23 16:58:14,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:14,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 14] total 37 [2020-12-23 16:58:14,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153141619] [2020-12-23 16:58:14,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 16:58:14,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:14,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 16:58:14,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=999, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 16:58:14,270 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 37 states. [2020-12-23 16:58:16,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:16,528 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2020-12-23 16:58:16,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 16:58:16,528 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 68 [2020-12-23 16:58:16,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:16,529 INFO L225 Difference]: With dead ends: 75 [2020-12-23 16:58:16,529 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 16:58:16,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1284 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1094, Invalid=4018, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 16:58:16,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 16:58:16,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-12-23 16:58:16,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-23 16:58:16,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2020-12-23 16:58:16,533 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 68 [2020-12-23 16:58:16,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:16,533 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2020-12-23 16:58:16,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 16:58:16,533 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2020-12-23 16:58:16,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-23 16:58:16,534 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:16,534 INFO L422 BasicCegarLoop]: trace histogram [21, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:16,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:16,740 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:58:16,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:16,741 INFO L82 PathProgramCache]: Analyzing trace with hash 356446778, now seen corresponding path program 7 times [2020-12-23 16:58:16,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:16,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369013279] [2020-12-23 16:58:16,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:16,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:17,259 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-23 16:58:17,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369013279] [2020-12-23 16:58:17,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951035210] [2020-12-23 16:58:17,260 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:17,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:17,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 16:58:17,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:18,149 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-23 16:58:18,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:18,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2020-12-23 16:58:18,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093789301] [2020-12-23 16:58:18,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 16:58:18,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:18,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 16:58:18,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 16:58:18,152 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 48 states. [2020-12-23 16:58:18,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:18,210 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2020-12-23 16:58:18,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 16:58:18,211 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 73 [2020-12-23 16:58:18,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:18,211 INFO L225 Difference]: With dead ends: 75 [2020-12-23 16:58:18,211 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 16:58:18,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 16:58:18,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 16:58:18,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-12-23 16:58:18,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-23 16:58:18,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2020-12-23 16:58:18,214 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 73 [2020-12-23 16:58:18,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:18,215 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2020-12-23 16:58:18,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 16:58:18,215 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2020-12-23 16:58:18,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-23 16:58:18,215 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:18,216 INFO L422 BasicCegarLoop]: trace histogram [22, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:18,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 16:58:18,430 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:58:18,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:18,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1795310746, now seen corresponding path program 8 times [2020-12-23 16:58:18,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:18,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077519865] [2020-12-23 16:58:18,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:18,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:18,924 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-23 16:58:18,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077519865] [2020-12-23 16:58:18,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151188272] [2020-12-23 16:58:18,924 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:19,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:58:19,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:58:19,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 16:58:19,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:19,761 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-23 16:58:19,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:19,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2020-12-23 16:58:19,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036949373] [2020-12-23 16:58:19,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-23 16:58:19,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:19,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-23 16:58:19,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 16:58:19,764 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 50 states. [2020-12-23 16:58:19,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:19,845 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2020-12-23 16:58:19,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 16:58:19,846 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 74 [2020-12-23 16:58:19,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:19,847 INFO L225 Difference]: With dead ends: 76 [2020-12-23 16:58:19,847 INFO L226 Difference]: Without dead ends: 76 [2020-12-23 16:58:19,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 16:58:19,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-23 16:58:19,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-12-23 16:58:19,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 16:58:19,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2020-12-23 16:58:19,850 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 74 [2020-12-23 16:58:19,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:19,850 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2020-12-23 16:58:19,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-23 16:58:19,850 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2020-12-23 16:58:19,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-23 16:58:19,851 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:19,851 INFO L422 BasicCegarLoop]: trace histogram [23, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:20,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 16:58:20,061 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:58:20,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:20,062 INFO L82 PathProgramCache]: Analyzing trace with hash -844546502, now seen corresponding path program 9 times [2020-12-23 16:58:20,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:20,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582335963] [2020-12-23 16:58:20,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:20,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:20,603 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-23 16:58:20,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582335963] [2020-12-23 16:58:20,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633945351] [2020-12-23 16:58:20,604 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:20,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 16:58:20,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:58:20,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 16:58:20,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:20,788 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-23 16:58:20,788 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:20,792 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:20,793 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:58:20,793 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-12-23 16:58:20,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:20,813 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:58:20,819 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:20,825 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:20,826 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:58:20,826 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2020-12-23 16:58:20,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:20,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:20,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:20,850 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:20,850 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2020-12-23 16:58:20,851 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:20,859 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:20,860 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:58:20,860 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2020-12-23 16:58:20,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:20,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:20,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:20,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:20,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:20,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:20,889 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:20,889 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2020-12-23 16:58:20,890 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:20,900 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:20,901 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:58:20,901 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:38 [2020-12-23 16:58:20,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:20,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:20,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:20,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:20,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:20,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:20,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:20,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:20,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:20,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:20,939 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:20,939 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2020-12-23 16:58:20,941 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:20,953 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:20,954 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:58:20,954 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:47 [2020-12-23 16:58:20,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:20,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:20,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:20,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:20,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:20,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:20,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:20,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:20,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:20,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:20,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:20,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:20,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:20,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:21,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:21,002 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:21,002 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2020-12-23 16:58:21,004 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:21,019 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:21,020 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:58:21,020 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:56 [2020-12-23 16:58:21,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:21,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:21,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:21,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:21,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:21,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:21,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:21,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:21,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:21,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:21,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:21,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:21,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:21,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:21,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:21,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:21,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:21,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:21,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:21,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:21,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:58:21,078 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:21,078 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2020-12-23 16:58:21,080 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:21,097 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:21,098 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:58:21,098 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:69, output treesize:65 [2020-12-23 16:58:21,313 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:21,313 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 57 treesize of output 25 [2020-12-23 16:58:21,317 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:58:21,321 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:58:21,321 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:58:21,322 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:7 [2020-12-23 16:58:21,394 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-12-23 16:58:21,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:21,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 14] total 39 [2020-12-23 16:58:21,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378525928] [2020-12-23 16:58:21,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 16:58:21,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:21,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 16:58:21,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=1076, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 16:58:21,397 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 39 states. [2020-12-23 16:58:23,043 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-12-23 16:58:23,407 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-12-23 16:58:23,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:23,702 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2020-12-23 16:58:23,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 16:58:23,702 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 75 [2020-12-23 16:58:23,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:23,703 INFO L225 Difference]: With dead ends: 85 [2020-12-23 16:58:23,703 INFO L226 Difference]: Without dead ends: 85 [2020-12-23 16:58:23,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1362 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1331, Invalid=4521, Unknown=0, NotChecked=0, Total=5852 [2020-12-23 16:58:23,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-23 16:58:23,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-12-23 16:58:23,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-23 16:58:23,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2020-12-23 16:58:23,709 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 75 [2020-12-23 16:58:23,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:23,709 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2020-12-23 16:58:23,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 16:58:23,709 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2020-12-23 16:58:23,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-23 16:58:23,710 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:23,710 INFO L422 BasicCegarLoop]: trace histogram [24, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:23,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 16:58:23,915 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:58:23,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:23,916 INFO L82 PathProgramCache]: Analyzing trace with hash 727487538, now seen corresponding path program 10 times [2020-12-23 16:58:23,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:23,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724036450] [2020-12-23 16:58:23,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:23,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:24,480 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-23 16:58:24,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724036450] [2020-12-23 16:58:24,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176142702] [2020-12-23 16:58:24,481 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:26,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:58:26,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:58:26,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 16:58:26,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:27,346 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-23 16:58:27,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:27,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2020-12-23 16:58:27,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676052838] [2020-12-23 16:58:27,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-23 16:58:27,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:27,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-23 16:58:27,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 16:58:27,350 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand 54 states. [2020-12-23 16:58:27,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:27,419 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2020-12-23 16:58:27,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 16:58:27,420 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 81 [2020-12-23 16:58:27,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:27,421 INFO L225 Difference]: With dead ends: 83 [2020-12-23 16:58:27,421 INFO L226 Difference]: Without dead ends: 83 [2020-12-23 16:58:27,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 16:58:27,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-23 16:58:27,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-12-23 16:58:27,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-23 16:58:27,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2020-12-23 16:58:27,425 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 81 [2020-12-23 16:58:27,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:27,425 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2020-12-23 16:58:27,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-23 16:58:27,425 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2020-12-23 16:58:27,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-23 16:58:27,426 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:27,426 INFO L422 BasicCegarLoop]: trace histogram [25, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:27,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 16:58:27,642 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:58:27,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:27,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1822980462, now seen corresponding path program 11 times [2020-12-23 16:58:27,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:27,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750037231] [2020-12-23 16:58:27,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:27,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:28,387 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-23 16:58:28,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750037231] [2020-12-23 16:58:28,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233121901] [2020-12-23 16:58:28,388 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:29,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-12-23 16:58:29,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:58:29,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 16:58:29,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:29,937 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-23 16:58:29,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:29,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 56 [2020-12-23 16:58:29,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724431902] [2020-12-23 16:58:29,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-23 16:58:29,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:29,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-23 16:58:29,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 16:58:29,946 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 56 states. [2020-12-23 16:58:30,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:30,036 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2020-12-23 16:58:30,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 16:58:30,037 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 82 [2020-12-23 16:58:30,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:30,038 INFO L225 Difference]: With dead ends: 84 [2020-12-23 16:58:30,038 INFO L226 Difference]: Without dead ends: 84 [2020-12-23 16:58:30,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 16:58:30,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-23 16:58:30,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-12-23 16:58:30,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-23 16:58:30,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2020-12-23 16:58:30,041 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 82 [2020-12-23 16:58:30,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:30,041 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2020-12-23 16:58:30,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-23 16:58:30,042 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2020-12-23 16:58:30,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 16:58:30,042 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:30,042 INFO L422 BasicCegarLoop]: trace histogram [26, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:30,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 16:58:30,257 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:58:30,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:30,258 INFO L82 PathProgramCache]: Analyzing trace with hash 716890162, now seen corresponding path program 12 times [2020-12-23 16:58:30,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:30,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069516138] [2020-12-23 16:58:30,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:30,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:30,918 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-23 16:58:30,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069516138] [2020-12-23 16:58:30,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394060947] [2020-12-23 16:58:30,918 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:35,910 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-12-23 16:58:35,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:58:35,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 16:58:35,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:36,981 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-23 16:58:36,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:36,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2020-12-23 16:58:36,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705048107] [2020-12-23 16:58:36,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-23 16:58:36,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:36,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-23 16:58:36,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 16:58:36,983 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 58 states. [2020-12-23 16:58:37,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:37,063 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2020-12-23 16:58:37,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 16:58:37,063 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 83 [2020-12-23 16:58:37,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:37,064 INFO L225 Difference]: With dead ends: 85 [2020-12-23 16:58:37,064 INFO L226 Difference]: Without dead ends: 85 [2020-12-23 16:58:37,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 16:58:37,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-23 16:58:37,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-12-23 16:58:37,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-23 16:58:37,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2020-12-23 16:58:37,068 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 83 [2020-12-23 16:58:37,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:37,069 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2020-12-23 16:58:37,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-23 16:58:37,069 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2020-12-23 16:58:37,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-23 16:58:37,069 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:37,070 INFO L422 BasicCegarLoop]: trace histogram [27, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:37,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:37,285 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:58:37,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:37,286 INFO L82 PathProgramCache]: Analyzing trace with hash 2143468178, now seen corresponding path program 13 times [2020-12-23 16:58:37,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:37,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863336026] [2020-12-23 16:58:37,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:38,034 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-23 16:58:38,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863336026] [2020-12-23 16:58:38,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003339856] [2020-12-23 16:58:38,035 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:38,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:38,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 16:58:38,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:39,231 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-23 16:58:39,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:39,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 60 [2020-12-23 16:58:39,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173845226] [2020-12-23 16:58:39,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-23 16:58:39,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:39,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-23 16:58:39,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 16:58:39,233 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand 60 states. [2020-12-23 16:58:39,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:39,326 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2020-12-23 16:58:39,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 16:58:39,326 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 84 [2020-12-23 16:58:39,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:39,327 INFO L225 Difference]: With dead ends: 86 [2020-12-23 16:58:39,327 INFO L226 Difference]: Without dead ends: 86 [2020-12-23 16:58:39,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 16:58:39,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-23 16:58:39,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-12-23 16:58:39,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-23 16:58:39,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2020-12-23 16:58:39,330 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 84 [2020-12-23 16:58:39,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:39,330 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2020-12-23 16:58:39,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-23 16:58:39,330 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2020-12-23 16:58:39,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-23 16:58:39,331 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:39,331 INFO L422 BasicCegarLoop]: trace histogram [28, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:39,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 16:58:39,540 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:58:39,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:39,541 INFO L82 PathProgramCache]: Analyzing trace with hash -877253582, now seen corresponding path program 14 times [2020-12-23 16:58:39,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:39,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999540481] [2020-12-23 16:58:39,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:39,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:40,339 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-23 16:58:40,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999540481] [2020-12-23 16:58:40,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838308239] [2020-12-23 16:58:40,340 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:40,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:58:40,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:58:40,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 16:58:40,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:41,698 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-23 16:58:41,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:41,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 62 [2020-12-23 16:58:41,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165523677] [2020-12-23 16:58:41,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-23 16:58:41,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:41,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-23 16:58:41,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 16:58:41,706 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 62 states. [2020-12-23 16:58:41,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:41,798 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2020-12-23 16:58:41,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 16:58:41,800 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 85 [2020-12-23 16:58:41,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:41,801 INFO L225 Difference]: With dead ends: 87 [2020-12-23 16:58:41,802 INFO L226 Difference]: Without dead ends: 87 [2020-12-23 16:58:41,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1306 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 16:58:41,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-23 16:58:41,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-12-23 16:58:41,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-23 16:58:41,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2020-12-23 16:58:41,804 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 85 [2020-12-23 16:58:41,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:41,805 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2020-12-23 16:58:41,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-23 16:58:41,805 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2020-12-23 16:58:41,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-23 16:58:41,805 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:41,806 INFO L422 BasicCegarLoop]: trace histogram [29, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:42,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-12-23 16:58:42,021 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:58:42,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:42,022 INFO L82 PathProgramCache]: Analyzing trace with hash -30347630, now seen corresponding path program 15 times [2020-12-23 16:58:42,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:42,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99629195] [2020-12-23 16:58:42,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:42,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:42,899 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-23 16:58:42,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99629195] [2020-12-23 16:58:42,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882650799] [2020-12-23 16:58:42,900 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:57,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-23 16:58:57,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:58:58,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 16:58:58,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:59,305 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-23 16:58:59,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:59,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 64 [2020-12-23 16:58:59,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134373315] [2020-12-23 16:58:59,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-23 16:58:59,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:59,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-23 16:58:59,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 16:58:59,307 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 64 states. [2020-12-23 16:58:59,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:59,416 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2020-12-23 16:58:59,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 16:58:59,420 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 86 [2020-12-23 16:58:59,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:59,421 INFO L225 Difference]: With dead ends: 88 [2020-12-23 16:58:59,421 INFO L226 Difference]: Without dead ends: 88 [2020-12-23 16:58:59,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1396 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 16:58:59,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-23 16:58:59,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-12-23 16:58:59,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-23 16:58:59,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2020-12-23 16:58:59,424 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 86 [2020-12-23 16:58:59,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:59,424 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2020-12-23 16:58:59,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-23 16:58:59,424 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2020-12-23 16:58:59,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-23 16:58:59,425 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:59,425 INFO L422 BasicCegarLoop]: trace histogram [30, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:59,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:59,641 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:58:59,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:59,642 INFO L82 PathProgramCache]: Analyzing trace with hash 453933106, now seen corresponding path program 16 times [2020-12-23 16:58:59,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:59,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034789743] [2020-12-23 16:58:59,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:59,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:59:00,589 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-23 16:59:00,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034789743] [2020-12-23 16:59:00,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553874170] [2020-12-23 16:59:00,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:59:05,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:59:05,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:59:05,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 16:59:05,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:59:06,451 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-23 16:59:06,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:59:06,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2020-12-23 16:59:06,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789824532] [2020-12-23 16:59:06,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-23 16:59:06,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:59:06,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-23 16:59:06,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 16:59:06,453 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 66 states. [2020-12-23 16:59:06,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:59:06,573 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2020-12-23 16:59:06,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 16:59:06,573 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 87 [2020-12-23 16:59:06,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:59:06,574 INFO L225 Difference]: With dead ends: 89 [2020-12-23 16:59:06,574 INFO L226 Difference]: Without dead ends: 89 [2020-12-23 16:59:06,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1489 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 16:59:06,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-23 16:59:06,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-12-23 16:59:06,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-23 16:59:06,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2020-12-23 16:59:06,577 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 87 [2020-12-23 16:59:06,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:59:06,578 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2020-12-23 16:59:06,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-12-23 16:59:06,578 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2020-12-23 16:59:06,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-23 16:59:06,578 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:59:06,578 INFO L422 BasicCegarLoop]: trace histogram [31, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:59:06,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-23 16:59:06,792 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:59:06,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:59:06,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1713233262, now seen corresponding path program 17 times [2020-12-23 16:59:06,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:59:06,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707322717] [2020-12-23 16:59:06,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:59:06,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:59:07,705 INFO L134 CoverageAnalysis]: Checked inductivity of 538 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-23 16:59:07,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707322717] [2020-12-23 16:59:07,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886158824] [2020-12-23 16:59:07,706 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:59:09,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-12-23 16:59:09,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:59:09,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 16:59:09,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:59:10,498 INFO L134 CoverageAnalysis]: Checked inductivity of 538 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-23 16:59:10,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:59:10,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2020-12-23 16:59:10,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57094589] [2020-12-23 16:59:10,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-23 16:59:10,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:59:10,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-23 16:59:10,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 16:59:10,500 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 68 states. [2020-12-23 16:59:10,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:59:10,624 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2020-12-23 16:59:10,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 16:59:10,625 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 88 [2020-12-23 16:59:10,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:59:10,626 INFO L225 Difference]: With dead ends: 90 [2020-12-23 16:59:10,626 INFO L226 Difference]: Without dead ends: 90 [2020-12-23 16:59:10,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1585 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 16:59:10,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-23 16:59:10,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-12-23 16:59:10,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-23 16:59:10,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2020-12-23 16:59:10,629 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 88 [2020-12-23 16:59:10,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:59:10,629 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2020-12-23 16:59:10,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-23 16:59:10,629 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2020-12-23 16:59:10,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-23 16:59:10,630 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:59:10,630 INFO L422 BasicCegarLoop]: trace histogram [32, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:59:10,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:59:10,844 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:59:10,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:59:10,844 INFO L82 PathProgramCache]: Analyzing trace with hash -175913934, now seen corresponding path program 18 times [2020-12-23 16:59:10,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:59:10,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362627569] [2020-12-23 16:59:10,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:59:10,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:59:11,903 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-23 16:59:11,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362627569] [2020-12-23 16:59:11,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214891545] [2020-12-23 16:59:11,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:59:36,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-12-23 16:59:36,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:59:36,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 16:59:36,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:59:37,795 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-23 16:59:37,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:59:37,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 70 [2020-12-23 16:59:37,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411263150] [2020-12-23 16:59:37,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-23 16:59:37,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:59:37,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-23 16:59:37,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 16:59:37,799 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand 70 states. [2020-12-23 16:59:37,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:59:37,915 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2020-12-23 16:59:37,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 16:59:37,916 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 89 [2020-12-23 16:59:37,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:59:37,916 INFO L225 Difference]: With dead ends: 91 [2020-12-23 16:59:37,917 INFO L226 Difference]: Without dead ends: 91 [2020-12-23 16:59:37,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1684 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 16:59:37,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-23 16:59:37,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-12-23 16:59:37,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-23 16:59:37,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2020-12-23 16:59:37,920 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 89 [2020-12-23 16:59:37,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:59:37,920 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2020-12-23 16:59:37,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-23 16:59:37,921 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2020-12-23 16:59:37,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-23 16:59:37,921 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:59:37,921 INFO L422 BasicCegarLoop]: trace histogram [33, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:59:38,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-23 16:59:38,123 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:59:38,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:59:38,124 INFO L82 PathProgramCache]: Analyzing trace with hash 236344978, now seen corresponding path program 19 times [2020-12-23 16:59:38,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:59:38,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412820887] [2020-12-23 16:59:38,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:59:38,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:59:39,191 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-23 16:59:39,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412820887] [2020-12-23 16:59:39,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861737005] [2020-12-23 16:59:39,192 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:59:39,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:59:39,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 16:59:39,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:59:40,953 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-23 16:59:40,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:59:40,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 72 [2020-12-23 16:59:40,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981460321] [2020-12-23 16:59:40,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-12-23 16:59:40,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:59:40,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-12-23 16:59:40,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 16:59:40,956 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 72 states. [2020-12-23 16:59:41,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:59:41,086 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2020-12-23 16:59:41,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 16:59:41,086 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 90 [2020-12-23 16:59:41,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:59:41,087 INFO L225 Difference]: With dead ends: 92 [2020-12-23 16:59:41,087 INFO L226 Difference]: Without dead ends: 92 [2020-12-23 16:59:41,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1786 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 16:59:41,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-23 16:59:41,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-12-23 16:59:41,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 16:59:41,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2020-12-23 16:59:41,091 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 90 [2020-12-23 16:59:41,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:59:41,091 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2020-12-23 16:59:41,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-12-23 16:59:41,091 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2020-12-23 16:59:41,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-23 16:59:41,092 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:59:41,092 INFO L422 BasicCegarLoop]: trace histogram [34, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:59:41,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-23 16:59:41,303 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:59:41,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:59:41,304 INFO L82 PathProgramCache]: Analyzing trace with hash 131469362, now seen corresponding path program 20 times [2020-12-23 16:59:41,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:59:41,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121309170] [2020-12-23 16:59:41,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:59:41,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:59:42,494 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-23 16:59:42,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121309170] [2020-12-23 16:59:42,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170526813] [2020-12-23 16:59:42,495 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:59:42,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:59:42,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:59:42,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 16:59:42,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:59:44,341 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-23 16:59:44,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:59:44,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 74 [2020-12-23 16:59:44,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047211654] [2020-12-23 16:59:44,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-12-23 16:59:44,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:59:44,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-12-23 16:59:44,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2020-12-23 16:59:44,344 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 74 states. [2020-12-23 16:59:44,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:59:44,502 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2020-12-23 16:59:44,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 16:59:44,503 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 91 [2020-12-23 16:59:44,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:59:44,504 INFO L225 Difference]: With dead ends: 93 [2020-12-23 16:59:44,504 INFO L226 Difference]: Without dead ends: 93 [2020-12-23 16:59:44,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2020-12-23 16:59:44,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-23 16:59:44,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-12-23 16:59:44,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-23 16:59:44,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2020-12-23 16:59:44,507 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 91 [2020-12-23 16:59:44,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:59:44,507 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2020-12-23 16:59:44,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-12-23 16:59:44,508 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2020-12-23 16:59:44,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-23 16:59:44,508 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:59:44,508 INFO L422 BasicCegarLoop]: trace histogram [35, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:59:44,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-23 16:59:44,724 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:59:44,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:59:44,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1175292562, now seen corresponding path program 21 times [2020-12-23 16:59:44,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:59:44,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826102399] [2020-12-23 16:59:44,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:59:44,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:59:45,958 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-23 16:59:45,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826102399] [2020-12-23 16:59:45,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794589160] [2020-12-23 16:59:45,958 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:00:32,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2020-12-23 17:00:32,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:00:32,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 17:00:32,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:00:34,400 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-23 17:00:34,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:00:34,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 76 [2020-12-23 17:00:34,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167398600] [2020-12-23 17:00:34,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-12-23 17:00:34,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:00:34,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-12-23 17:00:34,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2020-12-23 17:00:34,403 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 76 states. [2020-12-23 17:00:34,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:00:34,499 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2020-12-23 17:00:34,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 17:00:34,499 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 92 [2020-12-23 17:00:34,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:00:34,500 INFO L225 Difference]: With dead ends: 94 [2020-12-23 17:00:34,500 INFO L226 Difference]: Without dead ends: 94 [2020-12-23 17:00:34,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1999 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2020-12-23 17:00:34,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-23 17:00:34,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-12-23 17:00:34,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-23 17:00:34,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2020-12-23 17:00:34,505 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 92 [2020-12-23 17:00:34,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:00:34,505 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2020-12-23 17:00:34,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-12-23 17:00:34,505 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2020-12-23 17:00:34,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-23 17:00:34,506 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:00:34,506 INFO L422 BasicCegarLoop]: trace histogram [36, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:00:34,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-23 17:00:34,720 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 17:00:34,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:00:34,721 INFO L82 PathProgramCache]: Analyzing trace with hash -825926606, now seen corresponding path program 22 times [2020-12-23 17:00:34,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:00:34,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799832694] [2020-12-23 17:00:34,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:00:34,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:00:36,004 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-23 17:00:36,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799832694] [2020-12-23 17:00:36,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410246559] [2020-12-23 17:00:36,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:00:43,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 17:00:43,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:00:43,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 17:00:43,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:00:45,292 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-23 17:00:45,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:00:45,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 78 [2020-12-23 17:00:45,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328875462] [2020-12-23 17:00:45,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-12-23 17:00:45,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:00:45,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-12-23 17:00:45,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2020-12-23 17:00:45,294 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand 78 states. [2020-12-23 17:00:45,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:00:45,459 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2020-12-23 17:00:45,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 17:00:45,459 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 93 [2020-12-23 17:00:45,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:00:45,460 INFO L225 Difference]: With dead ends: 95 [2020-12-23 17:00:45,460 INFO L226 Difference]: Without dead ends: 95 [2020-12-23 17:00:45,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2110 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2020-12-23 17:00:45,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-23 17:00:45,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-12-23 17:00:45,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-23 17:00:45,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2020-12-23 17:00:45,462 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 93 [2020-12-23 17:00:45,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:00:45,462 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2020-12-23 17:00:45,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-12-23 17:00:45,463 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2020-12-23 17:00:45,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-23 17:00:45,463 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:00:45,463 INFO L422 BasicCegarLoop]: trace histogram [37, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:00:45,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:00:45,672 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 17:00:45,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:00:45,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1560788626, now seen corresponding path program 23 times [2020-12-23 17:00:45,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:00:45,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502405052] [2020-12-23 17:00:45,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:00:45,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:00:47,012 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-23 17:00:47,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502405052] [2020-12-23 17:00:47,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994900172] [2020-12-23 17:00:47,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:00:52,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2020-12-23 17:00:52,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:00:52,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 17:00:52,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:00:54,780 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-23 17:00:54,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:00:54,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 80 [2020-12-23 17:00:54,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296519899] [2020-12-23 17:00:54,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-12-23 17:00:54,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:00:54,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-12-23 17:00:54,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2020-12-23 17:00:54,782 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 80 states. [2020-12-23 17:00:54,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:00:54,944 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2020-12-23 17:00:54,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 17:00:54,944 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 94 [2020-12-23 17:00:54,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:00:54,945 INFO L225 Difference]: With dead ends: 96 [2020-12-23 17:00:54,945 INFO L226 Difference]: Without dead ends: 96 [2020-12-23 17:00:54,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2224 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2020-12-23 17:00:54,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-23 17:00:54,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-12-23 17:00:54,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-23 17:00:54,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2020-12-23 17:00:54,947 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 94 [2020-12-23 17:00:54,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:00:54,947 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2020-12-23 17:00:54,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-12-23 17:00:54,947 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2020-12-23 17:00:54,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-23 17:00:54,948 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:00:54,948 INFO L422 BasicCegarLoop]: trace histogram [38, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:00:55,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-23 17:00:55,149 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 17:00:55,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:00:55,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1760450510, now seen corresponding path program 24 times [2020-12-23 17:00:55,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:00:55,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121050850] [2020-12-23 17:00:55,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:00:55,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:00:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-23 17:00:56,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121050850] [2020-12-23 17:00:56,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838876667] [2020-12-23 17:00:56,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true