/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/heap-manipulation/dancing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:12:56,462 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:12:56,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:12:56,501 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:12:56,502 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:12:56,504 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:12:56,506 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:12:56,509 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:12:56,511 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:12:56,513 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:12:56,514 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:12:56,516 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:12:56,518 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:12:56,520 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:12:56,524 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:12:56,525 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:12:56,526 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:12:56,527 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:12:56,535 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:12:56,552 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:12:56,569 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:12:56,571 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:12:56,576 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:12:56,581 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:12:56,586 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:12:56,608 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 06:12:56,612 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 06:12:56,613 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 06:12:56,614 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 06:12:56,616 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 06:12:56,616 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 06:12:56,620 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 06:12:56,621 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 06:12:56,621 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:12:56,622 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:12:56,623 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:12:56,624 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:12:56,669 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:12:56,670 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:12:56,674 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:12:56,674 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:12:56,674 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:12:56,674 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:12:56,675 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:12:56,675 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:12:56,675 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:12:56,675 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:12:56,676 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:12:56,677 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:12:56,677 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:12:56,677 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:12:56,677 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:12:56,677 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:12:56,678 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:12:56,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:12:56,678 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:12:56,678 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:12:56,678 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:12:56,679 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:12:56,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:12:56,679 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:12:56,679 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:12:56,679 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:12:57,134 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:12:57,168 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:12:57,171 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:12:57,173 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:12:57,173 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:12:57,175 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-manipulation/dancing.i [2020-12-23 06:12:57,265 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c9634826f/bee3ead933114cf79b05a762df006d4b/FLAGd0e6029eb [2020-12-23 06:12:57,964 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:12:57,965 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/heap-manipulation/dancing.i [2020-12-23 06:12:57,980 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c9634826f/bee3ead933114cf79b05a762df006d4b/FLAGd0e6029eb [2020-12-23 06:12:58,161 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c9634826f/bee3ead933114cf79b05a762df006d4b [2020-12-23 06:12:58,168 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:12:58,170 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:12:58,174 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:12:58,174 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:12:58,183 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:12:58,185 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:12:58" (1/1) ... [2020-12-23 06:12:58,187 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5036887a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:58, skipping insertion in model container [2020-12-23 06:12:58,188 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:12:58" (1/1) ... [2020-12-23 06:12:58,198 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:12:58,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:12:58,452 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/heap-manipulation/dancing.i[938,951] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[#t~mem6,],base],StructAccessExpression[IdentifierExpression[#t~mem6,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[#t~mem9,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[#t~mem9,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[#t~mem12,],base],StructAccessExpression[IdentifierExpression[#t~mem12,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[#t~mem14,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[#t~mem14,],offset]]]] left hand side expression in assignment: lhs: StructLHS[VariableLHS[~list~0,],L] left hand side expression in assignment: lhs: StructLHS[VariableLHS[~list~0,],R] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~n~0,],base],StructAccessExpression[IdentifierExpression[~n~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~n~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[~n~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~tail~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[~tail~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-23 06:12:58,669 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:12:58,685 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:12:58,705 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/heap-manipulation/dancing.i[938,951] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[#t~mem6,],base],StructAccessExpression[IdentifierExpression[#t~mem6,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[#t~mem9,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[#t~mem9,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[#t~mem12,],base],StructAccessExpression[IdentifierExpression[#t~mem12,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[#t~mem14,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[#t~mem14,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#list~0,],base],StructAccessExpression[IdentifierExpression[~#list~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#list~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[~#list~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~n~0,],base],StructAccessExpression[IdentifierExpression[~n~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~n~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[~n~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~tail~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[~tail~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-23 06:12:58,773 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:12:58,839 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:12:58,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:58 WrapperNode [2020-12-23 06:12:58,840 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:12:58,841 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:12:58,842 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:12:58,842 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:12:58,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:58" (1/1) ... [2020-12-23 06:12:58,907 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:58" (1/1) ... [2020-12-23 06:12:58,972 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:12:58,975 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:12:58,975 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:12:58,975 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:12:58,986 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:58" (1/1) ... [2020-12-23 06:12:58,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:58" (1/1) ... [2020-12-23 06:12:59,003 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:58" (1/1) ... [2020-12-23 06:12:59,006 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:58" (1/1) ... [2020-12-23 06:12:59,026 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:58" (1/1) ... [2020-12-23 06:12:59,037 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:58" (1/1) ... [2020-12-23 06:12:59,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:58" (1/1) ... [2020-12-23 06:12:59,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:12:59,054 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:12:59,054 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:12:59,054 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:12:59,056 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:58" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:12:59,174 INFO L130 BoogieDeclarations]: Found specification of procedure is_list_containing_x [2020-12-23 06:12:59,175 INFO L138 BoogieDeclarations]: Found implementation of procedure is_list_containing_x [2020-12-23 06:12:59,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-23 06:12:59,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-23 06:12:59,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:12:59,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-23 06:12:59,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 06:12:59,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:12:59,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:12:59,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:12:59,700 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:12:59,700 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2020-12-23 06:12:59,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:12:59 BoogieIcfgContainer [2020-12-23 06:12:59,702 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:12:59,704 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:12:59,704 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:12:59,708 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:12:59,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:12:58" (1/3) ... [2020-12-23 06:12:59,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e6bb4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:12:59, skipping insertion in model container [2020-12-23 06:12:59,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:12:58" (2/3) ... [2020-12-23 06:12:59,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e6bb4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:12:59, skipping insertion in model container [2020-12-23 06:12:59,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:12:59" (3/3) ... [2020-12-23 06:12:59,712 INFO L111 eAbstractionObserver]: Analyzing ICFG dancing.i [2020-12-23 06:12:59,718 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:12:59,724 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-23 06:12:59,743 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-23 06:12:59,770 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:12:59,770 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:12:59,770 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:12:59,771 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:12:59,771 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:12:59,771 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:12:59,771 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:12:59,771 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:12:59,788 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-12-23 06:12:59,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 06:12:59,795 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:12:59,796 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:12:59,796 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:12:59,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:12:59,803 INFO L82 PathProgramCache]: Analyzing trace with hash 206559279, now seen corresponding path program 1 times [2020-12-23 06:12:59,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:12:59,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299498740] [2020-12-23 06:12:59,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:12:59,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:12:59,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 06:13:00,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:13:00,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:13:00,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299498740] [2020-12-23 06:13:00,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:13:00,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 06:13:00,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501648363] [2020-12-23 06:13:00,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 06:13:00,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:13:00,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 06:13:00,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:13:00,042 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2020-12-23 06:13:00,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:13:00,071 INFO L93 Difference]: Finished difference Result 75 states and 103 transitions. [2020-12-23 06:13:00,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 06:13:00,073 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2020-12-23 06:13:00,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:13:00,082 INFO L225 Difference]: With dead ends: 75 [2020-12-23 06:13:00,082 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 06:13:00,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:13:00,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 06:13:00,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-23 06:13:00,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 06:13:00,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 48 transitions. [2020-12-23 06:13:00,133 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 48 transitions. Word has length 19 [2020-12-23 06:13:00,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:13:00,134 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 48 transitions. [2020-12-23 06:13:00,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 06:13:00,134 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 48 transitions. [2020-12-23 06:13:00,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 06:13:00,136 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:13:00,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:13:00,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:13:00,137 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:13:00,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:13:00,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1381750304, now seen corresponding path program 1 times [2020-12-23 06:13:00,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:13:00,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817749297] [2020-12-23 06:13:00,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:13:00,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:13:00,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 06:13:00,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:13:00,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:13:00,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817749297] [2020-12-23 06:13:00,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:13:00,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 06:13:00,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777437516] [2020-12-23 06:13:00,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 06:13:00,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:13:00,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 06:13:00,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 06:13:00,365 INFO L87 Difference]: Start difference. First operand 36 states and 48 transitions. Second operand 4 states. [2020-12-23 06:13:00,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:13:00,417 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2020-12-23 06:13:00,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:13:00,418 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-12-23 06:13:00,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:13:00,420 INFO L225 Difference]: With dead ends: 41 [2020-12-23 06:13:00,420 INFO L226 Difference]: Without dead ends: 39 [2020-12-23 06:13:00,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 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 06:13:00,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-23 06:13:00,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-12-23 06:13:00,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 06:13:00,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 50 transitions. [2020-12-23 06:13:00,431 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 50 transitions. Word has length 19 [2020-12-23 06:13:00,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:13:00,433 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 50 transitions. [2020-12-23 06:13:00,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 06:13:00,433 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 50 transitions. [2020-12-23 06:13:00,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 06:13:00,435 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:13:00,435 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:13:00,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 06:13:00,435 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:13:00,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:13:00,436 INFO L82 PathProgramCache]: Analyzing trace with hash -226254050, now seen corresponding path program 1 times [2020-12-23 06:13:00,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:13:00,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834480066] [2020-12-23 06:13:00,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:13:00,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:13:00,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 06:13:00,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:13:00,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-12-23 06:13:00,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:13:00,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 06:13:00,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834480066] [2020-12-23 06:13:00,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:13:00,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 06:13:00,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786255205] [2020-12-23 06:13:00,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 06:13:00,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:13:00,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 06:13:00,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 06:13:00,636 INFO L87 Difference]: Start difference. First operand 38 states and 50 transitions. Second operand 4 states. [2020-12-23 06:13:00,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:13:00,733 INFO L93 Difference]: Finished difference Result 84 states and 110 transitions. [2020-12-23 06:13:00,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:13:00,733 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-12-23 06:13:00,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:13:00,735 INFO L225 Difference]: With dead ends: 84 [2020-12-23 06:13:00,736 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 06:13:00,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 06:13:00,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 06:13:00,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 50. [2020-12-23 06:13:00,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 06:13:00,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 68 transitions. [2020-12-23 06:13:00,748 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 68 transitions. Word has length 25 [2020-12-23 06:13:00,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:13:00,748 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 68 transitions. [2020-12-23 06:13:00,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 06:13:00,749 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 68 transitions. [2020-12-23 06:13:00,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 06:13:00,751 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:13:00,751 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-23 06:13:00,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 06:13:00,752 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:13:00,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:13:00,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1609419466, now seen corresponding path program 1 times [2020-12-23 06:13:00,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:13:00,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914508322] [2020-12-23 06:13:00,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:13:00,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:13:00,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-23 06:13:00,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:13:00,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-12-23 06:13:00,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:13:00,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:13:00,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914508322] [2020-12-23 06:13:00,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386773887] [2020-12-23 06:13:00,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:13:01,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:13:01,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 06:13:01,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:13:01,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:13:01,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:13:01,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-12-23 06:13:01,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242903442] [2020-12-23 06:13:01,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 06:13:01,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:13:01,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 06:13:01,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:13:01,257 INFO L87 Difference]: Start difference. First operand 50 states and 68 transitions. Second operand 12 states. [2020-12-23 06:13:01,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:13:01,647 INFO L93 Difference]: Finished difference Result 116 states and 157 transitions. [2020-12-23 06:13:01,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 06:13:01,648 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-12-23 06:13:01,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:13:01,652 INFO L225 Difference]: With dead ends: 116 [2020-12-23 06:13:01,652 INFO L226 Difference]: Without dead ends: 84 [2020-12-23 06:13:01,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:13:01,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-23 06:13:01,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 59. [2020-12-23 06:13:01,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 06:13:01,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 82 transitions. [2020-12-23 06:13:01,668 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 82 transitions. Word has length 28 [2020-12-23 06:13:01,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:13:01,669 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 82 transitions. [2020-12-23 06:13:01,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 06:13:01,669 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 82 transitions. [2020-12-23 06:13:01,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 06:13:01,671 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:13:01,671 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-23 06:13:01,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:13:01,887 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:13:01,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:13:01,889 INFO L82 PathProgramCache]: Analyzing trace with hash -348378523, now seen corresponding path program 1 times [2020-12-23 06:13:01,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:13:01,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620979133] [2020-12-23 06:13:01,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:13:01,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:13:02,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 06:13:02,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:13:02,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-12-23 06:13:02,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:13:02,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 06:13:02,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620979133] [2020-12-23 06:13:02,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:13:02,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 06:13:02,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538611252] [2020-12-23 06:13:02,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 06:13:02,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:13:02,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 06:13:02,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:13:02,141 INFO L87 Difference]: Start difference. First operand 59 states and 82 transitions. Second operand 6 states. [2020-12-23 06:13:02,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:13:02,306 INFO L93 Difference]: Finished difference Result 103 states and 140 transitions. [2020-12-23 06:13:02,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:13:02,307 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-12-23 06:13:02,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:13:02,309 INFO L225 Difference]: With dead ends: 103 [2020-12-23 06:13:02,309 INFO L226 Difference]: Without dead ends: 81 [2020-12-23 06:13:02,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:13:02,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-23 06:13:02,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 68. [2020-12-23 06:13:02,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-23 06:13:02,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 96 transitions. [2020-12-23 06:13:02,322 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 96 transitions. Word has length 30 [2020-12-23 06:13:02,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:13:02,322 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 96 transitions. [2020-12-23 06:13:02,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 06:13:02,322 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 96 transitions. [2020-12-23 06:13:02,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 06:13:02,324 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:13:02,324 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-23 06:13:02,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 06:13:02,325 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:13:02,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:13:02,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1936726425, now seen corresponding path program 1 times [2020-12-23 06:13:02,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:13:02,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824257064] [2020-12-23 06:13:02,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:13:02,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:13:02,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 06:13:02,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:13:02,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-12-23 06:13:02,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:13:02,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 06:13:02,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824257064] [2020-12-23 06:13:02,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:13:02,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 06:13:02,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955251170] [2020-12-23 06:13:02,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:13:02,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:13:02,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:13:02,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:13:02,462 INFO L87 Difference]: Start difference. First operand 68 states and 96 transitions. Second operand 5 states. [2020-12-23 06:13:02,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:13:02,511 INFO L93 Difference]: Finished difference Result 72 states and 99 transitions. [2020-12-23 06:13:02,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:13:02,512 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-23 06:13:02,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:13:02,516 INFO L225 Difference]: With dead ends: 72 [2020-12-23 06:13:02,516 INFO L226 Difference]: Without dead ends: 68 [2020-12-23 06:13:02,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:13:02,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-23 06:13:02,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2020-12-23 06:13:02,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-23 06:13:02,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 85 transitions. [2020-12-23 06:13:02,544 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 85 transitions. Word has length 30 [2020-12-23 06:13:02,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:13:02,544 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 85 transitions. [2020-12-23 06:13:02,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:13:02,545 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 85 transitions. [2020-12-23 06:13:02,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 06:13:02,553 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:13:02,553 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:13:02,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 06:13:02,554 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:13:02,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:13:02,555 INFO L82 PathProgramCache]: Analyzing trace with hash -829447446, now seen corresponding path program 1 times [2020-12-23 06:13:02,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:13:02,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227521518] [2020-12-23 06:13:02,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:13:02,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:13:02,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-23 06:13:02,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:13:02,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-12-23 06:13:02,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:13:02,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 06:13:02,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227521518] [2020-12-23 06:13:02,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:13:02,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 06:13:02,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778346209] [2020-12-23 06:13:02,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 06:13:02,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:13:02,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 06:13:02,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:13:02,689 INFO L87 Difference]: Start difference. First operand 61 states and 85 transitions. Second operand 6 states. [2020-12-23 06:13:02,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:13:02,773 INFO L93 Difference]: Finished difference Result 70 states and 99 transitions. [2020-12-23 06:13:02,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 06:13:02,773 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-12-23 06:13:02,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:13:02,777 INFO L225 Difference]: With dead ends: 70 [2020-12-23 06:13:02,777 INFO L226 Difference]: Without dead ends: 68 [2020-12-23 06:13:02,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:13:02,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-23 06:13:02,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2020-12-23 06:13:02,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 06:13:02,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 93 transitions. [2020-12-23 06:13:02,804 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 93 transitions. Word has length 30 [2020-12-23 06:13:02,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:13:02,805 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 93 transitions. [2020-12-23 06:13:02,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 06:13:02,805 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 93 transitions. [2020-12-23 06:13:02,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 06:13:02,807 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:13:02,807 INFO L422 BasicCegarLoop]: trace histogram [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 06:13:02,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 06:13:02,809 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:13:02,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:13:02,810 INFO L82 PathProgramCache]: Analyzing trace with hash 945306828, now seen corresponding path program 1 times [2020-12-23 06:13:02,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:13:02,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998987836] [2020-12-23 06:13:02,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:13:02,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:13:02,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 06:13:02,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:13:02,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-12-23 06:13:02,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:13:02,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:13:02,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998987836] [2020-12-23 06:13:02,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:13:02,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 06:13:02,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934199203] [2020-12-23 06:13:02,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:13:02,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:13:02,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:13:02,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:13:02,896 INFO L87 Difference]: Start difference. First operand 64 states and 93 transitions. Second operand 5 states. [2020-12-23 06:13:02,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:13:02,982 INFO L93 Difference]: Finished difference Result 107 states and 148 transitions. [2020-12-23 06:13:02,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:13:02,983 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-12-23 06:13:02,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:13:02,984 INFO L225 Difference]: With dead ends: 107 [2020-12-23 06:13:02,984 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 06:13:02,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:13:02,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 06:13:02,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-12-23 06:13:02,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 06:13:02,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2020-12-23 06:13:02,991 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 31 [2020-12-23 06:13:02,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:13:02,992 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2020-12-23 06:13:02,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:13:02,992 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2020-12-23 06:13:02,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 06:13:02,993 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:13:02,993 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-12-23 06:13:02,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-23 06:13:02,993 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:13:02,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:13:02,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1429407123, now seen corresponding path program 1 times [2020-12-23 06:13:02,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:13:02,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508386764] [2020-12-23 06:13:02,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:13:03,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:13:03,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-23 06:13:03,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:13:03,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-12-23 06:13:03,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:13:03,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 06:13:03,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:13:03,066 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 06:13:03,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508386764] [2020-12-23 06:13:03,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711205955] [2020-12-23 06:13:03,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:13:03,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:13:03,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 06:13:03,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:13:03,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:13:03,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:13:03,307 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 26 [2020-12-23 06:13:03,311 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:13:03,334 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:13:03,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:13:03,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:13:03,345 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 26 [2020-12-23 06:13:03,346 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 06:13:03,370 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:13:03,374 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:13:03,374 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:87, output treesize:65 [2020-12-23 06:13:03,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:13:03,635 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:13:03,636 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 69 [2020-12-23 06:13:03,641 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-23 06:13:03,649 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 06:13:03,663 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:13:03,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:13:03,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:13:03,670 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 15 [2020-12-23 06:13:03,673 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 06:13:03,681 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:13:03,684 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:13:03,684 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:83, output treesize:10 [2020-12-23 06:13:03,729 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 06:13:03,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:13:03,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 11 [2020-12-23 06:13:03,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526180382] [2020-12-23 06:13:03,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 06:13:03,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:13:03,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 06:13:03,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:13:03,732 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand 11 states. [2020-12-23 06:13:09,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:13:09,164 INFO L93 Difference]: Finished difference Result 207 states and 274 transitions. [2020-12-23 06:13:09,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 06:13:09,165 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-12-23 06:13:09,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:13:09,170 INFO L225 Difference]: With dead ends: 207 [2020-12-23 06:13:09,170 INFO L226 Difference]: Without dead ends: 164 [2020-12-23 06:13:09,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2020-12-23 06:13:09,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-12-23 06:13:09,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 80. [2020-12-23 06:13:09,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-23 06:13:09,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 109 transitions. [2020-12-23 06:13:09,209 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 109 transitions. Word has length 36 [2020-12-23 06:13:09,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:13:09,210 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 109 transitions. [2020-12-23 06:13:09,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 06:13:09,210 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 109 transitions. [2020-12-23 06:13:09,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 06:13:09,212 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:13:09,212 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-12-23 06:13:09,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:13:09,426 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:13:09,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:13:09,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1907149286, now seen corresponding path program 1 times [2020-12-23 06:13:09,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:13:09,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032095195] [2020-12-23 06:13:09,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:13:09,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:13:09,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-12-23 06:13:09,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:13:09,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 06:13:09,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:13:09,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-12-23 06:13:09,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:13:09,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-23 06:13:09,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:13:09,630 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-23 06:13:09,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032095195] [2020-12-23 06:13:09,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70292420] [2020-12-23 06:13:09,631 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 06:13:09,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:13:09,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-23 06:13:09,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:13:09,779 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 06:13:09,780 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:13:09,788 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:13:09,789 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:13:09,790 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:18 [2020-12-23 06:13:09,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:13:09,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:13:09,829 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 26 [2020-12-23 06:13:09,830 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:13:09,849 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:13:09,851 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:13:09,851 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:43 [2020-12-23 06:13:10,004 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:13:10,010 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-12-23 06:13:10,012 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:13:10,016 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:13:10,031 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:13:10,032 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:13:10,032 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:42 [2020-12-23 06:13:10,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:13:10,338 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-12-23 06:13:10,340 INFO L348 Elim1Store]: treesize reduction 28, result has 87.0 percent of original size [2020-12-23 06:13:10,340 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 95 treesize of output 214 [2020-12-23 06:13:10,349 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[12, 3, 2, 1] term [2020-12-23 06:13:10,350 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 12 disjuncts [2020-12-23 06:13:10,355 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:13:10,415 INFO L625 ElimStorePlain]: treesize reduction 58, result has 57.7 percent of original size [2020-12-23 06:13:10,418 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:13:10,420 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:13:10,423 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 06:13:10,424 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:102, output treesize:106 [2020-12-23 06:13:10,425 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:13:10,427 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:13:10,500 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:13:10,502 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:13:10,583 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:13:10,585 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:13:10,660 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:13:10,662 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:13:10,664 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:13:10,667 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 06:13:13,477 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-12-23 06:13:13,508 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 1] term [2020-12-23 06:13:13,509 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:13:13,908 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 68 [2020-12-23 06:13:13,973 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:13:13,974 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:13:14,010 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 9 treesize of output 3 [2020-12-23 06:13:14,012 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:13:14,022 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 9 treesize of output 3 [2020-12-23 06:13:14,023 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 06:13:14,474 WARN L197 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2020-12-23 06:13:14,475 INFO L625 ElimStorePlain]: treesize reduction 56, result has 91.5 percent of original size [2020-12-23 06:13:14,485 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 9 treesize of output 3 [2020-12-23 06:13:14,486 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-12-23 06:13:14,495 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 9 treesize of output 3 [2020-12-23 06:13:14,496 INFO L547 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-12-23 06:13:14,713 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-12-23 06:13:14,715 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:13:14,729 INFO L547 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 2 dim-2 vars, End of recursive call: 16 dim-0 vars, and 4 xjuncts. [2020-12-23 06:13:14,730 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 13 variables, input treesize:677, output treesize:585 [2020-12-23 06:13:14,897 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:13:14,899 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:13:14,974 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:13:14,975 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:13:15,048 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:13:15,049 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:13:24,200 WARN L197 SmtUtils]: Spent 9.06 s on a formula simplification that was a NOOP. DAG size: 42 [2020-12-23 06:13:24,315 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 5, 1] term [2020-12-23 06:13:24,315 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:13:24,325 INFO L443 ElimStorePlain]: Different costs {10=[v_prenex_30], 18=[|#memory_$Pointer$.base|]} [2020-12-23 06:13:24,387 INFO L348 Elim1Store]: treesize reduction 14, result has 79.1 percent of original size [2020-12-23 06:13:24,387 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 84 [2020-12-23 06:13:24,392 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:13:24,415 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:13:24,562 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-12-23 06:13:24,563 INFO L348 Elim1Store]: treesize reduction 10, result has 91.7 percent of original size [2020-12-23 06:13:24,565 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 86 treesize of output 142 [2020-12-23 06:13:24,570 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 6 disjuncts [2020-12-23 06:13:24,571 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-12-23 06:13:24,572 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-12-23 06:13:24,573 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-12-23 06:13:24,574 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-23 06:13:24,577 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-23 06:13:24,578 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 06:13:24,584 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 06:13:24,595 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:13:24,600 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:13:24,600 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:171, output treesize:4 [2020-12-23 06:13:24,675 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 06:13:24,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:13:24,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 24 [2020-12-23 06:13:24,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840924524] [2020-12-23 06:13:24,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 06:13:24,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:13:24,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 06:13:24,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:13:24,678 INFO L87 Difference]: Start difference. First operand 80 states and 109 transitions. Second operand 24 states. [2020-12-23 06:13:30,685 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 37 [2020-12-23 06:13:36,879 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2020-12-23 06:13:38,840 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2020-12-23 06:13:55,196 WARN L197 SmtUtils]: Spent 10.22 s on a formula simplification. DAG size of input: 94 DAG size of output: 68 [2020-12-23 06:14:11,256 WARN L197 SmtUtils]: Spent 10.22 s on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2020-12-23 06:14:19,479 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2020-12-23 06:14:25,925 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2020-12-23 06:14:26,391 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2020-12-23 06:14:28,581 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-12-23 06:14:28,866 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 67 [2020-12-23 06:14:29,320 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-12-23 06:14:39,572 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 42 [2020-12-23 06:14:47,814 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2020-12-23 06:14:50,037 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2020-12-23 06:14:50,347 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2020-12-23 06:14:50,530 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-12-23 06:15:00,811 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2020-12-23 06:15:09,069 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2020-12-23 06:15:09,252 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-12-23 06:15:11,475 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-12-23 06:15:15,754 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2020-12-23 06:15:21,366 WARN L197 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 74 [2020-12-23 06:15:21,727 WARN L197 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 67 [2020-12-23 06:15:48,518 WARN L197 SmtUtils]: Spent 26.41 s on a formula simplification. DAG size of input: 115 DAG size of output: 95 [2020-12-23 06:16:12,953 WARN L197 SmtUtils]: Spent 24.34 s on a formula simplification. DAG size of input: 107 DAG size of output: 87 [2020-12-23 06:16:33,371 WARN L197 SmtUtils]: Spent 10.29 s on a formula simplification. DAG size of input: 99 DAG size of output: 73 [2020-12-23 06:16:51,861 WARN L197 SmtUtils]: Spent 10.34 s on a formula simplification. DAG size of input: 95 DAG size of output: 78 [2020-12-23 06:17:30,798 WARN L197 SmtUtils]: Spent 34.67 s on a formula simplification. DAG size of input: 117 DAG size of output: 105