/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/array-tiling/pr5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:34:56,966 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:34:56,969 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:34:57,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:34:57,006 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:34:57,007 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:34:57,009 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:34:57,012 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:34:57,026 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:34:57,027 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:34:57,029 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:34:57,030 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:34:57,031 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:34:57,032 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:34:57,033 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:34:57,034 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:34:57,036 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:34:57,037 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:34:57,039 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:34:57,041 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:34:57,043 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:34:57,045 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:34:57,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:34:57,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:34:57,051 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 00:34:57,051 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 00:34:57,051 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 00:34:57,052 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 00:34:57,053 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 00:34:57,054 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 00:34:57,055 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 00:34:57,056 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 00:34:57,056 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 00:34:57,057 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 00:34:57,059 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 00:34:57,059 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 00:34:57,060 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 00:34:57,060 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 00:34:57,061 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:34:57,062 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:34:57,063 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:34:57,064 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 00:34:57,104 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:34:57,104 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:34:57,106 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:34:57,108 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:34:57,108 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:34:57,108 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:34:57,109 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:34:57,109 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:34:57,110 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:34:57,110 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:34:57,110 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:34:57,110 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:34:57,110 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:34:57,111 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:34:57,111 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:34:57,112 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:34:57,112 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:34:57,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:34:57,113 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:34:57,113 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:34:57,113 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:34:57,113 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:34:57,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:34:57,113 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:34:57,114 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:34:57,114 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:34:57,543 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:34:57,582 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:34:57,585 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:34:57,587 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:34:57,588 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:34:57,589 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pr5.c [2020-12-23 00:34:57,681 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e8763f8e6/8a8a5d7cad68403c8a7e5e5bb62e311d/FLAGd7f60e70d [2020-12-23 00:34:58,354 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:34:58,355 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-tiling/pr5.c [2020-12-23 00:34:58,364 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e8763f8e6/8a8a5d7cad68403c8a7e5e5bb62e311d/FLAGd7f60e70d [2020-12-23 00:34:58,728 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e8763f8e6/8a8a5d7cad68403c8a7e5e5bb62e311d [2020-12-23 00:34:58,731 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:34:58,734 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:34:58,735 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:34:58,736 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:34:58,740 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:34:58,740 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:34:58" (1/1) ... [2020-12-23 00:34:58,742 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d21c5eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:34:58, skipping insertion in model container [2020-12-23 00:34:58,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:34:58" (1/1) ... [2020-12-23 00:34:58,751 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:34:58,770 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:34:58,929 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/array-tiling/pr5.c[394,407] left hand side expression in assignment: lhs: VariableLHS[~CELLCOUNT~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~volArray~0,],[BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[5],IdentifierExpression[~i~0,]],IntegerLiteral[5]]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~volArray~0,],[BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[5],IdentifierExpression[~i~0,]],IntegerLiteral[5]]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~volArray~0,],[BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[5],IdentifierExpression[~i~0,]],IntegerLiteral[4]]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~volArray~0,],[BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[5],IdentifierExpression[~i~0,]],IntegerLiteral[4]]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~volArray~0,],[BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[5],IdentifierExpression[~i~0,]],IntegerLiteral[3]]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~volArray~0,],[BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[5],IdentifierExpression[~i~0,]],IntegerLiteral[3]]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~volArray~0,],[BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[5],IdentifierExpression[~i~0,]],IntegerLiteral[2]]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~volArray~0,],[BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[5],IdentifierExpression[~i~0,]],IntegerLiteral[2]]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~volArray~0,],[BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[5],IdentifierExpression[~i~0,]],IntegerLiteral[1]]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~volArray~0,],[BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[5],IdentifierExpression[~i~0,]],IntegerLiteral[1]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:34:58,961 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:34:58,971 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:34:58,987 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/array-tiling/pr5.c[394,407] left hand side expression in assignment: lhs: VariableLHS[~CELLCOUNT~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#volArray~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#volArray~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[5],IdentifierExpression[~i~0,]],IntegerLiteral[5]]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#volArray~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#volArray~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[5],IdentifierExpression[~i~0,]],IntegerLiteral[5]]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#volArray~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#volArray~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[5],IdentifierExpression[~i~0,]],IntegerLiteral[4]]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#volArray~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#volArray~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[5],IdentifierExpression[~i~0,]],IntegerLiteral[4]]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#volArray~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#volArray~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[5],IdentifierExpression[~i~0,]],IntegerLiteral[3]]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#volArray~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#volArray~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[5],IdentifierExpression[~i~0,]],IntegerLiteral[3]]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#volArray~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#volArray~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[5],IdentifierExpression[~i~0,]],IntegerLiteral[2]]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#volArray~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#volArray~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[5],IdentifierExpression[~i~0,]],IntegerLiteral[2]]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#volArray~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#volArray~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[5],IdentifierExpression[~i~0,]],IntegerLiteral[1]]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#volArray~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#volArray~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMUL,IntegerLiteral[5],IdentifierExpression[~i~0,]],IntegerLiteral[1]]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:34:59,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:34:59,044 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:34:59,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:34:59 WrapperNode [2020-12-23 00:34:59,045 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:34:59,046 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:34:59,046 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:34:59,047 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:34:59,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:34:59" (1/1) ... [2020-12-23 00:34:59,085 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:34:59" (1/1) ... [2020-12-23 00:34:59,134 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:34:59,138 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:34:59,138 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:34:59,139 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:34:59,152 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:34:59" (1/1) ... [2020-12-23 00:34:59,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:34:59" (1/1) ... [2020-12-23 00:34:59,170 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:34:59" (1/1) ... [2020-12-23 00:34:59,171 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:34:59" (1/1) ... [2020-12-23 00:34:59,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:34:59" (1/1) ... [2020-12-23 00:34:59,199 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:34:59" (1/1) ... [2020-12-23 00:34:59,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:34:59" (1/1) ... [2020-12-23 00:34:59,212 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:34:59,214 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:34:59,214 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:34:59,214 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:34:59,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:34:59" (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 00:34:59,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:34:59,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:34:59,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:34:59,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:34:59,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:34:59,374 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:34:59,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:34:59,999 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:35:00,000 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-23 00:35:00,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:35:00 BoogieIcfgContainer [2020-12-23 00:35:00,004 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:35:00,008 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:35:00,009 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:35:00,014 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:35:00,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:34:58" (1/3) ... [2020-12-23 00:35:00,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33869699 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:35:00, skipping insertion in model container [2020-12-23 00:35:00,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:34:59" (2/3) ... [2020-12-23 00:35:00,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33869699 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:35:00, skipping insertion in model container [2020-12-23 00:35:00,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:35:00" (3/3) ... [2020-12-23 00:35:00,020 INFO L111 eAbstractionObserver]: Analyzing ICFG pr5.c [2020-12-23 00:35:00,028 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:35:00,034 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:35:00,057 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:35:00,106 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:35:00,108 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:35:00,108 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:35:00,109 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:35:00,109 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:35:00,109 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:35:00,109 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:35:00,109 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:35:00,129 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-12-23 00:35:00,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 00:35:00,137 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:00,138 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:00,138 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:00,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:00,146 INFO L82 PathProgramCache]: Analyzing trace with hash -50963655, now seen corresponding path program 1 times [2020-12-23 00:35:00,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:00,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062038960] [2020-12-23 00:35:00,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:00,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:00,441 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 00:35:00,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062038960] [2020-12-23 00:35:00,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:35:00,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:35:00,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740424109] [2020-12-23 00:35:00,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:35:00,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:00,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:35:00,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:35:00,477 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-12-23 00:35:00,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:00,497 INFO L93 Difference]: Finished difference Result 49 states and 72 transitions. [2020-12-23 00:35:00,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:35:00,498 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2020-12-23 00:35:00,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:00,508 INFO L225 Difference]: With dead ends: 49 [2020-12-23 00:35:00,508 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 00:35:00,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:35:00,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 00:35:00,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-23 00:35:00,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 00:35:00,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2020-12-23 00:35:00,550 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 13 [2020-12-23 00:35:00,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:00,550 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2020-12-23 00:35:00,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:35:00,550 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2020-12-23 00:35:00,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 00:35:00,551 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:00,551 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:00,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:35:00,552 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:00,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:00,553 INFO L82 PathProgramCache]: Analyzing trace with hash 629094715, now seen corresponding path program 1 times [2020-12-23 00:35:00,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:00,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452450286] [2020-12-23 00:35:00,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:00,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:00,675 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 00:35:00,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452450286] [2020-12-23 00:35:00,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:35:00,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:35:00,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103054123] [2020-12-23 00:35:00,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:35:00,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:00,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:35:00,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:35:00,682 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand 4 states. [2020-12-23 00:35:00,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:00,759 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2020-12-23 00:35:00,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:35:00,761 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-23 00:35:00,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:00,762 INFO L225 Difference]: With dead ends: 31 [2020-12-23 00:35:00,762 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 00:35:00,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 00:35:00,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 00:35:00,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2020-12-23 00:35:00,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 00:35:00,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2020-12-23 00:35:00,773 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 13 [2020-12-23 00:35:00,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:00,773 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2020-12-23 00:35:00,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:35:00,774 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2020-12-23 00:35:00,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 00:35:00,775 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:00,777 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:00,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 00:35:00,777 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:00,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:00,779 INFO L82 PathProgramCache]: Analyzing trace with hash 629154297, now seen corresponding path program 1 times [2020-12-23 00:35:00,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:00,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450826624] [2020-12-23 00:35:00,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:00,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:00,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:00,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450826624] [2020-12-23 00:35:00,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:35:00,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 00:35:00,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573238213] [2020-12-23 00:35:00,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:35:00,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:00,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:35:00,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:35:00,973 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand 5 states. [2020-12-23 00:35:01,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:01,084 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2020-12-23 00:35:01,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:35:01,084 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-23 00:35:01,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:01,085 INFO L225 Difference]: With dead ends: 42 [2020-12-23 00:35:01,086 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 00:35:01,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:35:01,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 00:35:01,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2020-12-23 00:35:01,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 00:35:01,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2020-12-23 00:35:01,092 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 13 [2020-12-23 00:35:01,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:01,093 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2020-12-23 00:35:01,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:35:01,093 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2020-12-23 00:35:01,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 00:35:01,094 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:01,094 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:01,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 00:35:01,095 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:01,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:01,095 INFO L82 PathProgramCache]: Analyzing trace with hash 314139906, now seen corresponding path program 1 times [2020-12-23 00:35:01,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:01,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641515004] [2020-12-23 00:35:01,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:01,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:01,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:01,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641515004] [2020-12-23 00:35:01,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:35:01,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:35:01,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058555144] [2020-12-23 00:35:01,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:35:01,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:01,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:35:01,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:35:01,259 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand 4 states. [2020-12-23 00:35:01,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:01,416 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2020-12-23 00:35:01,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:35:01,417 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-12-23 00:35:01,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:01,418 INFO L225 Difference]: With dead ends: 61 [2020-12-23 00:35:01,419 INFO L226 Difference]: Without dead ends: 43 [2020-12-23 00:35:01,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 00:35:01,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-23 00:35:01,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2020-12-23 00:35:01,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 00:35:01,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 44 transitions. [2020-12-23 00:35:01,440 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 44 transitions. Word has length 20 [2020-12-23 00:35:01,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:01,440 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 44 transitions. [2020-12-23 00:35:01,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:35:01,440 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 44 transitions. [2020-12-23 00:35:01,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 00:35:01,442 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:01,442 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:01,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 00:35:01,443 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:01,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:01,444 INFO L82 PathProgramCache]: Analyzing trace with hash 994198276, now seen corresponding path program 1 times [2020-12-23 00:35:01,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:01,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759651525] [2020-12-23 00:35:01,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:01,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:01,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:01,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759651525] [2020-12-23 00:35:01,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:35:01,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:35:01,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073544193] [2020-12-23 00:35:01,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:35:01,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:01,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:35:01,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:35:01,585 INFO L87 Difference]: Start difference. First operand 32 states and 44 transitions. Second operand 4 states. [2020-12-23 00:35:01,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:01,697 INFO L93 Difference]: Finished difference Result 75 states and 105 transitions. [2020-12-23 00:35:01,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:35:01,698 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-12-23 00:35:01,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:01,700 INFO L225 Difference]: With dead ends: 75 [2020-12-23 00:35:01,701 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 00:35:01,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 00:35:01,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 00:35:01,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2020-12-23 00:35:01,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 00:35:01,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 67 transitions. [2020-12-23 00:35:01,729 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 67 transitions. Word has length 20 [2020-12-23 00:35:01,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:01,729 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 67 transitions. [2020-12-23 00:35:01,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:35:01,730 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 67 transitions. [2020-12-23 00:35:01,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 00:35:01,733 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:01,733 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:01,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 00:35:01,733 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:01,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:01,734 INFO L82 PathProgramCache]: Analyzing trace with hash 707166916, now seen corresponding path program 1 times [2020-12-23 00:35:01,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:01,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591207069] [2020-12-23 00:35:01,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:01,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:02,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:02,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591207069] [2020-12-23 00:35:02,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357785520] [2020-12-23 00:35:02,178 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 00:35:02,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:02,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 00:35:02,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:35:02,396 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:35:02,397 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:02,409 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:02,412 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:02,413 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2020-12-23 00:35:02,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:35:02,467 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2020-12-23 00:35:02,469 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:02,481 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:02,484 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:02,484 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:19 [2020-12-23 00:35:02,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:35:02,501 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2020-12-23 00:35:02,505 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:02,516 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:02,520 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:02,521 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:19 [2020-12-23 00:35:02,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:35:02,537 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2020-12-23 00:35:02,539 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:02,550 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:02,556 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:02,556 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:19 [2020-12-23 00:35:02,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:35:02,572 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 00:35:02,576 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:02,584 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:02,588 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:02,588 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:11 [2020-12-23 00:35:02,659 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:35:02,667 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:35:02,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:02,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:35:02,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2020-12-23 00:35:02,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939459844] [2020-12-23 00:35:02,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 00:35:02,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:02,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 00:35:02,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:35:02,693 INFO L87 Difference]: Start difference. First operand 46 states and 67 transitions. Second operand 15 states. [2020-12-23 00:35:03,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:03,576 INFO L93 Difference]: Finished difference Result 151 states and 202 transitions. [2020-12-23 00:35:03,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 00:35:03,577 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2020-12-23 00:35:03,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:03,580 INFO L225 Difference]: With dead ends: 151 [2020-12-23 00:35:03,580 INFO L226 Difference]: Without dead ends: 133 [2020-12-23 00:35:03,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=208, Invalid=604, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:35:03,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-23 00:35:03,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 68. [2020-12-23 00:35:03,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-23 00:35:03,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 101 transitions. [2020-12-23 00:35:03,596 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 101 transitions. Word has length 20 [2020-12-23 00:35:03,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:03,596 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 101 transitions. [2020-12-23 00:35:03,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 00:35:03,597 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 101 transitions. [2020-12-23 00:35:03,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 00:35:03,598 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:03,598 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:03,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 00:35:03,812 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:03,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:03,814 INFO L82 PathProgramCache]: Analyzing trace with hash 407392262, now seen corresponding path program 1 times [2020-12-23 00:35:03,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:03,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156520713] [2020-12-23 00:35:03,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:03,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:04,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:04,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156520713] [2020-12-23 00:35:04,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322828213] [2020-12-23 00:35:04,027 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 00:35:04,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:04,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 00:35:04,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:35:04,105 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:35:04,156 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:35:04,159 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:04,165 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:04,168 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:04,168 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2020-12-23 00:35:04,199 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2020-12-23 00:35:04,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:35:04,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:35:04,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:35:04,230 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 28 [2020-12-23 00:35:04,236 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:04,243 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:04,244 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:04,254 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:04,257 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:04,258 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:47, output treesize:23 [2020-12-23 00:35:04,284 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2020-12-23 00:35:04,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:35:04,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:35:04,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:35:04,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:35:04,298 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 28 [2020-12-23 00:35:04,301 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:04,307 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:04,307 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:04,316 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:04,318 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:04,318 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:47, output treesize:23 [2020-12-23 00:35:04,349 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2020-12-23 00:35:04,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:35:04,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:35:04,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:35:04,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:35:04,366 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 28 [2020-12-23 00:35:04,368 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:04,373 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:04,374 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:04,383 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:04,385 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:04,388 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:47, output treesize:35 [2020-12-23 00:35:04,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:35:04,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:35:04,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:35:04,431 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:04,432 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 55 [2020-12-23 00:35:04,437 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:04,458 INFO L625 ElimStorePlain]: treesize reduction 5, result has 91.2 percent of original size [2020-12-23 00:35:04,459 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:04,460 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:61, output treesize:52 [2020-12-23 00:35:04,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:04,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:35:04,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-12-23 00:35:04,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866303106] [2020-12-23 00:35:04,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 00:35:04,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:04,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 00:35:04,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:35:04,582 INFO L87 Difference]: Start difference. First operand 68 states and 101 transitions. Second operand 14 states. [2020-12-23 00:35:06,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:06,066 INFO L93 Difference]: Finished difference Result 169 states and 226 transitions. [2020-12-23 00:35:06,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 00:35:06,066 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 20 [2020-12-23 00:35:06,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:06,068 INFO L225 Difference]: With dead ends: 169 [2020-12-23 00:35:06,069 INFO L226 Difference]: Without dead ends: 167 [2020-12-23 00:35:06,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 12 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=508, Invalid=1748, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 00:35:06,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-12-23 00:35:06,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 71. [2020-12-23 00:35:06,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-23 00:35:06,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 105 transitions. [2020-12-23 00:35:06,083 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 105 transitions. Word has length 20 [2020-12-23 00:35:06,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:06,084 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 105 transitions. [2020-12-23 00:35:06,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 00:35:06,084 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 105 transitions. [2020-12-23 00:35:06,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 00:35:06,085 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:06,085 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] [2020-12-23 00:35:06,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:06,300 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:06,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:06,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1616202537, now seen corresponding path program 1 times [2020-12-23 00:35:06,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:06,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15177788] [2020-12-23 00:35:06,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:06,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:06,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:06,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15177788] [2020-12-23 00:35:06,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517497465] [2020-12-23 00:35:06,680 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 00:35:06,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:06,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 00:35:06,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:35:06,879 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:35:06,880 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:06,888 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:06,891 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:06,891 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2020-12-23 00:35:06,935 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-23 00:35:06,936 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2020-12-23 00:35:06,938 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:06,947 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:06,951 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:06,951 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:19 [2020-12-23 00:35:06,971 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-23 00:35:06,972 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2020-12-23 00:35:06,976 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:06,985 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:06,987 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:06,987 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:19 [2020-12-23 00:35:07,005 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2020-12-23 00:35:07,006 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 00:35:07,008 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:07,014 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:07,016 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:07,017 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2020-12-23 00:35:07,119 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:35:07,122 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:35:07,125 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:35:07,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:07,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:35:07,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2020-12-23 00:35:07,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886148625] [2020-12-23 00:35:07,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 00:35:07,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:07,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 00:35:07,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:35:07,152 INFO L87 Difference]: Start difference. First operand 71 states and 105 transitions. Second operand 17 states. [2020-12-23 00:35:08,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:08,281 INFO L93 Difference]: Finished difference Result 264 states and 374 transitions. [2020-12-23 00:35:08,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 00:35:08,281 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2020-12-23 00:35:08,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:08,283 INFO L225 Difference]: With dead ends: 264 [2020-12-23 00:35:08,284 INFO L226 Difference]: Without dead ends: 202 [2020-12-23 00:35:08,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=246, Invalid=876, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:35:08,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-12-23 00:35:08,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 117. [2020-12-23 00:35:08,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-23 00:35:08,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 171 transitions. [2020-12-23 00:35:08,328 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 171 transitions. Word has length 26 [2020-12-23 00:35:08,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:08,329 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 171 transitions. [2020-12-23 00:35:08,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 00:35:08,331 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 171 transitions. [2020-12-23 00:35:08,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 00:35:08,333 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:08,333 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] [2020-12-23 00:35:08,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:08,550 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:08,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:08,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1311111015, now seen corresponding path program 1 times [2020-12-23 00:35:08,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:08,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260117831] [2020-12-23 00:35:08,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:08,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:08,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:08,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260117831] [2020-12-23 00:35:08,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054140220] [2020-12-23 00:35:08,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:08,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:08,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 00:35:08,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:35:08,905 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:35:08,907 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:08,915 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:08,916 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:08,917 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2020-12-23 00:35:08,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:35:08,952 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2020-12-23 00:35:08,955 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:08,966 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:08,969 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:08,969 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:22 [2020-12-23 00:35:08,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:35:08,981 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2020-12-23 00:35:08,982 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:08,993 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:08,995 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:08,995 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:22 [2020-12-23 00:35:09,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:35:09,008 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2020-12-23 00:35:09,010 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:09,025 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:09,026 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:09,026 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2020-12-23 00:35:09,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:35:09,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:35:09,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:35:09,067 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:09,068 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2020-12-23 00:35:09,070 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:09,085 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:09,086 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:09,087 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2020-12-23 00:35:09,154 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:35:09,158 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:35:09,160 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:35:09,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 00:35:09,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:35:09,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-23 00:35:09,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729401988] [2020-12-23 00:35:09,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 00:35:09,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:09,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 00:35:09,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:35:09,183 INFO L87 Difference]: Start difference. First operand 117 states and 171 transitions. Second operand 16 states. [2020-12-23 00:35:10,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:10,623 INFO L93 Difference]: Finished difference Result 274 states and 372 transitions. [2020-12-23 00:35:10,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 00:35:10,624 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 26 [2020-12-23 00:35:10,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:10,625 INFO L225 Difference]: With dead ends: 274 [2020-12-23 00:35:10,626 INFO L226 Difference]: Without dead ends: 264 [2020-12-23 00:35:10,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=332, Invalid=1228, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:35:10,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-12-23 00:35:10,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 167. [2020-12-23 00:35:10,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-12-23 00:35:10,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 253 transitions. [2020-12-23 00:35:10,647 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 253 transitions. Word has length 26 [2020-12-23 00:35:10,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:10,647 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 253 transitions. [2020-12-23 00:35:10,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 00:35:10,647 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 253 transitions. [2020-12-23 00:35:10,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 00:35:10,649 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:10,649 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] [2020-12-23 00:35:10,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:10,865 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:10,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:10,866 INFO L82 PathProgramCache]: Analyzing trace with hash 596684565, now seen corresponding path program 1 times [2020-12-23 00:35:10,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:10,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49275366] [2020-12-23 00:35:10,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:10,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:11,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:11,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49275366] [2020-12-23 00:35:11,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747137995] [2020-12-23 00:35:11,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:11,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:11,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 00:35:11,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:35:11,136 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:35:11,169 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:35:11,170 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:11,175 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:11,175 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:11,176 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2020-12-23 00:35:11,208 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-23 00:35:11,208 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2020-12-23 00:35:11,212 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:11,224 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:11,225 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:11,226 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:16 [2020-12-23 00:35:11,240 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-23 00:35:11,241 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2020-12-23 00:35:11,244 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:11,250 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:11,251 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:11,251 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2020-12-23 00:35:11,294 INFO L348 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2020-12-23 00:35:11,300 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2020-12-23 00:35:11,302 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:11,309 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:11,310 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:11,310 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2020-12-23 00:35:11,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:11,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:35:11,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2020-12-23 00:35:11,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343774809] [2020-12-23 00:35:11,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 00:35:11,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:11,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 00:35:11,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:35:11,428 INFO L87 Difference]: Start difference. First operand 167 states and 253 transitions. Second operand 18 states. [2020-12-23 00:35:13,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:13,285 INFO L93 Difference]: Finished difference Result 312 states and 438 transitions. [2020-12-23 00:35:13,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 00:35:13,285 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-12-23 00:35:13,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:13,289 INFO L225 Difference]: With dead ends: 312 [2020-12-23 00:35:13,289 INFO L226 Difference]: Without dead ends: 310 [2020-12-23 00:35:13,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=609, Invalid=2147, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 00:35:13,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-12-23 00:35:13,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 217. [2020-12-23 00:35:13,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-12-23 00:35:13,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 331 transitions. [2020-12-23 00:35:13,310 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 331 transitions. Word has length 26 [2020-12-23 00:35:13,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:13,310 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 331 transitions. [2020-12-23 00:35:13,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 00:35:13,311 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 331 transitions. [2020-12-23 00:35:13,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 00:35:13,313 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:13,313 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:13,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 00:35:13,528 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:13,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:13,529 INFO L82 PathProgramCache]: Analyzing trace with hash 793542745, now seen corresponding path program 1 times [2020-12-23 00:35:13,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:13,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116864441] [2020-12-23 00:35:13,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:13,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:13,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:13,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116864441] [2020-12-23 00:35:13,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:35:13,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:35:13,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116289140] [2020-12-23 00:35:13,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:35:13,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:13,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:35:13,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:35:13,567 INFO L87 Difference]: Start difference. First operand 217 states and 331 transitions. Second operand 3 states. [2020-12-23 00:35:13,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:13,615 INFO L93 Difference]: Finished difference Result 328 states and 484 transitions. [2020-12-23 00:35:13,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:35:13,616 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-12-23 00:35:13,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:13,618 INFO L225 Difference]: With dead ends: 328 [2020-12-23 00:35:13,618 INFO L226 Difference]: Without dead ends: 239 [2020-12-23 00:35:13,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:35:13,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-12-23 00:35:13,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 217. [2020-12-23 00:35:13,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-12-23 00:35:13,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 322 transitions. [2020-12-23 00:35:13,645 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 322 transitions. Word has length 27 [2020-12-23 00:35:13,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:13,645 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 322 transitions. [2020-12-23 00:35:13,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:35:13,645 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 322 transitions. [2020-12-23 00:35:13,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 00:35:13,647 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:13,647 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:13,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-23 00:35:13,647 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:13,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:13,648 INFO L82 PathProgramCache]: Analyzing trace with hash -345589223, now seen corresponding path program 1 times [2020-12-23 00:35:13,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:13,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317896781] [2020-12-23 00:35:13,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:13,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:13,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:13,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317896781] [2020-12-23 00:35:13,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:35:13,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:35:13,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113319397] [2020-12-23 00:35:13,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:35:13,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:13,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:35:13,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:35:13,709 INFO L87 Difference]: Start difference. First operand 217 states and 322 transitions. Second operand 3 states. [2020-12-23 00:35:13,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:13,751 INFO L93 Difference]: Finished difference Result 255 states and 363 transitions. [2020-12-23 00:35:13,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:35:13,752 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-12-23 00:35:13,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:13,753 INFO L225 Difference]: With dead ends: 255 [2020-12-23 00:35:13,754 INFO L226 Difference]: Without dead ends: 166 [2020-12-23 00:35:13,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:35:13,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-12-23 00:35:13,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 150. [2020-12-23 00:35:13,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-23 00:35:13,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 214 transitions. [2020-12-23 00:35:13,768 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 214 transitions. Word has length 27 [2020-12-23 00:35:13,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:13,769 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 214 transitions. [2020-12-23 00:35:13,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:35:13,769 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 214 transitions. [2020-12-23 00:35:13,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 00:35:13,773 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:13,773 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:13,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-23 00:35:13,773 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:13,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:13,774 INFO L82 PathProgramCache]: Analyzing trace with hash -958935894, now seen corresponding path program 2 times [2020-12-23 00:35:13,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:13,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25643591] [2020-12-23 00:35:13,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:13,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:13,979 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:13,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25643591] [2020-12-23 00:35:13,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735466336] [2020-12-23 00:35:13,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:14,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:35:14,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:35:14,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 00:35:14,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:35:14,108 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:35:14,109 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:14,118 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:14,119 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:14,119 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2020-12-23 00:35:14,164 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-23 00:35:14,168 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2020-12-23 00:35:14,170 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:14,179 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:14,180 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:14,181 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:19 [2020-12-23 00:35:14,206 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2020-12-23 00:35:14,209 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 00:35:14,210 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:14,219 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:14,220 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:14,220 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:28 [2020-12-23 00:35:14,425 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:35:14,428 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:35:14,480 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:14,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:35:14,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2020-12-23 00:35:14,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236114473] [2020-12-23 00:35:14,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 00:35:14,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:14,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 00:35:14,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:35:14,484 INFO L87 Difference]: Start difference. First operand 150 states and 214 transitions. Second operand 21 states. [2020-12-23 00:35:15,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:15,404 INFO L93 Difference]: Finished difference Result 398 states and 536 transitions. [2020-12-23 00:35:15,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 00:35:15,405 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 32 [2020-12-23 00:35:15,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:15,407 INFO L225 Difference]: With dead ends: 398 [2020-12-23 00:35:15,407 INFO L226 Difference]: Without dead ends: 311 [2020-12-23 00:35:15,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 00:35:15,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-12-23 00:35:15,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 212. [2020-12-23 00:35:15,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-12-23 00:35:15,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 292 transitions. [2020-12-23 00:35:15,428 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 292 transitions. Word has length 32 [2020-12-23 00:35:15,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:15,428 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 292 transitions. [2020-12-23 00:35:15,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 00:35:15,428 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 292 transitions. [2020-12-23 00:35:15,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 00:35:15,429 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:15,430 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:15,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:15,646 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:15,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:15,647 INFO L82 PathProgramCache]: Analyzing trace with hash -536234068, now seen corresponding path program 1 times [2020-12-23 00:35:15,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:15,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14892897] [2020-12-23 00:35:15,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:15,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:15,837 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:15,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14892897] [2020-12-23 00:35:15,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459010160] [2020-12-23 00:35:15,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:15,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:15,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 00:35:15,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:35:15,969 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:35:15,971 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:15,979 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:15,980 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:15,980 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2020-12-23 00:35:16,018 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-23 00:35:16,018 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2020-12-23 00:35:16,020 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:16,029 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:16,030 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:16,031 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:19 [2020-12-23 00:35:16,046 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2020-12-23 00:35:16,046 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 00:35:16,047 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:16,053 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:16,054 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:16,054 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2020-12-23 00:35:16,228 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:35:16,232 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:35:16,235 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:35:16,246 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:16,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:35:16,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-12-23 00:35:16,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414561983] [2020-12-23 00:35:16,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 00:35:16,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:16,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 00:35:16,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:35:16,248 INFO L87 Difference]: Start difference. First operand 212 states and 292 transitions. Second operand 19 states. [2020-12-23 00:35:17,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:17,287 INFO L93 Difference]: Finished difference Result 367 states and 465 transitions. [2020-12-23 00:35:17,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 00:35:17,290 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2020-12-23 00:35:17,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:17,292 INFO L225 Difference]: With dead ends: 367 [2020-12-23 00:35:17,293 INFO L226 Difference]: Without dead ends: 332 [2020-12-23 00:35:17,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=278, Invalid=1128, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 00:35:17,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-12-23 00:35:17,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 219. [2020-12-23 00:35:17,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-12-23 00:35:17,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 300 transitions. [2020-12-23 00:35:17,313 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 300 transitions. Word has length 32 [2020-12-23 00:35:17,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:17,313 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 300 transitions. [2020-12-23 00:35:17,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 00:35:17,314 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 300 transitions. [2020-12-23 00:35:17,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 00:35:17,315 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:17,315 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:17,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 00:35:17,529 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:17,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:17,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1197899094, now seen corresponding path program 2 times [2020-12-23 00:35:17,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:17,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715148402] [2020-12-23 00:35:17,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:17,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:17,701 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:17,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715148402] [2020-12-23 00:35:17,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64088612] [2020-12-23 00:35:17,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:17,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:35:17,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:35:17,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 00:35:17,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:35:17,862 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:35:17,863 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:17,880 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:17,882 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:17,882 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2020-12-23 00:35:17,924 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-23 00:35:17,925 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2020-12-23 00:35:17,926 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:17,936 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:17,937 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:17,938 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2020-12-23 00:35:17,995 INFO L348 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2020-12-23 00:35:17,996 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2020-12-23 00:35:17,997 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:18,006 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:18,007 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:18,007 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2020-12-23 00:35:18,178 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:35:18,181 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:35:18,183 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:35:18,196 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:18,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:35:18,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2020-12-23 00:35:18,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230544011] [2020-12-23 00:35:18,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 00:35:18,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:18,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 00:35:18,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:35:18,198 INFO L87 Difference]: Start difference. First operand 219 states and 300 transitions. Second operand 20 states. [2020-12-23 00:35:19,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:19,326 INFO L93 Difference]: Finished difference Result 504 states and 656 transitions. [2020-12-23 00:35:19,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 00:35:19,327 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 32 [2020-12-23 00:35:19,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:19,329 INFO L225 Difference]: With dead ends: 504 [2020-12-23 00:35:19,330 INFO L226 Difference]: Without dead ends: 418 [2020-12-23 00:35:19,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=306, Invalid=1254, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:35:19,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-12-23 00:35:19,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 244. [2020-12-23 00:35:19,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-12-23 00:35:19,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 330 transitions. [2020-12-23 00:35:19,353 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 330 transitions. Word has length 32 [2020-12-23 00:35:19,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:19,353 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 330 transitions. [2020-12-23 00:35:19,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 00:35:19,354 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 330 transitions. [2020-12-23 00:35:19,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 00:35:19,354 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:19,355 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:19,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 00:35:19,570 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:19,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:19,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1331912600, now seen corresponding path program 1 times [2020-12-23 00:35:19,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:19,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367386862] [2020-12-23 00:35:19,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:19,671 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:19,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367386862] [2020-12-23 00:35:19,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664441397] [2020-12-23 00:35:19,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:19,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:19,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 00:35:19,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:35:19,760 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:35:19,761 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:19,767 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:19,769 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:19,769 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2020-12-23 00:35:19,781 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2020-12-23 00:35:19,799 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-23 00:35:19,800 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 61 [2020-12-23 00:35:19,803 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:19,808 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:19,808 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:19,817 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:19,818 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:19,818 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:40, output treesize:28 [2020-12-23 00:35:19,870 INFO L348 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2020-12-23 00:35:19,870 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2020-12-23 00:35:19,874 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:19,881 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:19,883 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:19,884 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2020-12-23 00:35:20,025 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:35:20,028 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:35:20,039 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:20,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:35:20,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2020-12-23 00:35:20,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886958727] [2020-12-23 00:35:20,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 00:35:20,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:20,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 00:35:20,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:35:20,041 INFO L87 Difference]: Start difference. First operand 244 states and 330 transitions. Second operand 14 states. [2020-12-23 00:35:20,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:20,887 INFO L93 Difference]: Finished difference Result 608 states and 783 transitions. [2020-12-23 00:35:20,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 00:35:20,888 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-12-23 00:35:20,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:20,891 INFO L225 Difference]: With dead ends: 608 [2020-12-23 00:35:20,891 INFO L226 Difference]: Without dead ends: 598 [2020-12-23 00:35:20,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2020-12-23 00:35:20,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2020-12-23 00:35:20,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 307. [2020-12-23 00:35:20,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-12-23 00:35:20,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 431 transitions. [2020-12-23 00:35:20,926 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 431 transitions. Word has length 32 [2020-12-23 00:35:20,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:20,927 INFO L481 AbstractCegarLoop]: Abstraction has 307 states and 431 transitions. [2020-12-23 00:35:20,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 00:35:20,927 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 431 transitions. [2020-12-23 00:35:20,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 00:35:20,929 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:20,929 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:21,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 00:35:21,144 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:21,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:21,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1157616362, now seen corresponding path program 1 times [2020-12-23 00:35:21,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:21,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053902578] [2020-12-23 00:35:21,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:21,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:21,272 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:21,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053902578] [2020-12-23 00:35:21,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42498172] [2020-12-23 00:35:21,273 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:21,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:21,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 00:35:21,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:35:21,350 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:35:21,350 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:21,355 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:21,357 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:21,358 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2020-12-23 00:35:21,370 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2020-12-23 00:35:21,389 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-23 00:35:21,390 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 57 [2020-12-23 00:35:21,391 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:21,396 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:21,397 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:21,406 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:21,407 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:21,407 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:40, output treesize:28 [2020-12-23 00:35:21,460 INFO L348 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2020-12-23 00:35:21,460 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2020-12-23 00:35:21,462 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:21,468 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:21,469 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:21,469 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2020-12-23 00:35:21,701 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:21,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:35:21,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 18 [2020-12-23 00:35:21,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040498043] [2020-12-23 00:35:21,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 00:35:21,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:21,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 00:35:21,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:35:21,703 INFO L87 Difference]: Start difference. First operand 307 states and 431 transitions. Second operand 18 states. [2020-12-23 00:35:23,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:23,563 INFO L93 Difference]: Finished difference Result 726 states and 977 transitions. [2020-12-23 00:35:23,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-23 00:35:23,564 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 32 [2020-12-23 00:35:23,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:23,568 INFO L225 Difference]: With dead ends: 726 [2020-12-23 00:35:23,568 INFO L226 Difference]: Without dead ends: 724 [2020-12-23 00:35:23,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=714, Invalid=3446, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 00:35:23,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2020-12-23 00:35:23,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 420. [2020-12-23 00:35:23,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2020-12-23 00:35:23,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 593 transitions. [2020-12-23 00:35:23,609 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 593 transitions. Word has length 32 [2020-12-23 00:35:23,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:23,609 INFO L481 AbstractCegarLoop]: Abstraction has 420 states and 593 transitions. [2020-12-23 00:35:23,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 00:35:23,609 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 593 transitions. [2020-12-23 00:35:23,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 00:35:23,610 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:23,611 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:23,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 00:35:23,825 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:23,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:23,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1212579368, now seen corresponding path program 1 times [2020-12-23 00:35:23,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:23,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252313268] [2020-12-23 00:35:23,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:23,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:23,852 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:35:23,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252313268] [2020-12-23 00:35:23,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:35:23,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:35:23,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860198573] [2020-12-23 00:35:23,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:35:23,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:23,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:35:23,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:35:23,854 INFO L87 Difference]: Start difference. First operand 420 states and 593 transitions. Second operand 3 states. [2020-12-23 00:35:23,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:23,913 INFO L93 Difference]: Finished difference Result 610 states and 846 transitions. [2020-12-23 00:35:23,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:35:23,914 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-12-23 00:35:23,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:23,916 INFO L225 Difference]: With dead ends: 610 [2020-12-23 00:35:23,916 INFO L226 Difference]: Without dead ends: 440 [2020-12-23 00:35:23,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:35:23,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2020-12-23 00:35:23,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 404. [2020-12-23 00:35:23,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 404 states. [2020-12-23 00:35:23,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 552 transitions. [2020-12-23 00:35:23,950 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 552 transitions. Word has length 33 [2020-12-23 00:35:23,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:23,950 INFO L481 AbstractCegarLoop]: Abstraction has 404 states and 552 transitions. [2020-12-23 00:35:23,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:35:23,950 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 552 transitions. [2020-12-23 00:35:23,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 00:35:23,951 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:23,952 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:23,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-23 00:35:23,952 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:23,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:23,952 INFO L82 PathProgramCache]: Analyzing trace with hash -947694612, now seen corresponding path program 2 times [2020-12-23 00:35:23,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:23,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068160542] [2020-12-23 00:35:23,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:23,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:23,976 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:35:23,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068160542] [2020-12-23 00:35:23,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:35:23,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:35:23,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61498864] [2020-12-23 00:35:23,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:35:23,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:23,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:35:23,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:35:23,978 INFO L87 Difference]: Start difference. First operand 404 states and 552 transitions. Second operand 3 states. [2020-12-23 00:35:24,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:24,027 INFO L93 Difference]: Finished difference Result 456 states and 610 transitions. [2020-12-23 00:35:24,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:35:24,028 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-12-23 00:35:24,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:24,030 INFO L225 Difference]: With dead ends: 456 [2020-12-23 00:35:24,030 INFO L226 Difference]: Without dead ends: 299 [2020-12-23 00:35:24,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:35:24,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-12-23 00:35:24,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 281. [2020-12-23 00:35:24,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-12-23 00:35:24,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 370 transitions. [2020-12-23 00:35:24,055 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 370 transitions. Word has length 33 [2020-12-23 00:35:24,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:24,055 INFO L481 AbstractCegarLoop]: Abstraction has 281 states and 370 transitions. [2020-12-23 00:35:24,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:35:24,055 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 370 transitions. [2020-12-23 00:35:24,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 00:35:24,056 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:24,057 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:24,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-23 00:35:24,057 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:24,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:24,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1633319485, now seen corresponding path program 3 times [2020-12-23 00:35:24,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:24,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309795930] [2020-12-23 00:35:24,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:24,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:24,400 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:24,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309795930] [2020-12-23 00:35:24,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074566362] [2020-12-23 00:35:24,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:24,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 00:35:24,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:35:24,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 00:35:24,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:35:24,568 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:35:24,569 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:24,577 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:24,578 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:24,579 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2020-12-23 00:35:24,618 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2020-12-23 00:35:24,619 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 00:35:24,620 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:24,627 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:24,628 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:24,628 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2020-12-23 00:35:24,831 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:35:24,835 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:35:24,895 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:24,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:35:24,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-12-23 00:35:24,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125683301] [2020-12-23 00:35:24,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 00:35:24,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:24,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 00:35:24,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:35:24,897 INFO L87 Difference]: Start difference. First operand 281 states and 370 transitions. Second operand 20 states. [2020-12-23 00:35:26,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:26,251 INFO L93 Difference]: Finished difference Result 562 states and 709 transitions. [2020-12-23 00:35:26,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 00:35:26,251 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2020-12-23 00:35:26,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:26,254 INFO L225 Difference]: With dead ends: 562 [2020-12-23 00:35:26,254 INFO L226 Difference]: Without dead ends: 508 [2020-12-23 00:35:26,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:35:26,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2020-12-23 00:35:26,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 337. [2020-12-23 00:35:26,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-12-23 00:35:26,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 438 transitions. [2020-12-23 00:35:26,289 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 438 transitions. Word has length 38 [2020-12-23 00:35:26,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:26,289 INFO L481 AbstractCegarLoop]: Abstraction has 337 states and 438 transitions. [2020-12-23 00:35:26,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 00:35:26,289 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 438 transitions. [2020-12-23 00:35:26,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 00:35:26,291 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:26,291 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:26,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:26,507 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:26,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:26,507 INFO L82 PathProgramCache]: Analyzing trace with hash -738419777, now seen corresponding path program 2 times [2020-12-23 00:35:26,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:26,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561703628] [2020-12-23 00:35:26,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:26,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:26,762 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:26,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561703628] [2020-12-23 00:35:26,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591979303] [2020-12-23 00:35:26,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:26,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:35:26,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:35:26,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 00:35:26,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:35:26,913 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:35:26,914 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:26,926 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:26,928 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:26,928 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:22 [2020-12-23 00:35:26,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:35:26,974 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 00:35:26,975 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:26,984 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:26,985 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:26,985 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:25 [2020-12-23 00:35:27,196 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:35:27,198 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:35:27,200 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:35:27,230 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:27,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:35:27,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2020-12-23 00:35:27,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489397502] [2020-12-23 00:35:27,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 00:35:27,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:27,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 00:35:27,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:35:27,232 INFO L87 Difference]: Start difference. First operand 337 states and 438 transitions. Second operand 21 states. [2020-12-23 00:35:28,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:28,858 INFO L93 Difference]: Finished difference Result 576 states and 698 transitions. [2020-12-23 00:35:28,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 00:35:28,858 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 38 [2020-12-23 00:35:28,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:28,861 INFO L225 Difference]: With dead ends: 576 [2020-12-23 00:35:28,861 INFO L226 Difference]: Without dead ends: 566 [2020-12-23 00:35:28,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=336, Invalid=1556, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 00:35:28,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2020-12-23 00:35:28,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 371. [2020-12-23 00:35:28,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2020-12-23 00:35:28,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 482 transitions. [2020-12-23 00:35:28,903 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 482 transitions. Word has length 38 [2020-12-23 00:35:28,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:28,903 INFO L481 AbstractCegarLoop]: Abstraction has 371 states and 482 transitions. [2020-12-23 00:35:28,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 00:35:28,903 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 482 transitions. [2020-12-23 00:35:28,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 00:35:28,904 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:28,905 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:29,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:29,120 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:29,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:29,121 INFO L82 PathProgramCache]: Analyzing trace with hash -327438275, now seen corresponding path program 3 times [2020-12-23 00:35:29,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:29,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629518808] [2020-12-23 00:35:29,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:29,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:29,330 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:29,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629518808] [2020-12-23 00:35:29,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155058501] [2020-12-23 00:35:29,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:29,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 00:35:29,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:35:29,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 00:35:29,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:35:29,483 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:35:29,484 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:29,489 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:29,490 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:29,490 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2020-12-23 00:35:29,519 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2020-12-23 00:35:29,520 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 00:35:29,521 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:29,526 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:29,526 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:29,527 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-12-23 00:35:29,700 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:29,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:35:29,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2020-12-23 00:35:29,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689278610] [2020-12-23 00:35:29,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 00:35:29,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:29,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 00:35:29,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:35:29,702 INFO L87 Difference]: Start difference. First operand 371 states and 482 transitions. Second operand 19 states. [2020-12-23 00:35:31,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:31,558 INFO L93 Difference]: Finished difference Result 788 states and 970 transitions. [2020-12-23 00:35:31,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 00:35:31,559 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 38 [2020-12-23 00:35:31,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:31,563 INFO L225 Difference]: With dead ends: 788 [2020-12-23 00:35:31,564 INFO L226 Difference]: Without dead ends: 786 [2020-12-23 00:35:31,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=458, Invalid=1894, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 00:35:31,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2020-12-23 00:35:31,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 502. [2020-12-23 00:35:31,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 502 states. [2020-12-23 00:35:31,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 655 transitions. [2020-12-23 00:35:31,622 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 655 transitions. Word has length 38 [2020-12-23 00:35:31,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:31,622 INFO L481 AbstractCegarLoop]: Abstraction has 502 states and 655 transitions. [2020-12-23 00:35:31,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 00:35:31,622 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 655 transitions. [2020-12-23 00:35:31,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 00:35:31,623 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:31,623 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:31,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 00:35:31,838 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:31,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:31,839 INFO L82 PathProgramCache]: Analyzing trace with hash -36819903, now seen corresponding path program 1 times [2020-12-23 00:35:31,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:31,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220755505] [2020-12-23 00:35:31,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:31,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:32,038 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:32,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220755505] [2020-12-23 00:35:32,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764734988] [2020-12-23 00:35:32,039 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:32,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:32,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 00:35:32,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:35:32,122 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:35:32,123 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:32,132 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:32,133 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:32,133 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:23 [2020-12-23 00:35:32,148 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 44 [2020-12-23 00:35:32,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:35:32,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:35:32,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:35:32,156 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 36 [2020-12-23 00:35:32,158 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:32,163 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:32,164 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:32,181 INFO L625 ElimStorePlain]: treesize reduction 5, result has 87.8 percent of original size [2020-12-23 00:35:32,182 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:32,183 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:57, output treesize:36 [2020-12-23 00:35:32,376 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:35:32,378 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:35:32,408 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:32,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:35:32,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2020-12-23 00:35:32,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296925212] [2020-12-23 00:35:32,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 00:35:32,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:32,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 00:35:32,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:35:32,410 INFO L87 Difference]: Start difference. First operand 502 states and 655 transitions. Second operand 16 states. [2020-12-23 00:35:33,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:33,652 INFO L93 Difference]: Finished difference Result 1132 states and 1411 transitions. [2020-12-23 00:35:33,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 00:35:33,652 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-12-23 00:35:33,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:33,657 INFO L225 Difference]: With dead ends: 1132 [2020-12-23 00:35:33,657 INFO L226 Difference]: Without dead ends: 1122 [2020-12-23 00:35:33,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2020-12-23 00:35:33,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2020-12-23 00:35:33,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 603. [2020-12-23 00:35:33,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2020-12-23 00:35:33,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 808 transitions. [2020-12-23 00:35:33,722 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 808 transitions. Word has length 38 [2020-12-23 00:35:33,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:33,722 INFO L481 AbstractCegarLoop]: Abstraction has 603 states and 808 transitions. [2020-12-23 00:35:33,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 00:35:33,722 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 808 transitions. [2020-12-23 00:35:33,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 00:35:33,724 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:33,724 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:33,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:33,940 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:33,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:33,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1462641983, now seen corresponding path program 1 times [2020-12-23 00:35:33,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:33,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108265659] [2020-12-23 00:35:33,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:33,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:33,967 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-23 00:35:33,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108265659] [2020-12-23 00:35:33,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:35:33,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:35:33,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721138333] [2020-12-23 00:35:33,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:35:33,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:33,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:35:33,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:35:33,969 INFO L87 Difference]: Start difference. First operand 603 states and 808 transitions. Second operand 3 states. [2020-12-23 00:35:34,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:34,059 INFO L93 Difference]: Finished difference Result 908 states and 1202 transitions. [2020-12-23 00:35:34,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:35:34,060 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2020-12-23 00:35:34,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:34,063 INFO L225 Difference]: With dead ends: 908 [2020-12-23 00:35:34,063 INFO L226 Difference]: Without dead ends: 598 [2020-12-23 00:35:34,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:35:34,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2020-12-23 00:35:34,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 523. [2020-12-23 00:35:34,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 523 states. [2020-12-23 00:35:34,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 672 transitions. [2020-12-23 00:35:34,117 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 672 transitions. Word has length 39 [2020-12-23 00:35:34,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:34,117 INFO L481 AbstractCegarLoop]: Abstraction has 523 states and 672 transitions. [2020-12-23 00:35:34,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:35:34,118 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 672 transitions. [2020-12-23 00:35:34,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 00:35:34,119 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:34,119 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:34,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-23 00:35:34,119 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:34,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:34,120 INFO L82 PathProgramCache]: Analyzing trace with hash -568751811, now seen corresponding path program 1 times [2020-12-23 00:35:34,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:34,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375969853] [2020-12-23 00:35:34,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:34,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:34,143 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-23 00:35:34,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375969853] [2020-12-23 00:35:34,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:35:34,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:35:34,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436980494] [2020-12-23 00:35:34,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:35:34,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:34,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:35:34,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:35:34,144 INFO L87 Difference]: Start difference. First operand 523 states and 672 transitions. Second operand 3 states. [2020-12-23 00:35:34,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:34,202 INFO L93 Difference]: Finished difference Result 599 states and 758 transitions. [2020-12-23 00:35:34,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:35:34,203 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2020-12-23 00:35:34,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:34,204 INFO L225 Difference]: With dead ends: 599 [2020-12-23 00:35:34,204 INFO L226 Difference]: Without dead ends: 443 [2020-12-23 00:35:34,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:35:34,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2020-12-23 00:35:34,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 413. [2020-12-23 00:35:34,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413 states. [2020-12-23 00:35:34,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 518 transitions. [2020-12-23 00:35:34,246 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 518 transitions. Word has length 39 [2020-12-23 00:35:34,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:34,246 INFO L481 AbstractCegarLoop]: Abstraction has 413 states and 518 transitions. [2020-12-23 00:35:34,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:35:34,247 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 518 transitions. [2020-12-23 00:35:34,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 00:35:34,248 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:34,248 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:34,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-23 00:35:34,248 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:34,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:34,249 INFO L82 PathProgramCache]: Analyzing trace with hash -2003079792, now seen corresponding path program 4 times [2020-12-23 00:35:34,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:34,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759207385] [2020-12-23 00:35:34,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:34,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:34,410 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:34,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759207385] [2020-12-23 00:35:34,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385237980] [2020-12-23 00:35:34,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:34,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:35:34,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:35:34,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 00:35:34,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:35:34,491 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-23 00:35:34,492 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:34,498 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:34,499 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:34,499 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2020-12-23 00:35:34,624 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:35:34,626 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:35:34,671 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:34,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:35:34,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2020-12-23 00:35:34,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127688855] [2020-12-23 00:35:34,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 00:35:34,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:34,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 00:35:34,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:35:34,673 INFO L87 Difference]: Start difference. First operand 413 states and 518 transitions. Second operand 16 states. [2020-12-23 00:35:35,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:35,740 INFO L93 Difference]: Finished difference Result 653 states and 779 transitions. [2020-12-23 00:35:35,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 00:35:35,740 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2020-12-23 00:35:35,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:35,743 INFO L225 Difference]: With dead ends: 653 [2020-12-23 00:35:35,743 INFO L226 Difference]: Without dead ends: 643 [2020-12-23 00:35:35,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:35:35,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2020-12-23 00:35:35,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 437. [2020-12-23 00:35:35,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2020-12-23 00:35:35,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 545 transitions. [2020-12-23 00:35:35,792 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 545 transitions. Word has length 44 [2020-12-23 00:35:35,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:35,792 INFO L481 AbstractCegarLoop]: Abstraction has 437 states and 545 transitions. [2020-12-23 00:35:35,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 00:35:35,793 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 545 transitions. [2020-12-23 00:35:35,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 00:35:35,794 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:35,794 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:36,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 00:35:36,008 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:36,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:36,009 INFO L82 PathProgramCache]: Analyzing trace with hash -2075466350, now seen corresponding path program 3 times [2020-12-23 00:35:36,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:36,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184769446] [2020-12-23 00:35:36,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:36,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:36,140 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:36,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184769446] [2020-12-23 00:35:36,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658554575] [2020-12-23 00:35:36,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:36,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 00:35:36,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:35:36,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 00:35:36,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:35:36,254 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-23 00:35:36,255 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:36,257 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:36,257 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:36,257 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2020-12-23 00:35:36,397 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:36,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:35:36,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2020-12-23 00:35:36,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241158655] [2020-12-23 00:35:36,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 00:35:36,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:36,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 00:35:36,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:35:36,399 INFO L87 Difference]: Start difference. First operand 437 states and 545 transitions. Second operand 16 states. [2020-12-23 00:35:40,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:40,178 INFO L93 Difference]: Finished difference Result 1375 states and 1639 transitions. [2020-12-23 00:35:40,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2020-12-23 00:35:40,179 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2020-12-23 00:35:40,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:40,184 INFO L225 Difference]: With dead ends: 1375 [2020-12-23 00:35:40,185 INFO L226 Difference]: Without dead ends: 1373 [2020-12-23 00:35:40,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4138 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1164, Invalid=9756, Unknown=0, NotChecked=0, Total=10920 [2020-12-23 00:35:40,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2020-12-23 00:35:40,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 618. [2020-12-23 00:35:40,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 618 states. [2020-12-23 00:35:40,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 773 transitions. [2020-12-23 00:35:40,274 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 773 transitions. Word has length 44 [2020-12-23 00:35:40,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:40,275 INFO L481 AbstractCegarLoop]: Abstraction has 618 states and 773 transitions. [2020-12-23 00:35:40,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 00:35:40,275 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 773 transitions. [2020-12-23 00:35:40,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-23 00:35:40,276 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:40,277 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:40,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 00:35:40,487 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:40,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:40,488 INFO L82 PathProgramCache]: Analyzing trace with hash -255895901, now seen corresponding path program 5 times [2020-12-23 00:35:40,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:40,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632640721] [2020-12-23 00:35:40,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:40,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:40,937 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 55 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:40,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632640721] [2020-12-23 00:35:40,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129306026] [2020-12-23 00:35:40,938 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:41,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 00:35:41,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:35:41,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:35:41,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:35:41,483 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 80 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:41,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:35:41,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-12-23 00:35:41,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016442320] [2020-12-23 00:35:41,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 00:35:41,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:41,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 00:35:41,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:35:41,486 INFO L87 Difference]: Start difference. First operand 618 states and 773 transitions. Second operand 23 states. [2020-12-23 00:35:41,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:41,957 INFO L93 Difference]: Finished difference Result 872 states and 1057 transitions. [2020-12-23 00:35:41,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 00:35:41,958 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 50 [2020-12-23 00:35:41,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:41,960 INFO L225 Difference]: With dead ends: 872 [2020-12-23 00:35:41,960 INFO L226 Difference]: Without dead ends: 704 [2020-12-23 00:35:41,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=190, Invalid=512, Unknown=0, NotChecked=0, Total=702 [2020-12-23 00:35:41,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2020-12-23 00:35:42,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 626. [2020-12-23 00:35:42,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2020-12-23 00:35:42,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 774 transitions. [2020-12-23 00:35:42,031 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 774 transitions. Word has length 50 [2020-12-23 00:35:42,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:42,031 INFO L481 AbstractCegarLoop]: Abstraction has 626 states and 774 transitions. [2020-12-23 00:35:42,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 00:35:42,031 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 774 transitions. [2020-12-23 00:35:42,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 00:35:42,033 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:42,033 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:42,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 00:35:42,248 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:42,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:42,248 INFO L82 PathProgramCache]: Analyzing trace with hash 588720312, now seen corresponding path program 6 times [2020-12-23 00:35:42,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:42,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380940892] [2020-12-23 00:35:42,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:42,591 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 10 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:42,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380940892] [2020-12-23 00:35:42,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929079676] [2020-12-23 00:35:42,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:42,773 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-23 00:35:42,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:35:42,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 00:35:42,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:35:42,889 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:35:42,890 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:42,900 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:42,901 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:42,902 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2020-12-23 00:35:42,956 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-23 00:35:42,956 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2020-12-23 00:35:42,958 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:42,969 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:42,971 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:42,971 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:19 [2020-12-23 00:35:42,989 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-23 00:35:42,990 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2020-12-23 00:35:42,991 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:43,000 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:43,002 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:43,002 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:19 [2020-12-23 00:35:43,021 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-23 00:35:43,021 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2020-12-23 00:35:43,026 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:43,037 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:43,039 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:43,039 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:19 [2020-12-23 00:35:43,058 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2020-12-23 00:35:43,058 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 00:35:43,060 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:43,069 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:43,070 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:43,070 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:28 [2020-12-23 00:35:43,421 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:35:43,425 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:35:43,503 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 10 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:43,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:35:43,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2020-12-23 00:35:43,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437452727] [2020-12-23 00:35:43,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 00:35:43,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:43,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 00:35:43,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:35:43,505 INFO L87 Difference]: Start difference. First operand 626 states and 774 transitions. Second operand 28 states. [2020-12-23 00:35:47,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:47,032 INFO L93 Difference]: Finished difference Result 987 states and 1163 transitions. [2020-12-23 00:35:47,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 00:35:47,032 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 57 [2020-12-23 00:35:47,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:47,035 INFO L225 Difference]: With dead ends: 987 [2020-12-23 00:35:47,035 INFO L226 Difference]: Without dead ends: 847 [2020-12-23 00:35:47,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=458, Invalid=3082, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 00:35:47,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2020-12-23 00:35:47,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 661. [2020-12-23 00:35:47,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 661 states. [2020-12-23 00:35:47,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 806 transitions. [2020-12-23 00:35:47,132 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 806 transitions. Word has length 57 [2020-12-23 00:35:47,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:47,132 INFO L481 AbstractCegarLoop]: Abstraction has 661 states and 806 transitions. [2020-12-23 00:35:47,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 00:35:47,133 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 806 transitions. [2020-12-23 00:35:47,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 00:35:47,134 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:47,134 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:47,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 00:35:47,349 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:47,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:47,350 INFO L82 PathProgramCache]: Analyzing trace with hash 671625848, now seen corresponding path program 4 times [2020-12-23 00:35:47,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:47,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269789692] [2020-12-23 00:35:47,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:47,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:47,652 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 10 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:47,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269789692] [2020-12-23 00:35:47,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051898293] [2020-12-23 00:35:47,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:47,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:35:47,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:35:47,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 00:35:47,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:35:47,798 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:35:47,798 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:47,806 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:47,807 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:47,807 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-12-23 00:35:47,912 INFO L348 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2020-12-23 00:35:47,913 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2020-12-23 00:35:47,914 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:47,924 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:47,925 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:47,926 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:16 [2020-12-23 00:35:47,942 INFO L348 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2020-12-23 00:35:47,942 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2020-12-23 00:35:47,943 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:47,952 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:47,954 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:47,954 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:16 [2020-12-23 00:35:47,973 INFO L348 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2020-12-23 00:35:47,974 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2020-12-23 00:35:47,975 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:47,984 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:47,986 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:47,986 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:16 [2020-12-23 00:35:48,006 INFO L348 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2020-12-23 00:35:48,007 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2020-12-23 00:35:48,008 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:48,017 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:48,018 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:48,019 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:16 [2020-12-23 00:35:48,042 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:48,042 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 57 [2020-12-23 00:35:48,044 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:48,070 INFO L625 ElimStorePlain]: treesize reduction 22, result has 56.0 percent of original size [2020-12-23 00:35:48,071 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 00:35:48,072 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:28 [2020-12-23 00:35:48,229 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-12-23 00:35:48,985 WARN L197 SmtUtils]: Spent 698.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-12-23 00:35:49,652 WARN L197 SmtUtils]: Spent 598.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-12-23 00:35:50,287 WARN L197 SmtUtils]: Spent 473.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-12-23 00:35:50,740 WARN L197 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-12-23 00:35:50,750 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:35:50,758 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:35:50,764 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:35:50,766 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:35:50,840 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 34 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 00:35:50,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:35:50,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2020-12-23 00:35:50,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321670246] [2020-12-23 00:35:50,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 00:35:50,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:50,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 00:35:50,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:35:50,844 INFO L87 Difference]: Start difference. First operand 661 states and 806 transitions. Second operand 26 states. [2020-12-23 00:35:52,532 WARN L197 SmtUtils]: Spent 572.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-12-23 00:35:53,351 WARN L197 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-12-23 00:35:54,262 WARN L197 SmtUtils]: Spent 461.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-12-23 00:35:54,631 WARN L197 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-12-23 00:35:55,962 WARN L197 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2020-12-23 00:35:56,655 WARN L197 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2020-12-23 00:35:57,440 WARN L197 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2020-12-23 00:35:58,368 WARN L197 SmtUtils]: Spent 873.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2020-12-23 00:35:59,370 WARN L197 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2020-12-23 00:36:00,675 WARN L197 SmtUtils]: Spent 897.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2020-12-23 00:36:01,372 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-23 00:36:01,579 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-23 00:36:02,031 WARN L197 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2020-12-23 00:36:03,168 WARN L197 SmtUtils]: Spent 959.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2020-12-23 00:36:03,763 WARN L197 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-12-23 00:36:04,755 WARN L197 SmtUtils]: Spent 946.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-12-23 00:36:05,744 WARN L197 SmtUtils]: Spent 880.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2020-12-23 00:36:06,020 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2020-12-23 00:36:07,071 WARN L197 SmtUtils]: Spent 447.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-12-23 00:36:07,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:36:07,094 INFO L93 Difference]: Finished difference Result 1303 states and 1525 transitions. [2020-12-23 00:36:07,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-23 00:36:07,095 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 57 [2020-12-23 00:36:07,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:36:07,099 INFO L225 Difference]: With dead ends: 1303 [2020-12-23 00:36:07,099 INFO L226 Difference]: Without dead ends: 1293 [2020-12-23 00:36:07,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1814 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=816, Invalid=5990, Unknown=0, NotChecked=0, Total=6806 [2020-12-23 00:36:07,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2020-12-23 00:36:07,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 887. [2020-12-23 00:36:07,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 887 states. [2020-12-23 00:36:07,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1067 transitions. [2020-12-23 00:36:07,242 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1067 transitions. Word has length 57 [2020-12-23 00:36:07,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:36:07,242 INFO L481 AbstractCegarLoop]: Abstraction has 887 states and 1067 transitions. [2020-12-23 00:36:07,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 00:36:07,242 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1067 transitions. [2020-12-23 00:36:07,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 00:36:07,244 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:36:07,244 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:36:07,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:36:07,459 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:36:07,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:36:07,459 INFO L82 PathProgramCache]: Analyzing trace with hash -773786380, now seen corresponding path program 4 times [2020-12-23 00:36:07,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:36:07,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625594691] [2020-12-23 00:36:07,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:36:07,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:36:07,852 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 46 proven. 33 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 00:36:07,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625594691] [2020-12-23 00:36:07,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656018962] [2020-12-23 00:36:07,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:36:07,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:36:07,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:36:07,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 00:36:07,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:36:07,980 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:36:07,986 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:36:07,991 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:36:07,991 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:36:07,991 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2020-12-23 00:36:08,041 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-23 00:36:08,042 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2020-12-23 00:36:08,043 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:36:08,052 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:36:08,055 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:36:08,055 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:16 [2020-12-23 00:36:08,075 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-23 00:36:08,076 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2020-12-23 00:36:08,077 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:36:08,086 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:36:08,088 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:36:08,088 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:16 [2020-12-23 00:36:08,105 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-23 00:36:08,106 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2020-12-23 00:36:08,107 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:36:08,117 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:36:08,117 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:36:08,118 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2020-12-23 00:36:08,187 INFO L348 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2020-12-23 00:36:08,188 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2020-12-23 00:36:08,189 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:36:08,197 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:36:08,197 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:36:08,198 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2020-12-23 00:36:08,722 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:36:08,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:36:08,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2020-12-23 00:36:08,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615503239] [2020-12-23 00:36:08,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 00:36:08,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:36:08,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 00:36:08,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2020-12-23 00:36:08,724 INFO L87 Difference]: Start difference. First operand 887 states and 1067 transitions. Second operand 27 states. [2020-12-23 00:36:15,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:36:15,673 INFO L93 Difference]: Finished difference Result 2208 states and 2576 transitions. [2020-12-23 00:36:15,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2020-12-23 00:36:15,673 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 57 [2020-12-23 00:36:15,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:36:15,680 INFO L225 Difference]: With dead ends: 2208 [2020-12-23 00:36:15,680 INFO L226 Difference]: Without dead ends: 2192 [2020-12-23 00:36:15,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 44 SyntacticMatches, 6 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4936 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1592, Invalid=12214, Unknown=0, NotChecked=0, Total=13806 [2020-12-23 00:36:15,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2020-12-23 00:36:15,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 1282. [2020-12-23 00:36:15,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1282 states. [2020-12-23 00:36:15,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1553 transitions. [2020-12-23 00:36:15,903 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1553 transitions. Word has length 57 [2020-12-23 00:36:15,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:36:15,903 INFO L481 AbstractCegarLoop]: Abstraction has 1282 states and 1553 transitions. [2020-12-23 00:36:15,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 00:36:15,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1553 transitions. [2020-12-23 00:36:15,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 00:36:15,906 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:36:15,906 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:36:16,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-23 00:36:16,120 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:36:16,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:36:16,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1820935862, now seen corresponding path program 1 times [2020-12-23 00:36:16,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:36:16,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434502711] [2020-12-23 00:36:16,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:36:16,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:36:16,147 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-12-23 00:36:16,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434502711] [2020-12-23 00:36:16,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:36:16,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:36:16,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422001188] [2020-12-23 00:36:16,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:36:16,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:36:16,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:36:16,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:36:16,149 INFO L87 Difference]: Start difference. First operand 1282 states and 1553 transitions. Second operand 3 states. [2020-12-23 00:36:16,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:36:16,384 INFO L93 Difference]: Finished difference Result 1788 states and 2144 transitions. [2020-12-23 00:36:16,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:36:16,385 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2020-12-23 00:36:16,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:36:16,389 INFO L225 Difference]: With dead ends: 1788 [2020-12-23 00:36:16,389 INFO L226 Difference]: Without dead ends: 1139 [2020-12-23 00:36:16,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:36:16,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2020-12-23 00:36:16,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 925. [2020-12-23 00:36:16,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 925 states. [2020-12-23 00:36:16,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 1085 transitions. [2020-12-23 00:36:16,553 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 1085 transitions. Word has length 57 [2020-12-23 00:36:16,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:36:16,554 INFO L481 AbstractCegarLoop]: Abstraction has 925 states and 1085 transitions. [2020-12-23 00:36:16,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:36:16,554 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 1085 transitions. [2020-12-23 00:36:16,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 00:36:16,556 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:36:16,556 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:36:16,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-12-23 00:36:16,556 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:36:16,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:36:16,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1138519478, now seen corresponding path program 1 times [2020-12-23 00:36:16,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:36:16,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666631111] [2020-12-23 00:36:16,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:36:16,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:36:16,583 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-12-23 00:36:16,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666631111] [2020-12-23 00:36:16,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:36:16,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:36:16,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914143476] [2020-12-23 00:36:16,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:36:16,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:36:16,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:36:16,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:36:16,584 INFO L87 Difference]: Start difference. First operand 925 states and 1085 transitions. Second operand 3 states. [2020-12-23 00:36:16,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:36:16,730 INFO L93 Difference]: Finished difference Result 1199 states and 1409 transitions. [2020-12-23 00:36:16,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:36:16,730 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2020-12-23 00:36:16,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:36:16,733 INFO L225 Difference]: With dead ends: 1199 [2020-12-23 00:36:16,733 INFO L226 Difference]: Without dead ends: 592 [2020-12-23 00:36:16,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:36:16,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2020-12-23 00:36:16,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 533. [2020-12-23 00:36:16,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 533 states. [2020-12-23 00:36:16,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 608 transitions. [2020-12-23 00:36:16,808 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 608 transitions. Word has length 57 [2020-12-23 00:36:16,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:36:16,808 INFO L481 AbstractCegarLoop]: Abstraction has 533 states and 608 transitions. [2020-12-23 00:36:16,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:36:16,809 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 608 transitions. [2020-12-23 00:36:16,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 00:36:16,809 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:36:16,810 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:36:16,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-12-23 00:36:16,810 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:36:16,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:36:16,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1099874698, now seen corresponding path program 2 times [2020-12-23 00:36:16,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:36:16,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703803289] [2020-12-23 00:36:16,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:36:16,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:36:17,039 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:36:17,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703803289] [2020-12-23 00:36:17,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044476052] [2020-12-23 00:36:17,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:36:17,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:36:17,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:36:17,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 00:36:17,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:36:17,145 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:36:17,146 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:36:17,155 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:36:17,156 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:36:17,156 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-12-23 00:36:17,174 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2020-12-23 00:36:17,188 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-23 00:36:17,189 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 61 [2020-12-23 00:36:17,191 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:36:17,197 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:36:17,198 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:36:17,208 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:36:17,210 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:36:17,211 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:19 [2020-12-23 00:36:17,227 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2020-12-23 00:36:17,243 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-23 00:36:17,243 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 61 [2020-12-23 00:36:17,245 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:36:17,250 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:36:17,251 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:36:17,263 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:36:17,265 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:36:17,265 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:43, output treesize:19 [2020-12-23 00:36:17,283 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2020-12-23 00:36:17,302 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-23 00:36:17,302 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 61 [2020-12-23 00:36:17,304 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:36:17,310 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:36:17,311 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:36:17,323 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:36:17,324 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:36:17,325 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:43, output treesize:19 [2020-12-23 00:36:17,341 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2020-12-23 00:36:17,359 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-23 00:36:17,360 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 61 [2020-12-23 00:36:17,362 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:36:17,367 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:36:17,368 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:36:17,380 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:36:17,382 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 00:36:17,382 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:43, output treesize:31 [2020-12-23 00:36:17,928 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:36:17,930 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 00:36:17,994 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:36:17,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:36:17,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 24 [2020-12-23 00:36:17,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867206801] [2020-12-23 00:36:17,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 00:36:17,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:36:17,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 00:36:17,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2020-12-23 00:36:17,996 INFO L87 Difference]: Start difference. First operand 533 states and 608 transitions. Second operand 24 states. [2020-12-23 00:36:25,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:36:25,575 INFO L93 Difference]: Finished difference Result 1614 states and 1804 transitions. [2020-12-23 00:36:25,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2020-12-23 00:36:25,577 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 57 [2020-12-23 00:36:25,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:36:25,584 INFO L225 Difference]: With dead ends: 1614 [2020-12-23 00:36:25,584 INFO L226 Difference]: Without dead ends: 1612 [2020-12-23 00:36:25,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 43 SyntacticMatches, 9 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8110 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1948, Invalid=18358, Unknown=0, NotChecked=0, Total=20306 [2020-12-23 00:36:25,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2020-12-23 00:36:25,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 441. [2020-12-23 00:36:25,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2020-12-23 00:36:25,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 503 transitions. [2020-12-23 00:36:25,649 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 503 transitions. Word has length 57 [2020-12-23 00:36:25,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:36:25,649 INFO L481 AbstractCegarLoop]: Abstraction has 441 states and 503 transitions. [2020-12-23 00:36:25,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 00:36:25,650 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 503 transitions. [2020-12-23 00:36:25,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-23 00:36:25,651 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:36:25,651 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:36:25,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 00:36:25,867 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:36:25,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:36:25,867 INFO L82 PathProgramCache]: Analyzing trace with hash 135780592, now seen corresponding path program 2 times [2020-12-23 00:36:25,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:36:25,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160386851] [2020-12-23 00:36:25,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:36:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:36:25,895 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-12-23 00:36:25,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160386851] [2020-12-23 00:36:25,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:36:25,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:36:25,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654199057] [2020-12-23 00:36:25,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:36:25,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:36:25,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:36:25,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:36:25,897 INFO L87 Difference]: Start difference. First operand 441 states and 503 transitions. Second operand 3 states. [2020-12-23 00:36:26,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:36:26,018 INFO L93 Difference]: Finished difference Result 578 states and 663 transitions. [2020-12-23 00:36:26,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:36:26,019 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2020-12-23 00:36:26,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:36:26,020 INFO L225 Difference]: With dead ends: 578 [2020-12-23 00:36:26,021 INFO L226 Difference]: Without dead ends: 383 [2020-12-23 00:36:26,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:36:26,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-12-23 00:36:26,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 310. [2020-12-23 00:36:26,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-12-23 00:36:26,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 343 transitions. [2020-12-23 00:36:26,095 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 343 transitions. Word has length 59 [2020-12-23 00:36:26,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:36:26,095 INFO L481 AbstractCegarLoop]: Abstraction has 310 states and 343 transitions. [2020-12-23 00:36:26,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:36:26,096 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 343 transitions. [2020-12-23 00:36:26,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 00:36:26,097 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:36:26,097 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:36:26,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-12-23 00:36:26,097 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:36:26,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:36:26,098 INFO L82 PathProgramCache]: Analyzing trace with hash -197389365, now seen corresponding path program 7 times [2020-12-23 00:36:26,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:36:26,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299804224] [2020-12-23 00:36:26,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:36:26,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:36:26,532 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 12 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:36:26,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299804224] [2020-12-23 00:36:26,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301720306] [2020-12-23 00:36:26,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:36:26,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:36:26,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 00:36:26,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:36:26,805 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:36:26,806 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:36:26,819 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:36:26,820 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:36:26,821 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2020-12-23 00:36:26,890 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-23 00:36:26,891 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2020-12-23 00:36:26,893 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:36:26,904 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:36:26,906 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:36:26,906 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:19 [2020-12-23 00:36:26,928 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-23 00:36:26,928 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2020-12-23 00:36:26,930 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:36:26,943 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:36:26,944 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:36:26,945 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:19 [2020-12-23 00:36:26,965 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2020-12-23 00:36:26,966 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 00:36:26,968 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:36:26,977 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:36:26,979 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:36:26,979 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2020-12-23 00:36:27,464 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:36:27,467 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:36:27,469 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:36:27,494 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 12 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:36:27,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:36:27,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2020-12-23 00:36:27,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819167377] [2020-12-23 00:36:27,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 00:36:27,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:36:27,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 00:36:27,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:36:27,497 INFO L87 Difference]: Start difference. First operand 310 states and 343 transitions. Second operand 29 states. [2020-12-23 00:36:32,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:36:32,224 INFO L93 Difference]: Finished difference Result 480 states and 526 transitions. [2020-12-23 00:36:32,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 00:36:32,225 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 63 [2020-12-23 00:36:32,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:36:32,226 INFO L225 Difference]: With dead ends: 480 [2020-12-23 00:36:32,226 INFO L226 Difference]: Without dead ends: 470 [2020-12-23 00:36:32,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=544, Invalid=4012, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 00:36:32,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2020-12-23 00:36:32,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 316. [2020-12-23 00:36:32,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-12-23 00:36:32,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 349 transitions. [2020-12-23 00:36:32,272 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 349 transitions. Word has length 63 [2020-12-23 00:36:32,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:36:32,272 INFO L481 AbstractCegarLoop]: Abstraction has 316 states and 349 transitions. [2020-12-23 00:36:32,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 00:36:32,272 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 349 transitions. [2020-12-23 00:36:32,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 00:36:32,272 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:36:32,272 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:36:32,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:36:32,473 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:36:32,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:36:32,474 INFO L82 PathProgramCache]: Analyzing trace with hash 2064718467, now seen corresponding path program 5 times [2020-12-23 00:36:32,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:36:32,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262527588] [2020-12-23 00:36:32,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:36:32,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:36:32,776 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 12 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:36:32,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262527588] [2020-12-23 00:36:32,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279807004] [2020-12-23 00:36:32,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:36:32,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-23 00:36:32,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:36:32,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 00:36:32,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:36:32,985 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:36:32,986 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:36:32,991 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:36:32,992 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:36:32,992 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2020-12-23 00:36:33,039 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-23 00:36:33,040 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2020-12-23 00:36:33,041 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:36:33,050 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:36:33,051 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:36:33,051 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2020-12-23 00:36:33,129 INFO L348 Elim1Store]: treesize reduction 100, result has 20.0 percent of original size [2020-12-23 00:36:33,129 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 43 [2020-12-23 00:36:33,131 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:36:33,142 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:36:33,143 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:36:33,143 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:40 [2020-12-23 00:36:33,237 INFO L348 Elim1Store]: treesize reduction 177, result has 17.3 percent of original size [2020-12-23 00:36:33,238 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 58 [2020-12-23 00:36:33,242 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:36:33,256 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:36:33,258 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:36:33,258 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:52 [2020-12-23 00:36:33,458 INFO L348 Elim1Store]: treesize reduction 272, result has 15.3 percent of original size [2020-12-23 00:36:33,458 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 65 treesize of output 73 [2020-12-23 00:36:33,461 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:36:33,478 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:36:33,479 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:36:33,480 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:64 [2020-12-23 00:36:33,644 INFO L348 Elim1Store]: treesize reduction 385, result has 13.7 percent of original size [2020-12-23 00:36:33,645 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 74 treesize of output 85 [2020-12-23 00:36:33,648 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:36:33,666 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:36:33,667 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:36:33,667 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:77, output treesize:73 [2020-12-23 00:36:33,899 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 38 [2020-12-23 00:36:33,900 INFO L348 Elim1Store]: treesize reduction 516, result has 12.4 percent of original size [2020-12-23 00:36:33,900 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 83 treesize of output 97 [2020-12-23 00:36:33,903 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:36:33,924 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:36:33,925 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:36:33,926 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:86, output treesize:82 [2020-12-23 00:36:34,206 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 43 [2020-12-23 00:36:34,207 INFO L348 Elim1Store]: treesize reduction 665, result has 11.3 percent of original size [2020-12-23 00:36:34,208 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 112 [2020-12-23 00:36:34,213 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:36:34,237 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:36:34,238 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:36:34,238 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:98, output treesize:94 [2020-12-23 00:36:34,590 WARN L197 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 45 [2020-12-23 00:36:34,591 INFO L348 Elim1Store]: treesize reduction 544, result has 11.8 percent of original size [2020-12-23 00:36:34,591 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 80 treesize of output 100 [2020-12-23 00:36:34,598 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:36:34,618 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:36:34,619 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:36:34,619 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:80, output treesize:76 [2020-12-23 00:36:34,901 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:36:35,768 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:36:35,771 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:36:35,773 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-23 00:36:35,848 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 12 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:36:35,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:36:35,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 34 [2020-12-23 00:36:35,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789793620] [2020-12-23 00:36:35,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 00:36:35,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:36:35,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 00:36:35,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:36:35,851 INFO L87 Difference]: Start difference. First operand 316 states and 349 transitions. Second operand 34 states. [2020-12-23 00:36:38,706 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2020-12-23 00:36:44,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:36:44,736 INFO L93 Difference]: Finished difference Result 762 states and 835 transitions. [2020-12-23 00:36:44,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-12-23 00:36:44,738 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 63 [2020-12-23 00:36:44,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:36:44,741 INFO L225 Difference]: With dead ends: 762 [2020-12-23 00:36:44,741 INFO L226 Difference]: Without dead ends: 730 [2020-12-23 00:36:44,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3755 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=984, Invalid=10146, Unknown=0, NotChecked=0, Total=11130 [2020-12-23 00:36:44,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2020-12-23 00:36:44,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 443. [2020-12-23 00:36:44,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2020-12-23 00:36:44,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 481 transitions. [2020-12-23 00:36:44,818 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 481 transitions. Word has length 63 [2020-12-23 00:36:44,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:36:44,818 INFO L481 AbstractCegarLoop]: Abstraction has 443 states and 481 transitions. [2020-12-23 00:36:44,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 00:36:44,818 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 481 transitions. [2020-12-23 00:36:44,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 00:36:44,819 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:36:44,819 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:36:45,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 00:36:45,020 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:36:45,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:36:45,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1095698627, now seen corresponding path program 2 times [2020-12-23 00:36:45,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:36:45,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705576316] [2020-12-23 00:36:45,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:36:45,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:36:45,388 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:36:45,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705576316] [2020-12-23 00:36:45,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400330248] [2020-12-23 00:36:45,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:36:45,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:36:45,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:36:45,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 00:36:45,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:36:45,529 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:36:45,531 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:36:45,542 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:36:45,543 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:36:45,544 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-12-23 00:36:45,564 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2020-12-23 00:36:45,585 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-23 00:36:45,585 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 61 [2020-12-23 00:36:45,587 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:36:45,594 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:36:45,595 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:36:45,607 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:36:45,609 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:36:45,609 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:19 [2020-12-23 00:36:45,627 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2020-12-23 00:36:45,652 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-23 00:36:45,653 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 61 [2020-12-23 00:36:45,654 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:36:45,662 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:36:45,663 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:36:45,674 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:36:45,675 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:36:45,675 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:31 [2020-12-23 00:36:45,758 INFO L348 Elim1Store]: treesize reduction 100, result has 20.0 percent of original size [2020-12-23 00:36:45,759 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 43 [2020-12-23 00:36:45,761 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:36:45,778 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:36:45,780 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 00:36:45,781 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:43 [2020-12-23 00:36:46,729 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:36:46,731 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 00:36:46,822 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:36:46,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:36:46,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 27 [2020-12-23 00:36:46,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117535180] [2020-12-23 00:36:46,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 00:36:46,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:36:46,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 00:36:46,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2020-12-23 00:36:46,825 INFO L87 Difference]: Start difference. First operand 443 states and 481 transitions. Second operand 27 states. [2020-12-23 00:36:59,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:36:59,637 INFO L93 Difference]: Finished difference Result 1057 states and 1153 transitions. [2020-12-23 00:36:59,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2020-12-23 00:36:59,638 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 63 [2020-12-23 00:36:59,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:36:59,641 INFO L225 Difference]: With dead ends: 1057 [2020-12-23 00:36:59,642 INFO L226 Difference]: Without dead ends: 1055 [2020-12-23 00:36:59,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16235 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=3544, Invalid=35068, Unknown=0, NotChecked=0, Total=38612 [2020-12-23 00:36:59,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2020-12-23 00:36:59,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 461. [2020-12-23 00:36:59,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 461 states. [2020-12-23 00:36:59,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 502 transitions. [2020-12-23 00:36:59,718 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 502 transitions. Word has length 63 [2020-12-23 00:36:59,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:36:59,718 INFO L481 AbstractCegarLoop]: Abstraction has 461 states and 502 transitions. [2020-12-23 00:36:59,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 00:36:59,719 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 502 transitions. [2020-12-23 00:36:59,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-23 00:36:59,720 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:36:59,720 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:36:59,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:36:59,934 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:36:59,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:36:59,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1613028194, now seen corresponding path program 8 times [2020-12-23 00:36:59,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:36:59,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370313490] [2020-12-23 00:36:59,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:36:59,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:37:00,417 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 14 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:37:00,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370313490] [2020-12-23 00:37:00,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806036757] [2020-12-23 00:37:00,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:37:00,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:37:00,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:37:00,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-23 00:37:00,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:37:00,714 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:37:00,715 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:00,731 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:00,733 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:37:00,733 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:22 [2020-12-23 00:37:00,801 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-23 00:37:00,801 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2020-12-23 00:37:00,803 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:00,818 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:00,819 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:37:00,820 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:22 [2020-12-23 00:37:00,843 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2020-12-23 00:37:00,843 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 00:37:00,845 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:00,856 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:00,858 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:37:00,858 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:28 [2020-12-23 00:37:01,634 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:37:01,638 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:37:01,753 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 14 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:37:01,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:37:01,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2020-12-23 00:37:01,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106884785] [2020-12-23 00:37:01,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 00:37:01,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:37:01,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 00:37:01,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1070, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 00:37:01,755 INFO L87 Difference]: Start difference. First operand 461 states and 502 transitions. Second operand 35 states. [2020-12-23 00:37:06,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:37:06,627 INFO L93 Difference]: Finished difference Result 597 states and 646 transitions. [2020-12-23 00:37:06,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 00:37:06,629 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 69 [2020-12-23 00:37:06,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:37:06,631 INFO L225 Difference]: With dead ends: 597 [2020-12-23 00:37:06,631 INFO L226 Difference]: Without dead ends: 587 [2020-12-23 00:37:06,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=396, Invalid=3026, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 00:37:06,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-12-23 00:37:06,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 467. [2020-12-23 00:37:06,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 467 states. [2020-12-23 00:37:06,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 508 transitions. [2020-12-23 00:37:06,734 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 508 transitions. Word has length 69 [2020-12-23 00:37:06,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:37:06,734 INFO L481 AbstractCegarLoop]: Abstraction has 467 states and 508 transitions. [2020-12-23 00:37:06,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 00:37:06,735 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 508 transitions. [2020-12-23 00:37:06,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-23 00:37:06,736 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:37:06,737 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:37:06,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 00:37:06,951 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:37:06,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:37:06,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1305936796, now seen corresponding path program 5 times [2020-12-23 00:37:06,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:37:06,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742728900] [2020-12-23 00:37:06,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:37:06,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:37:07,516 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 14 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:37:07,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742728900] [2020-12-23 00:37:07,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569298212] [2020-12-23 00:37:07,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:37:07,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-23 00:37:07,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:37:07,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 00:37:07,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:37:08,123 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:37:08,124 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:08,140 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:08,142 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:37:08,142 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2020-12-23 00:37:08,230 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-23 00:37:08,231 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2020-12-23 00:37:08,232 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:08,247 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:08,249 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:37:08,249 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:19 [2020-12-23 00:37:08,273 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2020-12-23 00:37:08,273 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 00:37:08,275 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:08,288 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:08,289 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:37:08,289 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2020-12-23 00:37:09,077 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:37:09,078 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:37:09,079 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:37:09,109 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 14 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:37:09,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:37:09,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2020-12-23 00:37:09,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124868743] [2020-12-23 00:37:09,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 00:37:09,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:37:09,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 00:37:09,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:37:09,112 INFO L87 Difference]: Start difference. First operand 467 states and 508 transitions. Second operand 32 states. [2020-12-23 00:37:15,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:37:15,791 INFO L93 Difference]: Finished difference Result 673 states and 724 transitions. [2020-12-23 00:37:15,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 00:37:15,793 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 69 [2020-12-23 00:37:15,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:37:15,796 INFO L225 Difference]: With dead ends: 673 [2020-12-23 00:37:15,796 INFO L226 Difference]: Without dead ends: 663 [2020-12-23 00:37:15,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1348 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=577, Invalid=4679, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 00:37:15,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2020-12-23 00:37:15,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 467. [2020-12-23 00:37:15,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 467 states. [2020-12-23 00:37:15,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 508 transitions. [2020-12-23 00:37:15,875 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 508 transitions. Word has length 69 [2020-12-23 00:37:15,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:37:15,875 INFO L481 AbstractCegarLoop]: Abstraction has 467 states and 508 transitions. [2020-12-23 00:37:15,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 00:37:15,875 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 508 transitions. [2020-12-23 00:37:15,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-23 00:37:15,876 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:37:15,876 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:37:16,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 00:37:16,077 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:37:16,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:37:16,078 INFO L82 PathProgramCache]: Analyzing trace with hash -922972836, now seen corresponding path program 3 times [2020-12-23 00:37:16,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:37:16,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968370638] [2020-12-23 00:37:16,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:37:16,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:37:16,573 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-12-23 00:37:16,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968370638] [2020-12-23 00:37:16,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579703625] [2020-12-23 00:37:16,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:37:16,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 00:37:16,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:37:16,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 00:37:16,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:37:16,827 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:37:16,829 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:16,846 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:16,847 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:37:16,848 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:27 [2020-12-23 00:37:16,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:16,904 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2020-12-23 00:37:16,906 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:16,931 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:16,932 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:37:16,932 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:39 [2020-12-23 00:37:17,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,010 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:17,011 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 43 [2020-12-23 00:37:17,013 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:17,043 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:17,044 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:37:17,045 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:51 [2020-12-23 00:37:17,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,133 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:17,134 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 58 [2020-12-23 00:37:17,136 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:17,167 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:17,168 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:37:17,169 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:67, output treesize:63 [2020-12-23 00:37:17,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,276 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:17,277 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 73 [2020-12-23 00:37:17,280 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:17,319 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:17,321 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:37:17,321 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:79, output treesize:75 [2020-12-23 00:37:17,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,537 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:17,537 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 71 [2020-12-23 00:37:17,540 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:17,579 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:17,580 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:37:17,581 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:74, output treesize:70 [2020-12-23 00:37:17,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,725 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:17,726 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 69 treesize of output 83 [2020-12-23 00:37:17,728 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:17,769 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:17,771 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:37:17,771 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:83, output treesize:79 [2020-12-23 00:37:17,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:17,924 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:17,924 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 95 [2020-12-23 00:37:17,930 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:17,971 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:17,973 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:37:17,974 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:92, output treesize:88 [2020-12-23 00:37:18,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,147 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:18,147 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 87 treesize of output 107 [2020-12-23 00:37:18,151 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:18,193 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:18,195 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:37:18,195 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:101, output treesize:97 [2020-12-23 00:37:18,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:37:18,408 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:18,409 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 45 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 99 treesize of output 122 [2020-12-23 00:37:18,411 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:18,462 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:18,464 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:37:18,464 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:113, output treesize:109 [2020-12-23 00:37:18,726 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:37:18,728 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:37:18,731 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:37:18,733 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:37:18,737 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:37:18,740 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 00:37:18,746 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:37:18,764 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-12-23 00:37:18,781 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 00:37:18,785 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 7 disjuncts [2020-12-23 00:37:18,788 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 8 disjuncts [2020-12-23 00:37:19,257 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:37:19,261 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:37:19,265 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-23 00:37:19,269 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-23 00:37:19,271 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-23 00:37:19,413 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-12-23 00:37:19,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:37:19,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 20] total 27 [2020-12-23 00:37:19,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067095027] [2020-12-23 00:37:19,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 00:37:19,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:37:19,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 00:37:19,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-12-23 00:37:19,416 INFO L87 Difference]: Start difference. First operand 467 states and 508 transitions. Second operand 27 states. [2020-12-23 00:37:20,544 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-12-23 00:37:21,313 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-12-23 00:37:21,546 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-12-23 00:37:21,810 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-12-23 00:37:22,056 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-12-23 00:37:22,242 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2020-12-23 00:37:22,737 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2020-12-23 00:37:23,182 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2020-12-23 00:37:23,440 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2020-12-23 00:37:23,717 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-12-23 00:37:23,962 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2020-12-23 00:37:24,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:37:24,486 INFO L93 Difference]: Finished difference Result 636 states and 696 transitions. [2020-12-23 00:37:24,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 00:37:24,488 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 69 [2020-12-23 00:37:24,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:37:24,490 INFO L225 Difference]: With dead ends: 636 [2020-12-23 00:37:24,491 INFO L226 Difference]: Without dead ends: 520 [2020-12-23 00:37:24,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 53 SyntacticMatches, 9 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=476, Invalid=2176, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 00:37:24,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2020-12-23 00:37:24,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 467. [2020-12-23 00:37:24,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 467 states. [2020-12-23 00:37:24,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 505 transitions. [2020-12-23 00:37:24,575 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 505 transitions. Word has length 69 [2020-12-23 00:37:24,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:37:24,575 INFO L481 AbstractCegarLoop]: Abstraction has 467 states and 505 transitions. [2020-12-23 00:37:24,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 00:37:24,575 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 505 transitions. [2020-12-23 00:37:24,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-23 00:37:24,576 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:37:24,576 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:37:24,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-12-23 00:37:24,777 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:37:24,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:37:24,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1005299866, now seen corresponding path program 4 times [2020-12-23 00:37:24,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:37:24,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072418848] [2020-12-23 00:37:24,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:37:24,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:37:25,312 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 14 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:37:25,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072418848] [2020-12-23 00:37:25,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115615365] [2020-12-23 00:37:25,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:37:25,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:37:25,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:37:25,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 00:37:25,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:37:25,612 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:37:25,614 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:25,630 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:25,632 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:37:25,632 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2020-12-23 00:37:25,724 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-23 00:37:25,725 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2020-12-23 00:37:25,726 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:25,746 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:25,748 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:37:25,748 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:40 [2020-12-23 00:37:25,871 INFO L348 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2020-12-23 00:37:25,872 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 37 [2020-12-23 00:37:25,874 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:25,891 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:25,893 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:37:25,893 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2020-12-23 00:37:26,835 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:37:26,838 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:37:26,841 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:37:26,897 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 14 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:37:26,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:37:26,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2020-12-23 00:37:26,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279870115] [2020-12-23 00:37:26,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 00:37:26,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:37:26,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 00:37:26,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2020-12-23 00:37:26,899 INFO L87 Difference]: Start difference. First operand 467 states and 505 transitions. Second operand 31 states. [2020-12-23 00:37:35,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:37:35,236 INFO L93 Difference]: Finished difference Result 840 states and 908 transitions. [2020-12-23 00:37:35,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-23 00:37:35,237 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 69 [2020-12-23 00:37:35,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:37:35,239 INFO L225 Difference]: With dead ends: 840 [2020-12-23 00:37:35,239 INFO L226 Difference]: Without dead ends: 756 [2020-12-23 00:37:35,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=569, Invalid=4543, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 00:37:35,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2020-12-23 00:37:35,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 442. [2020-12-23 00:37:35,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 442 states. [2020-12-23 00:37:35,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 476 transitions. [2020-12-23 00:37:35,338 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 476 transitions. Word has length 69 [2020-12-23 00:37:35,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:37:35,338 INFO L481 AbstractCegarLoop]: Abstraction has 442 states and 476 transitions. [2020-12-23 00:37:35,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 00:37:35,339 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 476 transitions. [2020-12-23 00:37:35,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-23 00:37:35,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:37:35,340 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:37:35,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:37:35,554 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:37:35,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:37:35,554 INFO L82 PathProgramCache]: Analyzing trace with hash 116424598, now seen corresponding path program 3 times [2020-12-23 00:37:35,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:37:35,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729438968] [2020-12-23 00:37:35,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:37:35,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:37:36,030 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 14 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:37:36,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729438968] [2020-12-23 00:37:36,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043839785] [2020-12-23 00:37:36,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:37:36,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-23 00:37:36,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:37:36,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 00:37:36,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:37:36,446 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:37:36,448 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:36,460 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:36,461 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:37:36,461 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-12-23 00:37:36,557 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-23 00:37:36,558 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2020-12-23 00:37:36,562 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:36,576 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:36,578 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:37:36,579 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:19 [2020-12-23 00:37:36,608 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-23 00:37:36,609 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2020-12-23 00:37:36,610 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:36,624 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:36,626 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:37:36,626 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2020-12-23 00:37:36,749 INFO L348 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2020-12-23 00:37:36,749 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2020-12-23 00:37:36,751 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:36,767 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:36,768 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:37:36,769 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2020-12-23 00:37:37,596 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:37:37,599 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:37:37,602 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:37:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 50 proven. 111 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 00:37:37,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:37:37,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2020-12-23 00:37:37,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905409589] [2020-12-23 00:37:37,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 00:37:37,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:37:37,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 00:37:37,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=795, Unknown=0, NotChecked=0, Total=870 [2020-12-23 00:37:37,699 INFO L87 Difference]: Start difference. First operand 442 states and 476 transitions. Second operand 30 states. [2020-12-23 00:37:41,049 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-23 00:37:42,187 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-23 00:37:54,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:37:54,379 INFO L93 Difference]: Finished difference Result 800 states and 871 transitions. [2020-12-23 00:37:54,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-12-23 00:37:54,379 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 69 [2020-12-23 00:37:54,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:37:54,382 INFO L225 Difference]: With dead ends: 800 [2020-12-23 00:37:54,382 INFO L226 Difference]: Without dead ends: 762 [2020-12-23 00:37:54,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4938 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=1270, Invalid=13250, Unknown=0, NotChecked=0, Total=14520 [2020-12-23 00:37:54,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2020-12-23 00:37:54,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 397. [2020-12-23 00:37:54,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2020-12-23 00:37:54,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 424 transitions. [2020-12-23 00:37:54,457 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 424 transitions. Word has length 69 [2020-12-23 00:37:54,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:37:54,458 INFO L481 AbstractCegarLoop]: Abstraction has 397 states and 424 transitions. [2020-12-23 00:37:54,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 00:37:54,458 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 424 transitions. [2020-12-23 00:37:54,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-23 00:37:54,459 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:37:54,459 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:37:54,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-23 00:37:54,671 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:37:54,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:37:54,672 INFO L82 PathProgramCache]: Analyzing trace with hash 369122196, now seen corresponding path program 2 times [2020-12-23 00:37:54,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:37:54,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066575695] [2020-12-23 00:37:54,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:37:54,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:37:55,146 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:37:55,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066575695] [2020-12-23 00:37:55,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603722506] [2020-12-23 00:37:55,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:37:55,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:37:55,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:37:55,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 00:37:55,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:37:55,300 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:37:55,303 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:55,319 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:55,321 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:37:55,321 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-12-23 00:37:55,350 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2020-12-23 00:37:55,386 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-23 00:37:55,387 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 57 [2020-12-23 00:37:55,390 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:55,402 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:55,404 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:37:55,421 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:55,423 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:37:55,423 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:43, output treesize:31 [2020-12-23 00:37:55,543 INFO L348 Elim1Store]: treesize reduction 100, result has 20.0 percent of original size [2020-12-23 00:37:55,543 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 43 [2020-12-23 00:37:55,545 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:37:55,566 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:37:55,568 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 00:37:55,568 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:43 [2020-12-23 00:37:57,012 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:37:57,014 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 00:37:57,141 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:37:57,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:37:57,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 29 [2020-12-23 00:37:57,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122103871] [2020-12-23 00:37:57,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 00:37:57,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:37:57,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 00:37:57,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:37:57,144 INFO L87 Difference]: Start difference. First operand 397 states and 424 transitions. Second operand 29 states. [2020-12-23 00:38:13,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:38:13,213 INFO L93 Difference]: Finished difference Result 865 states and 928 transitions. [2020-12-23 00:38:13,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2020-12-23 00:38:13,216 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 69 [2020-12-23 00:38:13,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:38:13,221 INFO L225 Difference]: With dead ends: 865 [2020-12-23 00:38:13,221 INFO L226 Difference]: Without dead ends: 863 [2020-12-23 00:38:13,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11731 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=2804, Invalid=26608, Unknown=0, NotChecked=0, Total=29412 [2020-12-23 00:38:13,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2020-12-23 00:38:13,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 395. [2020-12-23 00:38:13,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-12-23 00:38:13,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 421 transitions. [2020-12-23 00:38:13,308 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 421 transitions. Word has length 69 [2020-12-23 00:38:13,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:38:13,308 INFO L481 AbstractCegarLoop]: Abstraction has 395 states and 421 transitions. [2020-12-23 00:38:13,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 00:38:13,308 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 421 transitions. [2020-12-23 00:38:13,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-23 00:38:13,309 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:38:13,309 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:38:13,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:38:13,510 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:38:13,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:38:13,511 INFO L82 PathProgramCache]: Analyzing trace with hash -709817551, now seen corresponding path program 9 times [2020-12-23 00:38:13,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:38:13,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201769522] [2020-12-23 00:38:13,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:38:13,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:38:14,241 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 16 proven. 193 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:38:14,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201769522] [2020-12-23 00:38:14,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346273095] [2020-12-23 00:38:14,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:38:14,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-23 00:38:14,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:38:14,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 00:38:14,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:38:14,603 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:38:14,605 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:38:14,622 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:38:14,625 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:38:14,625 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2020-12-23 00:38:14,737 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2020-12-23 00:38:14,738 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 00:38:14,740 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:38:14,760 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:38:14,762 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:38:14,763 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2020-12-23 00:38:15,801 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:38:15,805 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:38:15,947 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 16 proven. 193 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:38:15,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:38:15,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 32 [2020-12-23 00:38:15,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776155435] [2020-12-23 00:38:15,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 00:38:15,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:38:15,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 00:38:15,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:38:15,948 INFO L87 Difference]: Start difference. First operand 395 states and 421 transitions. Second operand 32 states. [2020-12-23 00:38:23,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:38:23,765 INFO L93 Difference]: Finished difference Result 564 states and 599 transitions. [2020-12-23 00:38:23,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 00:38:23,768 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 75 [2020-12-23 00:38:23,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:38:23,770 INFO L225 Difference]: With dead ends: 564 [2020-12-23 00:38:23,771 INFO L226 Difference]: Without dead ends: 554 [2020-12-23 00:38:23,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=346, Invalid=2846, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 00:38:23,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-12-23 00:38:23,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 401. [2020-12-23 00:38:23,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 401 states. [2020-12-23 00:38:23,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 427 transitions. [2020-12-23 00:38:23,850 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 427 transitions. Word has length 75 [2020-12-23 00:38:23,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:38:23,851 INFO L481 AbstractCegarLoop]: Abstraction has 401 states and 427 transitions. [2020-12-23 00:38:23,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 00:38:23,851 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 427 transitions. [2020-12-23 00:38:23,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-23 00:38:23,852 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:38:23,852 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:38:24,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-23 00:38:24,055 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:38:24,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:38:24,056 INFO L82 PathProgramCache]: Analyzing trace with hash -12766289, now seen corresponding path program 6 times [2020-12-23 00:38:24,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:38:24,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101148421] [2020-12-23 00:38:24,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:38:24,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:38:24,871 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 16 proven. 193 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:38:24,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101148421] [2020-12-23 00:38:24,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986701094] [2020-12-23 00:38:24,872 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:38:25,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-23 00:38:25,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:38:25,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 00:38:25,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:38:25,573 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:38:25,576 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:38:25,599 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:38:25,603 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:38:25,603 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2020-12-23 00:38:25,739 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2020-12-23 00:38:25,740 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 00:38:25,743 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:38:25,761 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:38:25,763 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:38:25,763 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2020-12-23 00:38:26,977 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:38:26,980 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:38:26,982 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:38:27,020 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 16 proven. 193 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:38:27,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:38:27,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 34 [2020-12-23 00:38:27,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653074558] [2020-12-23 00:38:27,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 00:38:27,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:38:27,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 00:38:27,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:38:27,022 INFO L87 Difference]: Start difference. First operand 401 states and 427 transitions. Second operand 34 states. [2020-12-23 00:38:37,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:38:37,299 INFO L93 Difference]: Finished difference Result 665 states and 702 transitions. [2020-12-23 00:38:37,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-23 00:38:37,300 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 75 [2020-12-23 00:38:37,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:38:37,302 INFO L225 Difference]: With dead ends: 665 [2020-12-23 00:38:37,302 INFO L226 Difference]: Without dead ends: 655 [2020-12-23 00:38:37,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2207 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=820, Invalid=7012, Unknown=0, NotChecked=0, Total=7832 [2020-12-23 00:38:37,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2020-12-23 00:38:37,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 401. [2020-12-23 00:38:37,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 401 states. [2020-12-23 00:38:37,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 427 transitions. [2020-12-23 00:38:37,381 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 427 transitions. Word has length 75 [2020-12-23 00:38:37,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:38:37,381 INFO L481 AbstractCegarLoop]: Abstraction has 401 states and 427 transitions. [2020-12-23 00:38:37,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 00:38:37,382 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 427 transitions. [2020-12-23 00:38:37,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-23 00:38:37,382 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:38:37,382 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 5, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:38:37,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-23 00:38:37,591 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:38:37,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:38:37,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1163509225, now seen corresponding path program 6 times [2020-12-23 00:38:37,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:38:37,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799341279] [2020-12-23 00:38:37,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:38:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:38:38,050 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:38:38,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799341279] [2020-12-23 00:38:38,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968315810] [2020-12-23 00:38:38,050 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:38:38,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-23 00:38:38,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:38:38,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 00:38:38,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:38:38,453 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 00:38:38,455 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:38:38,468 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:38:38,469 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:38:38,469 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-12-23 00:38:38,492 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2020-12-23 00:38:38,518 INFO L348 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2020-12-23 00:38:38,519 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 57 [2020-12-23 00:38:38,521 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:38:38,531 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:38:38,532 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:38:38,547 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:38:38,549 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 00:38:38,549 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:31 [2020-12-23 00:38:39,589 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:38:39,591 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 00:38:39,690 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:38:39,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:38:39,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2020-12-23 00:38:39,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482023996] [2020-12-23 00:38:39,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 00:38:39,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:38:39,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 00:38:39,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:38:39,692 INFO L87 Difference]: Start difference. First operand 401 states and 427 transitions. Second operand 28 states.