/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-patterns/array16_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:58:36,806 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:58:36,811 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:58:36,863 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:58:36,864 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:58:36,868 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:58:36,872 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:58:36,877 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:58:36,881 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:58:36,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:58:36,891 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:58:36,893 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:58:36,894 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:58:36,897 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:58:36,899 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:58:36,901 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:58:36,902 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:58:36,906 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:58:36,922 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:58:36,924 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:58:36,928 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:58:36,931 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:58:36,932 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:58:36,938 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:58:36,943 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 00:58:36,944 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 00:58:36,944 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 00:58:36,945 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 00:58:36,945 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 00:58:36,954 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 00:58:36,954 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 00:58:36,955 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 00:58:36,956 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 00:58:36,960 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 00:58:36,961 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 00:58:36,961 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 00:58:36,961 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 00:58:36,962 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 00:58:36,962 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:58:36,966 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:58:36,967 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:58:36,971 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 00:58:37,009 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:58:37,010 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:58:37,011 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:58:37,011 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:58:37,012 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:58:37,012 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:58:37,012 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:58:37,012 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:58:37,012 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:58:37,013 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:58:37,013 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:58:37,013 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:58:37,013 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:58:37,013 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:58:37,014 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:58:37,014 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:58:37,014 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:58:37,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:58:37,015 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:58:37,015 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:58:37,015 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:58:37,015 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:58:37,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:58:37,015 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:58:37,016 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:58:37,016 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:58:37,413 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:58:37,439 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:58:37,442 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:58:37,444 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:58:37,444 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:58:37,445 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array16_pattern.c [2020-12-23 00:58:37,529 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9d390b18b/cc1885a6950d44e7bfb08b1b2d0f80a5/FLAGc708bdbef [2020-12-23 00:58:38,216 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:58:38,217 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-patterns/array16_pattern.c [2020-12-23 00:58:38,231 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9d390b18b/cc1885a6950d44e7bfb08b1b2d0f80a5/FLAGc708bdbef [2020-12-23 00:58:38,560 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9d390b18b/cc1885a6950d44e7bfb08b1b2d0f80a5 [2020-12-23 00:58:38,563 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:58:38,566 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:58:38,570 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:58:38,570 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:58:38,574 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:58:38,575 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:58:38" (1/1) ... [2020-12-23 00:58:38,577 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c7d0073 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:58:38, skipping insertion in model container [2020-12-23 00:58:38,577 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:58:38" (1/1) ... [2020-12-23 00:58:38,597 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:58:38,631 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:58:38,800 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-patterns/array16_pattern.c[1311,1324] left hand side expression in assignment: lhs: VariableLHS[~ARR_SIZE~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~row~0,] left hand side expression in assignment: lhs: VariableLHS[~column~0,] left hand side expression in assignment: lhs: ArrayLHS[ArrayLHS[VariableLHS[~array~0,],[IdentifierExpression[~row~0,]]],[IdentifierExpression[~column~0,]]] left hand side expression in assignment: lhs: VariableLHS[~index1~0,] left hand side expression in assignment: lhs: VariableLHS[~index2~0,] left hand side expression in assignment: lhs: ArrayLHS[ArrayLHS[VariableLHS[~array~0,],[IdentifierExpression[~index1~0,]]],[IdentifierExpression[~index2~0,]]] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: VariableLHS[~row~0,] left hand side expression in assignment: lhs: VariableLHS[~column~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] [2020-12-23 00:58:38,827 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:58:38,840 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:58:38,854 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-patterns/array16_pattern.c[1311,1324] left hand side expression in assignment: lhs: VariableLHS[~ARR_SIZE~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~row~0,] left hand side expression in assignment: lhs: VariableLHS[~column~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#array~0,],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#array~0,],offset],BinaryExpression[ARITHMUL,IdentifierExpression[~row~0,],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~ARR_SIZE~0,GLOBAL]]]],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~column~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~index1~0,] left hand side expression in assignment: lhs: VariableLHS[~index2~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#array~0,],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#array~0,],offset],BinaryExpression[ARITHMUL,IdentifierExpression[~index1~0,],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~ARR_SIZE~0,GLOBAL]]]],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~index2~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: VariableLHS[~row~0,] left hand side expression in assignment: lhs: VariableLHS[~column~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] [2020-12-23 00:58:38,868 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:58:38,886 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:58:38,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:58:38 WrapperNode [2020-12-23 00:58:38,887 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:58:38,888 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:58:38,888 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:58:38,889 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:58:38,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:58:38" (1/1) ... [2020-12-23 00:58:38,907 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:58:38" (1/1) ... [2020-12-23 00:58:38,933 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:58:38,934 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:58:38,934 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:58:38,934 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:58:38,946 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:58:38" (1/1) ... [2020-12-23 00:58:38,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:58:38" (1/1) ... [2020-12-23 00:58:38,949 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:58:38" (1/1) ... [2020-12-23 00:58:38,949 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:58:38" (1/1) ... [2020-12-23 00:58:38,957 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:58:38" (1/1) ... [2020-12-23 00:58:38,973 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:58:38" (1/1) ... [2020-12-23 00:58:38,975 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:58:38" (1/1) ... [2020-12-23 00:58:38,977 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:58:38,978 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:58:38,978 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:58:38,979 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:58:38,980 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:58:38" (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 00:58:39,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:58:39,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:58:39,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:58:39,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:58:39,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:58:39,111 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:58:39,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:58:39,472 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:58:39,472 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-23 00:58:39,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:58:39 BoogieIcfgContainer [2020-12-23 00:58:39,477 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:58:39,482 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:58:39,482 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:58:39,486 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:58:39,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:58:38" (1/3) ... [2020-12-23 00:58:39,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a5b8f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:58:39, skipping insertion in model container [2020-12-23 00:58:39,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:58:38" (2/3) ... [2020-12-23 00:58:39,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a5b8f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:58:39, skipping insertion in model container [2020-12-23 00:58:39,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:58:39" (3/3) ... [2020-12-23 00:58:39,496 INFO L111 eAbstractionObserver]: Analyzing ICFG array16_pattern.c [2020-12-23 00:58:39,515 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:58:39,523 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:58:39,545 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:58:39,573 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:58:39,573 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:58:39,573 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:58:39,574 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:58:39,574 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:58:39,574 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:58:39,574 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:58:39,575 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:58:39,592 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-12-23 00:58:39,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 00:58:39,599 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:58:39,600 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:58:39,600 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:58:39,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:58:39,607 INFO L82 PathProgramCache]: Analyzing trace with hash -939636046, now seen corresponding path program 1 times [2020-12-23 00:58:39,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:58:39,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142768415] [2020-12-23 00:58:39,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:58:39,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:58:39,784 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 00:58:39,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142768415] [2020-12-23 00:58:39,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:58:39,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:58:39,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341904220] [2020-12-23 00:58:39,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:58:39,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:58:39,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:58:39,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:58:39,813 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2020-12-23 00:58:39,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:58:39,834 INFO L93 Difference]: Finished difference Result 53 states and 82 transitions. [2020-12-23 00:58:39,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:58:39,835 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-23 00:58:39,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:58:39,844 INFO L225 Difference]: With dead ends: 53 [2020-12-23 00:58:39,845 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 00:58:39,848 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 00:58:39,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 00:58:39,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-23 00:58:39,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 00:58:39,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-12-23 00:58:39,887 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 11 [2020-12-23 00:58:39,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:58:39,887 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-12-23 00:58:39,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:58:39,888 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-12-23 00:58:39,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 00:58:39,889 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:58:39,889 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:58:39,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:58:39,889 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:58:39,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:58:39,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1418560660, now seen corresponding path program 1 times [2020-12-23 00:58:39,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:58:39,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279229077] [2020-12-23 00:58:39,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:58:39,911 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:58:39,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2016068229] [2020-12-23 00:58:39,912 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 00:58:40,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:58:40,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:58:40,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:58:40,243 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 00:58:40,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279229077] [2020-12-23 00:58:40,244 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:58:40,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016068229] [2020-12-23 00:58:40,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:58:40,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 00:58:40,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571315061] [2020-12-23 00:58:40,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:58:40,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:58:40,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:58:40,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:58:40,248 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 5 states. [2020-12-23 00:58:40,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:58:40,421 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2020-12-23 00:58:40,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:58:40,422 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-12-23 00:58:40,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:58:40,423 INFO L225 Difference]: With dead ends: 49 [2020-12-23 00:58:40,423 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 00:58:40,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:58:40,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 00:58:40,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-12-23 00:58:40,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 00:58:40,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-12-23 00:58:40,432 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2020-12-23 00:58:40,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:58:40,432 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-12-23 00:58:40,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:58:40,433 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-12-23 00:58:40,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 00:58:40,434 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:58:40,434 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, 1, 1, 1] [2020-12-23 00:58:40,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 00:58:40,648 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:58:40,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:58:40,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1820112994, now seen corresponding path program 1 times [2020-12-23 00:58:40,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:58:40,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823781845] [2020-12-23 00:58:40,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:58:40,665 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:58:40,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [438236048] [2020-12-23 00:58:40,666 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 00:58:40,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:58:40,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:58:40,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:58:40,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:58:40,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823781845] [2020-12-23 00:58:40,775 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:58:40,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438236048] [2020-12-23 00:58:40,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:58:40,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:58:40,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57412084] [2020-12-23 00:58:40,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:58:40,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:58:40,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:58:40,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:58:40,779 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 4 states. [2020-12-23 00:58:40,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:58:40,847 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2020-12-23 00:58:40,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:58:40,847 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-12-23 00:58:40,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:58:40,848 INFO L225 Difference]: With dead ends: 51 [2020-12-23 00:58:40,849 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 00:58:40,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 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 00:58:40,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 00:58:40,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-12-23 00:58:40,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 00:58:40,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-12-23 00:58:40,856 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 23 [2020-12-23 00:58:40,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:58:40,856 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-12-23 00:58:40,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:58:40,857 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-12-23 00:58:40,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 00:58:40,858 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:58:40,858 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, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:58:41,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:58:41,072 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:58:41,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:58:41,073 INFO L82 PathProgramCache]: Analyzing trace with hash 162122786, now seen corresponding path program 1 times [2020-12-23 00:58:41,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:58:41,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257579015] [2020-12-23 00:58:41,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:58:41,087 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:58:41,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [174120227] [2020-12-23 00:58:41,088 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 00:58:41,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:58:41,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 00:58:41,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:58:41,263 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-23 00:58:41,265 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:58:41,275 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:58:41,276 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:58:41,276 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2020-12-23 00:58:41,367 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:58:41,368 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 28 treesize of output 61 [2020-12-23 00:58:41,373 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:58:41,412 INFO L625 ElimStorePlain]: treesize reduction 20, result has 70.6 percent of original size [2020-12-23 00:58:41,421 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:58:41,426 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 00:58:41,427 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:40, output treesize:45 [2020-12-23 00:58:41,430 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:58:41,507 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:58:41,566 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:58:41,707 INFO L348 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2020-12-23 00:58:41,708 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2020-12-23 00:58:41,710 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:58:41,714 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:58:41,715 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 00:58:41,715 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2020-12-23 00:58:41,745 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:58:41,749 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:58:41,752 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:58:41,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:58:41,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257579015] [2020-12-23 00:58:41,772 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:58:41,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174120227] [2020-12-23 00:58:41,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:58:41,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-23 00:58:41,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053037331] [2020-12-23 00:58:41,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:58:41,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:58:41,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:58:41,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:58:41,775 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 13 states. [2020-12-23 00:58:42,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:58:42,246 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2020-12-23 00:58:42,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 00:58:42,246 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2020-12-23 00:58:42,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:58:42,249 INFO L225 Difference]: With dead ends: 59 [2020-12-23 00:58:42,249 INFO L226 Difference]: Without dead ends: 55 [2020-12-23 00:58:42,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:58:42,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-23 00:58:42,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 41. [2020-12-23 00:58:42,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 00:58:42,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-12-23 00:58:42,259 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 27 [2020-12-23 00:58:42,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:58:42,259 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-12-23 00:58:42,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:58:42,260 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-12-23 00:58:42,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 00:58:42,261 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:58:42,261 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, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:58:42,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:58:42,476 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:58:42,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:58:42,477 INFO L82 PathProgramCache]: Analyzing trace with hash -424683228, now seen corresponding path program 1 times [2020-12-23 00:58:42,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:58:42,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336367534] [2020-12-23 00:58:42,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:58:42,492 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:58:42,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [64134117] [2020-12-23 00:58:42,493 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 00:58:42,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:58:42,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 00:58:42,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:58:42,665 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:58:42,667 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:58:42,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 00:58:42,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336367534] [2020-12-23 00:58:42,745 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:58:42,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64134117] [2020-12-23 00:58:42,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:58:42,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 00:58:42,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777403975] [2020-12-23 00:58:42,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:58:42,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:58:42,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:58:42,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:58:42,748 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 9 states. [2020-12-23 00:58:43,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:58:43,223 INFO L93 Difference]: Finished difference Result 111 states and 133 transitions. [2020-12-23 00:58:43,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:58:43,224 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-12-23 00:58:43,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:58:43,225 INFO L225 Difference]: With dead ends: 111 [2020-12-23 00:58:43,225 INFO L226 Difference]: Without dead ends: 93 [2020-12-23 00:58:43,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:58:43,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-23 00:58:43,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 62. [2020-12-23 00:58:43,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-23 00:58:43,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2020-12-23 00:58:43,237 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 27 [2020-12-23 00:58:43,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:58:43,238 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2020-12-23 00:58:43,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:58:43,238 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2020-12-23 00:58:43,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 00:58:43,239 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:58:43,239 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:58:43,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:58:43,453 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:58:43,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:58:43,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1341432964, now seen corresponding path program 2 times [2020-12-23 00:58:43,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:58:43,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246136004] [2020-12-23 00:58:43,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:58:43,468 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:58:43,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890464847] [2020-12-23 00:58:43,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:58:43,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:58:43,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:58:43,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:58:43,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:58:43,613 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:58:43,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246136004] [2020-12-23 00:58:43,614 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:58:43,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890464847] [2020-12-23 00:58:43,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:58:43,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 00:58:43,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240787336] [2020-12-23 00:58:43,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:58:43,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:58:43,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:58:43,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:58:43,616 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand 7 states. [2020-12-23 00:58:43,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:58:43,760 INFO L93 Difference]: Finished difference Result 145 states and 170 transitions. [2020-12-23 00:58:43,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:58:43,761 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-12-23 00:58:43,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:58:43,762 INFO L225 Difference]: With dead ends: 145 [2020-12-23 00:58:43,763 INFO L226 Difference]: Without dead ends: 109 [2020-12-23 00:58:43,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:58:43,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-23 00:58:43,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 76. [2020-12-23 00:58:43,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 00:58:43,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 90 transitions. [2020-12-23 00:58:43,777 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 90 transitions. Word has length 29 [2020-12-23 00:58:43,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:58:43,777 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 90 transitions. [2020-12-23 00:58:43,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:58:43,778 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 90 transitions. [2020-12-23 00:58:43,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 00:58:43,779 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:58:43,779 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:58:43,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 00:58:43,994 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:58:43,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:58:43,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1178743750, now seen corresponding path program 2 times [2020-12-23 00:58:43,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:58:43,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046541712] [2020-12-23 00:58:43,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:58:44,008 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:58:44,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1751335596] [2020-12-23 00:58:44,009 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 00:58:44,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:58:44,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:58:44,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:58:44,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:58:44,151 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:58:44,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046541712] [2020-12-23 00:58:44,152 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:58:44,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751335596] [2020-12-23 00:58:44,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:58:44,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 00:58:44,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051479662] [2020-12-23 00:58:44,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:58:44,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:58:44,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:58:44,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:58:44,154 INFO L87 Difference]: Start difference. First operand 76 states and 90 transitions. Second operand 7 states. [2020-12-23 00:58:44,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:58:44,298 INFO L93 Difference]: Finished difference Result 121 states and 138 transitions. [2020-12-23 00:58:44,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:58:44,299 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-12-23 00:58:44,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:58:44,300 INFO L225 Difference]: With dead ends: 121 [2020-12-23 00:58:44,300 INFO L226 Difference]: Without dead ends: 85 [2020-12-23 00:58:44,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:58:44,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-23 00:58:44,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-12-23 00:58:44,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 00:58:44,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2020-12-23 00:58:44,311 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 29 [2020-12-23 00:58:44,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:58:44,311 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2020-12-23 00:58:44,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:58:44,312 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2020-12-23 00:58:44,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 00:58:44,313 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:58:44,313 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:58:44,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:58:44,528 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:58:44,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:58:44,529 INFO L82 PathProgramCache]: Analyzing trace with hash 341499558, now seen corresponding path program 3 times [2020-12-23 00:58:44,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:58:44,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198678926] [2020-12-23 00:58:44,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:58:44,545 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:58:44,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1691232732] [2020-12-23 00:58:44,549 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 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 00:58:44,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 00:58:44,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:58:44,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:58:44,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:58:44,717 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 00:58:44,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198678926] [2020-12-23 00:58:44,718 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:58:44,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691232732] [2020-12-23 00:58:44,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:58:44,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 00:58:44,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417228508] [2020-12-23 00:58:44,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:58:44,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:58:44,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:58:44,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:58:44,721 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand 7 states. [2020-12-23 00:58:44,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:58:44,884 INFO L93 Difference]: Finished difference Result 116 states and 135 transitions. [2020-12-23 00:58:44,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:58:44,885 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-12-23 00:58:44,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:58:44,889 INFO L225 Difference]: With dead ends: 116 [2020-12-23 00:58:44,889 INFO L226 Difference]: Without dead ends: 96 [2020-12-23 00:58:44,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:58:44,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-23 00:58:44,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 78. [2020-12-23 00:58:44,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-23 00:58:44,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2020-12-23 00:58:44,919 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 31 [2020-12-23 00:58:44,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:58:44,920 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2020-12-23 00:58:44,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:58:44,920 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2020-12-23 00:58:44,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 00:58:44,921 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:58:44,921 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, 1, 1, 1, 1, 1] [2020-12-23 00:58:45,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:58:45,136 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:58:45,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:58:45,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1431065821, now seen corresponding path program 4 times [2020-12-23 00:58:45,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:58:45,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150426443] [2020-12-23 00:58:45,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:58:45,150 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:58:45,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1839073807] [2020-12-23 00:58:45,150 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 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 00:58:45,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:58:45,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:58:45,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:58:45,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:58:45,275 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 00:58:45,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150426443] [2020-12-23 00:58:45,275 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:58:45,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839073807] [2020-12-23 00:58:45,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:58:45,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 00:58:45,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153787437] [2020-12-23 00:58:45,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:58:45,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:58:45,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:58:45,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:58:45,278 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand 7 states. [2020-12-23 00:58:45,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:58:45,441 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2020-12-23 00:58:45,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:58:45,441 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-12-23 00:58:45,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:58:45,442 INFO L225 Difference]: With dead ends: 96 [2020-12-23 00:58:45,442 INFO L226 Difference]: Without dead ends: 80 [2020-12-23 00:58:45,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:58:45,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-23 00:58:45,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2020-12-23 00:58:45,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 00:58:45,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2020-12-23 00:58:45,454 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 32 [2020-12-23 00:58:45,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:58:45,454 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2020-12-23 00:58:45,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:58:45,455 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2020-12-23 00:58:45,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 00:58:45,456 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:58:45,456 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:58:45,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 00:58:45,672 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:58:45,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:58:45,673 INFO L82 PathProgramCache]: Analyzing trace with hash -2018611585, now seen corresponding path program 1 times [2020-12-23 00:58:45,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:58:45,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624619418] [2020-12-23 00:58:45,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:58:45,685 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:58:45,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [43254661] [2020-12-23 00:58:45,686 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 00:58:45,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:58:45,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 00:58:45,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:58:46,085 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 24 treesize of output 20 [2020-12-23 00:58:46,086 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:58:46,104 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:58:46,112 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 00:58:46,112 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:44 [2020-12-23 00:58:46,323 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:58:46,324 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 37 treesize of output 97 [2020-12-23 00:58:46,327 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:58:46,375 INFO L625 ElimStorePlain]: treesize reduction 57, result has 47.2 percent of original size [2020-12-23 00:58:46,380 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-23 00:58:46,380 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:55, output treesize:51 [2020-12-23 00:58:46,592 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:58:46,592 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2020-12-23 00:58:46,594 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:58:46,596 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 00:58:46,621 INFO L625 ElimStorePlain]: treesize reduction 13, result has 59.4 percent of original size [2020-12-23 00:58:46,623 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:58:46,623 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:39, output treesize:10 [2020-12-23 00:58:46,654 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:58:46,656 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:58:46,686 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:58:46,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624619418] [2020-12-23 00:58:46,686 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:58:46,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43254661] [2020-12-23 00:58:46,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:58:46,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-12-23 00:58:46,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917140866] [2020-12-23 00:58:46,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 00:58:46,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:58:46,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 00:58:46,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:58:46,689 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand 20 states. [2020-12-23 00:58:48,029 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2020-12-23 00:58:48,200 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 36 [2020-12-23 00:58:48,362 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 36 [2020-12-23 00:58:48,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:58:48,504 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2020-12-23 00:58:48,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 00:58:48,504 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 34 [2020-12-23 00:58:48,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:58:48,505 INFO L225 Difference]: With dead ends: 79 [2020-12-23 00:58:48,505 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 00:58:48,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=392, Invalid=1248, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 00:58:48,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 00:58:48,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-12-23 00:58:48,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 00:58:48,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2020-12-23 00:58:48,514 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 34 [2020-12-23 00:58:48,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:58:48,515 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2020-12-23 00:58:48,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 00:58:48,515 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2020-12-23 00:58:48,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 00:58:48,516 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:58:48,516 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 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 00:58:48,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:58:48,732 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:58:48,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:58:48,733 INFO L82 PathProgramCache]: Analyzing trace with hash -2016456940, now seen corresponding path program 5 times [2020-12-23 00:58:48,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:58:48,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254115237] [2020-12-23 00:58:48,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:58:48,745 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:58:48,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [873709319] [2020-12-23 00:58:48,747 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true