/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-multidimensional/init-non-constant-2-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:55:40,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:55:40,899 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:55:40,941 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:55:40,942 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:55:40,947 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:55:40,951 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:55:40,957 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:55:40,961 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:55:40,967 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:55:40,971 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:55:40,973 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:55:40,974 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:55:40,977 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:55:40,979 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:55:40,982 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:55:40,983 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:55:40,987 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:55:40,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:55:41,003 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:55:41,006 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:55:41,009 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:55:41,011 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:55:41,014 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:55:41,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:55:41,061 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:55:41,062 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:55:41,063 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:55:41,069 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 00:55:41,118 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:55:41,118 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:55:41,122 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:55:41,123 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:55:41,123 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:55:41,123 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:55:41,123 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:55:41,124 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:55:41,124 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:55:41,124 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:55:41,125 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:55:41,126 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:55:41,126 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:55:41,126 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:55:41,127 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:55:41,127 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:55:41,127 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:55:41,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:55:41,128 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:55:41,128 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:55:41,128 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:55:41,129 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:55:41,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:55:41,129 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:55:41,130 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:55:41,130 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:55:41,568 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:55:41,600 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:55:41,604 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:55:41,606 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:55:41,607 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:55:41,608 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c [2020-12-23 00:55:41,700 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c6c921318/705e9076134b40e59627721f0f4cb182/FLAGe0f7364b6 [2020-12-23 00:55:42,323 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:55:42,323 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c [2020-12-23 00:55:42,331 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c6c921318/705e9076134b40e59627721f0f4cb182/FLAGe0f7364b6 [2020-12-23 00:55:42,706 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c6c921318/705e9076134b40e59627721f0f4cb182 [2020-12-23 00:55:42,709 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:55:42,712 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:55:42,714 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:55:42,714 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:55:42,718 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:55:42,719 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:55:42" (1/1) ... [2020-12-23 00:55:42,720 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ca0087b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:55:42, skipping insertion in model container [2020-12-23 00:55:42,720 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:55:42" (1/1) ... [2020-12-23 00:55:42,730 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:55:42,749 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:55:42,909 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-multidimensional/init-non-constant-2-n-u.c[421,434] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: ArrayLHS[ArrayLHS[VariableLHS[~A~0,],[IdentifierExpression[~i~0,]]],[IdentifierExpression[~j~0,]]] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:55:42,932 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:55:42,942 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:55:42,955 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-multidimensional/init-non-constant-2-n-u.c[421,434] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#A~0,],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#A~0,],offset],BinaryExpression[ARITHMUL,IdentifierExpression[~i~0,],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~n~0,]]]],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~j~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:55:42,966 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:55:42,983 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:55:42,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:55:42 WrapperNode [2020-12-23 00:55:42,983 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:55:42,985 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:55:42,985 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:55:42,985 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:55:42,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:55:42" (1/1) ... [2020-12-23 00:55:43,000 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:55:42" (1/1) ... [2020-12-23 00:55:43,020 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:55:43,021 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:55:43,021 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:55:43,021 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:55:43,031 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:55:42" (1/1) ... [2020-12-23 00:55:43,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:55:42" (1/1) ... [2020-12-23 00:55:43,033 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:55:42" (1/1) ... [2020-12-23 00:55:43,034 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:55:42" (1/1) ... [2020-12-23 00:55:43,040 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:55:42" (1/1) ... [2020-12-23 00:55:43,046 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:55:42" (1/1) ... [2020-12-23 00:55:43,047 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:55:42" (1/1) ... [2020-12-23 00:55:43,050 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:55:43,051 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:55:43,051 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:55:43,051 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:55:43,052 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:55:42" (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 00:55:43,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:55:43,180 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:55:43,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:55:43,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:55:43,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:55:43,181 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:55:43,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:55:43,519 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:55:43,520 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2020-12-23 00:55:43,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:55:43 BoogieIcfgContainer [2020-12-23 00:55:43,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:55:43,532 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:55:43,532 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:55:43,538 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:55:43,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:55:42" (1/3) ... [2020-12-23 00:55:43,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eed2580 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:55:43, skipping insertion in model container [2020-12-23 00:55:43,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:55:42" (2/3) ... [2020-12-23 00:55:43,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eed2580 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:55:43, skipping insertion in model container [2020-12-23 00:55:43,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:55:43" (3/3) ... [2020-12-23 00:55:43,544 INFO L111 eAbstractionObserver]: Analyzing ICFG init-non-constant-2-n-u.c [2020-12-23 00:55:43,552 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:55:43,558 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:55:43,587 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:55:43,638 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:55:43,639 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:55:43,639 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:55:43,639 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:55:43,639 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:55:43,640 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:55:43,640 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:55:43,640 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:55:43,662 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-23 00:55:43,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 00:55:43,671 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:55:43,672 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:55:43,672 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:55:43,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:55:43,681 INFO L82 PathProgramCache]: Analyzing trace with hash 523505315, now seen corresponding path program 1 times [2020-12-23 00:55:43,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:55:43,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825960604] [2020-12-23 00:55:43,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:55:43,850 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:55:43,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [627336542] [2020-12-23 00:55:43,851 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 00:55:43,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:55:43,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-23 00:55:44,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:55:44,036 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 00:55:44,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825960604] [2020-12-23 00:55:44,037 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:55:44,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627336542] [2020-12-23 00:55:44,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:55:44,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:55:44,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236709876] [2020-12-23 00:55:44,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:55:44,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:55:44,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:55:44,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:55:44,066 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-12-23 00:55:44,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:55:44,088 INFO L93 Difference]: Finished difference Result 37 states and 56 transitions. [2020-12-23 00:55:44,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:55:44,090 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-23 00:55:44,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:55:44,099 INFO L225 Difference]: With dead ends: 37 [2020-12-23 00:55:44,100 INFO L226 Difference]: Without dead ends: 16 [2020-12-23 00:55:44,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 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 00:55:44,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-23 00:55:44,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-23 00:55:44,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 00:55:44,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2020-12-23 00:55:44,144 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2020-12-23 00:55:44,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:55:44,145 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2020-12-23 00:55:44,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:55:44,145 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2020-12-23 00:55:44,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 00:55:44,146 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:55:44,146 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:55:44,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-23 00:55:44,361 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:55:44,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:55:44,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1316396249, now seen corresponding path program 1 times [2020-12-23 00:55:44,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:55:44,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914277263] [2020-12-23 00:55:44,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:55:44,383 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:55:44,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1957225626] [2020-12-23 00:55:44,384 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 00:55:44,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:55:44,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:55:44,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:55:44,554 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 00:55:44,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914277263] [2020-12-23 00:55:44,555 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:55:44,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957225626] [2020-12-23 00:55:44,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:55:44,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 00:55:44,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592966560] [2020-12-23 00:55:44,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:55:44,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:55:44,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:55:44,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:55:44,560 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 5 states. [2020-12-23 00:55:44,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:55:44,632 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-12-23 00:55:44,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:55:44,633 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-23 00:55:44,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:55:44,634 INFO L225 Difference]: With dead ends: 35 [2020-12-23 00:55:44,634 INFO L226 Difference]: Without dead ends: 26 [2020-12-23 00:55:44,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:55:44,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-23 00:55:44,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 17. [2020-12-23 00:55:44,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 00:55:44,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-12-23 00:55:44,641 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2020-12-23 00:55:44,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:55:44,642 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-12-23 00:55:44,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:55:44,642 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-12-23 00:55:44,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 00:55:44,643 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:55:44,643 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:55:44,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:55:44,859 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:55:44,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:55:44,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1285873139, now seen corresponding path program 1 times [2020-12-23 00:55:44,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:55:44,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168527891] [2020-12-23 00:55:44,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:55:44,888 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:55:44,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [99720113] [2020-12-23 00:55:44,889 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 00:55:44,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:55:44,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:55:44,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:55:45,038 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 00:55:45,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168527891] [2020-12-23 00:55:45,043 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:55:45,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99720113] [2020-12-23 00:55:45,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:55:45,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 00:55:45,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451408702] [2020-12-23 00:55:45,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:55:45,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:55:45,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:55:45,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:55:45,047 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 5 states. [2020-12-23 00:55:45,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:55:45,155 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2020-12-23 00:55:45,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:55:45,156 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-23 00:55:45,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:55:45,157 INFO L225 Difference]: With dead ends: 47 [2020-12-23 00:55:45,157 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 00:55:45,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:55:45,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 00:55:45,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2020-12-23 00:55:45,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 00:55:45,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-12-23 00:55:45,164 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 14 [2020-12-23 00:55:45,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:55:45,164 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-12-23 00:55:45,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:55:45,165 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-12-23 00:55:45,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 00:55:45,165 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:55:45,166 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:55:45,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:55:45,381 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:55:45,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:55:45,382 INFO L82 PathProgramCache]: Analyzing trace with hash -104390634, now seen corresponding path program 1 times [2020-12-23 00:55:45,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:55:45,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549795390] [2020-12-23 00:55:45,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:55:45,395 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:55:45,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1983701933] [2020-12-23 00:55:45,395 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 00:55:45,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:55:45,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 00:55:45,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:55:45,578 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 00:55:45,581 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:55:45,591 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:55:45,592 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:55:45,593 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-12-23 00:55:45,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:55:45,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549795390] [2020-12-23 00:55:45,696 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:55:45,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983701933] [2020-12-23 00:55:45,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:55:45,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 00:55:45,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982662211] [2020-12-23 00:55:45,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:55:45,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:55:45,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:55:45,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:55:45,700 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 9 states. [2020-12-23 00:55:46,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:55:46,028 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2020-12-23 00:55:46,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:55:46,029 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-12-23 00:55:46,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:55:46,031 INFO L225 Difference]: With dead ends: 49 [2020-12-23 00:55:46,031 INFO L226 Difference]: Without dead ends: 47 [2020-12-23 00:55:46,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:55:46,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-23 00:55:46,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 27. [2020-12-23 00:55:46,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 00:55:46,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-12-23 00:55:46,051 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 15 [2020-12-23 00:55:46,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:55:46,052 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-12-23 00:55:46,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:55:46,052 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-12-23 00:55:46,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 00:55:46,055 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:55:46,055 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:55:46,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:55:46,269 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:55:46,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:55:46,271 INFO L82 PathProgramCache]: Analyzing trace with hash -340200154, now seen corresponding path program 1 times [2020-12-23 00:55:46,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:55:46,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34497949] [2020-12-23 00:55:46,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:55:46,283 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:55:46,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [747577913] [2020-12-23 00:55:46,284 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 00:55:46,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:55:46,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:55:46,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:55:46,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:55:46,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34497949] [2020-12-23 00:55:46,445 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:55:46,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747577913] [2020-12-23 00:55:46,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:55:46,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 00:55:46,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995475900] [2020-12-23 00:55:46,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:55:46,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:55:46,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:55:46,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:55:46,448 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 7 states. [2020-12-23 00:55:46,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:55:46,562 INFO L93 Difference]: Finished difference Result 77 states and 93 transitions. [2020-12-23 00:55:46,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:55:46,563 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-12-23 00:55:46,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:55:46,564 INFO L225 Difference]: With dead ends: 77 [2020-12-23 00:55:46,564 INFO L226 Difference]: Without dead ends: 64 [2020-12-23 00:55:46,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 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 00:55:46,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-23 00:55:46,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 49. [2020-12-23 00:55:46,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-23 00:55:46,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2020-12-23 00:55:46,576 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 18 [2020-12-23 00:55:46,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:55:46,577 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2020-12-23 00:55:46,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:55:46,577 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2020-12-23 00:55:46,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 00:55:46,578 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:55:46,578 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:55:46,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:55:46,787 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:55:46,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:55:46,788 INFO L82 PathProgramCache]: Analyzing trace with hash -606638647, now seen corresponding path program 2 times [2020-12-23 00:55:46,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:55:46,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227268008] [2020-12-23 00:55:46,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:55:46,800 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:55:46,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1017517093] [2020-12-23 00:55:46,801 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 00:55:46,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:55:46,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:55:46,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 00:55:46,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:55:46,993 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 15 treesize of output 11 [2020-12-23 00:55:46,994 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:55:47,000 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:55:47,001 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:55:47,001 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-12-23 00:55:47,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:55:47,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227268008] [2020-12-23 00:55:47,242 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:55:47,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017517093] [2020-12-23 00:55:47,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:55:47,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-23 00:55:47,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720211301] [2020-12-23 00:55:47,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 00:55:47,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:55:47,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 00:55:47,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:55:47,244 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand 12 states. [2020-12-23 00:55:47,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:55:47,568 INFO L93 Difference]: Finished difference Result 86 states and 105 transitions. [2020-12-23 00:55:47,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:55:47,569 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-12-23 00:55:47,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:55:47,570 INFO L225 Difference]: With dead ends: 86 [2020-12-23 00:55:47,570 INFO L226 Difference]: Without dead ends: 84 [2020-12-23 00:55:47,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:55:47,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-23 00:55:47,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 52. [2020-12-23 00:55:47,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 00:55:47,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2020-12-23 00:55:47,583 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 19 [2020-12-23 00:55:47,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:55:47,583 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2020-12-23 00:55:47,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 00:55:47,584 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2020-12-23 00:55:47,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 00:55:47,585 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:55:47,585 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:55:47,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:55:47,799 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:55:47,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:55:47,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1106169221, now seen corresponding path program 2 times [2020-12-23 00:55:47,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:55:47,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883718379] [2020-12-23 00:55:47,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:55:47,813 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:55:47,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [663098079] [2020-12-23 00:55:47,814 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 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 00:55:47,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:55:47,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:55:47,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 00:55:47,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:55:48,049 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:55:48,050 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 72 [2020-12-23 00:55:48,057 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:55:48,101 INFO L625 ElimStorePlain]: treesize reduction 28, result has 62.7 percent of original size [2020-12-23 00:55:48,108 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 00:55:48,109 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:22 [2020-12-23 00:55:52,249 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:55:52,249 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 31 treesize of output 67 [2020-12-23 00:55:52,253 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:55:52,289 INFO L625 ElimStorePlain]: treesize reduction 35, result has 50.7 percent of original size [2020-12-23 00:55:52,295 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 00:55:52,295 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:36 [2020-12-23 00:55:52,501 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:55:52,514 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:55:52,521 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:55:52,538 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:55:52,544 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:55:52,558 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:55:52,589 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:55:52,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883718379] [2020-12-23 00:55:52,602 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:55:52,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663098079] [2020-12-23 00:55:52,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:55:52,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-23 00:55:52,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593193783] [2020-12-23 00:55:52,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:55:52,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:55:52,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:55:52,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=120, Unknown=2, NotChecked=0, Total=156 [2020-12-23 00:55:52,604 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand 13 states. [2020-12-23 00:56:07,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:56:07,597 INFO L93 Difference]: Finished difference Result 104 states and 125 transitions. [2020-12-23 00:56:07,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 00:56:07,598 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 19 [2020-12-23 00:56:07,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:56:07,600 INFO L225 Difference]: With dead ends: 104 [2020-12-23 00:56:07,600 INFO L226 Difference]: Without dead ends: 102 [2020-12-23 00:56:07,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=79, Invalid=299, Unknown=2, NotChecked=0, Total=380 [2020-12-23 00:56:07,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-23 00:56:07,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 52. [2020-12-23 00:56:07,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 00:56:07,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2020-12-23 00:56:07,620 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 19 [2020-12-23 00:56:07,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:56:07,620 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2020-12-23 00:56:07,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:56:07,620 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2020-12-23 00:56:07,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 00:56:07,621 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:56:07,621 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:56:07,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:56:07,823 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:56:07,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:56:07,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1173496307, now seen corresponding path program 1 times [2020-12-23 00:56:07,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:56:07,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991553470] [2020-12-23 00:56:07,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:56:07,843 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:56:07,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [550945214] [2020-12-23 00:56:07,847 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 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 00:56:07,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:56:07,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:56:07,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:56:07,970 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 00:56:07,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991553470] [2020-12-23 00:56:07,972 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:56:07,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550945214] [2020-12-23 00:56:07,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:56:07,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 00:56:07,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420405320] [2020-12-23 00:56:07,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:56:07,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:56:07,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:56:07,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:56:07,983 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand 7 states. [2020-12-23 00:56:08,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:56:08,100 INFO L93 Difference]: Finished difference Result 121 states and 147 transitions. [2020-12-23 00:56:08,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:56:08,101 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-12-23 00:56:08,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:56:08,103 INFO L225 Difference]: With dead ends: 121 [2020-12-23 00:56:08,103 INFO L226 Difference]: Without dead ends: 94 [2020-12-23 00:56:08,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 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 00:56:08,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-23 00:56:08,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 57. [2020-12-23 00:56:08,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 00:56:08,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2020-12-23 00:56:08,138 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 21 [2020-12-23 00:56:08,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:56:08,139 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2020-12-23 00:56:08,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:56:08,139 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2020-12-23 00:56:08,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 00:56:08,147 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:56:08,147 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:56:08,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-23 00:56:08,361 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:56:08,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:56:08,362 INFO L82 PathProgramCache]: Analyzing trace with hash 855303827, now seen corresponding path program 3 times [2020-12-23 00:56:08,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:56:08,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747690567] [2020-12-23 00:56:08,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:56:08,371 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:56:08,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1725498006] [2020-12-23 00:56:08,372 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 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 00:56:08,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 00:56:08,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:56:08,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:56:08,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:56:08,547 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:56:08,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747690567] [2020-12-23 00:56:08,548 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:56:08,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725498006] [2020-12-23 00:56:08,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:56:08,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 00:56:08,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719265520] [2020-12-23 00:56:08,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:56:08,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:56:08,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:56:08,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:56:08,556 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand 9 states. [2020-12-23 00:56:08,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:56:08,760 INFO L93 Difference]: Finished difference Result 154 states and 186 transitions. [2020-12-23 00:56:08,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:56:08,760 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-12-23 00:56:08,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:56:08,761 INFO L225 Difference]: With dead ends: 154 [2020-12-23 00:56:08,762 INFO L226 Difference]: Without dead ends: 108 [2020-12-23 00:56:08,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:56:08,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-23 00:56:08,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 82. [2020-12-23 00:56:08,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-23 00:56:08,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 103 transitions. [2020-12-23 00:56:08,813 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 103 transitions. Word has length 22 [2020-12-23 00:56:08,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:56:08,815 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 103 transitions. [2020-12-23 00:56:08,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:56:08,815 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 103 transitions. [2020-12-23 00:56:08,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 00:56:08,816 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:56:08,816 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:56:09,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:56:09,030 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:56:09,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:56:09,030 INFO L82 PathProgramCache]: Analyzing trace with hash -2011802186, now seen corresponding path program 4 times [2020-12-23 00:56:09,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:56:09,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166283866] [2020-12-23 00:56:09,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:56:09,047 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:56:09,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1332893365] [2020-12-23 00:56:09,048 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 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 00:56:09,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:56:09,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:56:09,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 00:56:09,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:56:09,430 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 25 treesize of output 21 [2020-12-23 00:56:09,432 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:56:09,443 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:56:09,444 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:56:09,445 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:32 [2020-12-23 00:56:09,493 INFO L348 Elim1Store]: treesize reduction 71, result has 19.3 percent of original size [2020-12-23 00:56:09,495 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 48 treesize of output 47 [2020-12-23 00:56:09,497 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:56:09,511 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:56:09,512 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:56:09,519 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:54 [2020-12-23 00:56:09,587 INFO L348 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2020-12-23 00:56:09,587 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 34 treesize of output 36 [2020-12-23 00:56:09,590 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:56:09,601 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:56:09,602 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:56:09,605 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2020-12-23 00:56:09,921 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:56:09,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166283866] [2020-12-23 00:56:09,922 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:56:09,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332893365] [2020-12-23 00:56:09,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:56:09,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-12-23 00:56:09,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353840186] [2020-12-23 00:56:09,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 00:56:09,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:56:09,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 00:56:09,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:56:09,924 INFO L87 Difference]: Start difference. First operand 82 states and 103 transitions. Second operand 14 states. [2020-12-23 00:56:10,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:56:10,432 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2020-12-23 00:56:10,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 00:56:10,433 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2020-12-23 00:56:10,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:56:10,435 INFO L225 Difference]: With dead ends: 92 [2020-12-23 00:56:10,435 INFO L226 Difference]: Without dead ends: 90 [2020-12-23 00:56:10,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:56:10,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-23 00:56:10,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2020-12-23 00:56:10,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-23 00:56:10,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 106 transitions. [2020-12-23 00:56:10,455 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 106 transitions. Word has length 23 [2020-12-23 00:56:10,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:56:10,455 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 106 transitions. [2020-12-23 00:56:10,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 00:56:10,456 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 106 transitions. [2020-12-23 00:56:10,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 00:56:10,456 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:56:10,457 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:56:10,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:56:10,665 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:56:10,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:56:10,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1831911179, now seen corresponding path program 5 times [2020-12-23 00:56:10,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:56:10,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259506987] [2020-12-23 00:56:10,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:56:10,676 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:56:10,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1815789290] [2020-12-23 00:56:10,677 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 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 00:56:10,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 00:56:10,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:56:10,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 00:56:10,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:56:10,910 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 21 treesize of output 17 [2020-12-23 00:56:10,911 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:56:10,920 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:56:10,921 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:56:10,921 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2020-12-23 00:56:10,989 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:56:10,989 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 82 [2020-12-23 00:56:10,993 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:56:11,023 INFO L625 ElimStorePlain]: treesize reduction 39, result has 50.6 percent of original size [2020-12-23 00:56:11,023 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:56:11,024 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:40 [2020-12-23 00:56:11,098 INFO L348 Elim1Store]: treesize reduction 54, result has 50.5 percent of original size [2020-12-23 00:56:11,098 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 43 treesize of output 79 [2020-12-23 00:56:11,103 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:56:11,153 INFO L625 ElimStorePlain]: treesize reduction 18, result has 71.4 percent of original size [2020-12-23 00:56:11,155 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:56:11,155 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:45 [2020-12-23 00:56:11,617 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:56:11,664 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:56:11,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259506987] [2020-12-23 00:56:11,664 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:56:11,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815789290] [2020-12-23 00:56:11,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:56:11,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-12-23 00:56:11,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770458819] [2020-12-23 00:56:11,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 00:56:11,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:56:11,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 00:56:11,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:56:11,667 INFO L87 Difference]: Start difference. First operand 85 states and 106 transitions. Second operand 16 states. [2020-12-23 00:56:12,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:56:12,809 INFO L93 Difference]: Finished difference Result 168 states and 205 transitions. [2020-12-23 00:56:12,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 00:56:12,810 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2020-12-23 00:56:12,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:56:12,811 INFO L225 Difference]: With dead ends: 168 [2020-12-23 00:56:12,812 INFO L226 Difference]: Without dead ends: 166 [2020-12-23 00:56:12,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2020-12-23 00:56:12,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-12-23 00:56:12,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 110. [2020-12-23 00:56:12,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-23 00:56:12,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 137 transitions. [2020-12-23 00:56:12,840 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 137 transitions. Word has length 24 [2020-12-23 00:56:12,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:56:12,841 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 137 transitions. [2020-12-23 00:56:12,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 00:56:12,841 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 137 transitions. [2020-12-23 00:56:12,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 00:56:12,845 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:56:12,845 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:56:13,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 00:56:13,060 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:56:13,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:56:13,061 INFO L82 PathProgramCache]: Analyzing trace with hash 448249890, now seen corresponding path program 2 times [2020-12-23 00:56:13,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:56:13,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392823416] [2020-12-23 00:56:13,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:56:13,071 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:56:13,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1636910275] [2020-12-23 00:56:13,071 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 00:56:13,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:56:13,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:56:13,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 00:56:13,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:56:13,208 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 17 treesize of output 13 [2020-12-23 00:56:13,209 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:56:13,216 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:56:13,216 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:56:13,217 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-23 00:56:13,372 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 00:56:13,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392823416] [2020-12-23 00:56:13,373 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:56:13,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636910275] [2020-12-23 00:56:13,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:56:13,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-23 00:56:13,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201021246] [2020-12-23 00:56:13,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:56:13,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:56:13,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:56:13,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:56:13,376 INFO L87 Difference]: Start difference. First operand 110 states and 137 transitions. Second operand 11 states. [2020-12-23 00:56:13,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:56:13,726 INFO L93 Difference]: Finished difference Result 210 states and 260 transitions. [2020-12-23 00:56:13,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 00:56:13,727 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-12-23 00:56:13,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:56:13,729 INFO L225 Difference]: With dead ends: 210 [2020-12-23 00:56:13,729 INFO L226 Difference]: Without dead ends: 208 [2020-12-23 00:56:13,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:56:13,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-12-23 00:56:13,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 137. [2020-12-23 00:56:13,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-23 00:56:13,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 172 transitions. [2020-12-23 00:56:13,764 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 172 transitions. Word has length 25 [2020-12-23 00:56:13,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:56:13,766 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 172 transitions. [2020-12-23 00:56:13,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:56:13,767 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 172 transitions. [2020-12-23 00:56:13,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 00:56:13,767 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:56:13,767 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:56:13,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:56:13,982 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:56:13,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:56:13,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1620419706, now seen corresponding path program 6 times [2020-12-23 00:56:13,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:56:13,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774682355] [2020-12-23 00:56:13,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:56:13,991 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:56:13,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1195200156] [2020-12-23 00:56:13,992 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 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 00:56:14,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-23 00:56:14,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:56:14,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:56:14,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:56:14,253 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:56:14,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774682355] [2020-12-23 00:56:14,254 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:56:14,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195200156] [2020-12-23 00:56:14,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:56:14,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-23 00:56:14,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932962812] [2020-12-23 00:56:14,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:56:14,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:56:14,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:56:14,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:56:14,256 INFO L87 Difference]: Start difference. First operand 137 states and 172 transitions. Second operand 11 states. [2020-12-23 00:56:14,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:56:14,552 INFO L93 Difference]: Finished difference Result 334 states and 422 transitions. [2020-12-23 00:56:14,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 00:56:14,553 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-12-23 00:56:14,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:56:14,555 INFO L225 Difference]: With dead ends: 334 [2020-12-23 00:56:14,555 INFO L226 Difference]: Without dead ends: 245 [2020-12-23 00:56:14,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:56:14,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-12-23 00:56:14,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 189. [2020-12-23 00:56:14,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-12-23 00:56:14,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 246 transitions. [2020-12-23 00:56:14,601 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 246 transitions. Word has length 26 [2020-12-23 00:56:14,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:56:14,601 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 246 transitions. [2020-12-23 00:56:14,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:56:14,601 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 246 transitions. [2020-12-23 00:56:14,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 00:56:14,620 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:56:14,620 INFO L422 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:56:14,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 00:56:14,831 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:56:14,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:56:14,832 INFO L82 PathProgramCache]: Analyzing trace with hash 454342103, now seen corresponding path program 7 times [2020-12-23 00:56:14,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:56:14,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642510050] [2020-12-23 00:56:14,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:56:14,843 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:56:14,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2072353662] [2020-12-23 00:56:14,843 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 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 00:56:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:56:15,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-23 00:56:15,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:56:15,272 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 21 treesize of output 17 [2020-12-23 00:56:15,273 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:56:15,284 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:56:15,286 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:56:15,286 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:27 [2020-12-23 00:56:15,330 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:56:15,330 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 41 treesize of output 98 [2020-12-23 00:56:15,334 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:56:15,368 INFO L625 ElimStorePlain]: treesize reduction 30, result has 60.5 percent of original size [2020-12-23 00:56:15,370 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 00:56:15,370 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:46 [2020-12-23 00:56:15,551 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:56:15,552 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 67 treesize of output 237 [2020-12-23 00:56:15,557 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:56:15,627 INFO L625 ElimStorePlain]: treesize reduction 90, result has 50.0 percent of original size [2020-12-23 00:56:15,634 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:56:15,638 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 00:56:15,638 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:79, output treesize:90 [2020-12-23 00:56:15,640 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:56:15,760 INFO L348 Elim1Store]: treesize reduction 74, result has 54.9 percent of original size [2020-12-23 00:56:15,760 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 55 treesize of output 117 [2020-12-23 00:56:15,766 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:56:15,807 INFO L625 ElimStorePlain]: treesize reduction 32, result has 65.2 percent of original size [2020-12-23 00:56:15,808 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:56:15,809 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:64, output treesize:60 [2020-12-23 00:56:15,925 INFO L348 Elim1Store]: treesize reduction 129, result has 34.2 percent of original size [2020-12-23 00:56:15,926 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 57 treesize of output 96 [2020-12-23 00:56:15,931 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:56:15,968 INFO L625 ElimStorePlain]: treesize reduction 28, result has 66.7 percent of original size [2020-12-23 00:56:15,969 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:56:15,970 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:56 [2020-12-23 00:56:16,468 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 00:56:16,513 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:56:16,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642510050] [2020-12-23 00:56:16,513 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:56:16,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072353662] [2020-12-23 00:56:16,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:56:16,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-12-23 00:56:16,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33502197] [2020-12-23 00:56:16,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 00:56:16,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:56:16,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 00:56:16,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:56:16,516 INFO L87 Difference]: Start difference. First operand 189 states and 246 transitions. Second operand 19 states. [2020-12-23 00:56:18,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:56:18,123 INFO L93 Difference]: Finished difference Result 239 states and 301 transitions. [2020-12-23 00:56:18,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 00:56:18,124 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 26 [2020-12-23 00:56:18,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:56:18,126 INFO L225 Difference]: With dead ends: 239 [2020-12-23 00:56:18,126 INFO L226 Difference]: Without dead ends: 237 [2020-12-23 00:56:18,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=158, Invalid=964, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:56:18,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-12-23 00:56:18,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 189. [2020-12-23 00:56:18,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-12-23 00:56:18,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 245 transitions. [2020-12-23 00:56:18,172 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 245 transitions. Word has length 26 [2020-12-23 00:56:18,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:56:18,173 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 245 transitions. [2020-12-23 00:56:18,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 00:56:18,173 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 245 transitions. [2020-12-23 00:56:18,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 00:56:18,174 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:56:18,174 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:56:18,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:56:18,389 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:56:18,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:56:18,390 INFO L82 PathProgramCache]: Analyzing trace with hash 220430633, now seen corresponding path program 8 times [2020-12-23 00:56:18,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:56:18,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325712815] [2020-12-23 00:56:18,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:56:18,399 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:56:18,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [860175553] [2020-12-23 00:56:18,399 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 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 00:56:18,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:56:18,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:56:18,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 00:56:18,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:56:18,792 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 15 treesize of output 11 [2020-12-23 00:56:18,793 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:56:18,799 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:56:18,799 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:56:18,800 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-12-23 00:56:19,028 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:56:19,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325712815] [2020-12-23 00:56:19,029 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:56:19,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860175553] [2020-12-23 00:56:19,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:56:19,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-12-23 00:56:19,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431004726] [2020-12-23 00:56:19,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 00:56:19,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:56:19,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 00:56:19,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:56:19,031 INFO L87 Difference]: Start difference. First operand 189 states and 245 transitions. Second operand 15 states. [2020-12-23 00:56:19,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:56:19,400 INFO L93 Difference]: Finished difference Result 198 states and 253 transitions. [2020-12-23 00:56:19,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 00:56:19,401 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-12-23 00:56:19,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:56:19,402 INFO L225 Difference]: With dead ends: 198 [2020-12-23 00:56:19,402 INFO L226 Difference]: Without dead ends: 196 [2020-12-23 00:56:19,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:56:19,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-12-23 00:56:19,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 192. [2020-12-23 00:56:19,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-12-23 00:56:19,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 248 transitions. [2020-12-23 00:56:19,443 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 248 transitions. Word has length 27 [2020-12-23 00:56:19,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:56:19,443 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 248 transitions. [2020-12-23 00:56:19,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 00:56:19,443 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 248 transitions. [2020-12-23 00:56:19,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 00:56:19,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:56:19,444 INFO L422 BasicCegarLoop]: trace histogram [8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:56:19,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 00:56:19,649 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:56:19,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:56:19,651 INFO L82 PathProgramCache]: Analyzing trace with hash -513846795, now seen corresponding path program 9 times [2020-12-23 00:56:19,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:56:19,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050922049] [2020-12-23 00:56:19,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:56:19,660 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:56:19,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [571860756] [2020-12-23 00:56:19,660 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 00:56:20,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 00:56:20,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:56:20,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-23 00:56:20,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:56:20,142 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-12-23 00:56:20,143 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:56:20,147 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-12-23 00:56:20,149 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:56:20,168 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:56:20,169 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2020-12-23 00:56:20,170 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:37, output treesize:27 [2020-12-23 00:56:20,244 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 21 treesize of output 17 [2020-12-23 00:56:20,245 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:56:20,258 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:56:20,259 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:56:20,260 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2020-12-23 00:56:20,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:20,293 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 39 treesize of output 38 [2020-12-23 00:56:20,295 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:56:20,313 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:56:20,315 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:56:20,315 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:47 [2020-12-23 00:56:20,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:20,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:20,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:20,363 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:56:20,364 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 38 treesize of output 40 [2020-12-23 00:56:20,366 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:56:20,385 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:56:20,386 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:56:20,387 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:43 [2020-12-23 00:56:20,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:20,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:20,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:20,499 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:56:20,500 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 202 [2020-12-23 00:56:20,506 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:56:20,678 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-12-23 00:56:20,679 INFO L625 ElimStorePlain]: treesize reduction 81, result has 55.5 percent of original size [2020-12-23 00:56:20,681 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:56:20,681 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:101 [2020-12-23 00:56:20,772 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 00:56:20,773 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:56:20,773 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:56:20,775 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:56:20,777 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 00:56:20,777 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 00:56:20,779 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 00:56:20,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:20,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:20,810 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 00:56:20,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:20,843 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 66 [2020-12-23 00:56:20,845 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:56:20,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:20,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:20,869 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 00:56:20,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:20,959 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 66 [2020-12-23 00:56:20,964 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:56:20,971 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-23 00:56:20,972 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-12-23 00:56:20,980 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-23 00:56:20,982 INFO L547 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-12-23 00:56:20,991 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-23 00:56:20,992 INFO L547 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-12-23 00:56:20,999 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-23 00:56:21,000 INFO L547 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2020-12-23 00:56:21,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:21,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:21,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:21,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:21,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:21,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:21,072 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 75 [2020-12-23 00:56:21,075 INFO L547 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2020-12-23 00:56:21,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:21,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:21,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:21,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:21,216 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:56:21,217 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 287 [2020-12-23 00:56:21,224 INFO L547 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2020-12-23 00:56:21,669 WARN L197 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2020-12-23 00:56:21,671 INFO L625 ElimStorePlain]: treesize reduction 201, result has 62.8 percent of original size [2020-12-23 00:56:21,676 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 4 xjuncts. [2020-12-23 00:56:21,676 INFO L244 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:721, output treesize:339 [2020-12-23 00:56:21,900 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-12-23 00:56:21,909 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-23 00:56:21,911 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 00:56:21,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:21,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:21,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:21,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:21,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:21,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:21,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:21,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:21,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:21,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:22,085 INFO L244 Elim1Store]: Index analysis took 150 ms [2020-12-23 00:56:22,101 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 100 [2020-12-23 00:56:22,104 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:56:22,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:22,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:22,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:22,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:22,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:22,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:22,323 INFO L244 Elim1Store]: Index analysis took 210 ms [2020-12-23 00:56:22,460 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-12-23 00:56:22,461 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:56:22,461 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 103 treesize of output 372 [2020-12-23 00:56:22,473 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:56:22,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:22,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:22,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:22,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:22,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:22,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:22,533 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 86 [2020-12-23 00:56:22,546 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-12-23 00:56:22,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:22,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:22,573 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 00:56:22,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:22,613 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 77 [2020-12-23 00:56:22,617 INFO L547 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-12-23 00:56:22,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:22,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:22,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:22,648 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 00:56:22,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:22,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:22,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:22,678 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 91 [2020-12-23 00:56:22,681 INFO L547 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-12-23 00:56:23,373 WARN L197 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 69 [2020-12-23 00:56:23,374 INFO L625 ElimStorePlain]: treesize reduction 255, result has 66.8 percent of original size [2020-12-23 00:56:23,379 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 5 xjuncts. [2020-12-23 00:56:23,379 INFO L244 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:539, output treesize:514 [2020-12-23 00:56:23,724 WARN L197 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-12-23 00:56:23,743 INFO L639 QuantifierPusher]: Distributing 5 conjuncts over 2 disjuncts [2020-12-23 00:56:23,745 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-23 00:56:23,748 INFO L639 QuantifierPusher]: Distributing 5 conjuncts over 3 disjuncts [2020-12-23 00:56:23,771 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 00:56:23,773 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-23 00:56:23,775 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-23 00:56:23,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:23,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:23,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:23,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:23,833 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 00:56:23,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:23,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:23,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:23,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:23,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:23,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,017 INFO L244 Elim1Store]: Index analysis took 203 ms [2020-12-23 00:56:24,077 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 135 [2020-12-23 00:56:24,081 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:56:24,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,150 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 00:56:24,227 INFO L244 Elim1Store]: Index analysis took 127 ms [2020-12-23 00:56:24,256 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 121 [2020-12-23 00:56:24,260 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 00:56:24,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,404 INFO L244 Elim1Store]: Index analysis took 128 ms [2020-12-23 00:56:24,426 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 132 [2020-12-23 00:56:24,432 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-12-23 00:56:24,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,557 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 146 [2020-12-23 00:56:24,561 INFO L547 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-12-23 00:56:24,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,747 INFO L244 Elim1Store]: Index analysis took 174 ms [2020-12-23 00:56:24,958 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-12-23 00:56:24,959 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:56:24,959 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 123 treesize of output 446 [2020-12-23 00:56:24,974 INFO L547 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-12-23 00:56:24,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:24,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:25,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:25,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:56:25,017 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 118 [2020-12-23 00:56:25,021 INFO L547 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2020-12-23 00:56:26,065 WARN L197 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 161 DAG size of output: 123 [2020-12-23 00:56:26,066 INFO L625 ElimStorePlain]: treesize reduction 345, result has 70.2 percent of original size [2020-12-23 00:56:26,073 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 00:56:26,076 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 6 xjuncts. [2020-12-23 00:56:26,076 INFO L244 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:845, output treesize:811 [2020-12-23 00:56:26,082 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 00:56:26,502 WARN L197 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-12-23 00:56:26,521 INFO L639 QuantifierPusher]: Distributing 6 conjuncts over 2 disjuncts [2020-12-23 00:56:26,524 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 00:56:26,529 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 00:56:27,043 WARN L197 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-12-23 00:56:27,066 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 2 disjuncts [2020-12-23 00:56:55,295 WARN L197 SmtUtils]: Spent 25.28 s on a formula simplification that was a NOOP. DAG size: 141 [2020-12-23 00:56:55,340 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 2 disjuncts [2020-12-23 00:57:28,259 WARN L197 SmtUtils]: Spent 30.78 s on a formula simplification that was a NOOP. DAG size: 259 [2020-12-23 00:58:11,235 WARN L197 SmtUtils]: Spent 40.53 s on a formula simplification that was a NOOP. DAG size: 261 [2020-12-23 00:58:11,276 INFO L639 QuantifierPusher]: Distributing 7 conjuncts over 2 disjuncts [2020-12-23 00:58:19,555 WARN L197 SmtUtils]: Spent 7.34 s on a formula simplification. DAG size of input: 262 DAG size of output: 65 [2020-12-23 00:58:22,655 WARN L197 SmtUtils]: Spent 605.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-23 00:58:23,199 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-12-23 00:58:23,833 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-12-23 00:58:23,875 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-23 00:58:23,883 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-23 00:58:23,888 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-23 00:58:23,901 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-23 00:58:23,905 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-23 00:58:23,915 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2020-12-23 00:58:24,170 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:58:24,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050922049] [2020-12-23 00:58:24,170 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:58:24,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571860756] [2020-12-23 00:58:24,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:58:24,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-12-23 00:58:24,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208285758] [2020-12-23 00:58:24,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 00:58:24,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:58:24,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 00:58:24,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:58:24,173 INFO L87 Difference]: Start difference. First operand 192 states and 248 transitions. Second operand 22 states. [2020-12-23 00:58:24,535 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2020-12-23 00:58:25,125 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2020-12-23 00:58:25,489 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2020-12-23 00:58:26,040 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-12-23 00:58:27,458 WARN L197 SmtUtils]: Spent 873.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 60 [2020-12-23 00:58:30,098 WARN L197 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 169 DAG size of output: 88 [2020-12-23 00:58:34,576 WARN L197 SmtUtils]: Spent 2.61 s on a formula simplification. DAG size of input: 191 DAG size of output: 92 [2020-12-23 00:58:42,291 WARN L197 SmtUtils]: Spent 6.98 s on a formula simplification. DAG size of input: 142 DAG size of output: 63 [2020-12-23 00:59:13,604 WARN L197 SmtUtils]: Spent 28.94 s on a formula simplification. DAG size of input: 329 DAG size of output: 86 [2020-12-23 00:59:15,329 WARN L197 SmtUtils]: Spent 961.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 67 [2020-12-23 00:59:19,707 WARN L197 SmtUtils]: Spent 740.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 70 [2020-12-23 00:59:28,296 WARN L197 SmtUtils]: Spent 5.24 s on a formula simplification. DAG size of input: 283 DAG size of output: 86 [2020-12-23 00:59:37,034 WARN L197 SmtUtils]: Spent 3.45 s on a formula simplification. DAG size of input: 283 DAG size of output: 81 [2020-12-23 00:59:48,663 WARN L197 SmtUtils]: Spent 8.27 s on a formula simplification. DAG size of input: 149 DAG size of output: 145 [2020-12-23 00:59:54,237 WARN L197 SmtUtils]: Spent 3.92 s on a formula simplification. DAG size of input: 277 DAG size of output: 80