/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-programs/partial_mod_count_limited_4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:31:44,140 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:31:44,143 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:31:44,180 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:31:44,180 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:31:44,182 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:31:44,184 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:31:44,186 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:31:44,190 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:31:44,191 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:31:44,192 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:31:44,194 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:31:44,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:31:44,196 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:31:44,197 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:31:44,199 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:31:44,218 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:31:44,220 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:31:44,222 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:31:44,224 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:31:44,227 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:31:44,228 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:31:44,230 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:31:44,231 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:31:44,234 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:31:44,239 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 10:31:44,240 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 10:31:44,241 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 10:31:44,242 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 10:31:44,243 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 10:31:44,244 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 10:31:44,245 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 10:31:44,245 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 10:31:44,246 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:31:44,247 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:31:44,248 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:31:44,249 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 10:31:44,284 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:31:44,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:31:44,288 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:31:44,290 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:31:44,290 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:31:44,290 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:31:44,291 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:31:44,291 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:31:44,291 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:31:44,291 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:31:44,292 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:31:44,292 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:31:44,292 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:31:44,292 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:31:44,292 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:31:44,293 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:31:44,293 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:31:44,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:31:44,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:31:44,295 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:31:44,295 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:31:44,295 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:31:44,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:31:44,296 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:31:44,296 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:31:44,296 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:31:44,732 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:31:44,765 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:31:44,769 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:31:44,770 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:31:44,771 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:31:44,772 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_limited_4.c [2021-01-06 10:31:44,861 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3bfb0c0e6/98fc7291656847dfa3072fa0fac4cea0/FLAGd1f15b52c [2021-01-06 10:31:45,409 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:31:45,410 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_limited_4.c [2021-01-06 10:31:45,417 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3bfb0c0e6/98fc7291656847dfa3072fa0fac4cea0/FLAGd1f15b52c [2021-01-06 10:31:45,771 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3bfb0c0e6/98fc7291656847dfa3072fa0fac4cea0 [2021-01-06 10:31:45,774 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:31:45,777 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:31:45,778 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:31:45,779 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:31:45,783 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:31:45,784 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:31:45" (1/1) ... [2021-01-06 10:31:45,785 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13a98d74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:31:45, skipping insertion in model container [2021-01-06 10:31:45,786 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:31:45" (1/1) ... [2021-01-06 10:31:45,794 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:31:45,810 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:31:45,965 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-programs/partial_mod_count_limited_4.c[331,344] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:31:45,992 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:31:46,002 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:31:46,014 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-programs/partial_mod_count_limited_4.c[331,344] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:31:46,026 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:31:46,041 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:31:46,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:31:46 WrapperNode [2021-01-06 10:31:46,042 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:31:46,043 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:31:46,043 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:31:46,043 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:31:46,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:31:46" (1/1) ... [2021-01-06 10:31:46,060 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:31:46" (1/1) ... [2021-01-06 10:31:46,086 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:31:46,087 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:31:46,087 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:31:46,087 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:31:46,097 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:31:46" (1/1) ... [2021-01-06 10:31:46,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:31:46" (1/1) ... [2021-01-06 10:31:46,100 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:31:46" (1/1) ... [2021-01-06 10:31:46,101 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:31:46" (1/1) ... [2021-01-06 10:31:46,107 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:31:46" (1/1) ... [2021-01-06 10:31:46,112 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:31:46" (1/1) ... [2021-01-06 10:31:46,114 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:31:46" (1/1) ... [2021-01-06 10:31:46,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:31:46,117 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:31:46,118 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:31:46,118 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:31:46,121 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:31:46" (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 [2021-01-06 10:31:46,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:31:46,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:31:46,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:31:46,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:31:46,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:31:46,262 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:31:46,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:31:46,620 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:31:46,623 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-01-06 10:31:46,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:31:46 BoogieIcfgContainer [2021-01-06 10:31:46,626 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:31:46,628 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:31:46,628 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:31:46,633 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:31:46,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:31:45" (1/3) ... [2021-01-06 10:31:46,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4934805e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:31:46, skipping insertion in model container [2021-01-06 10:31:46,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:31:46" (2/3) ... [2021-01-06 10:31:46,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4934805e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:31:46, skipping insertion in model container [2021-01-06 10:31:46,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:31:46" (3/3) ... [2021-01-06 10:31:46,638 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_4.c [2021-01-06 10:31:46,646 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:31:46,651 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:31:46,680 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:31:46,716 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:31:46,716 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:31:46,717 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:31:46,717 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:31:46,717 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:31:46,717 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:31:46,718 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:31:46,718 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:31:46,736 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2021-01-06 10:31:46,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 10:31:46,743 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:46,744 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:46,744 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:46,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:46,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1939796378, now seen corresponding path program 1 times [2021-01-06 10:31:46,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:46,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207930564] [2021-01-06 10:31:46,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:46,957 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:46,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [227233307] [2021-01-06 10:31:46,959 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 [2021-01-06 10:31:47,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:31:47,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 1 conjunts are in the unsatisfiable core [2021-01-06 10:31:47,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:47,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:31:47,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207930564] [2021-01-06 10:31:47,121 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:47,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227233307] [2021-01-06 10:31:47,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:31:47,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:31:47,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37354869] [2021-01-06 10:31:47,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:31:47,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:47,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:31:47,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:31:47,150 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2021-01-06 10:31:47,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:47,170 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2021-01-06 10:31:47,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:31:47,172 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2021-01-06 10:31:47,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:47,191 INFO L225 Difference]: With dead ends: 39 [2021-01-06 10:31:47,192 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 10:31:47,194 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 [2021-01-06 10:31:47,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 10:31:47,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-01-06 10:31:47,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 10:31:47,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-01-06 10:31:47,246 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2021-01-06 10:31:47,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:47,247 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-01-06 10:31:47,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:31:47,248 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-01-06 10:31:47,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 10:31:47,249 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:47,250 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:47,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-01-06 10:31:47,465 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:47,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:47,467 INFO L82 PathProgramCache]: Analyzing trace with hash -54935082, now seen corresponding path program 1 times [2021-01-06 10:31:47,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:47,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193787939] [2021-01-06 10:31:47,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:47,482 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:47,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1524784349] [2021-01-06 10:31:47,483 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 [2021-01-06 10:31:47,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:31:47,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:31:47,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:47,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:31:47,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193787939] [2021-01-06 10:31:47,626 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:47,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524784349] [2021-01-06 10:31:47,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:31:47,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:31:47,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692491182] [2021-01-06 10:31:47,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:31:47,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:47,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:31:47,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:31:47,631 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 4 states. [2021-01-06 10:31:47,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:47,693 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2021-01-06 10:31:47,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:31:47,694 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2021-01-06 10:31:47,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:47,695 INFO L225 Difference]: With dead ends: 42 [2021-01-06 10:31:47,695 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 10:31:47,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:31:47,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 10:31:47,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2021-01-06 10:31:47,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 10:31:47,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-01-06 10:31:47,703 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2021-01-06 10:31:47,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:47,703 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-01-06 10:31:47,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:31:47,703 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-01-06 10:31:47,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 10:31:47,704 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:47,704 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:47,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:47,918 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:47,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:47,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1485448361, now seen corresponding path program 1 times [2021-01-06 10:31:47,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:47,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317311939] [2021-01-06 10:31:47,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:47,936 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:47,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [319354678] [2021-01-06 10:31:47,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-06 10:31:47,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:31:47,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:31:47,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:48,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:31:48,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317311939] [2021-01-06 10:31:48,057 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:48,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319354678] [2021-01-06 10:31:48,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:48,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-01-06 10:31:48,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267936248] [2021-01-06 10:31:48,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:31:48,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:48,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:31:48,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:31:48,060 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 5 states. [2021-01-06 10:31:48,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:48,141 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2021-01-06 10:31:48,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:31:48,142 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2021-01-06 10:31:48,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:48,143 INFO L225 Difference]: With dead ends: 54 [2021-01-06 10:31:48,143 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 10:31:48,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:31:48,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 10:31:48,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2021-01-06 10:31:48,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 10:31:48,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-01-06 10:31:48,151 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2021-01-06 10:31:48,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:48,152 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-01-06 10:31:48,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:31:48,152 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-01-06 10:31:48,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 10:31:48,153 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:48,153 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:48,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:48,367 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:48,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:48,369 INFO L82 PathProgramCache]: Analyzing trace with hash -2118808138, now seen corresponding path program 2 times [2021-01-06 10:31:48,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:48,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892603779] [2021-01-06 10:31:48,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:48,385 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:48,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [873862022] [2021-01-06 10:31:48,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:48,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-01-06 10:31:48,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:48,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 10:31:48,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:48,618 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 10:31:48,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892603779] [2021-01-06 10:31:48,619 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:48,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873862022] [2021-01-06 10:31:48,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:31:48,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 10:31:48,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696435091] [2021-01-06 10:31:48,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:31:48,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:48,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:31:48,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:31:48,649 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 6 states. [2021-01-06 10:31:48,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:48,749 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-01-06 10:31:48,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:31:48,750 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2021-01-06 10:31:48,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:48,751 INFO L225 Difference]: With dead ends: 35 [2021-01-06 10:31:48,751 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 10:31:48,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:31:48,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 10:31:48,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2021-01-06 10:31:48,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 10:31:48,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-01-06 10:31:48,758 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 21 [2021-01-06 10:31:48,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:48,758 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-01-06 10:31:48,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:31:48,758 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-01-06 10:31:48,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 10:31:48,759 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:48,759 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:48,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:48,973 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:48,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:48,975 INFO L82 PathProgramCache]: Analyzing trace with hash -2118867720, now seen corresponding path program 1 times [2021-01-06 10:31:48,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:48,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753866392] [2021-01-06 10:31:48,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:48,988 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:48,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [949775638] [2021-01-06 10:31:48,989 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 [2021-01-06 10:31:49,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:31:49,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:31:49,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:49,145 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:31:49,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753866392] [2021-01-06 10:31:49,146 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:49,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949775638] [2021-01-06 10:31:49,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:49,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 10:31:49,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674799097] [2021-01-06 10:31:49,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:31:49,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:49,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:31:49,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:31:49,148 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 6 states. [2021-01-06 10:31:49,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:49,236 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2021-01-06 10:31:49,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:31:49,237 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2021-01-06 10:31:49,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:49,238 INFO L225 Difference]: With dead ends: 89 [2021-01-06 10:31:49,238 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 10:31:49,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:31:49,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 10:31:49,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 34. [2021-01-06 10:31:49,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 10:31:49,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-01-06 10:31:49,252 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 21 [2021-01-06 10:31:49,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:49,252 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-01-06 10:31:49,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:31:49,252 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-01-06 10:31:49,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 10:31:49,253 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:49,253 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:49,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:49,468 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:49,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:49,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1636705269, now seen corresponding path program 2 times [2021-01-06 10:31:49,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:49,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271410502] [2021-01-06 10:31:49,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:49,480 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:49,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1944889154] [2021-01-06 10:31:49,481 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 [2021-01-06 10:31:49,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-01-06 10:31:49,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:49,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:31:49,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:49,672 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-01-06 10:31:49,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271410502] [2021-01-06 10:31:49,672 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:49,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944889154] [2021-01-06 10:31:49,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:31:49,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 10:31:49,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222458739] [2021-01-06 10:31:49,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:31:49,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:49,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:31:49,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:31:49,675 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 6 states. [2021-01-06 10:31:49,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:49,835 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-01-06 10:31:49,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:31:49,836 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2021-01-06 10:31:49,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:49,837 INFO L225 Difference]: With dead ends: 46 [2021-01-06 10:31:49,837 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 10:31:49,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:31:49,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 10:31:49,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2021-01-06 10:31:49,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 10:31:49,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-01-06 10:31:49,845 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 26 [2021-01-06 10:31:49,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:49,845 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-01-06 10:31:49,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:31:49,845 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-01-06 10:31:49,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 10:31:49,846 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:49,846 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:50,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:50,060 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:50,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:50,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1380764901, now seen corresponding path program 1 times [2021-01-06 10:31:50,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:50,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241736483] [2021-01-06 10:31:50,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:50,072 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:50,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [858722516] [2021-01-06 10:31:50,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:50,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:31:50,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:31:50,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:50,269 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:31:50,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241736483] [2021-01-06 10:31:50,270 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:50,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858722516] [2021-01-06 10:31:50,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:50,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:31:50,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080647632] [2021-01-06 10:31:50,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:31:50,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:50,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:31:50,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:31:50,273 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 7 states. [2021-01-06 10:31:50,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:50,394 INFO L93 Difference]: Finished difference Result 127 states and 154 transitions. [2021-01-06 10:31:50,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:31:50,395 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2021-01-06 10:31:50,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:50,397 INFO L225 Difference]: With dead ends: 127 [2021-01-06 10:31:50,397 INFO L226 Difference]: Without dead ends: 104 [2021-01-06 10:31:50,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:31:50,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-01-06 10:31:50,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 44. [2021-01-06 10:31:50,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 10:31:50,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2021-01-06 10:31:50,406 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 31 [2021-01-06 10:31:50,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:50,407 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2021-01-06 10:31:50,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:31:50,407 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2021-01-06 10:31:50,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 10:31:50,408 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:50,408 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:50,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:50,623 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:50,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:50,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1775597512, now seen corresponding path program 2 times [2021-01-06 10:31:50,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:50,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640063015] [2021-01-06 10:31:50,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:50,635 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:50,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [695162936] [2021-01-06 10:31:50,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:50,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:31:50,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:50,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:31:50,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:50,921 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:31:50,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640063015] [2021-01-06 10:31:50,922 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:50,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695162936] [2021-01-06 10:31:50,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:50,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:31:50,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005869502] [2021-01-06 10:31:50,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:31:50,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:50,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:31:50,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:31:50,925 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 8 states. [2021-01-06 10:31:51,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:51,050 INFO L93 Difference]: Finished difference Result 149 states and 180 transitions. [2021-01-06 10:31:51,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:31:51,050 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2021-01-06 10:31:51,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:51,052 INFO L225 Difference]: With dead ends: 149 [2021-01-06 10:31:51,052 INFO L226 Difference]: Without dead ends: 126 [2021-01-06 10:31:51,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:31:51,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-01-06 10:31:51,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 49. [2021-01-06 10:31:51,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-01-06 10:31:51,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2021-01-06 10:31:51,061 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 36 [2021-01-06 10:31:51,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:51,061 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2021-01-06 10:31:51,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:31:51,061 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2021-01-06 10:31:51,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 10:31:51,063 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:51,063 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:51,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-01-06 10:31:51,278 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:51,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:51,280 INFO L82 PathProgramCache]: Analyzing trace with hash -599004987, now seen corresponding path program 3 times [2021-01-06 10:31:51,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:51,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138043732] [2021-01-06 10:31:51,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:51,289 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:51,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1816873762] [2021-01-06 10:31:51,290 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 [2021-01-06 10:31:51,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:31:51,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:51,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 10:31:51,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:51,563 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-01-06 10:31:51,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138043732] [2021-01-06 10:31:51,564 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:51,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816873762] [2021-01-06 10:31:51,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:51,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:31:51,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579655853] [2021-01-06 10:31:51,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:31:51,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:51,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:31:51,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:31:51,566 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand 7 states. [2021-01-06 10:31:51,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:51,758 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2021-01-06 10:31:51,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:31:51,758 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2021-01-06 10:31:51,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:51,759 INFO L225 Difference]: With dead ends: 61 [2021-01-06 10:31:51,759 INFO L226 Difference]: Without dead ends: 59 [2021-01-06 10:31:51,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:31:51,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-01-06 10:31:51,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2021-01-06 10:31:51,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 10:31:51,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2021-01-06 10:31:51,767 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 41 [2021-01-06 10:31:51,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:51,767 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2021-01-06 10:31:51,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:31:51,768 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2021-01-06 10:31:51,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 10:31:51,769 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:51,769 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:51,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:51,976 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:51,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:51,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1681892459, now seen corresponding path program 4 times [2021-01-06 10:31:51,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:51,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591820674] [2021-01-06 10:31:51,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:51,991 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:51,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1674784375] [2021-01-06 10:31:51,992 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 [2021-01-06 10:31:52,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:31:52,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:52,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:31:52,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:52,101 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 [2021-01-06 10:31:52,102 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:31:52,109 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:31:52,110 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:31:52,110 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2021-01-06 10:31:52,140 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-01-06 10:31:52,141 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:31:52,147 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:31:52,148 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:31:52,148 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-01-06 10:31:52,178 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-01-06 10:31:52,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591820674] [2021-01-06 10:31:52,179 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:52,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674784375] [2021-01-06 10:31:52,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:52,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:31:52,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959358005] [2021-01-06 10:31:52,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:31:52,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:52,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:31:52,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:31:52,181 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 6 states. [2021-01-06 10:31:52,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:52,254 INFO L93 Difference]: Finished difference Result 116 states and 139 transitions. [2021-01-06 10:31:52,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:31:52,260 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2021-01-06 10:31:52,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:52,260 INFO L225 Difference]: With dead ends: 116 [2021-01-06 10:31:52,261 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 10:31:52,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:31:52,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 10:31:52,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2021-01-06 10:31:52,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 10:31:52,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-01-06 10:31:52,269 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 46 [2021-01-06 10:31:52,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:52,269 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-01-06 10:31:52,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:31:52,269 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2021-01-06 10:31:52,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 10:31:52,270 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:52,271 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:52,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:52,480 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:52,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:52,481 INFO L82 PathProgramCache]: Analyzing trace with hash -562090839, now seen corresponding path program 1 times [2021-01-06 10:31:52,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:52,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833369024] [2021-01-06 10:31:52,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:52,491 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:52,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [911895560] [2021-01-06 10:31:52,492 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 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 [2021-01-06 10:31:52,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:31:52,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:31:52,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:52,738 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-01-06 10:31:52,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833369024] [2021-01-06 10:31:52,740 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:52,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911895560] [2021-01-06 10:31:52,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:52,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:31:52,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957345052] [2021-01-06 10:31:52,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:31:52,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:52,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:31:52,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:31:52,752 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 9 states. [2021-01-06 10:31:52,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:52,902 INFO L93 Difference]: Finished difference Result 197 states and 236 transitions. [2021-01-06 10:31:52,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:31:52,903 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2021-01-06 10:31:52,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:52,905 INFO L225 Difference]: With dead ends: 197 [2021-01-06 10:31:52,905 INFO L226 Difference]: Without dead ends: 169 [2021-01-06 10:31:52,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:31:52,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-01-06 10:31:52,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 59. [2021-01-06 10:31:52,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 10:31:52,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2021-01-06 10:31:52,914 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 46 [2021-01-06 10:31:52,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:52,914 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2021-01-06 10:31:52,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:31:52,914 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2021-01-06 10:31:52,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 10:31:52,915 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:52,915 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:53,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-01-06 10:31:53,130 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:53,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:53,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1943967942, now seen corresponding path program 2 times [2021-01-06 10:31:53,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:53,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468779481] [2021-01-06 10:31:53,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:53,142 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:53,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [650817738] [2021-01-06 10:31:53,143 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 [2021-01-06 10:31:53,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:31:53,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:53,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:31:53,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:53,432 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-01-06 10:31:53,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468779481] [2021-01-06 10:31:53,433 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:53,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650817738] [2021-01-06 10:31:53,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:53,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 10:31:53,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563570862] [2021-01-06 10:31:53,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:31:53,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:53,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:31:53,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:31:53,435 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 10 states. [2021-01-06 10:31:53,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:53,616 INFO L93 Difference]: Finished difference Result 224 states and 268 transitions. [2021-01-06 10:31:53,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:31:53,617 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2021-01-06 10:31:53,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:53,618 INFO L225 Difference]: With dead ends: 224 [2021-01-06 10:31:53,619 INFO L226 Difference]: Without dead ends: 196 [2021-01-06 10:31:53,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:31:53,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-01-06 10:31:53,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 64. [2021-01-06 10:31:53,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 10:31:53,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2021-01-06 10:31:53,628 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 51 [2021-01-06 10:31:53,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:53,628 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2021-01-06 10:31:53,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:31:53,628 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2021-01-06 10:31:53,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 10:31:53,629 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:53,629 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:53,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:53,844 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:53,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:53,845 INFO L82 PathProgramCache]: Analyzing trace with hash 71442249, now seen corresponding path program 3 times [2021-01-06 10:31:53,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:53,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478607354] [2021-01-06 10:31:53,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:53,854 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:53,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1630580226] [2021-01-06 10:31:53,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:53,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 10:31:53,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:53,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:31:53,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:54,014 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 [2021-01-06 10:31:54,015 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:31:54,019 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:31:54,021 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:31:54,021 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2021-01-06 10:31:54,041 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-01-06 10:31:54,042 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:31:54,047 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:31:54,048 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:31:54,048 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:9 [2021-01-06 10:31:54,102 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-01-06 10:31:54,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478607354] [2021-01-06 10:31:54,103 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:54,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630580226] [2021-01-06 10:31:54,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:31:54,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 10:31:54,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51037576] [2021-01-06 10:31:54,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:31:54,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:54,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:31:54,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:31:54,105 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand 7 states. [2021-01-06 10:31:54,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:54,245 INFO L93 Difference]: Finished difference Result 136 states and 163 transitions. [2021-01-06 10:31:54,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:31:54,246 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2021-01-06 10:31:54,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:54,247 INFO L225 Difference]: With dead ends: 136 [2021-01-06 10:31:54,247 INFO L226 Difference]: Without dead ends: 108 [2021-01-06 10:31:54,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:31:54,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-01-06 10:31:54,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 66. [2021-01-06 10:31:54,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 10:31:54,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2021-01-06 10:31:54,256 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 56 [2021-01-06 10:31:54,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:54,256 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2021-01-06 10:31:54,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:31:54,256 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2021-01-06 10:31:54,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 10:31:54,257 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:54,257 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:54,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:31:54,471 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:54,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:54,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1617501493, now seen corresponding path program 4 times [2021-01-06 10:31:54,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:54,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836682898] [2021-01-06 10:31:54,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:54,480 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:54,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1959260246] [2021-01-06 10:31:54,480 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 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 [2021-01-06 10:31:54,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:31:54,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:54,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:31:54,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:54,554 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 [2021-01-06 10:31:54,555 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:31:54,560 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:31:54,561 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:31:54,561 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2021-01-06 10:31:54,580 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-01-06 10:31:54,582 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:31:54,584 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:31:54,584 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:31:54,584 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2021-01-06 10:31:54,632 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:31:54,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836682898] [2021-01-06 10:31:54,633 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:54,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959260246] [2021-01-06 10:31:54,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:31:54,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 10:31:54,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133447272] [2021-01-06 10:31:54,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:31:54,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:54,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:31:54,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:31:54,635 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand 5 states. [2021-01-06 10:31:54,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:54,683 INFO L93 Difference]: Finished difference Result 132 states and 158 transitions. [2021-01-06 10:31:54,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:31:54,684 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 56 [2021-01-06 10:31:54,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:54,684 INFO L225 Difference]: With dead ends: 132 [2021-01-06 10:31:54,684 INFO L226 Difference]: Without dead ends: 74 [2021-01-06 10:31:54,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:31:54,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-01-06 10:31:54,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2021-01-06 10:31:54,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 10:31:54,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2021-01-06 10:31:54,691 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 56 [2021-01-06 10:31:54,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:54,691 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2021-01-06 10:31:54,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:31:54,692 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2021-01-06 10:31:54,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 10:31:54,693 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:54,693 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:54,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:54,908 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:54,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:54,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1633020211, now seen corresponding path program 5 times [2021-01-06 10:31:54,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:54,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025003887] [2021-01-06 10:31:54,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:54,918 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:54,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [177087548] [2021-01-06 10:31:54,918 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 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 [2021-01-06 10:31:54,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 10:31:54,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:54,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:31:54,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:54,977 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 [2021-01-06 10:31:54,978 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:31:54,980 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:31:54,981 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:31:54,981 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2021-01-06 10:31:55,078 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:31:55,079 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 42 treesize of output 71 [2021-01-06 10:31:55,082 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:31:55,111 INFO L625 ElimStorePlain]: treesize reduction 30, result has 55.2 percent of original size [2021-01-06 10:31:55,113 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. [2021-01-06 10:31:55,113 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:37 [2021-01-06 10:31:55,174 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:31:55,174 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 30 [2021-01-06 10:31:55,178 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:31:55,196 INFO L625 ElimStorePlain]: treesize reduction 12, result has 57.1 percent of original size [2021-01-06 10:31:55,201 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:31:55,202 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:48, output treesize:3 [2021-01-06 10:31:55,237 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 83 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-01-06 10:31:55,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025003887] [2021-01-06 10:31:55,238 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:55,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177087548] [2021-01-06 10:31:55,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:55,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:31:55,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853242959] [2021-01-06 10:31:55,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:31:55,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:55,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:31:55,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:31:55,240 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand 8 states. [2021-01-06 10:31:55,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:55,394 INFO L93 Difference]: Finished difference Result 140 states and 169 transitions. [2021-01-06 10:31:55,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:31:55,395 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2021-01-06 10:31:55,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:55,396 INFO L225 Difference]: With dead ends: 140 [2021-01-06 10:31:55,396 INFO L226 Difference]: Without dead ends: 97 [2021-01-06 10:31:55,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:31:55,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-01-06 10:31:55,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2021-01-06 10:31:55,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-01-06 10:31:55,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2021-01-06 10:31:55,405 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 56 [2021-01-06 10:31:55,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:55,405 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2021-01-06 10:31:55,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:31:55,405 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2021-01-06 10:31:55,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 10:31:55,409 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:55,409 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:55,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 10:31:55,624 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:55,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:55,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1670153675, now seen corresponding path program 6 times [2021-01-06 10:31:55,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:55,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138652580] [2021-01-06 10:31:55,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:55,634 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:55,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1498029268] [2021-01-06 10:31:55,639 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 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 [2021-01-06 10:31:55,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 10:31:55,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:55,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 10:31:55,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:56,024 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-01-06 10:31:56,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138652580] [2021-01-06 10:31:56,025 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:56,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498029268] [2021-01-06 10:31:56,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:56,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 10:31:56,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152361092] [2021-01-06 10:31:56,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:31:56,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:56,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:31:56,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:31:56,028 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand 10 states. [2021-01-06 10:31:56,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:56,261 INFO L93 Difference]: Finished difference Result 103 states and 120 transitions. [2021-01-06 10:31:56,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:31:56,262 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2021-01-06 10:31:56,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:56,264 INFO L225 Difference]: With dead ends: 103 [2021-01-06 10:31:56,265 INFO L226 Difference]: Without dead ends: 101 [2021-01-06 10:31:56,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:31:56,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-01-06 10:31:56,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 96. [2021-01-06 10:31:56,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2021-01-06 10:31:56,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 112 transitions. [2021-01-06 10:31:56,277 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 112 transitions. Word has length 56 [2021-01-06 10:31:56,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:56,278 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 112 transitions. [2021-01-06 10:31:56,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:31:56,278 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 112 transitions. [2021-01-06 10:31:56,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 10:31:56,279 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:56,279 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:56,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 10:31:56,495 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:56,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:56,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1477851941, now seen corresponding path program 7 times [2021-01-06 10:31:56,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:56,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204088597] [2021-01-06 10:31:56,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:56,503 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:56,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [486953724] [2021-01-06 10:31:56,504 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:56,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:31:56,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:31:56,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:56,740 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-01-06 10:31:56,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204088597] [2021-01-06 10:31:56,741 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:56,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486953724] [2021-01-06 10:31:56,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:56,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 10:31:56,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078338703] [2021-01-06 10:31:56,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:31:56,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:56,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:31:56,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:31:56,743 INFO L87 Difference]: Start difference. First operand 96 states and 112 transitions. Second operand 11 states. [2021-01-06 10:31:56,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:56,950 INFO L93 Difference]: Finished difference Result 336 states and 400 transitions. [2021-01-06 10:31:56,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:31:56,951 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2021-01-06 10:31:56,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:56,953 INFO L225 Difference]: With dead ends: 336 [2021-01-06 10:31:56,953 INFO L226 Difference]: Without dead ends: 291 [2021-01-06 10:31:56,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:31:56,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-01-06 10:31:56,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 106. [2021-01-06 10:31:56,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2021-01-06 10:31:56,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 123 transitions. [2021-01-06 10:31:56,964 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 123 transitions. Word has length 61 [2021-01-06 10:31:56,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:56,965 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 123 transitions. [2021-01-06 10:31:56,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:31:56,965 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 123 transitions. [2021-01-06 10:31:56,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 10:31:56,965 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:56,966 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:57,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 10:31:57,179 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:57,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:57,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1255875722, now seen corresponding path program 8 times [2021-01-06 10:31:57,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:57,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204984320] [2021-01-06 10:31:57,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:57,188 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:57,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [401832459] [2021-01-06 10:31:57,188 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:57,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:31:57,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:57,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:31:57,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:57,569 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-01-06 10:31:57,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204984320] [2021-01-06 10:31:57,569 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:57,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401832459] [2021-01-06 10:31:57,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:57,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 10:31:57,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985522545] [2021-01-06 10:31:57,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 10:31:57,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:57,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 10:31:57,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:31:57,572 INFO L87 Difference]: Start difference. First operand 106 states and 123 transitions. Second operand 12 states. [2021-01-06 10:31:57,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:57,776 INFO L93 Difference]: Finished difference Result 373 states and 443 transitions. [2021-01-06 10:31:57,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:31:57,776 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2021-01-06 10:31:57,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:57,778 INFO L225 Difference]: With dead ends: 373 [2021-01-06 10:31:57,778 INFO L226 Difference]: Without dead ends: 328 [2021-01-06 10:31:57,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:31:57,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-01-06 10:31:57,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 116. [2021-01-06 10:31:57,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2021-01-06 10:31:57,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 134 transitions. [2021-01-06 10:31:57,790 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 134 transitions. Word has length 66 [2021-01-06 10:31:57,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:57,790 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 134 transitions. [2021-01-06 10:31:57,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 10:31:57,791 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 134 transitions. [2021-01-06 10:31:57,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 10:31:57,791 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:57,792 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:58,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 10:31:58,007 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:58,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:58,008 INFO L82 PathProgramCache]: Analyzing trace with hash -495794747, now seen corresponding path program 9 times [2021-01-06 10:31:58,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:58,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431843518] [2021-01-06 10:31:58,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:58,017 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:58,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1680785747] [2021-01-06 10:31:58,017 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:58,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:31:58,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:58,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 10:31:58,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:58,466 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-01-06 10:31:58,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431843518] [2021-01-06 10:31:58,466 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:58,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680785747] [2021-01-06 10:31:58,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:58,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 10:31:58,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942774992] [2021-01-06 10:31:58,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:31:58,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:58,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:31:58,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:31:58,470 INFO L87 Difference]: Start difference. First operand 116 states and 134 transitions. Second operand 11 states. [2021-01-06 10:31:58,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:58,729 INFO L93 Difference]: Finished difference Result 128 states and 148 transitions. [2021-01-06 10:31:58,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:31:58,729 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2021-01-06 10:31:58,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:58,731 INFO L225 Difference]: With dead ends: 128 [2021-01-06 10:31:58,731 INFO L226 Difference]: Without dead ends: 126 [2021-01-06 10:31:58,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:31:58,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-01-06 10:31:58,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 121. [2021-01-06 10:31:58,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2021-01-06 10:31:58,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 140 transitions. [2021-01-06 10:31:58,741 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 140 transitions. Word has length 71 [2021-01-06 10:31:58,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:58,741 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 140 transitions. [2021-01-06 10:31:58,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:31:58,741 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 140 transitions. [2021-01-06 10:31:58,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-06 10:31:58,742 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:58,742 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:58,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:58,958 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:58,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:58,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1692067691, now seen corresponding path program 10 times [2021-01-06 10:31:58,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:58,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868681243] [2021-01-06 10:31:58,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:58,966 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:58,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [557753736] [2021-01-06 10:31:58,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:59,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:31:59,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:31:59,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:31:59,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:59,084 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 [2021-01-06 10:31:59,085 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:31:59,092 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:31:59,093 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:31:59,093 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2021-01-06 10:31:59,118 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-01-06 10:31:59,121 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:31:59,125 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:31:59,127 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:31:59,127 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:28, output treesize:3 [2021-01-06 10:31:59,174 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 100 proven. 2 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:31:59,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868681243] [2021-01-06 10:31:59,174 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:59,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557753736] [2021-01-06 10:31:59,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:59,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:31:59,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314759982] [2021-01-06 10:31:59,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:31:59,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:59,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:31:59,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:31:59,176 INFO L87 Difference]: Start difference. First operand 121 states and 140 transitions. Second operand 7 states. [2021-01-06 10:31:59,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:31:59,267 INFO L93 Difference]: Finished difference Result 176 states and 204 transitions. [2021-01-06 10:31:59,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:31:59,267 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 76 [2021-01-06 10:31:59,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:31:59,268 INFO L225 Difference]: With dead ends: 176 [2021-01-06 10:31:59,268 INFO L226 Difference]: Without dead ends: 108 [2021-01-06 10:31:59,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:31:59,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-01-06 10:31:59,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 86. [2021-01-06 10:31:59,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-01-06 10:31:59,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2021-01-06 10:31:59,275 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 76 [2021-01-06 10:31:59,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:31:59,275 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2021-01-06 10:31:59,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:31:59,275 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2021-01-06 10:31:59,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-06 10:31:59,276 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:31:59,276 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:31:59,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:59,479 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:31:59,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:31:59,480 INFO L82 PathProgramCache]: Analyzing trace with hash -2042199827, now seen corresponding path program 1 times [2021-01-06 10:31:59,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:31:59,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089040778] [2021-01-06 10:31:59,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:31:59,486 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:31:59,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [674543209] [2021-01-06 10:31:59,487 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:31:59,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:31:59,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:31:59,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:31:59,794 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:31:59,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089040778] [2021-01-06 10:31:59,795 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:31:59,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674543209] [2021-01-06 10:31:59,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:31:59,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 10:31:59,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514491005] [2021-01-06 10:31:59,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:31:59,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:31:59,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:31:59,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:31:59,797 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand 13 states. [2021-01-06 10:32:00,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:32:00,045 INFO L93 Difference]: Finished difference Result 386 states and 451 transitions. [2021-01-06 10:32:00,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:32:00,046 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2021-01-06 10:32:00,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:32:00,048 INFO L225 Difference]: With dead ends: 386 [2021-01-06 10:32:00,049 INFO L226 Difference]: Without dead ends: 346 [2021-01-06 10:32:00,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:32:00,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-01-06 10:32:00,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 91. [2021-01-06 10:32:00,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-01-06 10:32:00,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2021-01-06 10:32:00,060 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 76 [2021-01-06 10:32:00,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:32:00,060 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2021-01-06 10:32:00,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:32:00,060 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2021-01-06 10:32:00,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-06 10:32:00,061 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:00,062 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:00,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 10:32:00,263 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:00,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:00,264 INFO L82 PathProgramCache]: Analyzing trace with hash 279020216, now seen corresponding path program 2 times [2021-01-06 10:32:00,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:00,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81733148] [2021-01-06 10:32:00,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:00,306 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:32:00,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1320989256] [2021-01-06 10:32:00,306 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:00,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:32:00,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:32:00,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:32:00,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:32:00,741 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:32:00,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81733148] [2021-01-06 10:32:00,742 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:32:00,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320989256] [2021-01-06 10:32:00,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:32:00,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-01-06 10:32:00,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678218421] [2021-01-06 10:32:00,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 10:32:00,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:32:00,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 10:32:00,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:32:00,744 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand 14 states. [2021-01-06 10:32:01,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:32:01,020 INFO L93 Difference]: Finished difference Result 423 states and 494 transitions. [2021-01-06 10:32:01,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 10:32:01,021 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2021-01-06 10:32:01,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:32:01,023 INFO L225 Difference]: With dead ends: 423 [2021-01-06 10:32:01,023 INFO L226 Difference]: Without dead ends: 383 [2021-01-06 10:32:01,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:32:01,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-01-06 10:32:01,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 96. [2021-01-06 10:32:01,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2021-01-06 10:32:01,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2021-01-06 10:32:01,033 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 81 [2021-01-06 10:32:01,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:32:01,033 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2021-01-06 10:32:01,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 10:32:01,033 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2021-01-06 10:32:01,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-06 10:32:01,034 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:01,034 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:01,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:01,249 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:01,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:01,249 INFO L82 PathProgramCache]: Analyzing trace with hash -697899059, now seen corresponding path program 3 times [2021-01-06 10:32:01,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:01,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462460480] [2021-01-06 10:32:01,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:01,257 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:32:01,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [820648794] [2021-01-06 10:32:01,258 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:01,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:32:01,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:32:01,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:32:01,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:32:15,613 WARN L197 SmtUtils]: Spent 14.23 s on a formula simplification that was a NOOP. DAG size: 32 [2021-01-06 10:32:15,987 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:32:15,992 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:32:15,997 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:32:16,000 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:32:18,069 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 17 [2021-01-06 10:32:22,153 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 19 [2021-01-06 10:32:22,263 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2021-01-06 10:32:22,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462460480] [2021-01-06 10:32:22,263 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:32:22,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820648794] [2021-01-06 10:32:22,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:32:22,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:32:22,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954234921] [2021-01-06 10:32:22,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:32:22,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:32:22,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:32:22,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=25, Unknown=1, NotChecked=0, Total=42 [2021-01-06 10:32:22,265 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand 7 states. [2021-01-06 10:32:30,718 WARN L197 SmtUtils]: Spent 6.36 s on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-01-06 10:32:39,842 WARN L197 SmtUtils]: Spent 9.09 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-01-06 10:32:48,953 WARN L197 SmtUtils]: Spent 9.03 s on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-01-06 10:32:53,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:32:53,383 INFO L93 Difference]: Finished difference Result 197 states and 227 transitions. [2021-01-06 10:32:53,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:32:53,385 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 86 [2021-01-06 10:32:53,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:32:53,389 INFO L225 Difference]: With dead ends: 197 [2021-01-06 10:32:53,389 INFO L226 Difference]: Without dead ends: 164 [2021-01-06 10:32:53,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 45.0s TimeCoverageRelationStatistics Valid=37, Invalid=52, Unknown=1, NotChecked=0, Total=90 [2021-01-06 10:32:53,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-01-06 10:32:53,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 105. [2021-01-06 10:32:53,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2021-01-06 10:32:53,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2021-01-06 10:32:53,406 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 86 [2021-01-06 10:32:53,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:32:53,406 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2021-01-06 10:32:53,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:32:53,407 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2021-01-06 10:32:53,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-01-06 10:32:53,407 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:53,408 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:53,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 10:32:53,621 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:53,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:53,622 INFO L82 PathProgramCache]: Analyzing trace with hash -459469228, now seen corresponding path program 1 times [2021-01-06 10:32:53,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:53,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286644802] [2021-01-06 10:32:53,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:53,633 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:32:53,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1608375210] [2021-01-06 10:32:53,633 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:53,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:32:53,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 10:32:53,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:32:54,142 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:32:54,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286644802] [2021-01-06 10:32:54,143 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:32:54,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608375210] [2021-01-06 10:32:54,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:32:54,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-01-06 10:32:54,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988114076] [2021-01-06 10:32:54,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 10:32:54,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:32:54,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 10:32:54,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:32:54,144 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand 16 states. [2021-01-06 10:32:54,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:32:54,609 INFO L93 Difference]: Finished difference Result 515 states and 604 transitions. [2021-01-06 10:32:54,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 10:32:54,610 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 91 [2021-01-06 10:32:54,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:32:54,613 INFO L225 Difference]: With dead ends: 515 [2021-01-06 10:32:54,613 INFO L226 Difference]: Without dead ends: 466 [2021-01-06 10:32:54,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:32:54,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-01-06 10:32:54,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 115. [2021-01-06 10:32:54,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2021-01-06 10:32:54,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 127 transitions. [2021-01-06 10:32:54,627 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 127 transitions. Word has length 91 [2021-01-06 10:32:54,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:32:54,628 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 127 transitions. [2021-01-06 10:32:54,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 10:32:54,628 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 127 transitions. [2021-01-06 10:32:54,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-01-06 10:32:54,629 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:54,629 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:54,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:54,845 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:54,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:54,845 INFO L82 PathProgramCache]: Analyzing trace with hash -830076044, now seen corresponding path program 2 times [2021-01-06 10:32:54,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:54,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193034392] [2021-01-06 10:32:54,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:54,853 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:32:54,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1271198093] [2021-01-06 10:32:54,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:55,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:32:55,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:32:55,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 10:32:55,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:32:55,557 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:32:55,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193034392] [2021-01-06 10:32:55,557 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:32:55,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271198093] [2021-01-06 10:32:55,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:32:55,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-01-06 10:32:55,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945698673] [2021-01-06 10:32:55,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 10:32:55,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:32:55,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 10:32:55,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:32:55,559 INFO L87 Difference]: Start difference. First operand 115 states and 127 transitions. Second operand 18 states. [2021-01-06 10:32:56,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:32:56,074 INFO L93 Difference]: Finished difference Result 589 states and 690 transitions. [2021-01-06 10:32:56,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 10:32:56,075 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 101 [2021-01-06 10:32:56,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:32:56,079 INFO L225 Difference]: With dead ends: 589 [2021-01-06 10:32:56,079 INFO L226 Difference]: Without dead ends: 540 [2021-01-06 10:32:56,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:32:56,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-01-06 10:32:56,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 125. [2021-01-06 10:32:56,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2021-01-06 10:32:56,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 137 transitions. [2021-01-06 10:32:56,095 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 137 transitions. Word has length 101 [2021-01-06 10:32:56,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:32:56,095 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 137 transitions. [2021-01-06 10:32:56,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 10:32:56,096 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 137 transitions. [2021-01-06 10:32:56,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-01-06 10:32:56,097 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:56,097 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:56,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 10:32:56,301 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:56,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:56,302 INFO L82 PathProgramCache]: Analyzing trace with hash 397222036, now seen corresponding path program 3 times [2021-01-06 10:32:56,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:56,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101513873] [2021-01-06 10:32:56,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:56,310 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:32:56,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [889733806] [2021-01-06 10:32:56,310 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:56,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 10:32:56,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:32:56,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:32:56,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:32:56,650 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 [2021-01-06 10:32:56,651 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:32:56,664 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:32:56,665 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:32:56,665 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2021-01-06 10:32:56,699 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-01-06 10:32:56,700 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:32:56,713 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:32:56,714 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:32:56,714 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:31, output treesize:12 [2021-01-06 10:32:56,854 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 15 proven. 61 refuted. 0 times theorem prover too weak. 586 trivial. 0 not checked. [2021-01-06 10:32:56,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101513873] [2021-01-06 10:32:56,854 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:32:56,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889733806] [2021-01-06 10:32:56,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:32:56,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:32:56,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512895399] [2021-01-06 10:32:56,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:32:56,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:32:56,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:32:56,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:32:56,856 INFO L87 Difference]: Start difference. First operand 125 states and 137 transitions. Second operand 9 states. [2021-01-06 10:32:57,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:32:57,398 INFO L93 Difference]: Finished difference Result 193 states and 218 transitions. [2021-01-06 10:32:57,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:32:57,399 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 111 [2021-01-06 10:32:57,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:32:57,400 INFO L225 Difference]: With dead ends: 193 [2021-01-06 10:32:57,400 INFO L226 Difference]: Without dead ends: 160 [2021-01-06 10:32:57,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:32:57,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-01-06 10:32:57,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 134. [2021-01-06 10:32:57,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2021-01-06 10:32:57,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 148 transitions. [2021-01-06 10:32:57,412 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 148 transitions. Word has length 111 [2021-01-06 10:32:57,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:32:57,413 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 148 transitions. [2021-01-06 10:32:57,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:32:57,413 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 148 transitions. [2021-01-06 10:32:57,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-01-06 10:32:57,414 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:57,414 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:57,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 10:32:57,617 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:57,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:57,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1783425430, now seen corresponding path program 1 times [2021-01-06 10:32:57,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:57,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598688995] [2021-01-06 10:32:57,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:57,627 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:32:57,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2021800856] [2021-01-06 10:32:57,628 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:57,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:32:57,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 10:32:57,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:32:58,342 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:32:58,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598688995] [2021-01-06 10:32:58,343 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:32:58,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021800856] [2021-01-06 10:32:58,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:32:58,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-01-06 10:32:58,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488609798] [2021-01-06 10:32:58,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 10:32:58,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:32:58,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 10:32:58,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:32:58,345 INFO L87 Difference]: Start difference. First operand 134 states and 148 transitions. Second operand 20 states. [2021-01-06 10:32:58,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:32:58,914 INFO L93 Difference]: Finished difference Result 681 states and 798 transitions. [2021-01-06 10:32:58,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 10:32:58,915 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 111 [2021-01-06 10:32:58,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:32:58,918 INFO L225 Difference]: With dead ends: 681 [2021-01-06 10:32:58,918 INFO L226 Difference]: Without dead ends: 623 [2021-01-06 10:32:58,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:32:58,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2021-01-06 10:32:58,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 144. [2021-01-06 10:32:58,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2021-01-06 10:32:58,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 158 transitions. [2021-01-06 10:32:58,936 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 158 transitions. Word has length 111 [2021-01-06 10:32:58,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:32:58,936 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 158 transitions. [2021-01-06 10:32:58,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 10:32:58,936 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 158 transitions. [2021-01-06 10:32:58,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-01-06 10:32:58,937 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:58,937 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:59,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 10:32:59,149 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:59,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:59,149 INFO L82 PathProgramCache]: Analyzing trace with hash 234100406, now seen corresponding path program 2 times [2021-01-06 10:32:59,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:59,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963954795] [2021-01-06 10:32:59,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:59,158 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:32:59,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1573806596] [2021-01-06 10:32:59,158 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:59,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:32:59,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:32:59,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 10:32:59,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:33:00,063 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:33:00,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963954795] [2021-01-06 10:33:00,064 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:33:00,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573806596] [2021-01-06 10:33:00,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:33:00,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-01-06 10:33:00,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994190972] [2021-01-06 10:33:00,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 10:33:00,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:33:00,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 10:33:00,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:33:00,066 INFO L87 Difference]: Start difference. First operand 144 states and 158 transitions. Second operand 22 states. [2021-01-06 10:33:00,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:33:00,728 INFO L93 Difference]: Finished difference Result 755 states and 884 transitions. [2021-01-06 10:33:00,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 10:33:00,730 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 121 [2021-01-06 10:33:00,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:33:00,734 INFO L225 Difference]: With dead ends: 755 [2021-01-06 10:33:00,734 INFO L226 Difference]: Without dead ends: 697 [2021-01-06 10:33:00,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:33:00,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2021-01-06 10:33:00,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 154. [2021-01-06 10:33:00,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2021-01-06 10:33:00,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 168 transitions. [2021-01-06 10:33:00,754 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 168 transitions. Word has length 121 [2021-01-06 10:33:00,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:33:00,754 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 168 transitions. [2021-01-06 10:33:00,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 10:33:00,754 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 168 transitions. [2021-01-06 10:33:00,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-01-06 10:33:00,755 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:33:00,755 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:33:00,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 10:33:00,970 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:33:00,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:33:00,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1558010838, now seen corresponding path program 3 times [2021-01-06 10:33:00,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:33:00,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630787446] [2021-01-06 10:33:00,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:33:00,979 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:33:00,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1426660461] [2021-01-06 10:33:00,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:33:01,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:33:01,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:33:01,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:33:01,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:33:01,294 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:33:01,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 165 proven. 4 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2021-01-06 10:33:01,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630787446] [2021-01-06 10:33:01,411 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:33:01,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426660461] [2021-01-06 10:33:01,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:33:01,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:33:01,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376318899] [2021-01-06 10:33:01,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:33:01,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:33:01,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:33:01,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:33:01,413 INFO L87 Difference]: Start difference. First operand 154 states and 168 transitions. Second operand 7 states. [2021-01-06 10:33:01,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:33:01,695 INFO L93 Difference]: Finished difference Result 247 states and 283 transitions. [2021-01-06 10:33:01,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:33:01,696 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 131 [2021-01-06 10:33:01,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:33:01,698 INFO L225 Difference]: With dead ends: 247 [2021-01-06 10:33:01,698 INFO L226 Difference]: Without dead ends: 214 [2021-01-06 10:33:01,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:33:01,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-01-06 10:33:01,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 164. [2021-01-06 10:33:01,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2021-01-06 10:33:01,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 182 transitions. [2021-01-06 10:33:01,715 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 182 transitions. Word has length 131 [2021-01-06 10:33:01,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:33:01,715 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 182 transitions. [2021-01-06 10:33:01,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:33:01,715 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 182 transitions. [2021-01-06 10:33:01,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-01-06 10:33:01,716 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:33:01,716 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 19, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:33:01,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 10:33:01,931 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:33:01,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:33:01,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1275756781, now seen corresponding path program 4 times [2021-01-06 10:33:01,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:33:01,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123249659] [2021-01-06 10:33:01,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:33:01,941 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:33:01,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [358598930] [2021-01-06 10:33:01,941 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:33:02,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:33:02,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:33:02,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 10:33:02,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:33:03,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1117 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:33:03,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123249659] [2021-01-06 10:33:03,228 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:33:03,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358598930] [2021-01-06 10:33:03,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:33:03,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-01-06 10:33:03,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271573707] [2021-01-06 10:33:03,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 10:33:03,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:33:03,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 10:33:03,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:33:03,230 INFO L87 Difference]: Start difference. First operand 164 states and 182 transitions. Second operand 25 states. [2021-01-06 10:33:04,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:33:04,008 INFO L93 Difference]: Finished difference Result 886 states and 1042 transitions. [2021-01-06 10:33:04,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 10:33:04,009 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 136 [2021-01-06 10:33:04,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:33:04,013 INFO L225 Difference]: With dead ends: 886 [2021-01-06 10:33:04,013 INFO L226 Difference]: Without dead ends: 818 [2021-01-06 10:33:04,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:33:04,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-01-06 10:33:04,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 179. [2021-01-06 10:33:04,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2021-01-06 10:33:04,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 197 transitions. [2021-01-06 10:33:04,034 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 197 transitions. Word has length 136 [2021-01-06 10:33:04,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:33:04,034 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 197 transitions. [2021-01-06 10:33:04,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 10:33:04,035 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 197 transitions. [2021-01-06 10:33:04,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-01-06 10:33:04,036 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:33:04,036 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 22, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:33:04,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:33:04,252 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:33:04,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:33:04,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1031815848, now seen corresponding path program 5 times [2021-01-06 10:33:04,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:33:04,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701520164] [2021-01-06 10:33:04,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:33:04,261 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:33:04,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [475675004] [2021-01-06 10:33:04,261 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:33:05,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2021-01-06 10:33:05,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:33:05,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 10:33:05,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:33:06,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1450 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:33:06,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701520164] [2021-01-06 10:33:06,678 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:33:06,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475675004] [2021-01-06 10:33:06,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:33:06,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-01-06 10:33:06,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096677185] [2021-01-06 10:33:06,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 10:33:06,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:33:06,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 10:33:06,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:33:06,680 INFO L87 Difference]: Start difference. First operand 179 states and 197 transitions. Second operand 28 states. [2021-01-06 10:33:07,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:33:07,558 INFO L93 Difference]: Finished difference Result 997 states and 1171 transitions. [2021-01-06 10:33:07,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 10:33:07,560 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 151 [2021-01-06 10:33:07,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:33:07,564 INFO L225 Difference]: With dead ends: 997 [2021-01-06 10:33:07,564 INFO L226 Difference]: Without dead ends: 929 [2021-01-06 10:33:07,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:33:07,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-01-06 10:33:07,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 194. [2021-01-06 10:33:07,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2021-01-06 10:33:07,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 212 transitions. [2021-01-06 10:33:07,589 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 212 transitions. Word has length 151 [2021-01-06 10:33:07,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:33:07,589 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 212 transitions. [2021-01-06 10:33:07,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 10:33:07,589 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 212 transitions. [2021-01-06 10:33:07,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-01-06 10:33:07,590 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:33:07,591 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 25, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:33:07,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:33:07,798 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:33:07,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:33:07,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1801633165, now seen corresponding path program 6 times [2021-01-06 10:33:07,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:33:07,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614955331] [2021-01-06 10:33:07,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:33:07,809 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:33:07,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1190450439] [2021-01-06 10:33:07,809 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:33:08,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 10:33:08,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:33:08,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:33:08,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:33:08,365 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:33:08,398 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:33:08,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1828 backedges. 341 proven. 13 refuted. 0 times theorem prover too weak. 1474 trivial. 0 not checked. [2021-01-06 10:33:08,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614955331] [2021-01-06 10:33:08,530 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:33:08,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190450439] [2021-01-06 10:33:08,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:33:08,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:33:08,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060978542] [2021-01-06 10:33:08,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:33:08,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:33:08,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:33:08,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:33:08,531 INFO L87 Difference]: Start difference. First operand 194 states and 212 transitions. Second operand 8 states. [2021-01-06 10:33:08,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:33:08,892 INFO L93 Difference]: Finished difference Result 312 states and 357 transitions. [2021-01-06 10:33:08,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:33:08,893 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 166 [2021-01-06 10:33:08,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:33:08,894 INFO L225 Difference]: With dead ends: 312 [2021-01-06 10:33:08,895 INFO L226 Difference]: Without dead ends: 279 [2021-01-06 10:33:08,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:33:08,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-01-06 10:33:08,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 204. [2021-01-06 10:33:08,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2021-01-06 10:33:08,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 226 transitions. [2021-01-06 10:33:08,914 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 226 transitions. Word has length 166 [2021-01-06 10:33:08,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:33:08,914 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 226 transitions. [2021-01-06 10:33:08,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:33:08,915 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 226 transitions. [2021-01-06 10:33:08,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-01-06 10:33:08,916 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:33:08,916 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 25, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:33:09,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-01-06 10:33:09,120 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:33:09,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:33:09,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1258378476, now seen corresponding path program 4 times [2021-01-06 10:33:09,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:33:09,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588139086] [2021-01-06 10:33:09,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:33:09,129 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:33:09,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [503892609] [2021-01-06 10:33:09,130 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:33:09,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:33:09,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:33:09,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 10:33:09,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:33:11,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:33:11,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588139086] [2021-01-06 10:33:11,194 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:33:11,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503892609] [2021-01-06 10:33:11,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:33:11,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-01-06 10:33:11,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911642964] [2021-01-06 10:33:11,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 10:33:11,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:33:11,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 10:33:11,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:33:11,196 INFO L87 Difference]: Start difference. First operand 204 states and 226 transitions. Second operand 32 states. [2021-01-06 10:33:12,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:33:12,239 INFO L93 Difference]: Finished difference Result 1165 states and 1372 transitions. [2021-01-06 10:33:12,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 10:33:12,240 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 171 [2021-01-06 10:33:12,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:33:12,245 INFO L225 Difference]: With dead ends: 1165 [2021-01-06 10:33:12,246 INFO L226 Difference]: Without dead ends: 1087 [2021-01-06 10:33:12,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:33:12,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2021-01-06 10:33:12,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 224. [2021-01-06 10:33:12,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2021-01-06 10:33:12,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 246 transitions. [2021-01-06 10:33:12,272 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 246 transitions. Word has length 171 [2021-01-06 10:33:12,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:33:12,273 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 246 transitions. [2021-01-06 10:33:12,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 10:33:12,273 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 246 transitions. [2021-01-06 10:33:12,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-01-06 10:33:12,274 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:33:12,274 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 31, 29, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:33:12,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:33:12,489 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:33:12,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:33:12,489 INFO L82 PathProgramCache]: Analyzing trace with hash -294634156, now seen corresponding path program 5 times [2021-01-06 10:33:12,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:33:12,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474839442] [2021-01-06 10:33:12,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:33:12,498 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:33:12,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1637411545] [2021-01-06 10:33:12,499 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:33:20,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2021-01-06 10:33:20,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:33:20,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 10:33:20,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:33:21,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2558 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:33:21,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474839442] [2021-01-06 10:33:21,914 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:33:21,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637411545] [2021-01-06 10:33:21,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:33:21,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2021-01-06 10:33:21,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20140135] [2021-01-06 10:33:21,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 10:33:21,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:33:21,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 10:33:21,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 10:33:21,919 INFO L87 Difference]: Start difference. First operand 224 states and 246 transitions. Second operand 36 states. [2021-01-06 10:33:23,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:33:23,420 INFO L93 Difference]: Finished difference Result 1313 states and 1544 transitions. [2021-01-06 10:33:23,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 10:33:23,422 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 191 [2021-01-06 10:33:23,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:33:23,428 INFO L225 Difference]: With dead ends: 1313 [2021-01-06 10:33:23,428 INFO L226 Difference]: Without dead ends: 1235 [2021-01-06 10:33:23,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 10:33:23,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2021-01-06 10:33:23,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 244. [2021-01-06 10:33:23,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2021-01-06 10:33:23,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 266 transitions. [2021-01-06 10:33:23,459 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 266 transitions. Word has length 191 [2021-01-06 10:33:23,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:33:23,460 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 266 transitions. [2021-01-06 10:33:23,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 10:33:23,460 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 266 transitions. [2021-01-06 10:33:23,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-01-06 10:33:23,461 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:33:23,462 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 33, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:33:23,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-06 10:33:23,666 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:33:23,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:33:23,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1738682260, now seen corresponding path program 6 times [2021-01-06 10:33:23,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:33:23,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797356435] [2021-01-06 10:33:23,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:33:23,676 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:33:23,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [36023061] [2021-01-06 10:33:23,676 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:33:24,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 10:33:24,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:33:24,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 10:33:24,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:33:24,231 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 [2021-01-06 10:33:24,231 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:33:24,249 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:33:24,249 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:33:24,250 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-01-06 10:33:24,286 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-01-06 10:33:24,287 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:33:24,300 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:33:24,300 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:33:24,301 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:24, output treesize:13 [2021-01-06 10:33:24,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3232 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 3045 trivial. 0 not checked. [2021-01-06 10:33:24,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797356435] [2021-01-06 10:33:24,972 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:33:24,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36023061] [2021-01-06 10:33:24,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:33:24,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-01-06 10:33:24,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906676040] [2021-01-06 10:33:24,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 10:33:24,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:33:24,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 10:33:24,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:33:24,974 INFO L87 Difference]: Start difference. First operand 244 states and 266 transitions. Second operand 14 states. [2021-01-06 10:33:25,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:33:25,781 INFO L93 Difference]: Finished difference Result 258 states and 282 transitions. [2021-01-06 10:33:25,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 10:33:25,782 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 211 [2021-01-06 10:33:25,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:33:25,784 INFO L225 Difference]: With dead ends: 258 [2021-01-06 10:33:25,784 INFO L226 Difference]: Without dead ends: 256 [2021-01-06 10:33:25,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:33:25,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-01-06 10:33:25,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 249. [2021-01-06 10:33:25,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2021-01-06 10:33:25,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 272 transitions. [2021-01-06 10:33:25,808 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 272 transitions. Word has length 211 [2021-01-06 10:33:25,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:33:25,809 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 272 transitions. [2021-01-06 10:33:25,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 10:33:25,809 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 272 transitions. [2021-01-06 10:33:25,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-01-06 10:33:25,810 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:33:25,810 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 33, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:33:26,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:33:26,016 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:33:26,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:33:26,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1394624252, now seen corresponding path program 7 times [2021-01-06 10:33:26,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:33:26,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297815243] [2021-01-06 10:33:26,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:33:26,027 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:33:26,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [986749463] [2021-01-06 10:33:26,027 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:33:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:33:26,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 10:33:26,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:33:28,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3256 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 10:33:28,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297815243] [2021-01-06 10:33:28,233 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:33:28,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986749463] [2021-01-06 10:33:28,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:33:28,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2021-01-06 10:33:28,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145340552] [2021-01-06 10:33:28,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 10:33:28,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:33:28,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 10:33:28,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:33:28,236 INFO L87 Difference]: Start difference. First operand 249 states and 272 transitions. Second operand 40 states. [2021-01-06 10:33:29,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:33:29,942 INFO L93 Difference]: Finished difference Result 1627 states and 1915 transitions. [2021-01-06 10:33:29,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 10:33:29,943 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 216 [2021-01-06 10:33:29,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:33:29,948 INFO L225 Difference]: With dead ends: 1627 [2021-01-06 10:33:29,948 INFO L226 Difference]: Without dead ends: 1544 [2021-01-06 10:33:29,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:33:29,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-01-06 10:33:29,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 269. [2021-01-06 10:33:29,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2021-01-06 10:33:29,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 292 transitions. [2021-01-06 10:33:29,984 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 292 transitions. Word has length 216 [2021-01-06 10:33:29,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:33:29,985 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 292 transitions. [2021-01-06 10:33:29,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 10:33:29,985 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 292 transitions. [2021-01-06 10:33:29,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-01-06 10:33:29,987 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:33:29,987 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 39, 37, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:33:30,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-06 10:33:30,201 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:33:30,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:33:30,202 INFO L82 PathProgramCache]: Analyzing trace with hash -906535748, now seen corresponding path program 8 times [2021-01-06 10:33:30,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:33:30,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963566974] [2021-01-06 10:33:30,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:33:30,213 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:33:30,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [70566895] [2021-01-06 10:33:30,214 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:33:30,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:33:30,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:33:30,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 43 conjunts are in the unsatisfiable core [2021-01-06 10:33:30,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:33:32,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4010 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 10:33:32,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963566974] [2021-01-06 10:33:32,895 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:33:32,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70566895] [2021-01-06 10:33:32,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:33:32,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2021-01-06 10:33:32,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035927952] [2021-01-06 10:33:32,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-01-06 10:33:32,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:33:32,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-01-06 10:33:32,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 10:33:32,899 INFO L87 Difference]: Start difference. First operand 269 states and 292 transitions. Second operand 44 states. [2021-01-06 10:33:34,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:33:34,834 INFO L93 Difference]: Finished difference Result 1795 states and 2111 transitions. [2021-01-06 10:33:34,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 10:33:34,836 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 236 [2021-01-06 10:33:34,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:33:34,847 INFO L225 Difference]: With dead ends: 1795 [2021-01-06 10:33:34,847 INFO L226 Difference]: Without dead ends: 1712 [2021-01-06 10:33:34,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 10:33:34,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2021-01-06 10:33:34,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 289. [2021-01-06 10:33:34,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2021-01-06 10:33:34,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 312 transitions. [2021-01-06 10:33:34,887 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 312 transitions. Word has length 236 [2021-01-06 10:33:34,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:33:34,888 INFO L481 AbstractCegarLoop]: Abstraction has 289 states and 312 transitions. [2021-01-06 10:33:34,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2021-01-06 10:33:34,888 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 312 transitions. [2021-01-06 10:33:34,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-01-06 10:33:34,889 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:33:34,890 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 43, 41, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:33:35,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 10:33:35,103 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:33:35,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:33:35,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1848251004, now seen corresponding path program 9 times [2021-01-06 10:33:35,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:33:35,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254295641] [2021-01-06 10:33:35,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:33:35,114 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:33:35,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [268149810] [2021-01-06 10:33:35,115 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:33:35,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 10:33:35,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:33:35,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 10:33:35,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:33:35,790 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 23 treesize of output 19 [2021-01-06 10:33:35,791 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:33:35,843 INFO L625 ElimStorePlain]: treesize reduction 55, result has 32.1 percent of original size [2021-01-06 10:33:35,843 INFO L515 ElimStorePlain]: Eliminatee |v_#memory_int_16| vanished before elimination [2021-01-06 10:33:35,844 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:33:35,844 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:85, output treesize:26 [2021-01-06 10:33:35,883 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-01-06 10:33:35,884 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:33:35,901 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:33:35,902 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:33:35,902 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:18 [2021-01-06 10:33:38,496 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 [2021-01-06 10:33:38,497 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:33:38,521 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:33:38,521 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:33:38,522 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:27 [2021-01-06 10:33:38,586 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-01-06 10:33:38,588 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:33:38,607 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:33:38,608 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:33:38,608 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:19 [2021-01-06 10:33:38,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4844 backedges. 414 proven. 178 refuted. 0 times theorem prover too weak. 4252 trivial. 0 not checked. [2021-01-06 10:33:38,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254295641] [2021-01-06 10:33:38,933 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:33:38,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268149810] [2021-01-06 10:33:38,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:33:38,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-01-06 10:33:38,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536263969] [2021-01-06 10:33:38,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 10:33:38,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:33:38,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 10:33:38,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=135, Unknown=1, NotChecked=0, Total=182 [2021-01-06 10:33:38,935 INFO L87 Difference]: Start difference. First operand 289 states and 312 transitions. Second operand 14 states. [2021-01-06 10:33:55,686 WARN L197 SmtUtils]: Spent 2.34 s on a formula simplification that was a NOOP. DAG size: 28 [2021-01-06 10:34:00,704 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-01-06 10:34:03,941 WARN L197 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-01-06 10:34:04,638 WARN L197 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-01-06 10:34:05,153 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-01-06 10:34:16,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:34:16,759 INFO L93 Difference]: Finished difference Result 463 states and 541 transitions. [2021-01-06 10:34:16,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 10:34:16,760 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 256 [2021-01-06 10:34:16,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:34:16,761 INFO L225 Difference]: With dead ends: 463 [2021-01-06 10:34:16,761 INFO L226 Difference]: Without dead ends: 380 [2021-01-06 10:34:16,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=116, Invalid=387, Unknown=3, NotChecked=0, Total=506 [2021-01-06 10:34:16,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-01-06 10:34:16,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 321. [2021-01-06 10:34:16,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2021-01-06 10:34:16,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 345 transitions. [2021-01-06 10:34:16,789 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 345 transitions. Word has length 256 [2021-01-06 10:34:16,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:34:16,789 INFO L481 AbstractCegarLoop]: Abstraction has 321 states and 345 transitions. [2021-01-06 10:34:16,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 10:34:16,789 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 345 transitions. [2021-01-06 10:34:16,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-01-06 10:34:16,791 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:34:16,791 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 41, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:34:16,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 10:34:16,992 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:34:16,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:34:16,993 INFO L82 PathProgramCache]: Analyzing trace with hash -201136838, now seen corresponding path program 7 times [2021-01-06 10:34:16,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:34:16,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033749367] [2021-01-06 10:34:16,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:34:17,003 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:34:17,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1543864703] [2021-01-06 10:34:17,003 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:34:17,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:34:17,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 47 conjunts are in the unsatisfiable core [2021-01-06 10:34:17,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:34:20,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4844 backedges. 0 proven. 4774 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 10:34:20,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033749367] [2021-01-06 10:34:20,749 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:34:20,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543864703] [2021-01-06 10:34:20,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:34:20,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2021-01-06 10:34:20,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770911309] [2021-01-06 10:34:20,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-01-06 10:34:20,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:34:20,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-01-06 10:34:20,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 10:34:20,751 INFO L87 Difference]: Start difference. First operand 321 states and 345 transitions. Second operand 48 states. [2021-01-06 10:34:22,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:34:22,955 INFO L93 Difference]: Finished difference Result 2027 states and 2373 transitions. [2021-01-06 10:34:22,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-06 10:34:22,957 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 256 [2021-01-06 10:34:22,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:34:22,963 INFO L225 Difference]: With dead ends: 2027 [2021-01-06 10:34:22,963 INFO L226 Difference]: Without dead ends: 1912 [2021-01-06 10:34:22,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 10:34:22,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1912 states. [2021-01-06 10:34:23,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1912 to 341. [2021-01-06 10:34:23,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2021-01-06 10:34:23,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 365 transitions. [2021-01-06 10:34:23,005 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 365 transitions. Word has length 256 [2021-01-06 10:34:23,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:34:23,006 INFO L481 AbstractCegarLoop]: Abstraction has 341 states and 365 transitions. [2021-01-06 10:34:23,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2021-01-06 10:34:23,006 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 365 transitions. [2021-01-06 10:34:23,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2021-01-06 10:34:23,007 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:34:23,007 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 45, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:34:23,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 10:34:23,208 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:34:23,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:34:23,209 INFO L82 PathProgramCache]: Analyzing trace with hash 595671802, now seen corresponding path program 8 times [2021-01-06 10:34:23,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:34:23,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845310097] [2021-01-06 10:34:23,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:34:23,218 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:34:23,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [748285169] [2021-01-06 10:34:23,219 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:34:23,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:34:23,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:34:23,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 51 conjunts are in the unsatisfiable core [2021-01-06 10:34:23,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:34:27,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5758 backedges. 0 proven. 5688 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 10:34:27,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845310097] [2021-01-06 10:34:27,460 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:34:27,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748285169] [2021-01-06 10:34:27,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:34:27,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2021-01-06 10:34:27,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546070444] [2021-01-06 10:34:27,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-01-06 10:34:27,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:34:27,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-01-06 10:34:27,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 10:34:27,463 INFO L87 Difference]: Start difference. First operand 341 states and 365 transitions. Second operand 52 states. [2021-01-06 10:34:30,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:34:30,197 INFO L93 Difference]: Finished difference Result 2195 states and 2569 transitions. [2021-01-06 10:34:30,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-01-06 10:34:30,198 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 276 [2021-01-06 10:34:30,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:34:30,204 INFO L225 Difference]: With dead ends: 2195 [2021-01-06 10:34:30,204 INFO L226 Difference]: Without dead ends: 2080 [2021-01-06 10:34:30,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 10:34:30,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2021-01-06 10:34:30,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 361. [2021-01-06 10:34:30,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2021-01-06 10:34:30,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 385 transitions. [2021-01-06 10:34:30,246 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 385 transitions. Word has length 276 [2021-01-06 10:34:30,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:34:30,246 INFO L481 AbstractCegarLoop]: Abstraction has 361 states and 385 transitions. [2021-01-06 10:34:30,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2021-01-06 10:34:30,246 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 385 transitions. [2021-01-06 10:34:30,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2021-01-06 10:34:30,248 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:34:30,248 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 49, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:34:30,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 10:34:30,460 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:34:30,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:34:30,460 INFO L82 PathProgramCache]: Analyzing trace with hash -465882950, now seen corresponding path program 9 times [2021-01-06 10:34:30,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:34:30,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954133902] [2021-01-06 10:34:30,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:34:30,471 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:34:30,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [872094734] [2021-01-06 10:34:30,472 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:34:30,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 10:34:30,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:34:30,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:34:30,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:34:31,050 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:34:31,103 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:34:31,153 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:34:31,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6752 backedges. 919 proven. 27 refuted. 0 times theorem prover too weak. 5806 trivial. 0 not checked. [2021-01-06 10:34:31,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954133902] [2021-01-06 10:34:31,399 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:34:31,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872094734] [2021-01-06 10:34:31,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:34:31,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:34:31,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644880542] [2021-01-06 10:34:31,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:34:31,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:34:31,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:34:31,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:34:31,401 INFO L87 Difference]: Start difference. First operand 361 states and 385 transitions. Second operand 9 states. [2021-01-06 10:34:32,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:34:32,023 INFO L93 Difference]: Finished difference Result 572 states and 632 transitions. [2021-01-06 10:34:32,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 10:34:32,025 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 296 [2021-01-06 10:34:32,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:34:32,027 INFO L225 Difference]: With dead ends: 572 [2021-01-06 10:34:32,027 INFO L226 Difference]: Without dead ends: 534 [2021-01-06 10:34:32,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=142, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:34:32,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-01-06 10:34:32,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 347. [2021-01-06 10:34:32,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2021-01-06 10:34:32,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 368 transitions. [2021-01-06 10:34:32,062 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 368 transitions. Word has length 296 [2021-01-06 10:34:32,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:34:32,062 INFO L481 AbstractCegarLoop]: Abstraction has 347 states and 368 transitions. [2021-01-06 10:34:32,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:34:32,062 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 368 transitions. [2021-01-06 10:34:32,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2021-01-06 10:34:32,064 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:34:32,064 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 56, 55, 49, 7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:34:32,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:34:32,265 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:34:32,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:34:32,266 INFO L82 PathProgramCache]: Analyzing trace with hash 306208760, now seen corresponding path program 10 times [2021-01-06 10:34:32,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:34:32,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197886887] [2021-01-06 10:34:32,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:34:32,275 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:34:32,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [922290182] [2021-01-06 10:34:32,275 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true