/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/reducercommutativity/rangesum10.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:14:53,315 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:14:53,322 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:14:53,402 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:14:53,403 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:14:53,409 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:14:53,417 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:14:53,426 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:14:53,434 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:14:53,445 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:14:53,452 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:14:53,453 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:14:53,454 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:14:53,459 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:14:53,463 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:14:53,465 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:14:53,483 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:14:53,485 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:14:53,487 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:14:53,490 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:14:53,492 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:14:53,495 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:14:53,500 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:14:53,507 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:14:53,519 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:14:53,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:14:53,547 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:14:53,548 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:14:53,551 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 10:14:53,630 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:14:53,631 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:14:53,640 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:14:53,641 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:14:53,641 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:14:53,642 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:14:53,642 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:14:53,643 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:14:53,643 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:14:53,644 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:14:53,646 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:14:53,647 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:14:53,647 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:14:53,647 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:14:53,648 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:14:53,648 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:14:53,648 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:14:53,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:14:53,649 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:14:53,649 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:14:53,649 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:14:53,649 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:14:53,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:14:53,650 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:14:53,650 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:14:53,651 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:14:54,191 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:14:54,273 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:14:54,278 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:14:54,280 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:14:54,282 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:14:54,284 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/rangesum10.i [2021-01-06 10:14:54,407 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d6a4ec3b8/fa196beec9d0435dbb9700327514a5ed/FLAG382420a76 [2021-01-06 10:14:55,396 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:14:55,397 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum10.i [2021-01-06 10:14:55,410 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d6a4ec3b8/fa196beec9d0435dbb9700327514a5ed/FLAG382420a76 [2021-01-06 10:14:55,601 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d6a4ec3b8/fa196beec9d0435dbb9700327514a5ed [2021-01-06 10:14:55,605 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:14:55,612 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:14:55,614 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:14:55,615 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:14:55,621 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:14:55,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:14:55" (1/1) ... [2021-01-06 10:14:55,628 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79a82fc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:14:55, skipping insertion in model container [2021-01-06 10:14:55,629 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:14:55" (1/1) ... [2021-01-06 10:14:55,644 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:14:55,683 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~x,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~x,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~cnt~0,] left hand side expression in assignment: lhs: VariableLHS[~ret~1,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[0]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[1]]] left hand side expression in assignment: lhs: VariableLHS[~ret2~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IdentifierExpression[~i~2,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[9]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2021-01-06 10:14:55,934 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/reducercommutativity/rangesum10.i[1465,1478] [2021-01-06 10:14:55,941 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:14:55,956 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~x,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~x,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~cnt~0,] left hand side expression in assignment: lhs: VariableLHS[~ret~1,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret2~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#x~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~2,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[36],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2021-01-06 10:14:55,992 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/reducercommutativity/rangesum10.i[1465,1478] [2021-01-06 10:14:55,994 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:14:56,018 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:14:56,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:14:56 WrapperNode [2021-01-06 10:14:56,019 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:14:56,022 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:14:56,022 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:14:56,022 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:14:56,036 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:14:56" (1/1) ... [2021-01-06 10:14:56,050 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:14:56" (1/1) ... [2021-01-06 10:14:56,093 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:14:56,094 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:14:56,095 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:14:56,095 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:14:56,117 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:14:56" (1/1) ... [2021-01-06 10:14:56,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:14:56" (1/1) ... [2021-01-06 10:14:56,122 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:14:56" (1/1) ... [2021-01-06 10:14:56,122 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:14:56" (1/1) ... [2021-01-06 10:14:56,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:14:56" (1/1) ... [2021-01-06 10:14:56,142 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:14:56" (1/1) ... [2021-01-06 10:14:56,145 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:14:56" (1/1) ... [2021-01-06 10:14:56,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:14:56,151 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:14:56,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:14:56,152 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:14:56,153 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:14:56" (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 10:14:56,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:14:56,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:14:56,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:14:56,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:14:56,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:14:56,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:14:56,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:14:57,020 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:14:57,020 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-01-06 10:14:57,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:14:57 BoogieIcfgContainer [2021-01-06 10:14:57,025 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:14:57,029 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:14:57,030 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:14:57,039 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:14:57,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:14:55" (1/3) ... [2021-01-06 10:14:57,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33ff286 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:14:57, skipping insertion in model container [2021-01-06 10:14:57,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:14:56" (2/3) ... [2021-01-06 10:14:57,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33ff286 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:14:57, skipping insertion in model container [2021-01-06 10:14:57,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:14:57" (3/3) ... [2021-01-06 10:14:57,047 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum10.i [2021-01-06 10:14:57,063 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:14:57,072 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:14:57,122 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:14:57,198 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:14:57,203 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:14:57,203 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:14:57,204 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:14:57,204 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:14:57,204 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:14:57,204 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:14:57,204 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:14:57,255 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2021-01-06 10:14:57,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 10:14:57,269 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:57,272 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:57,273 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:57,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:57,291 INFO L82 PathProgramCache]: Analyzing trace with hash -919167012, now seen corresponding path program 1 times [2021-01-06 10:14:57,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:57,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570837236] [2021-01-06 10:14:57,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:57,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:57,712 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 10:14:57,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570837236] [2021-01-06 10:14:57,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:14:57,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:14:57,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761063207] [2021-01-06 10:14:57,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:14:57,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:57,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:14:57,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:14:57,775 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2021-01-06 10:14:57,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:57,825 INFO L93 Difference]: Finished difference Result 56 states and 86 transitions. [2021-01-06 10:14:57,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:14:57,827 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2021-01-06 10:14:57,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:57,863 INFO L225 Difference]: With dead ends: 56 [2021-01-06 10:14:57,864 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 10:14:57,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:14:57,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 10:14:57,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-01-06 10:14:57,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 10:14:57,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2021-01-06 10:14:57,937 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 17 [2021-01-06 10:14:57,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:57,938 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2021-01-06 10:14:57,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:14:57,938 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2021-01-06 10:14:57,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 10:14:57,939 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:57,939 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:57,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:14:57,941 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:57,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:57,942 INFO L82 PathProgramCache]: Analyzing trace with hash 164788593, now seen corresponding path program 1 times [2021-01-06 10:14:57,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:57,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060206557] [2021-01-06 10:14:57,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:57,968 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:14:57,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [928519205] [2021-01-06 10:14:57,969 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 10:14:58,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:58,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 10:14:58,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:14:58,136 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 10:14:58,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060206557] [2021-01-06 10:14:58,138 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:14:58,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928519205] [2021-01-06 10:14:58,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:14:58,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:14:58,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046977888] [2021-01-06 10:14:58,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:14:58,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:58,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:14:58,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:14:58,145 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 3 states. [2021-01-06 10:14:58,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:58,169 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2021-01-06 10:14:58,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:14:58,170 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2021-01-06 10:14:58,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:58,172 INFO L225 Difference]: With dead ends: 50 [2021-01-06 10:14:58,172 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 10:14:58,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:14:58,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 10:14:58,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-01-06 10:14:58,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 10:14:58,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-01-06 10:14:58,183 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 17 [2021-01-06 10:14:58,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:58,184 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-01-06 10:14:58,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:14:58,184 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-01-06 10:14:58,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 10:14:58,185 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:58,185 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:58,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 10:14:58,404 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:58,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:58,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1403287377, now seen corresponding path program 1 times [2021-01-06 10:14:58,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:58,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090778235] [2021-01-06 10:14:58,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:58,483 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 10:14:58,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090778235] [2021-01-06 10:14:58,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118614796] [2021-01-06 10:14:58,485 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 10:14:58,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:58,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 10:14:58,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:14:58,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:14:58,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:14:58,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 10:14:58,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434918520] [2021-01-06 10:14:58,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:14:58,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:58,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:14:58,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:14:58,670 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 3 states. [2021-01-06 10:14:58,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:58,784 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2021-01-06 10:14:58,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:14:58,786 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2021-01-06 10:14:58,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:58,790 INFO L225 Difference]: With dead ends: 57 [2021-01-06 10:14:58,791 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 10:14:58,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:14:58,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 10:14:58,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-01-06 10:14:58,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 10:14:58,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-01-06 10:14:58,824 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2021-01-06 10:14:58,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:58,825 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-01-06 10:14:58,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:14:58,826 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-01-06 10:14:58,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 10:14:58,830 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:58,830 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:59,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:59,046 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:59,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:59,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1132417868, now seen corresponding path program 1 times [2021-01-06 10:14:59,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:59,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508233818] [2021-01-06 10:14:59,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:59,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 10:14:59,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508233818] [2021-01-06 10:14:59,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430212948] [2021-01-06 10:14:59,115 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 10:14:59,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:59,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 10:14:59,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:14:59,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:14:59,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:14:59,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 10:14:59,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072778091] [2021-01-06 10:14:59,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:14:59,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:59,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:14:59,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:14:59,293 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand 3 states. [2021-01-06 10:14:59,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:59,313 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2021-01-06 10:14:59,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:14:59,314 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2021-01-06 10:14:59,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:59,315 INFO L225 Difference]: With dead ends: 46 [2021-01-06 10:14:59,315 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 10:14:59,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:14:59,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 10:14:59,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-01-06 10:14:59,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 10:14:59,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2021-01-06 10:14:59,323 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 28 [2021-01-06 10:14:59,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:59,324 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2021-01-06 10:14:59,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:14:59,325 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2021-01-06 10:14:59,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 10:14:59,326 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:59,326 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:14:59,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:59,542 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:14:59,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:14:59,543 INFO L82 PathProgramCache]: Analyzing trace with hash 513768630, now seen corresponding path program 1 times [2021-01-06 10:14:59,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:14:59,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917227171] [2021-01-06 10:14:59,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:14:59,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:59,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:14:59,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917227171] [2021-01-06 10:14:59,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132633591] [2021-01-06 10:14:59,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:14:59,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:14:59,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:14:59,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:14:59,720 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 10:14:59,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:14:59,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 10:14:59,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464093999] [2021-01-06 10:14:59,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:14:59,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:14:59,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:14:59,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:14:59,726 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand 3 states. [2021-01-06 10:14:59,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:14:59,789 INFO L93 Difference]: Finished difference Result 78 states and 103 transitions. [2021-01-06 10:14:59,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:14:59,791 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2021-01-06 10:14:59,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:14:59,792 INFO L225 Difference]: With dead ends: 78 [2021-01-06 10:14:59,792 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 10:14:59,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:14:59,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 10:14:59,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2021-01-06 10:14:59,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 10:14:59,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2021-01-06 10:14:59,804 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 30 [2021-01-06 10:14:59,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:14:59,804 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2021-01-06 10:14:59,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:14:59,805 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2021-01-06 10:14:59,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 10:14:59,806 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:14:59,807 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:00,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:00,021 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:00,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:00,023 INFO L82 PathProgramCache]: Analyzing trace with hash -303820238, now seen corresponding path program 1 times [2021-01-06 10:15:00,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:00,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757225868] [2021-01-06 10:15:00,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:00,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:00,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:15:00,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757225868] [2021-01-06 10:15:00,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94126175] [2021-01-06 10:15:00,128 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 10:15:00,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:00,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:15:00,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:00,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:15:00,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:15:00,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 10:15:00,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270643949] [2021-01-06 10:15:00,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:15:00,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:00,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:15:00,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:15:00,321 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand 5 states. [2021-01-06 10:15:00,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:00,370 INFO L93 Difference]: Finished difference Result 90 states and 122 transitions. [2021-01-06 10:15:00,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:15:00,372 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2021-01-06 10:15:00,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:00,373 INFO L225 Difference]: With dead ends: 90 [2021-01-06 10:15:00,373 INFO L226 Difference]: Without dead ends: 49 [2021-01-06 10:15:00,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 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 10:15:00,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-01-06 10:15:00,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-01-06 10:15:00,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 10:15:00,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2021-01-06 10:15:00,403 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 30 [2021-01-06 10:15:00,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:00,404 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2021-01-06 10:15:00,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:15:00,406 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2021-01-06 10:15:00,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 10:15:00,408 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:00,408 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:00,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 10:15:00,625 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:00,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:00,627 INFO L82 PathProgramCache]: Analyzing trace with hash 612513716, now seen corresponding path program 2 times [2021-01-06 10:15:00,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:00,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016631864] [2021-01-06 10:15:00,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:00,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:00,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 10:15:00,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016631864] [2021-01-06 10:15:00,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210413339] [2021-01-06 10:15:00,686 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 10:15:00,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-01-06 10:15:00,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:00,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:15:00,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:00,961 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 10:15:00,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:00,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2021-01-06 10:15:00,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82151629] [2021-01-06 10:15:00,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:15:00,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:00,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:15:00,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:15:00,967 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand 8 states. [2021-01-06 10:15:01,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:01,102 INFO L93 Difference]: Finished difference Result 114 states and 143 transitions. [2021-01-06 10:15:01,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:15:01,103 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2021-01-06 10:15:01,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:01,106 INFO L225 Difference]: With dead ends: 114 [2021-01-06 10:15:01,106 INFO L226 Difference]: Without dead ends: 109 [2021-01-06 10:15:01,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:15:01,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-01-06 10:15:01,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2021-01-06 10:15:01,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 10:15:01,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 98 transitions. [2021-01-06 10:15:01,123 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 98 transitions. Word has length 32 [2021-01-06 10:15:01,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:01,123 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 98 transitions. [2021-01-06 10:15:01,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:15:01,124 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 98 transitions. [2021-01-06 10:15:01,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 10:15:01,126 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:01,126 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:01,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:01,340 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:01,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:01,342 INFO L82 PathProgramCache]: Analyzing trace with hash -582685651, now seen corresponding path program 1 times [2021-01-06 10:15:01,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:01,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297865561] [2021-01-06 10:15:01,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:01,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:01,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-01-06 10:15:01,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297865561] [2021-01-06 10:15:01,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301849144] [2021-01-06 10:15:01,406 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 10:15:01,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:01,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:15:01,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:01,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 10:15:01,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:15:01,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-01-06 10:15:01,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38792658] [2021-01-06 10:15:01,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:15:01,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:01,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:15:01,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:15:01,618 INFO L87 Difference]: Start difference. First operand 73 states and 98 transitions. Second operand 7 states. [2021-01-06 10:15:01,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:01,774 INFO L93 Difference]: Finished difference Result 162 states and 221 transitions. [2021-01-06 10:15:01,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:15:01,774 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2021-01-06 10:15:01,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:01,778 INFO L225 Difference]: With dead ends: 162 [2021-01-06 10:15:01,779 INFO L226 Difference]: Without dead ends: 96 [2021-01-06 10:15:01,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:15:01,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-01-06 10:15:01,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2021-01-06 10:15:01,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2021-01-06 10:15:01,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 115 transitions. [2021-01-06 10:15:01,793 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 115 transitions. Word has length 35 [2021-01-06 10:15:01,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:01,794 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 115 transitions. [2021-01-06 10:15:01,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:15:01,794 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 115 transitions. [2021-01-06 10:15:01,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 10:15:01,796 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:01,796 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:02,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:02,011 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:02,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:02,018 INFO L82 PathProgramCache]: Analyzing trace with hash 2109979210, now seen corresponding path program 2 times [2021-01-06 10:15:02,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:02,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789934102] [2021-01-06 10:15:02,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:02,073 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:02,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151406279] [2021-01-06 10:15:02,074 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 10:15:02,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:15:02,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:02,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:15:02,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:02,270 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-01-06 10:15:02,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789934102] [2021-01-06 10:15:02,271 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:02,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151406279] [2021-01-06 10:15:02,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:02,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:15:02,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939089564] [2021-01-06 10:15:02,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:15:02,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:02,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:15:02,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:15:02,275 INFO L87 Difference]: Start difference. First operand 90 states and 115 transitions. Second operand 6 states. [2021-01-06 10:15:02,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:02,307 INFO L93 Difference]: Finished difference Result 174 states and 224 transitions. [2021-01-06 10:15:02,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:15:02,308 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2021-01-06 10:15:02,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:02,309 INFO L225 Difference]: With dead ends: 174 [2021-01-06 10:15:02,309 INFO L226 Difference]: Without dead ends: 93 [2021-01-06 10:15:02,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 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 10:15:02,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-01-06 10:15:02,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-01-06 10:15:02,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2021-01-06 10:15:02,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 117 transitions. [2021-01-06 10:15:02,322 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 117 transitions. Word has length 46 [2021-01-06 10:15:02,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:02,323 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 117 transitions. [2021-01-06 10:15:02,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:15:02,323 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 117 transitions. [2021-01-06 10:15:02,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-06 10:15:02,326 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:02,326 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:02,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 10:15:02,541 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:02,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:02,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1002085324, now seen corresponding path program 3 times [2021-01-06 10:15:02,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:02,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284397667] [2021-01-06 10:15:02,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:02,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:02,607 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 10:15:02,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284397667] [2021-01-06 10:15:02,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:15:02,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:15:02,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060804585] [2021-01-06 10:15:02,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:15:02,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:02,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:15:02,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:15:02,610 INFO L87 Difference]: Start difference. First operand 92 states and 117 transitions. Second operand 4 states. [2021-01-06 10:15:02,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:02,683 INFO L93 Difference]: Finished difference Result 177 states and 232 transitions. [2021-01-06 10:15:02,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:15:02,684 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2021-01-06 10:15:02,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:02,685 INFO L225 Difference]: With dead ends: 177 [2021-01-06 10:15:02,685 INFO L226 Difference]: Without dead ends: 108 [2021-01-06 10:15:02,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 10:15:02,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-01-06 10:15:02,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 83. [2021-01-06 10:15:02,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-01-06 10:15:02,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2021-01-06 10:15:02,721 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 48 [2021-01-06 10:15:02,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:02,721 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2021-01-06 10:15:02,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:15:02,721 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2021-01-06 10:15:02,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-01-06 10:15:02,723 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:02,723 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:02,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-01-06 10:15:02,724 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:02,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:02,725 INFO L82 PathProgramCache]: Analyzing trace with hash 238121238, now seen corresponding path program 1 times [2021-01-06 10:15:02,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:02,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450903673] [2021-01-06 10:15:02,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:02,767 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:02,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2088618688] [2021-01-06 10:15:02,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:02,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:02,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:15:02,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:02,972 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-01-06 10:15:02,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450903673] [2021-01-06 10:15:02,973 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:02,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088618688] [2021-01-06 10:15:02,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:02,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:15:02,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718585201] [2021-01-06 10:15:02,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:15:02,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:02,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:15:02,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:15:02,976 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand 7 states. [2021-01-06 10:15:03,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:03,006 INFO L93 Difference]: Finished difference Result 158 states and 190 transitions. [2021-01-06 10:15:03,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:15:03,006 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2021-01-06 10:15:03,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:03,007 INFO L225 Difference]: With dead ends: 158 [2021-01-06 10:15:03,008 INFO L226 Difference]: Without dead ends: 86 [2021-01-06 10:15:03,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 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 10:15:03,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-01-06 10:15:03,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-01-06 10:15:03,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 10:15:03,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 101 transitions. [2021-01-06 10:15:03,016 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 101 transitions. Word has length 54 [2021-01-06 10:15:03,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:03,016 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 101 transitions. [2021-01-06 10:15:03,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:15:03,017 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 101 transitions. [2021-01-06 10:15:03,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 10:15:03,023 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:03,023 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:03,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:03,225 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:03,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:03,226 INFO L82 PathProgramCache]: Analyzing trace with hash -428363624, now seen corresponding path program 2 times [2021-01-06 10:15:03,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:03,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205049227] [2021-01-06 10:15:03,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:03,250 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:03,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1131075868] [2021-01-06 10:15:03,251 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 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 10:15:03,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:15:03,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:03,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:15:03,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:03,417 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-01-06 10:15:03,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205049227] [2021-01-06 10:15:03,418 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:03,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131075868] [2021-01-06 10:15:03,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:03,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:15:03,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888175171] [2021-01-06 10:15:03,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:15:03,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:03,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:15:03,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:15:03,421 INFO L87 Difference]: Start difference. First operand 85 states and 101 transitions. Second operand 8 states. [2021-01-06 10:15:03,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:03,458 INFO L93 Difference]: Finished difference Result 160 states and 192 transitions. [2021-01-06 10:15:03,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:15:03,458 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2021-01-06 10:15:03,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:03,459 INFO L225 Difference]: With dead ends: 160 [2021-01-06 10:15:03,460 INFO L226 Difference]: Without dead ends: 88 [2021-01-06 10:15:03,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 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 10:15:03,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-01-06 10:15:03,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-01-06 10:15:03,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-01-06 10:15:03,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2021-01-06 10:15:03,467 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 56 [2021-01-06 10:15:03,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:03,468 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2021-01-06 10:15:03,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:15:03,468 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2021-01-06 10:15:03,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 10:15:03,469 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:03,469 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:03,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:03,684 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:03,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:03,685 INFO L82 PathProgramCache]: Analyzing trace with hash -970188902, now seen corresponding path program 3 times [2021-01-06 10:15:03,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:03,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584285958] [2021-01-06 10:15:03,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:03,709 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:03,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [169511822] [2021-01-06 10:15:03,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:03,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:15:03,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:03,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:15:03,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:03,878 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-01-06 10:15:03,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584285958] [2021-01-06 10:15:03,879 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:03,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169511822] [2021-01-06 10:15:03,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:15:03,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:15:03,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733624695] [2021-01-06 10:15:03,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:15:03,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:03,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:15:03,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:15:03,882 INFO L87 Difference]: Start difference. First operand 87 states and 103 transitions. Second operand 4 states. [2021-01-06 10:15:03,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:03,928 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2021-01-06 10:15:03,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:15:03,929 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2021-01-06 10:15:03,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:03,930 INFO L225 Difference]: With dead ends: 116 [2021-01-06 10:15:03,930 INFO L226 Difference]: Without dead ends: 68 [2021-01-06 10:15:03,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 55 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 10:15:03,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-01-06 10:15:03,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2021-01-06 10:15:03,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 10:15:03,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2021-01-06 10:15:03,936 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 58 [2021-01-06 10:15:03,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:03,936 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2021-01-06 10:15:03,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:15:03,937 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2021-01-06 10:15:03,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 10:15:03,937 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:03,938 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:04,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:15:04,152 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:04,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:04,153 INFO L82 PathProgramCache]: Analyzing trace with hash -152540452, now seen corresponding path program 1 times [2021-01-06 10:15:04,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:04,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083749612] [2021-01-06 10:15:04,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:04,193 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:04,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1119238512] [2021-01-06 10:15:04,197 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 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 10:15:04,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:04,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:15:04,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:04,392 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-01-06 10:15:04,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083749612] [2021-01-06 10:15:04,393 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:04,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119238512] [2021-01-06 10:15:04,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:04,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 10:15:04,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298892376] [2021-01-06 10:15:04,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:15:04,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:04,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:15:04,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:15:04,397 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 9 states. [2021-01-06 10:15:04,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:04,458 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2021-01-06 10:15:04,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:15:04,459 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2021-01-06 10:15:04,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:04,460 INFO L225 Difference]: With dead ends: 106 [2021-01-06 10:15:04,461 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 10:15:04,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 50 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 10:15:04,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 10:15:04,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-01-06 10:15:04,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-01-06 10:15:04,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2021-01-06 10:15:04,469 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 58 [2021-01-06 10:15:04,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:04,469 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2021-01-06 10:15:04,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:15:04,469 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2021-01-06 10:15:04,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-01-06 10:15:04,470 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:04,471 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:04,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 10:15:04,686 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:04,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:04,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1155589794, now seen corresponding path program 2 times [2021-01-06 10:15:04,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:04,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989348204] [2021-01-06 10:15:04,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:04,711 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:04,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1530014577] [2021-01-06 10:15:04,712 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 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 10:15:04,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:15:04,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:04,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:15:04,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:04,952 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-01-06 10:15:04,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989348204] [2021-01-06 10:15:04,953 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:04,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530014577] [2021-01-06 10:15:04,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:04,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 10:15:04,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990656823] [2021-01-06 10:15:04,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:15:04,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:04,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:15:04,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:15:04,956 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 10 states. [2021-01-06 10:15:05,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:05,011 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2021-01-06 10:15:05,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:15:05,013 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2021-01-06 10:15:05,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:05,013 INFO L225 Difference]: With dead ends: 108 [2021-01-06 10:15:05,014 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 10:15:05,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 51 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 10:15:05,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 10:15:05,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-01-06 10:15:05,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 10:15:05,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2021-01-06 10:15:05,021 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 60 [2021-01-06 10:15:05,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:05,022 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2021-01-06 10:15:05,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:15:05,022 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2021-01-06 10:15:05,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-01-06 10:15:05,023 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:05,023 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:05,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 10:15:05,238 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:05,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:05,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1281634144, now seen corresponding path program 3 times [2021-01-06 10:15:05,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:05,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397130226] [2021-01-06 10:15:05,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:05,291 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:05,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1535094450] [2021-01-06 10:15:05,293 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 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 10:15:05,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:15:05,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:05,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:15:05,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:05,480 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:15:05,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397130226] [2021-01-06 10:15:05,481 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:05,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535094450] [2021-01-06 10:15:05,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:05,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-01-06 10:15:05,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814720348] [2021-01-06 10:15:05,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:15:05,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:05,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:15:05,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:15:05,484 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand 4 states. [2021-01-06 10:15:05,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:05,510 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2021-01-06 10:15:05,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:15:05,510 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2021-01-06 10:15:05,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:05,512 INFO L225 Difference]: With dead ends: 82 [2021-01-06 10:15:05,512 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 10:15:05,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 59 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 10:15:05,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 10:15:05,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-01-06 10:15:05,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-01-06 10:15:05,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2021-01-06 10:15:05,520 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 62 [2021-01-06 10:15:05,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:05,521 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2021-01-06 10:15:05,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:15:05,521 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2021-01-06 10:15:05,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-01-06 10:15:05,522 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:05,522 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:05,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:05,739 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:05,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:05,740 INFO L82 PathProgramCache]: Analyzing trace with hash 377274978, now seen corresponding path program 4 times [2021-01-06 10:15:05,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:05,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166372937] [2021-01-06 10:15:05,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:05,791 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:05,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1496162657] [2021-01-06 10:15:05,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:05,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:15:05,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:05,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:15:05,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:05,963 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-01-06 10:15:05,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166372937] [2021-01-06 10:15:05,964 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:05,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496162657] [2021-01-06 10:15:05,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:05,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 10:15:05,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096108207] [2021-01-06 10:15:05,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:15:05,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:05,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:15:05,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:15:05,970 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 5 states. [2021-01-06 10:15:06,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:06,080 INFO L93 Difference]: Finished difference Result 117 states and 133 transitions. [2021-01-06 10:15:06,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:15:06,081 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2021-01-06 10:15:06,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:06,082 INFO L225 Difference]: With dead ends: 117 [2021-01-06 10:15:06,083 INFO L226 Difference]: Without dead ends: 77 [2021-01-06 10:15:06,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 60 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 10:15:06,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-01-06 10:15:06,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2021-01-06 10:15:06,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-01-06 10:15:06,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2021-01-06 10:15:06,090 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 64 [2021-01-06 10:15:06,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:06,091 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2021-01-06 10:15:06,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:15:06,091 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2021-01-06 10:15:06,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-01-06 10:15:06,092 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:06,093 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:06,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 10:15:06,308 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:06,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:06,309 INFO L82 PathProgramCache]: Analyzing trace with hash -790114983, now seen corresponding path program 5 times [2021-01-06 10:15:06,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:06,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519661900] [2021-01-06 10:15:06,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:06,330 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:06,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [114232609] [2021-01-06 10:15:06,331 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 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 10:15:06,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-06 10:15:06,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:06,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:15:06,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:06,608 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-01-06 10:15:06,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519661900] [2021-01-06 10:15:06,609 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:06,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114232609] [2021-01-06 10:15:06,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:06,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:15:06,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454856286] [2021-01-06 10:15:06,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:15:06,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:06,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:15:06,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:15:06,612 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand 6 states. [2021-01-06 10:15:06,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:06,742 INFO L93 Difference]: Finished difference Result 132 states and 148 transitions. [2021-01-06 10:15:06,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:15:06,744 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2021-01-06 10:15:06,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:06,745 INFO L225 Difference]: With dead ends: 132 [2021-01-06 10:15:06,745 INFO L226 Difference]: Without dead ends: 86 [2021-01-06 10:15:06,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 68 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 10:15:06,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-01-06 10:15:06,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2021-01-06 10:15:06,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-01-06 10:15:06,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2021-01-06 10:15:06,754 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 73 [2021-01-06 10:15:06,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:06,755 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2021-01-06 10:15:06,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:15:06,755 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2021-01-06 10:15:06,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-01-06 10:15:06,756 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:06,757 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:06,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 10:15:06,973 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:06,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:06,974 INFO L82 PathProgramCache]: Analyzing trace with hash 426299330, now seen corresponding path program 6 times [2021-01-06 10:15:06,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:06,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196247171] [2021-01-06 10:15:06,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:07,002 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:07,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1261688166] [2021-01-06 10:15:07,002 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 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 10:15:07,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 10:15:07,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:07,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:15:07,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:07,524 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-01-06 10:15:07,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196247171] [2021-01-06 10:15:07,525 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:07,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261688166] [2021-01-06 10:15:07,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:07,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 10:15:07,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40247480] [2021-01-06 10:15:07,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:15:07,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:07,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:15:07,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:15:07,528 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand 5 states. [2021-01-06 10:15:07,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:07,564 INFO L93 Difference]: Finished difference Result 108 states and 117 transitions. [2021-01-06 10:15:07,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:15:07,565 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 82 [2021-01-06 10:15:07,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:07,566 INFO L225 Difference]: With dead ends: 108 [2021-01-06 10:15:07,566 INFO L226 Difference]: Without dead ends: 86 [2021-01-06 10:15:07,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 78 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 10:15:07,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-01-06 10:15:07,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-01-06 10:15:07,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 10:15:07,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2021-01-06 10:15:07,574 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 82 [2021-01-06 10:15:07,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:07,575 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2021-01-06 10:15:07,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:15:07,575 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2021-01-06 10:15:07,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-01-06 10:15:07,576 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:07,576 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:07,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:07,785 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:07,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:07,786 INFO L82 PathProgramCache]: Analyzing trace with hash -105690940, now seen corresponding path program 7 times [2021-01-06 10:15:07,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:07,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640026940] [2021-01-06 10:15:07,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:07,810 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:07,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1389797693] [2021-01-06 10:15:07,811 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 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 10:15:07,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:07,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:15:07,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:08,055 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-01-06 10:15:08,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640026940] [2021-01-06 10:15:08,057 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:08,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389797693] [2021-01-06 10:15:08,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:08,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 10:15:08,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616113894] [2021-01-06 10:15:08,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:15:08,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:08,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:15:08,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:15:08,061 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand 11 states. [2021-01-06 10:15:08,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:08,136 INFO L93 Difference]: Finished difference Result 154 states and 168 transitions. [2021-01-06 10:15:08,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:15:08,137 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 84 [2021-01-06 10:15:08,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:08,138 INFO L225 Difference]: With dead ends: 154 [2021-01-06 10:15:08,138 INFO L226 Difference]: Without dead ends: 88 [2021-01-06 10:15:08,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 74 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 10:15:08,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-01-06 10:15:08,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-01-06 10:15:08,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-01-06 10:15:08,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 94 transitions. [2021-01-06 10:15:08,146 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 94 transitions. Word has length 84 [2021-01-06 10:15:08,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:08,146 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 94 transitions. [2021-01-06 10:15:08,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:15:08,147 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 94 transitions. [2021-01-06 10:15:08,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-06 10:15:08,148 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:08,148 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:08,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:08,361 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:08,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:08,362 INFO L82 PathProgramCache]: Analyzing trace with hash 2063005894, now seen corresponding path program 8 times [2021-01-06 10:15:08,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:08,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671443131] [2021-01-06 10:15:08,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:08,386 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:08,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [648518186] [2021-01-06 10:15:08,387 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 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 10:15:08,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:15:08,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:08,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:15:08,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:08,690 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-01-06 10:15:08,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671443131] [2021-01-06 10:15:08,692 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:08,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648518186] [2021-01-06 10:15:08,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:08,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 10:15:08,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861214855] [2021-01-06 10:15:08,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 10:15:08,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:08,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 10:15:08,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:15:08,695 INFO L87 Difference]: Start difference. First operand 87 states and 94 transitions. Second operand 12 states. [2021-01-06 10:15:08,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:08,750 INFO L93 Difference]: Finished difference Result 155 states and 169 transitions. [2021-01-06 10:15:08,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:15:08,759 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 86 [2021-01-06 10:15:08,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:08,760 INFO L225 Difference]: With dead ends: 155 [2021-01-06 10:15:08,760 INFO L226 Difference]: Without dead ends: 89 [2021-01-06 10:15:08,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:15:08,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-01-06 10:15:08,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-01-06 10:15:08,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2021-01-06 10:15:08,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 96 transitions. [2021-01-06 10:15:08,774 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 96 transitions. Word has length 86 [2021-01-06 10:15:08,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:08,774 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 96 transitions. [2021-01-06 10:15:08,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 10:15:08,774 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 96 transitions. [2021-01-06 10:15:08,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-01-06 10:15:08,776 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:08,776 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:08,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:08,992 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:08,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:08,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1173442488, now seen corresponding path program 9 times [2021-01-06 10:15:08,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:08,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700668179] [2021-01-06 10:15:08,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:09,029 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:09,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [403641483] [2021-01-06 10:15:09,030 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 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 10:15:09,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:15:09,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:09,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:15:09,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:09,634 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-01-06 10:15:09,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700668179] [2021-01-06 10:15:09,635 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:09,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403641483] [2021-01-06 10:15:09,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:09,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 10:15:09,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849057112] [2021-01-06 10:15:09,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:15:09,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:09,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:15:09,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:15:09,638 INFO L87 Difference]: Start difference. First operand 89 states and 96 transitions. Second operand 5 states. [2021-01-06 10:15:09,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:09,745 INFO L93 Difference]: Finished difference Result 153 states and 173 transitions. [2021-01-06 10:15:09,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:15:09,745 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 88 [2021-01-06 10:15:09,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:09,747 INFO L225 Difference]: With dead ends: 153 [2021-01-06 10:15:09,747 INFO L226 Difference]: Without dead ends: 104 [2021-01-06 10:15:09,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 84 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 10:15:09,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-01-06 10:15:09,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2021-01-06 10:15:09,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-01-06 10:15:09,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2021-01-06 10:15:09,756 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 88 [2021-01-06 10:15:09,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:09,756 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2021-01-06 10:15:09,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:15:09,757 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2021-01-06 10:15:09,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-01-06 10:15:09,758 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:09,758 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:09,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 10:15:09,973 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:09,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:09,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1409703947, now seen corresponding path program 10 times [2021-01-06 10:15:09,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:09,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758622333] [2021-01-06 10:15:09,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:10,013 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:10,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [160051437] [2021-01-06 10:15:10,018 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 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 10:15:10,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:15:10,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:10,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:15:10,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:10,199 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2021-01-06 10:15:10,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758622333] [2021-01-06 10:15:10,200 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:10,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160051437] [2021-01-06 10:15:10,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:10,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:15:10,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290020249] [2021-01-06 10:15:10,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:15:10,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:10,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:15:10,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:15:10,204 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand 7 states. [2021-01-06 10:15:10,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:10,331 INFO L93 Difference]: Finished difference Result 173 states and 195 transitions. [2021-01-06 10:15:10,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:15:10,331 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 97 [2021-01-06 10:15:10,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:10,333 INFO L225 Difference]: With dead ends: 173 [2021-01-06 10:15:10,333 INFO L226 Difference]: Without dead ends: 110 [2021-01-06 10:15:10,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 91 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 10:15:10,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-01-06 10:15:10,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2021-01-06 10:15:10,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2021-01-06 10:15:10,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 117 transitions. [2021-01-06 10:15:10,342 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 117 transitions. Word has length 97 [2021-01-06 10:15:10,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:10,342 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 117 transitions. [2021-01-06 10:15:10,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:15:10,342 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 117 transitions. [2021-01-06 10:15:10,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-01-06 10:15:10,344 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:10,344 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 7, 7, 7, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:10,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 10:15:10,560 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:10,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:10,561 INFO L82 PathProgramCache]: Analyzing trace with hash -983224722, now seen corresponding path program 11 times [2021-01-06 10:15:10,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:10,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591180396] [2021-01-06 10:15:10,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:10,578 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:10,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [203449017] [2021-01-06 10:15:10,579 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 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 10:15:11,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-01-06 10:15:11,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:11,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:15:11,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:11,154 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2021-01-06 10:15:11,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591180396] [2021-01-06 10:15:11,155 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:11,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203449017] [2021-01-06 10:15:11,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:11,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:15:11,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489890465] [2021-01-06 10:15:11,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:15:11,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:11,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:15:11,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:15:11,158 INFO L87 Difference]: Start difference. First operand 107 states and 117 transitions. Second operand 8 states. [2021-01-06 10:15:11,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:11,314 INFO L93 Difference]: Finished difference Result 185 states and 207 transitions. [2021-01-06 10:15:11,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:15:11,316 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 106 [2021-01-06 10:15:11,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:11,317 INFO L225 Difference]: With dead ends: 185 [2021-01-06 10:15:11,317 INFO L226 Difference]: Without dead ends: 116 [2021-01-06 10:15:11,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 99 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 10:15:11,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-01-06 10:15:11,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-01-06 10:15:11,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2021-01-06 10:15:11,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2021-01-06 10:15:11,326 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 106 [2021-01-06 10:15:11,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:11,327 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2021-01-06 10:15:11,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:15:11,327 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2021-01-06 10:15:11,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-01-06 10:15:11,328 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:11,328 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 8, 8, 6, 6, 6, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:11,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:11,544 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:11,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:11,546 INFO L82 PathProgramCache]: Analyzing trace with hash -700509419, now seen corresponding path program 12 times [2021-01-06 10:15:11,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:11,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196683228] [2021-01-06 10:15:11,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:11,571 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:11,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1864156977] [2021-01-06 10:15:11,572 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 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 10:15:12,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 10:15:12,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:12,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:15:12,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:12,327 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-01-06 10:15:12,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196683228] [2021-01-06 10:15:12,328 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:12,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864156977] [2021-01-06 10:15:12,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:12,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:15:12,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801760889] [2021-01-06 10:15:12,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:15:12,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:12,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:15:12,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:15:12,331 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand 6 states. [2021-01-06 10:15:12,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:12,360 INFO L93 Difference]: Finished difference Result 150 states and 163 transitions. [2021-01-06 10:15:12,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:15:12,361 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 115 [2021-01-06 10:15:12,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:12,362 INFO L225 Difference]: With dead ends: 150 [2021-01-06 10:15:12,362 INFO L226 Difference]: Without dead ends: 119 [2021-01-06 10:15:12,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 110 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 10:15:12,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-01-06 10:15:12,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2021-01-06 10:15:12,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2021-01-06 10:15:12,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 128 transitions. [2021-01-06 10:15:12,372 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 128 transitions. Word has length 115 [2021-01-06 10:15:12,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:12,373 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 128 transitions. [2021-01-06 10:15:12,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:15:12,373 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 128 transitions. [2021-01-06 10:15:12,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-01-06 10:15:12,374 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:12,374 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 8, 8, 6, 6, 6, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:12,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 10:15:12,579 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:12,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:12,580 INFO L82 PathProgramCache]: Analyzing trace with hash -111816429, now seen corresponding path program 13 times [2021-01-06 10:15:12,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:12,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044944959] [2021-01-06 10:15:12,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:12,600 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:12,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [963397616] [2021-01-06 10:15:12,601 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 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 10:15:12,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:12,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:15:12,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:12,901 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-01-06 10:15:12,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044944959] [2021-01-06 10:15:12,901 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:12,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963397616] [2021-01-06 10:15:12,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:12,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 10:15:12,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536848150] [2021-01-06 10:15:12,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:15:12,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:12,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:15:12,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:15:12,905 INFO L87 Difference]: Start difference. First operand 118 states and 128 transitions. Second operand 11 states. [2021-01-06 10:15:13,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:13,121 INFO L93 Difference]: Finished difference Result 202 states and 227 transitions. [2021-01-06 10:15:13,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:15:13,122 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 117 [2021-01-06 10:15:13,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:13,123 INFO L225 Difference]: With dead ends: 202 [2021-01-06 10:15:13,123 INFO L226 Difference]: Without dead ends: 133 [2021-01-06 10:15:13,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 107 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 10:15:13,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-01-06 10:15:13,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 127. [2021-01-06 10:15:13,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2021-01-06 10:15:13,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 140 transitions. [2021-01-06 10:15:13,134 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 140 transitions. Word has length 117 [2021-01-06 10:15:13,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:13,134 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 140 transitions. [2021-01-06 10:15:13,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:15:13,135 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 140 transitions. [2021-01-06 10:15:13,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-01-06 10:15:13,136 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:13,136 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 6, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:13,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:13,350 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:13,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:13,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1649695946, now seen corresponding path program 14 times [2021-01-06 10:15:13,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:13,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596009902] [2021-01-06 10:15:13,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:13,370 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:13,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1273670398] [2021-01-06 10:15:13,371 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 10:15:13,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:15:13,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:13,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:15:13,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:13,678 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2021-01-06 10:15:13,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596009902] [2021-01-06 10:15:13,679 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:13,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273670398] [2021-01-06 10:15:13,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:13,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 10:15:13,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731221205] [2021-01-06 10:15:13,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 10:15:13,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:13,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 10:15:13,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:15:13,683 INFO L87 Difference]: Start difference. First operand 127 states and 140 transitions. Second operand 12 states. [2021-01-06 10:15:13,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:13,974 INFO L93 Difference]: Finished difference Result 211 states and 238 transitions. [2021-01-06 10:15:13,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:15:13,974 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 126 [2021-01-06 10:15:13,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:13,976 INFO L225 Difference]: With dead ends: 211 [2021-01-06 10:15:13,976 INFO L226 Difference]: Without dead ends: 136 [2021-01-06 10:15:13,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:15:13,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-01-06 10:15:13,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2021-01-06 10:15:13,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2021-01-06 10:15:13,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 152 transitions. [2021-01-06 10:15:13,988 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 152 transitions. Word has length 126 [2021-01-06 10:15:13,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:13,989 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 152 transitions. [2021-01-06 10:15:13,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 10:15:13,989 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 152 transitions. [2021-01-06 10:15:13,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-01-06 10:15:13,990 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:13,990 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:14,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 10:15:14,204 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:14,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:14,205 INFO L82 PathProgramCache]: Analyzing trace with hash -242787085, now seen corresponding path program 15 times [2021-01-06 10:15:14,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:14,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104258692] [2021-01-06 10:15:14,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:14,233 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:14,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2018016929] [2021-01-06 10:15:14,233 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 10:15:14,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 10:15:14,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:14,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:15:14,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:14,629 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-01-06 10:15:14,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104258692] [2021-01-06 10:15:14,630 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:14,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018016929] [2021-01-06 10:15:14,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:14,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:15:14,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340837139] [2021-01-06 10:15:14,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:15:14,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:14,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:15:14,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:15:14,632 INFO L87 Difference]: Start difference. First operand 136 states and 152 transitions. Second operand 7 states. [2021-01-06 10:15:14,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:14,667 INFO L93 Difference]: Finished difference Result 176 states and 197 transitions. [2021-01-06 10:15:14,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:15:14,668 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 135 [2021-01-06 10:15:14,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:14,669 INFO L225 Difference]: With dead ends: 176 [2021-01-06 10:15:14,669 INFO L226 Difference]: Without dead ends: 139 [2021-01-06 10:15:14,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 129 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 10:15:14,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-01-06 10:15:14,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2021-01-06 10:15:14,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2021-01-06 10:15:14,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 154 transitions. [2021-01-06 10:15:14,680 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 154 transitions. Word has length 135 [2021-01-06 10:15:14,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:14,680 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 154 transitions. [2021-01-06 10:15:14,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:15:14,681 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 154 transitions. [2021-01-06 10:15:14,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-01-06 10:15:14,682 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:14,682 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:14,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 10:15:14,898 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:14,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:14,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1975493873, now seen corresponding path program 16 times [2021-01-06 10:15:14,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:14,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070399393] [2021-01-06 10:15:14,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:14,921 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:14,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1040032325] [2021-01-06 10:15:14,921 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 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 10:15:15,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:15:15,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:15,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:15:15,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:15,307 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-01-06 10:15:15,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070399393] [2021-01-06 10:15:15,308 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:15,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040032325] [2021-01-06 10:15:15,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:15,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:15:15,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566154916] [2021-01-06 10:15:15,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:15:15,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:15,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:15:15,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:15:15,311 INFO L87 Difference]: Start difference. First operand 138 states and 154 transitions. Second operand 8 states. [2021-01-06 10:15:15,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:15,352 INFO L93 Difference]: Finished difference Result 178 states and 199 transitions. [2021-01-06 10:15:15,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:15:15,353 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 137 [2021-01-06 10:15:15,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:15,355 INFO L225 Difference]: With dead ends: 178 [2021-01-06 10:15:15,355 INFO L226 Difference]: Without dead ends: 141 [2021-01-06 10:15:15,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 130 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 10:15:15,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-01-06 10:15:15,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2021-01-06 10:15:15,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2021-01-06 10:15:15,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 156 transitions. [2021-01-06 10:15:15,366 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 156 transitions. Word has length 137 [2021-01-06 10:15:15,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:15,367 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 156 transitions. [2021-01-06 10:15:15,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:15:15,367 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 156 transitions. [2021-01-06 10:15:15,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-01-06 10:15:15,369 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:15,369 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:15,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 10:15:15,583 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:15,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:15,584 INFO L82 PathProgramCache]: Analyzing trace with hash -855251601, now seen corresponding path program 17 times [2021-01-06 10:15:15,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:15,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757702019] [2021-01-06 10:15:15,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:15,604 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:15,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [74401567] [2021-01-06 10:15:15,605 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 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 10:15:16,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-01-06 10:15:16,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:16,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:15:16,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:16,615 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-01-06 10:15:16,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757702019] [2021-01-06 10:15:16,615 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:16,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74401567] [2021-01-06 10:15:16,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:16,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 10:15:16,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207573914] [2021-01-06 10:15:16,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:15:16,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:16,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:15:16,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:15:16,618 INFO L87 Difference]: Start difference. First operand 140 states and 156 transitions. Second operand 9 states. [2021-01-06 10:15:16,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:16,667 INFO L93 Difference]: Finished difference Result 180 states and 201 transitions. [2021-01-06 10:15:16,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:15:16,667 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 139 [2021-01-06 10:15:16,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:16,669 INFO L225 Difference]: With dead ends: 180 [2021-01-06 10:15:16,669 INFO L226 Difference]: Without dead ends: 143 [2021-01-06 10:15:16,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 131 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 10:15:16,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-01-06 10:15:16,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2021-01-06 10:15:16,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2021-01-06 10:15:16,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 158 transitions. [2021-01-06 10:15:16,681 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 158 transitions. Word has length 139 [2021-01-06 10:15:16,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:16,682 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 158 transitions. [2021-01-06 10:15:16,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:15:16,682 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 158 transitions. [2021-01-06 10:15:16,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-01-06 10:15:16,684 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:16,684 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 7, 7, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:16,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:16,899 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:16,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:16,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1807613549, now seen corresponding path program 18 times [2021-01-06 10:15:16,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:16,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359625696] [2021-01-06 10:15:16,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:16,917 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:16,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1855049124] [2021-01-06 10:15:16,918 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 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