/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/rangesum40.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:15:07,176 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:15:07,180 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:15:07,242 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:15:07,243 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:15:07,250 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:15:07,254 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:15:07,261 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:15:07,267 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:15:07,274 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:15:07,280 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:15:07,282 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:15:07,283 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:15:07,288 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:15:07,290 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:15:07,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:15:07,296 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:15:07,314 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:15:07,322 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:15:07,330 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:15:07,335 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:15:07,340 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:15:07,343 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:15:07,346 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:15:07,356 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:15:07,382 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:15:07,383 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:15:07,385 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:15:07,386 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 10:15:07,455 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:15:07,456 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:15:07,463 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:15:07,464 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:15:07,464 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:15:07,464 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:15:07,465 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:15:07,465 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:15:07,465 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:15:07,465 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:15:07,467 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:15:07,468 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:15:07,469 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:15:07,469 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:15:07,469 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:15:07,470 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:15:07,470 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:15:07,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:15:07,470 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:15:07,471 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:15:07,471 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:15:07,471 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:15:07,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:15:07,472 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:15:07,472 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:15:07,472 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:15:08,033 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:15:08,079 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:15:08,084 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:15:08,086 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:15:08,088 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:15:08,089 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/rangesum40.i [2021-01-06 10:15:08,200 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c2abdcd12/998a65d65b2449d593a22466122a8677/FLAGca829afeb [2021-01-06 10:15:09,121 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:15:09,121 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum40.i [2021-01-06 10:15:09,141 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c2abdcd12/998a65d65b2449d593a22466122a8677/FLAGca829afeb [2021-01-06 10:15:09,383 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c2abdcd12/998a65d65b2449d593a22466122a8677 [2021-01-06 10:15:09,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:15:09,392 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:15:09,398 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:15:09,399 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:15:09,406 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:15:09,408 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:15:09" (1/1) ... [2021-01-06 10:15:09,411 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29adee0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:09, skipping insertion in model container [2021-01-06 10:15:09,412 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:15:09" (1/1) ... [2021-01-06 10:15:09,428 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:15:09,460 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[39]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2021-01-06 10:15:09,666 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/rangesum40.i[1465,1478] [2021-01-06 10:15:09,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:15:09,685 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[156],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2021-01-06 10:15:09,723 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/rangesum40.i[1465,1478] [2021-01-06 10:15:09,725 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:15:09,750 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:15:09,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:09 WrapperNode [2021-01-06 10:15:09,751 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:15:09,753 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:15:09,753 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:15:09,753 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:15:09,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:09" (1/1) ... [2021-01-06 10:15:09,779 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:09" (1/1) ... [2021-01-06 10:15:09,842 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:15:09,847 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:15:09,847 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:15:09,847 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:15:09,863 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:09" (1/1) ... [2021-01-06 10:15:09,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:09" (1/1) ... [2021-01-06 10:15:09,867 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:09" (1/1) ... [2021-01-06 10:15:09,868 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:09" (1/1) ... [2021-01-06 10:15:09,878 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:09" (1/1) ... [2021-01-06 10:15:09,885 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:09" (1/1) ... [2021-01-06 10:15:09,888 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:09" (1/1) ... [2021-01-06 10:15:09,893 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:15:09,894 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:15:09,895 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:15:09,895 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:15:09,896 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:09" (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 10:15:10,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:15:10,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:15:10,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:15:10,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:15:10,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:15:10,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:15:10,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:15:10,712 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:15:10,712 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-01-06 10:15:10,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:15:10 BoogieIcfgContainer [2021-01-06 10:15:10,719 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:15:10,723 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:15:10,723 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:15:10,728 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:15:10,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:15:09" (1/3) ... [2021-01-06 10:15:10,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3896b6de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:15:10, skipping insertion in model container [2021-01-06 10:15:10,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:15:09" (2/3) ... [2021-01-06 10:15:10,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3896b6de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:15:10, skipping insertion in model container [2021-01-06 10:15:10,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:15:10" (3/3) ... [2021-01-06 10:15:10,733 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum40.i [2021-01-06 10:15:10,741 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:15:10,747 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:15:10,769 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:15:10,816 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:15:10,818 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:15:10,818 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:15:10,818 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:15:10,819 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:15:10,819 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:15:10,819 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:15:10,819 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:15:10,847 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2021-01-06 10:15:10,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 10:15:10,858 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:10,859 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 10:15:10,859 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:10,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:10,867 INFO L82 PathProgramCache]: Analyzing trace with hash -919167012, now seen corresponding path program 1 times [2021-01-06 10:15:10,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:10,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305759900] [2021-01-06 10:15:10,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:11,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:11,168 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 10:15:11,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305759900] [2021-01-06 10:15:11,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:15:11,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:15:11,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642092823] [2021-01-06 10:15:11,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:15:11,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:11,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:15:11,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:15:11,209 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2021-01-06 10:15:11,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:11,232 INFO L93 Difference]: Finished difference Result 56 states and 86 transitions. [2021-01-06 10:15:11,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:15:11,234 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2021-01-06 10:15:11,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:11,248 INFO L225 Difference]: With dead ends: 56 [2021-01-06 10:15:11,249 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 10:15:11,254 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 10:15:11,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 10:15:11,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-01-06 10:15:11,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 10:15:11,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2021-01-06 10:15:11,317 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 17 [2021-01-06 10:15:11,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:11,318 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2021-01-06 10:15:11,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:15:11,319 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2021-01-06 10:15:11,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 10:15:11,323 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:11,323 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 10:15:11,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:15:11,326 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:11,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:11,329 INFO L82 PathProgramCache]: Analyzing trace with hash 164788593, now seen corresponding path program 1 times [2021-01-06 10:15:11,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:11,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079796900] [2021-01-06 10:15:11,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:11,375 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:11,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [591943967] [2021-01-06 10:15:11,380 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 10:15:11,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:11,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 10:15:11,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:11,550 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 10:15:11,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079796900] [2021-01-06 10:15:11,554 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:11,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591943967] [2021-01-06 10:15:11,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:15:11,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:15:11,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309423529] [2021-01-06 10:15:11,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:15:11,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:11,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:15:11,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:15:11,563 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 3 states. [2021-01-06 10:15:11,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:11,616 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2021-01-06 10:15:11,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:15:11,618 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2021-01-06 10:15:11,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:11,619 INFO L225 Difference]: With dead ends: 50 [2021-01-06 10:15:11,620 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 10:15:11,624 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 10:15:11,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 10:15:11,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-01-06 10:15:11,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 10:15:11,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-01-06 10:15:11,641 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 17 [2021-01-06 10:15:11,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:11,642 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-01-06 10:15:11,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:15:11,643 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-01-06 10:15:11,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 10:15:11,644 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:11,644 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 10:15:11,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 10:15:11,854 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:11,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:11,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1403287377, now seen corresponding path program 1 times [2021-01-06 10:15:11,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:11,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471020751] [2021-01-06 10:15:11,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:11,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:12,039 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 10:15:12,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471020751] [2021-01-06 10:15:12,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509767207] [2021-01-06 10:15:12,041 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 10:15:12,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:12,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 10:15:12,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:12,192 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 10:15:12,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:12,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 10:15:12,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899635468] [2021-01-06 10:15:12,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:15:12,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:12,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:15:12,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:15:12,198 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 3 states. [2021-01-06 10:15:12,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:12,277 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2021-01-06 10:15:12,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:15:12,278 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2021-01-06 10:15:12,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:12,279 INFO L225 Difference]: With dead ends: 57 [2021-01-06 10:15:12,279 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 10:15:12,280 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 10:15:12,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 10:15:12,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-01-06 10:15:12,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 10:15:12,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-01-06 10:15:12,289 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2021-01-06 10:15:12,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:12,289 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-01-06 10:15:12,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:15:12,290 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-01-06 10:15:12,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 10:15:12,291 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:12,291 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 10:15:12,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:12,506 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:12,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:12,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1132417868, now seen corresponding path program 1 times [2021-01-06 10:15:12,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:12,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425662447] [2021-01-06 10:15:12,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:12,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:12,566 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 10:15:12,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425662447] [2021-01-06 10:15:12,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955945059] [2021-01-06 10:15:12,568 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 10:15:12,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:12,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 10:15:12,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:12,724 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 10:15:12,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:12,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 10:15:12,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490446138] [2021-01-06 10:15:12,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:15:12,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:12,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:15:12,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:15:12,732 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand 3 states. [2021-01-06 10:15:12,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:12,773 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2021-01-06 10:15:12,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:15:12,776 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2021-01-06 10:15:12,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:12,777 INFO L225 Difference]: With dead ends: 46 [2021-01-06 10:15:12,777 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 10:15:12,779 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 10:15:12,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 10:15:12,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-01-06 10:15:12,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 10:15:12,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2021-01-06 10:15:12,796 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 28 [2021-01-06 10:15:12,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:12,796 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2021-01-06 10:15:12,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:15:12,796 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2021-01-06 10:15:12,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 10:15:12,798 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:12,798 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 10:15:13,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:13,008 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:13,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:13,010 INFO L82 PathProgramCache]: Analyzing trace with hash 513768630, now seen corresponding path program 1 times [2021-01-06 10:15:13,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:13,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950016907] [2021-01-06 10:15:13,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:13,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:13,060 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 10:15:13,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950016907] [2021-01-06 10:15:13,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241352097] [2021-01-06 10:15:13,062 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 10:15:13,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:13,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:15:13,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:13,201 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 10:15:13,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:13,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 10:15:13,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981305057] [2021-01-06 10:15:13,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:15:13,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:13,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:15:13,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:15:13,205 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand 3 states. [2021-01-06 10:15:13,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:13,260 INFO L93 Difference]: Finished difference Result 78 states and 103 transitions. [2021-01-06 10:15:13,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:15:13,261 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2021-01-06 10:15:13,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:13,263 INFO L225 Difference]: With dead ends: 78 [2021-01-06 10:15:13,263 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 10:15:13,264 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 10:15:13,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 10:15:13,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2021-01-06 10:15:13,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 10:15:13,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2021-01-06 10:15:13,274 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 30 [2021-01-06 10:15:13,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:13,275 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2021-01-06 10:15:13,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:15:13,275 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2021-01-06 10:15:13,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 10:15:13,276 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:13,276 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 10:15:13,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:13,492 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:13,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:13,493 INFO L82 PathProgramCache]: Analyzing trace with hash -303820238, now seen corresponding path program 1 times [2021-01-06 10:15:13,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:13,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456910084] [2021-01-06 10:15:13,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:13,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:13,582 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 10:15:13,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456910084] [2021-01-06 10:15:13,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000746894] [2021-01-06 10:15:13,584 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 10:15:13,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:13,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:15:13,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:13,766 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 10:15:13,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:15:13,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 10:15:13,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579145334] [2021-01-06 10:15:13,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:15:13,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:13,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:15:13,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:15:13,770 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand 5 states. [2021-01-06 10:15:13,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:13,806 INFO L93 Difference]: Finished difference Result 90 states and 122 transitions. [2021-01-06 10:15:13,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:15:13,806 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2021-01-06 10:15:13,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:13,807 INFO L225 Difference]: With dead ends: 90 [2021-01-06 10:15:13,808 INFO L226 Difference]: Without dead ends: 49 [2021-01-06 10:15:13,809 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 10:15:13,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-01-06 10:15:13,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-01-06 10:15:13,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 10:15:13,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2021-01-06 10:15:13,816 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 30 [2021-01-06 10:15:13,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:13,817 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2021-01-06 10:15:13,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:15:13,817 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2021-01-06 10:15:13,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 10:15:13,818 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:13,818 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 10:15:14,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 10:15:14,033 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:14,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:14,035 INFO L82 PathProgramCache]: Analyzing trace with hash 612513716, now seen corresponding path program 2 times [2021-01-06 10:15:14,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:14,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689665509] [2021-01-06 10:15:14,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:14,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:14,091 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 10:15:14,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689665509] [2021-01-06 10:15:14,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56213114] [2021-01-06 10:15:14,093 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 10:15:14,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-01-06 10:15:14,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:14,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:15:14,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:14,376 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 10:15:14,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:14,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2021-01-06 10:15:14,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425102153] [2021-01-06 10:15:14,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:15:14,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:14,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:15:14,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:15:14,381 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand 8 states. [2021-01-06 10:15:14,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:14,488 INFO L93 Difference]: Finished difference Result 114 states and 143 transitions. [2021-01-06 10:15:14,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:15:14,488 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2021-01-06 10:15:14,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:14,490 INFO L225 Difference]: With dead ends: 114 [2021-01-06 10:15:14,490 INFO L226 Difference]: Without dead ends: 109 [2021-01-06 10:15:14,491 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 10:15:14,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-01-06 10:15:14,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2021-01-06 10:15:14,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 10:15:14,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 98 transitions. [2021-01-06 10:15:14,504 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 98 transitions. Word has length 32 [2021-01-06 10:15:14,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:14,505 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 98 transitions. [2021-01-06 10:15:14,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:15:14,505 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 98 transitions. [2021-01-06 10:15:14,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 10:15:14,507 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:14,507 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 10:15:14,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:14,721 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:14,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:14,723 INFO L82 PathProgramCache]: Analyzing trace with hash -582685651, now seen corresponding path program 1 times [2021-01-06 10:15:14,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:14,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120947977] [2021-01-06 10:15:14,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:14,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:14,776 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 10:15:14,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120947977] [2021-01-06 10:15:14,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184542803] [2021-01-06 10:15:14,778 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 10:15:14,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:14,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:15:14,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:14,944 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 10:15:14,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:15:14,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-01-06 10:15:14,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697679722] [2021-01-06 10:15:14,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:15:14,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:14,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:15:14,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:15:14,948 INFO L87 Difference]: Start difference. First operand 73 states and 98 transitions. Second operand 7 states. [2021-01-06 10:15:15,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:15,098 INFO L93 Difference]: Finished difference Result 162 states and 221 transitions. [2021-01-06 10:15:15,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:15:15,099 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2021-01-06 10:15:15,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:15,102 INFO L225 Difference]: With dead ends: 162 [2021-01-06 10:15:15,103 INFO L226 Difference]: Without dead ends: 96 [2021-01-06 10:15:15,104 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 10:15:15,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-01-06 10:15:15,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2021-01-06 10:15:15,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2021-01-06 10:15:15,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 115 transitions. [2021-01-06 10:15:15,120 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 115 transitions. Word has length 35 [2021-01-06 10:15:15,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:15,120 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 115 transitions. [2021-01-06 10:15:15,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:15:15,121 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 115 transitions. [2021-01-06 10:15:15,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 10:15:15,122 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:15,123 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 10:15:15,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:15,337 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:15,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:15,338 INFO L82 PathProgramCache]: Analyzing trace with hash 2109979210, now seen corresponding path program 2 times [2021-01-06 10:15:15,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:15,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222746645] [2021-01-06 10:15:15,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:15,365 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:15,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [947878427] [2021-01-06 10:15:15,366 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 10:15:15,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:15:15,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:15,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:15:15,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:15,544 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 10:15:15,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222746645] [2021-01-06 10:15:15,545 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:15,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947878427] [2021-01-06 10:15:15,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:15,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:15:15,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336824009] [2021-01-06 10:15:15,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:15:15,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:15,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:15:15,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:15:15,548 INFO L87 Difference]: Start difference. First operand 90 states and 115 transitions. Second operand 6 states. [2021-01-06 10:15:15,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:15,578 INFO L93 Difference]: Finished difference Result 174 states and 224 transitions. [2021-01-06 10:15:15,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:15:15,578 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2021-01-06 10:15:15,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:15,579 INFO L225 Difference]: With dead ends: 174 [2021-01-06 10:15:15,580 INFO L226 Difference]: Without dead ends: 93 [2021-01-06 10:15:15,581 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 10:15:15,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-01-06 10:15:15,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-01-06 10:15:15,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2021-01-06 10:15:15,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 117 transitions. [2021-01-06 10:15:15,591 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 117 transitions. Word has length 46 [2021-01-06 10:15:15,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:15,591 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 117 transitions. [2021-01-06 10:15:15,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:15:15,592 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 117 transitions. [2021-01-06 10:15:15,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-06 10:15:15,593 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:15,593 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 10:15:15,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 10:15:15,809 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:15,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:15,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1002085324, now seen corresponding path program 3 times [2021-01-06 10:15:15,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:15,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758800902] [2021-01-06 10:15:15,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:15,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:15,877 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 10:15:15,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758800902] [2021-01-06 10:15:15,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:15:15,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:15:15,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716638235] [2021-01-06 10:15:15,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:15:15,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:15,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:15:15,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:15:15,880 INFO L87 Difference]: Start difference. First operand 92 states and 117 transitions. Second operand 4 states. [2021-01-06 10:15:15,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:15,995 INFO L93 Difference]: Finished difference Result 177 states and 232 transitions. [2021-01-06 10:15:15,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:15:15,996 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2021-01-06 10:15:15,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:15,997 INFO L225 Difference]: With dead ends: 177 [2021-01-06 10:15:15,998 INFO L226 Difference]: Without dead ends: 108 [2021-01-06 10:15:16,000 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 10:15:16,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-01-06 10:15:16,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 83. [2021-01-06 10:15:16,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-01-06 10:15:16,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2021-01-06 10:15:16,025 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 48 [2021-01-06 10:15:16,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:16,025 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2021-01-06 10:15:16,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:15:16,025 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2021-01-06 10:15:16,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-01-06 10:15:16,030 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:16,030 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 10:15:16,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-01-06 10:15:16,031 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:16,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:16,032 INFO L82 PathProgramCache]: Analyzing trace with hash 238121238, now seen corresponding path program 1 times [2021-01-06 10:15:16,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:16,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112923023] [2021-01-06 10:15:16,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:16,065 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:16,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1599057071] [2021-01-06 10:15:16,067 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 10:15:16,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:16,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:15:16,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:16,339 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 10:15:16,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112923023] [2021-01-06 10:15:16,340 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:16,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599057071] [2021-01-06 10:15:16,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:16,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:15:16,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221139186] [2021-01-06 10:15:16,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:15:16,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:16,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:15:16,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:15:16,347 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand 7 states. [2021-01-06 10:15:16,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:16,393 INFO L93 Difference]: Finished difference Result 158 states and 190 transitions. [2021-01-06 10:15:16,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:15:16,396 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2021-01-06 10:15:16,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:16,397 INFO L225 Difference]: With dead ends: 158 [2021-01-06 10:15:16,397 INFO L226 Difference]: Without dead ends: 86 [2021-01-06 10:15:16,401 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 10:15:16,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-01-06 10:15:16,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-01-06 10:15:16,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 10:15:16,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 101 transitions. [2021-01-06 10:15:16,415 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 101 transitions. Word has length 54 [2021-01-06 10:15:16,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:16,418 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 101 transitions. [2021-01-06 10:15:16,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:15:16,419 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 101 transitions. [2021-01-06 10:15:16,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 10:15:16,423 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:16,423 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 10:15:16,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:16,638 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:16,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:16,640 INFO L82 PathProgramCache]: Analyzing trace with hash -428363624, now seen corresponding path program 2 times [2021-01-06 10:15:16,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:16,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158545563] [2021-01-06 10:15:16,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:16,659 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:16,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2129489626] [2021-01-06 10:15:16,660 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 10:15:16,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:15:16,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:16,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:15:16,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:16,940 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 10:15:16,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158545563] [2021-01-06 10:15:16,941 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:16,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129489626] [2021-01-06 10:15:16,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:16,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:15:16,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846838284] [2021-01-06 10:15:16,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:15:16,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:16,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:15:16,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:15:16,945 INFO L87 Difference]: Start difference. First operand 85 states and 101 transitions. Second operand 8 states. [2021-01-06 10:15:16,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:16,988 INFO L93 Difference]: Finished difference Result 160 states and 192 transitions. [2021-01-06 10:15:16,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:15:16,989 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2021-01-06 10:15:16,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:16,990 INFO L225 Difference]: With dead ends: 160 [2021-01-06 10:15:16,990 INFO L226 Difference]: Without dead ends: 88 [2021-01-06 10:15:16,996 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 10:15:16,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-01-06 10:15:17,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-01-06 10:15:17,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-01-06 10:15:17,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2021-01-06 10:15:17,010 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 56 [2021-01-06 10:15:17,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:17,011 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2021-01-06 10:15:17,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:15:17,011 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2021-01-06 10:15:17,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 10:15:17,013 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:17,013 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 10:15:17,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:17,227 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:17,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:17,228 INFO L82 PathProgramCache]: Analyzing trace with hash -970188902, now seen corresponding path program 3 times [2021-01-06 10:15:17,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:17,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146413458] [2021-01-06 10:15:17,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:17,246 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:17,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [163066852] [2021-01-06 10:15:17,247 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 10:15:17,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:15:17,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:17,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:15:17,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:17,484 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 10:15:17,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146413458] [2021-01-06 10:15:17,485 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:17,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163066852] [2021-01-06 10:15:17,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:15:17,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:15:17,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294279504] [2021-01-06 10:15:17,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:15:17,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:17,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:15:17,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:15:17,499 INFO L87 Difference]: Start difference. First operand 87 states and 103 transitions. Second operand 4 states. [2021-01-06 10:15:17,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:17,550 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2021-01-06 10:15:17,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:15:17,551 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2021-01-06 10:15:17,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:17,552 INFO L225 Difference]: With dead ends: 116 [2021-01-06 10:15:17,552 INFO L226 Difference]: Without dead ends: 68 [2021-01-06 10:15:17,553 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 10:15:17,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-01-06 10:15:17,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2021-01-06 10:15:17,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 10:15:17,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2021-01-06 10:15:17,559 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 58 [2021-01-06 10:15:17,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:17,559 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2021-01-06 10:15:17,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:15:17,559 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2021-01-06 10:15:17,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 10:15:17,561 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:17,561 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 10:15:17,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:15:17,775 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:17,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:17,776 INFO L82 PathProgramCache]: Analyzing trace with hash -152540452, now seen corresponding path program 1 times [2021-01-06 10:15:17,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:17,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774006613] [2021-01-06 10:15:17,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:17,807 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:17,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [490505283] [2021-01-06 10:15:17,810 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 10:15:17,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:17,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:15:17,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:18,025 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 10:15:18,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774006613] [2021-01-06 10:15:18,026 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:18,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490505283] [2021-01-06 10:15:18,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:18,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 10:15:18,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561239803] [2021-01-06 10:15:18,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:15:18,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:18,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:15:18,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:15:18,028 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 9 states. [2021-01-06 10:15:18,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:18,068 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2021-01-06 10:15:18,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:15:18,069 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2021-01-06 10:15:18,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:18,070 INFO L225 Difference]: With dead ends: 106 [2021-01-06 10:15:18,070 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 10:15:18,071 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 10:15:18,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 10:15:18,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-01-06 10:15:18,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-01-06 10:15:18,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2021-01-06 10:15:18,076 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 58 [2021-01-06 10:15:18,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:18,076 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2021-01-06 10:15:18,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:15:18,077 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2021-01-06 10:15:18,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-01-06 10:15:18,077 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:18,078 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 10:15:18,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 10:15:18,291 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:18,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:18,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1155589794, now seen corresponding path program 2 times [2021-01-06 10:15:18,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:18,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682198244] [2021-01-06 10:15:18,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:18,344 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:18,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [500442601] [2021-01-06 10:15:18,345 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 10:15:18,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:15:18,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:18,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:15:18,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:18,641 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 10:15:18,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682198244] [2021-01-06 10:15:18,642 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:18,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500442601] [2021-01-06 10:15:18,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:18,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 10:15:18,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866018740] [2021-01-06 10:15:18,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:15:18,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:18,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:15:18,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:15:18,645 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 10 states. [2021-01-06 10:15:18,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:18,695 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2021-01-06 10:15:18,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:15:18,696 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2021-01-06 10:15:18,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:18,697 INFO L225 Difference]: With dead ends: 108 [2021-01-06 10:15:18,697 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 10:15:18,698 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 10:15:18,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 10:15:18,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-01-06 10:15:18,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 10:15:18,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2021-01-06 10:15:18,703 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 60 [2021-01-06 10:15:18,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:18,703 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2021-01-06 10:15:18,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:15:18,704 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2021-01-06 10:15:18,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-01-06 10:15:18,704 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:18,704 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 10:15:18,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 10:15:18,913 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:18,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:18,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1281634144, now seen corresponding path program 3 times [2021-01-06 10:15:18,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:18,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248339252] [2021-01-06 10:15:18,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:18,936 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:18,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1901235306] [2021-01-06 10:15:18,936 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 10:15:19,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:15:19,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:19,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:15:19,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:19,146 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 10:15:19,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248339252] [2021-01-06 10:15:19,147 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:19,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901235306] [2021-01-06 10:15:19,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:19,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-01-06 10:15:19,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979186048] [2021-01-06 10:15:19,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:15:19,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:19,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:15:19,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:15:19,158 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand 4 states. [2021-01-06 10:15:19,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:19,182 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2021-01-06 10:15:19,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:15:19,183 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2021-01-06 10:15:19,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:19,184 INFO L225 Difference]: With dead ends: 82 [2021-01-06 10:15:19,184 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 10:15:19,184 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 10:15:19,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 10:15:19,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-01-06 10:15:19,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-01-06 10:15:19,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2021-01-06 10:15:19,190 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 62 [2021-01-06 10:15:19,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:19,190 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2021-01-06 10:15:19,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:15:19,190 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2021-01-06 10:15:19,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-01-06 10:15:19,191 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:19,192 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 10:15:19,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:19,405 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:19,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:19,406 INFO L82 PathProgramCache]: Analyzing trace with hash 377274978, now seen corresponding path program 4 times [2021-01-06 10:15:19,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:19,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485422866] [2021-01-06 10:15:19,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:19,446 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:19,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [60088136] [2021-01-06 10:15:19,446 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 10:15:19,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:15:19,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:19,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:15:19,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:19,650 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 10:15:19,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485422866] [2021-01-06 10:15:19,651 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:19,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60088136] [2021-01-06 10:15:19,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:19,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 10:15:19,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648521887] [2021-01-06 10:15:19,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:15:19,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:19,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:15:19,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:15:19,653 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 5 states. [2021-01-06 10:15:19,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:19,749 INFO L93 Difference]: Finished difference Result 117 states and 133 transitions. [2021-01-06 10:15:19,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:15:19,750 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2021-01-06 10:15:19,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:19,751 INFO L225 Difference]: With dead ends: 117 [2021-01-06 10:15:19,751 INFO L226 Difference]: Without dead ends: 77 [2021-01-06 10:15:19,752 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 10:15:19,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-01-06 10:15:19,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2021-01-06 10:15:19,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-01-06 10:15:19,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2021-01-06 10:15:19,758 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 64 [2021-01-06 10:15:19,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:19,758 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2021-01-06 10:15:19,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:15:19,759 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2021-01-06 10:15:19,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-01-06 10:15:19,759 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:19,760 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 10:15:19,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 10:15:19,975 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:19,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:19,976 INFO L82 PathProgramCache]: Analyzing trace with hash -790114983, now seen corresponding path program 5 times [2021-01-06 10:15:19,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:19,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539676132] [2021-01-06 10:15:19,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:20,020 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:20,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [770432796] [2021-01-06 10:15:20,025 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 10:15:20,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-06 10:15:20,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:20,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:15:20,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:20,283 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 10:15:20,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539676132] [2021-01-06 10:15:20,284 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:20,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770432796] [2021-01-06 10:15:20,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:20,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:15:20,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583031445] [2021-01-06 10:15:20,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:15:20,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:20,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:15:20,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:15:20,286 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand 6 states. [2021-01-06 10:15:20,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:20,426 INFO L93 Difference]: Finished difference Result 132 states and 148 transitions. [2021-01-06 10:15:20,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:15:20,427 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2021-01-06 10:15:20,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:20,428 INFO L225 Difference]: With dead ends: 132 [2021-01-06 10:15:20,428 INFO L226 Difference]: Without dead ends: 86 [2021-01-06 10:15:20,429 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 10:15:20,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-01-06 10:15:20,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2021-01-06 10:15:20,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-01-06 10:15:20,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2021-01-06 10:15:20,437 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 73 [2021-01-06 10:15:20,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:20,437 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2021-01-06 10:15:20,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:15:20,437 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2021-01-06 10:15:20,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-01-06 10:15:20,439 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:20,439 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 10:15:20,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 10:15:20,653 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:20,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:20,654 INFO L82 PathProgramCache]: Analyzing trace with hash 426299330, now seen corresponding path program 6 times [2021-01-06 10:15:20,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:20,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119046753] [2021-01-06 10:15:20,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:20,671 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:20,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [792641651] [2021-01-06 10:15:20,672 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 10:15:21,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 10:15:21,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:21,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:15:21,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:21,206 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 10:15:21,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119046753] [2021-01-06 10:15:21,207 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:21,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792641651] [2021-01-06 10:15:21,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:21,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 10:15:21,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663888573] [2021-01-06 10:15:21,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:15:21,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:21,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:15:21,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:15:21,215 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand 5 states. [2021-01-06 10:15:21,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:21,238 INFO L93 Difference]: Finished difference Result 108 states and 117 transitions. [2021-01-06 10:15:21,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:15:21,239 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 82 [2021-01-06 10:15:21,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:21,240 INFO L225 Difference]: With dead ends: 108 [2021-01-06 10:15:21,240 INFO L226 Difference]: Without dead ends: 86 [2021-01-06 10:15:21,241 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 10:15:21,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-01-06 10:15:21,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-01-06 10:15:21,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 10:15:21,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2021-01-06 10:15:21,246 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 82 [2021-01-06 10:15:21,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:21,247 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2021-01-06 10:15:21,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:15:21,247 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2021-01-06 10:15:21,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-01-06 10:15:21,248 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:21,248 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 10:15:21,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:21,459 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:21,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:21,460 INFO L82 PathProgramCache]: Analyzing trace with hash -105690940, now seen corresponding path program 7 times [2021-01-06 10:15:21,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:21,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163728098] [2021-01-06 10:15:21,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:21,479 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:21,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1987192425] [2021-01-06 10:15:21,480 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 10:15:21,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:21,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:15:21,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:21,726 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 10:15:21,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163728098] [2021-01-06 10:15:21,726 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:21,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987192425] [2021-01-06 10:15:21,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:21,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 10:15:21,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417659035] [2021-01-06 10:15:21,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:15:21,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:21,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:15:21,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:15:21,729 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand 11 states. [2021-01-06 10:15:21,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:21,780 INFO L93 Difference]: Finished difference Result 154 states and 168 transitions. [2021-01-06 10:15:21,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:15:21,781 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 84 [2021-01-06 10:15:21,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:21,782 INFO L225 Difference]: With dead ends: 154 [2021-01-06 10:15:21,782 INFO L226 Difference]: Without dead ends: 88 [2021-01-06 10:15:21,783 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 10:15:21,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-01-06 10:15:21,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-01-06 10:15:21,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-01-06 10:15:21,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 94 transitions. [2021-01-06 10:15:21,804 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 94 transitions. Word has length 84 [2021-01-06 10:15:21,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:21,805 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 94 transitions. [2021-01-06 10:15:21,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:15:21,805 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 94 transitions. [2021-01-06 10:15:21,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-06 10:15:21,809 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:21,809 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 10:15:22,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:22,024 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:22,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:22,025 INFO L82 PathProgramCache]: Analyzing trace with hash 2063005894, now seen corresponding path program 8 times [2021-01-06 10:15:22,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:22,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635359841] [2021-01-06 10:15:22,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:22,048 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:22,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1904537445] [2021-01-06 10:15:22,049 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 10:15:22,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:15:22,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:22,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:15:22,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:22,348 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 10:15:22,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635359841] [2021-01-06 10:15:22,350 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:22,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904537445] [2021-01-06 10:15:22,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:22,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 10:15:22,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134364408] [2021-01-06 10:15:22,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 10:15:22,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:22,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 10:15:22,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:15:22,353 INFO L87 Difference]: Start difference. First operand 87 states and 94 transitions. Second operand 12 states. [2021-01-06 10:15:22,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:22,413 INFO L93 Difference]: Finished difference Result 156 states and 170 transitions. [2021-01-06 10:15:22,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:15:22,414 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 86 [2021-01-06 10:15:22,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:22,415 INFO L225 Difference]: With dead ends: 156 [2021-01-06 10:15:22,415 INFO L226 Difference]: Without dead ends: 90 [2021-01-06 10:15:22,416 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 10:15:22,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-01-06 10:15:22,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-01-06 10:15:22,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2021-01-06 10:15:22,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 96 transitions. [2021-01-06 10:15:22,432 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 96 transitions. Word has length 86 [2021-01-06 10:15:22,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:22,433 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 96 transitions. [2021-01-06 10:15:22,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 10:15:22,433 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 96 transitions. [2021-01-06 10:15:22,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-01-06 10:15:22,434 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:22,434 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 10:15:22,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:22,649 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:22,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:22,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1173442488, now seen corresponding path program 9 times [2021-01-06 10:15:22,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:22,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542417160] [2021-01-06 10:15:22,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:22,666 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:22,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [901575688] [2021-01-06 10:15:22,667 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 10:15:23,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:15:23,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:23,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:15:23,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:23,217 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 10:15:23,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542417160] [2021-01-06 10:15:23,218 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:23,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901575688] [2021-01-06 10:15:23,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:23,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 10:15:23,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428251215] [2021-01-06 10:15:23,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:15:23,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:23,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:15:23,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:15:23,220 INFO L87 Difference]: Start difference. First operand 89 states and 96 transitions. Second operand 5 states. [2021-01-06 10:15:23,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:23,339 INFO L93 Difference]: Finished difference Result 153 states and 173 transitions. [2021-01-06 10:15:23,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:15:23,340 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 88 [2021-01-06 10:15:23,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:23,341 INFO L225 Difference]: With dead ends: 153 [2021-01-06 10:15:23,341 INFO L226 Difference]: Without dead ends: 104 [2021-01-06 10:15:23,342 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 10:15:23,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-01-06 10:15:23,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2021-01-06 10:15:23,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-01-06 10:15:23,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2021-01-06 10:15:23,349 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 88 [2021-01-06 10:15:23,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:23,349 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2021-01-06 10:15:23,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:15:23,349 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2021-01-06 10:15:23,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-01-06 10:15:23,350 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:23,351 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 10:15:23,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 10:15:23,565 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:23,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:23,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1409703947, now seen corresponding path program 10 times [2021-01-06 10:15:23,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:23,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267144128] [2021-01-06 10:15:23,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:23,582 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:23,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1465253398] [2021-01-06 10:15:23,583 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 10:15:23,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:15:23,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:23,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:15:23,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:23,957 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-01-06 10:15:23,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267144128] [2021-01-06 10:15:23,958 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:23,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465253398] [2021-01-06 10:15:23,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:23,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-01-06 10:15:23,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182079572] [2021-01-06 10:15:23,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:15:23,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:23,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:15:23,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:15:23,963 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand 13 states. [2021-01-06 10:15:24,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:24,033 INFO L93 Difference]: Finished difference Result 176 states and 196 transitions. [2021-01-06 10:15:24,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:15:24,034 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 97 [2021-01-06 10:15:24,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:24,035 INFO L225 Difference]: With dead ends: 176 [2021-01-06 10:15:24,035 INFO L226 Difference]: Without dead ends: 101 [2021-01-06 10:15:24,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:15:24,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-01-06 10:15:24,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2021-01-06 10:15:24,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2021-01-06 10:15:24,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2021-01-06 10:15:24,048 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 97 [2021-01-06 10:15:24,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:24,048 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2021-01-06 10:15:24,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:15:24,049 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2021-01-06 10:15:24,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-01-06 10:15:24,050 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:24,050 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 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 10:15:24,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 10:15:24,265 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:24,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:24,266 INFO L82 PathProgramCache]: Analyzing trace with hash -839941325, now seen corresponding path program 11 times [2021-01-06 10:15:24,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:24,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709640689] [2021-01-06 10:15:24,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:24,285 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:24,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1535340960] [2021-01-06 10:15:24,285 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 10:15:24,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 10:15:24,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:24,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:15:24,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:24,660 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2021-01-06 10:15:24,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709640689] [2021-01-06 10:15:24,661 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:24,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535340960] [2021-01-06 10:15:24,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:24,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:15:24,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028072009] [2021-01-06 10:15:24,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:15:24,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:24,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:15:24,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:15:24,663 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand 7 states. [2021-01-06 10:15:24,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:24,818 INFO L93 Difference]: Finished difference Result 175 states and 197 transitions. [2021-01-06 10:15:24,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:15:24,819 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 99 [2021-01-06 10:15:24,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:24,820 INFO L225 Difference]: With dead ends: 175 [2021-01-06 10:15:24,820 INFO L226 Difference]: Without dead ends: 112 [2021-01-06 10:15:24,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 93 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 10:15:24,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-01-06 10:15:24,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2021-01-06 10:15:24,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2021-01-06 10:15:24,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 119 transitions. [2021-01-06 10:15:24,828 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 119 transitions. Word has length 99 [2021-01-06 10:15:24,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:24,828 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 119 transitions. [2021-01-06 10:15:24,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:15:24,829 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 119 transitions. [2021-01-06 10:15:24,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-01-06 10:15:24,830 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:24,830 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 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 10:15:25,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:25,046 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:25,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:25,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1344803056, now seen corresponding path program 12 times [2021-01-06 10:15:25,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:25,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133748069] [2021-01-06 10:15:25,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:25,064 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:25,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [877131467] [2021-01-06 10:15:25,065 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 10:15:25,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 10:15:25,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:25,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:15:25,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:25,569 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2021-01-06 10:15:25,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133748069] [2021-01-06 10:15:25,569 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:25,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877131467] [2021-01-06 10:15:25,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:25,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:15:25,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952631432] [2021-01-06 10:15:25,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:15:25,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:25,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:15:25,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:15:25,571 INFO L87 Difference]: Start difference. First operand 109 states and 119 transitions. Second operand 6 states. [2021-01-06 10:15:25,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:25,603 INFO L93 Difference]: Finished difference Result 140 states and 153 transitions. [2021-01-06 10:15:25,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:15:25,603 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2021-01-06 10:15:25,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:25,605 INFO L225 Difference]: With dead ends: 140 [2021-01-06 10:15:25,605 INFO L226 Difference]: Without dead ends: 112 [2021-01-06 10:15:25,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 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 10:15:25,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-01-06 10:15:25,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2021-01-06 10:15:25,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2021-01-06 10:15:25,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2021-01-06 10:15:25,612 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 108 [2021-01-06 10:15:25,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:25,613 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2021-01-06 10:15:25,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:15:25,613 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2021-01-06 10:15:25,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-01-06 10:15:25,614 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:25,614 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 7, 7, 7, 7, 5, 5, 5, 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 10:15:25,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 10:15:25,828 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:25,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:25,829 INFO L82 PathProgramCache]: Analyzing trace with hash 2042426738, now seen corresponding path program 13 times [2021-01-06 10:15:25,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:25,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837472362] [2021-01-06 10:15:25,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:25,851 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:25,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [903361867] [2021-01-06 10:15:25,852 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 10:15:25,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:25,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:15:25,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:26,244 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-01-06 10:15:26,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837472362] [2021-01-06 10:15:26,244 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:26,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903361867] [2021-01-06 10:15:26,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:26,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-01-06 10:15:26,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030546696] [2021-01-06 10:15:26,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 10:15:26,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:26,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 10:15:26,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:15:26,246 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand 14 states. [2021-01-06 10:15:26,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:26,319 INFO L93 Difference]: Finished difference Result 200 states and 220 transitions. [2021-01-06 10:15:26,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 10:15:26,320 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 110 [2021-01-06 10:15:26,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:26,321 INFO L225 Difference]: With dead ends: 200 [2021-01-06 10:15:26,321 INFO L226 Difference]: Without dead ends: 114 [2021-01-06 10:15:26,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:15:26,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-01-06 10:15:26,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2021-01-06 10:15:26,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2021-01-06 10:15:26,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 123 transitions. [2021-01-06 10:15:26,330 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 123 transitions. Word has length 110 [2021-01-06 10:15:26,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:26,330 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 123 transitions. [2021-01-06 10:15:26,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 10:15:26,330 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 123 transitions. [2021-01-06 10:15:26,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-01-06 10:15:26,331 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:26,332 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 7, 7, 7, 7, 5, 5, 5, 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 10:15:26,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:26,533 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:26,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:26,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1265026804, now seen corresponding path program 14 times [2021-01-06 10:15:26,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:26,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019599425] [2021-01-06 10:15:26,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:26,561 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:26,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [984742831] [2021-01-06 10:15:26,562 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 10:15:26,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:15:26,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:26,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 10:15:26,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:26,946 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-01-06 10:15:26,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019599425] [2021-01-06 10:15:26,947 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:26,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984742831] [2021-01-06 10:15:26,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:26,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-01-06 10:15:26,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960953604] [2021-01-06 10:15:26,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 10:15:26,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:26,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 10:15:26,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:15:26,950 INFO L87 Difference]: Start difference. First operand 113 states and 123 transitions. Second operand 15 states. [2021-01-06 10:15:27,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:27,024 INFO L93 Difference]: Finished difference Result 202 states and 222 transitions. [2021-01-06 10:15:27,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 10:15:27,025 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 112 [2021-01-06 10:15:27,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:27,026 INFO L225 Difference]: With dead ends: 202 [2021-01-06 10:15:27,026 INFO L226 Difference]: Without dead ends: 116 [2021-01-06 10:15:27,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:15:27,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-01-06 10:15:27,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2021-01-06 10:15:27,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2021-01-06 10:15:27,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 125 transitions. [2021-01-06 10:15:27,035 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 125 transitions. Word has length 112 [2021-01-06 10:15:27,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:27,036 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 125 transitions. [2021-01-06 10:15:27,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 10:15:27,036 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 125 transitions. [2021-01-06 10:15:27,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-01-06 10:15:27,037 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:27,037 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 7, 7, 7, 7, 7, 7, 5, 5, 5, 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 10:15:27,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 10:15:27,250 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:27,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:27,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1507999734, now seen corresponding path program 15 times [2021-01-06 10:15:27,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:27,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083049585] [2021-01-06 10:15:27,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:27,281 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:27,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1869707958] [2021-01-06 10:15:27,282 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 10:15:27,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 10:15:27,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:27,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:15:27,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:27,929 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2021-01-06 10:15:27,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083049585] [2021-01-06 10:15:27,930 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:27,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869707958] [2021-01-06 10:15:27,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:27,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:15:27,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896716184] [2021-01-06 10:15:27,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:15:27,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:27,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:15:27,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:15:27,932 INFO L87 Difference]: Start difference. First operand 115 states and 125 transitions. Second operand 6 states. [2021-01-06 10:15:28,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:28,068 INFO L93 Difference]: Finished difference Result 193 states and 218 transitions. [2021-01-06 10:15:28,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:15:28,069 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2021-01-06 10:15:28,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:28,070 INFO L225 Difference]: With dead ends: 193 [2021-01-06 10:15:28,070 INFO L226 Difference]: Without dead ends: 130 [2021-01-06 10:15:28,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 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 10:15:28,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-01-06 10:15:28,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 124. [2021-01-06 10:15:28,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2021-01-06 10:15:28,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 137 transitions. [2021-01-06 10:15:28,079 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 137 transitions. Word has length 114 [2021-01-06 10:15:28,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:28,079 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 137 transitions. [2021-01-06 10:15:28,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:15:28,080 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 137 transitions. [2021-01-06 10:15:28,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-01-06 10:15:28,081 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:28,081 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 8, 8, 8, 8, 8, 8, 5, 5, 5, 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 10:15:28,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 10:15:28,296 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:28,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:28,297 INFO L82 PathProgramCache]: Analyzing trace with hash 631086347, now seen corresponding path program 16 times [2021-01-06 10:15:28,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:28,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885782418] [2021-01-06 10:15:28,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:28,315 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:28,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1992105818] [2021-01-06 10:15:28,316 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 10:15:28,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:15:28,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:28,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:15:28,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:28,647 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 45 proven. 40 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-01-06 10:15:28,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885782418] [2021-01-06 10:15:28,647 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:28,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992105818] [2021-01-06 10:15:28,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:28,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 10:15:28,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973762228] [2021-01-06 10:15:28,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:15:28,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:28,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:15:28,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:15:28,649 INFO L87 Difference]: Start difference. First operand 124 states and 137 transitions. Second operand 9 states. [2021-01-06 10:15:28,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:28,902 INFO L93 Difference]: Finished difference Result 226 states and 268 transitions. [2021-01-06 10:15:28,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:15:28,903 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 123 [2021-01-06 10:15:28,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:28,905 INFO L225 Difference]: With dead ends: 226 [2021-01-06 10:15:28,906 INFO L226 Difference]: Without dead ends: 157 [2021-01-06 10:15:28,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 115 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 10:15:28,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-01-06 10:15:28,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 151. [2021-01-06 10:15:28,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2021-01-06 10:15:28,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 173 transitions. [2021-01-06 10:15:28,921 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 173 transitions. Word has length 123 [2021-01-06 10:15:28,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:28,922 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 173 transitions. [2021-01-06 10:15:28,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:15:28,922 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 173 transitions. [2021-01-06 10:15:28,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-01-06 10:15:28,924 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:28,925 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 11, 11, 11, 11, 11, 6, 6, 6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:29,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 10:15:29,137 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:29,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:29,138 INFO L82 PathProgramCache]: Analyzing trace with hash -466148810, now seen corresponding path program 17 times [2021-01-06 10:15:29,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:29,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47144487] [2021-01-06 10:15:29,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:29,160 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:29,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [293613782] [2021-01-06 10:15:29,161 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 10:15:29,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-01-06 10:15:29,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:29,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:15:29,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:29,682 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 96 proven. 40 refuted. 0 times theorem prover too weak. 577 trivial. 0 not checked. [2021-01-06 10:15:29,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47144487] [2021-01-06 10:15:29,683 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:29,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293613782] [2021-01-06 10:15:29,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:29,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:15:29,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001983667] [2021-01-06 10:15:29,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:15:29,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:29,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:15:29,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:15:29,686 INFO L87 Difference]: Start difference. First operand 151 states and 173 transitions. Second operand 8 states. [2021-01-06 10:15:29,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:29,849 INFO L93 Difference]: Finished difference Result 270 states and 316 transitions. [2021-01-06 10:15:29,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:15:29,850 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 150 [2021-01-06 10:15:29,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:29,851 INFO L225 Difference]: With dead ends: 270 [2021-01-06 10:15:29,852 INFO L226 Difference]: Without dead ends: 163 [2021-01-06 10:15:29,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 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 10:15:29,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-01-06 10:15:29,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 160. [2021-01-06 10:15:29,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2021-01-06 10:15:29,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 182 transitions. [2021-01-06 10:15:29,861 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 182 transitions. Word has length 150 [2021-01-06 10:15:29,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:29,862 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 182 transitions. [2021-01-06 10:15:29,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:15:29,862 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 182 transitions. [2021-01-06 10:15:29,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-01-06 10:15:29,863 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:29,864 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:30,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:30,079 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:30,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:30,080 INFO L82 PathProgramCache]: Analyzing trace with hash -755311091, now seen corresponding path program 18 times [2021-01-06 10:15:30,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:30,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814604966] [2021-01-06 10:15:30,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:30,101 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:30,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [161138275] [2021-01-06 10:15:30,102 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 [2021-01-06 10:15:30,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 10:15:30,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:30,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:15:30,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:30,730 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 799 trivial. 0 not checked. [2021-01-06 10:15:30,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814604966] [2021-01-06 10:15:30,731 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:30,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161138275] [2021-01-06 10:15:30,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:30,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:15:30,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587615422] [2021-01-06 10:15:30,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:15:30,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:30,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:15:30,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:15:30,732 INFO L87 Difference]: Start difference. First operand 160 states and 182 transitions. Second operand 7 states. [2021-01-06 10:15:30,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:30,764 INFO L93 Difference]: Finished difference Result 206 states and 235 transitions. [2021-01-06 10:15:30,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:15:30,765 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 159 [2021-01-06 10:15:30,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:30,767 INFO L225 Difference]: With dead ends: 206 [2021-01-06 10:15:30,768 INFO L226 Difference]: Without dead ends: 163 [2021-01-06 10:15:30,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 153 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 10:15:30,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-01-06 10:15:30,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2021-01-06 10:15:30,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2021-01-06 10:15:30,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 184 transitions. [2021-01-06 10:15:30,779 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 184 transitions. Word has length 159 [2021-01-06 10:15:30,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:30,779 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 184 transitions. [2021-01-06 10:15:30,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:15:30,780 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 184 transitions. [2021-01-06 10:15:30,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-01-06 10:15:30,781 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:30,781 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:30,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-01-06 10:15:30,995 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:30,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:30,996 INFO L82 PathProgramCache]: Analyzing trace with hash -902385397, now seen corresponding path program 19 times [2021-01-06 10:15:30,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:30,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329243649] [2021-01-06 10:15:30,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:31,019 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:31,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1997311584] [2021-01-06 10:15:31,020 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:31,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 10:15:31,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:31,503 INFO L134 CoverageAnalysis]: Checked inductivity of 824 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 655 trivial. 0 not checked. [2021-01-06 10:15:31,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329243649] [2021-01-06 10:15:31,504 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:31,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997311584] [2021-01-06 10:15:31,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:31,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-01-06 10:15:31,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092002370] [2021-01-06 10:15:31,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 10:15:31,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:31,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 10:15:31,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:15:31,506 INFO L87 Difference]: Start difference. First operand 162 states and 184 transitions. Second operand 16 states. [2021-01-06 10:15:31,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:31,583 INFO L93 Difference]: Finished difference Result 298 states and 342 transitions. [2021-01-06 10:15:31,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 10:15:31,584 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 161 [2021-01-06 10:15:31,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:31,585 INFO L225 Difference]: With dead ends: 298 [2021-01-06 10:15:31,586 INFO L226 Difference]: Without dead ends: 165 [2021-01-06 10:15:31,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:15:31,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-01-06 10:15:31,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2021-01-06 10:15:31,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2021-01-06 10:15:31,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 186 transitions. [2021-01-06 10:15:31,596 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 186 transitions. Word has length 161 [2021-01-06 10:15:31,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:31,596 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 186 transitions. [2021-01-06 10:15:31,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 10:15:31,597 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 186 transitions. [2021-01-06 10:15:31,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-01-06 10:15:31,598 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:31,598 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:31,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:31,813 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:31,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:31,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1609802825, now seen corresponding path program 20 times [2021-01-06 10:15:31,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:31,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804512739] [2021-01-06 10:15:31,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:31,836 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:31,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1877803394] [2021-01-06 10:15:31,836 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:31,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:15:31,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:31,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 10:15:32,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:32,302 INFO L134 CoverageAnalysis]: Checked inductivity of 851 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 655 trivial. 0 not checked. [2021-01-06 10:15:32,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804512739] [2021-01-06 10:15:32,302 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:32,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877803394] [2021-01-06 10:15:32,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:32,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-01-06 10:15:32,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869044786] [2021-01-06 10:15:32,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 10:15:32,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:32,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 10:15:32,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:15:32,304 INFO L87 Difference]: Start difference. First operand 164 states and 186 transitions. Second operand 17 states. [2021-01-06 10:15:32,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:32,361 INFO L93 Difference]: Finished difference Result 300 states and 344 transitions. [2021-01-06 10:15:32,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 10:15:32,362 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 163 [2021-01-06 10:15:32,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:32,363 INFO L225 Difference]: With dead ends: 300 [2021-01-06 10:15:32,363 INFO L226 Difference]: Without dead ends: 167 [2021-01-06 10:15:32,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:15:32,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-01-06 10:15:32,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2021-01-06 10:15:32,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2021-01-06 10:15:32,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 188 transitions. [2021-01-06 10:15:32,372 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 188 transitions. Word has length 163 [2021-01-06 10:15:32,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:32,372 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 188 transitions. [2021-01-06 10:15:32,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 10:15:32,372 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 188 transitions. [2021-01-06 10:15:32,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-01-06 10:15:32,373 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:32,374 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:32,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 10:15:32,589 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:32,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:32,590 INFO L82 PathProgramCache]: Analyzing trace with hash 2051063815, now seen corresponding path program 21 times [2021-01-06 10:15:32,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:32,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512332463] [2021-01-06 10:15:32,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:32,625 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:32,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1390303923] [2021-01-06 10:15:32,626 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:32,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 10:15:32,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:32,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:15:32,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:33,030 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2021-01-06 10:15:33,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512332463] [2021-01-06 10:15:33,031 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:33,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390303923] [2021-01-06 10:15:33,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:33,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:15:33,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485409861] [2021-01-06 10:15:33,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:15:33,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:33,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:15:33,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:15:33,032 INFO L87 Difference]: Start difference. First operand 166 states and 188 transitions. Second operand 8 states. [2021-01-06 10:15:33,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:33,065 INFO L93 Difference]: Finished difference Result 212 states and 241 transitions. [2021-01-06 10:15:33,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:15:33,066 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 165 [2021-01-06 10:15:33,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:33,067 INFO L225 Difference]: With dead ends: 212 [2021-01-06 10:15:33,068 INFO L226 Difference]: Without dead ends: 169 [2021-01-06 10:15:33,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 158 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 10:15:33,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-01-06 10:15:33,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2021-01-06 10:15:33,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2021-01-06 10:15:33,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 190 transitions. [2021-01-06 10:15:33,076 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 190 transitions. Word has length 165 [2021-01-06 10:15:33,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:33,076 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 190 transitions. [2021-01-06 10:15:33,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:15:33,076 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 190 transitions. [2021-01-06 10:15:33,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-01-06 10:15:33,077 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:33,077 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:33,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-06 10:15:33,292 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:33,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:33,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1215562619, now seen corresponding path program 22 times [2021-01-06 10:15:33,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:33,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126016071] [2021-01-06 10:15:33,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:33,309 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:33,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [998153991] [2021-01-06 10:15:33,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:33,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:15:33,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:33,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:15:33,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:33,731 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 53 proven. 155 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2021-01-06 10:15:33,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126016071] [2021-01-06 10:15:33,732 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:33,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998153991] [2021-01-06 10:15:33,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:33,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-01-06 10:15:33,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422179298] [2021-01-06 10:15:33,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 10:15:33,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:33,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 10:15:33,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:15:33,734 INFO L87 Difference]: Start difference. First operand 168 states and 190 transitions. Second operand 14 states. [2021-01-06 10:15:34,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:34,070 INFO L93 Difference]: Finished difference Result 316 states and 385 transitions. [2021-01-06 10:15:34,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 10:15:34,071 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 167 [2021-01-06 10:15:34,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:34,072 INFO L225 Difference]: With dead ends: 316 [2021-01-06 10:15:34,072 INFO L226 Difference]: Without dead ends: 219 [2021-01-06 10:15:34,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:15:34,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-01-06 10:15:34,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 213. [2021-01-06 10:15:34,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2021-01-06 10:15:34,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 250 transitions. [2021-01-06 10:15:34,081 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 250 transitions. Word has length 167 [2021-01-06 10:15:34,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:34,082 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 250 transitions. [2021-01-06 10:15:34,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 10:15:34,082 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 250 transitions. [2021-01-06 10:15:34,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-01-06 10:15:34,083 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:34,083 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 15, 15, 11, 11, 11, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:34,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 10:15:34,299 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:34,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:34,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1651850840, now seen corresponding path program 23 times [2021-01-06 10:15:34,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:34,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262229589] [2021-01-06 10:15:34,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:34,319 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:34,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2054178691] [2021-01-06 10:15:34,319 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:34,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-01-06 10:15:34,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:35,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:15:35,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:35,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1536 backedges. 213 proven. 57 refuted. 0 times theorem prover too weak. 1266 trivial. 0 not checked. [2021-01-06 10:15:35,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262229589] [2021-01-06 10:15:35,234 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:35,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054178691] [2021-01-06 10:15:35,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:35,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 10:15:35,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427685225] [2021-01-06 10:15:35,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:15:35,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:35,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:15:35,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:15:35,237 INFO L87 Difference]: Start difference. First operand 213 states and 250 transitions. Second operand 9 states. [2021-01-06 10:15:35,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:35,375 INFO L93 Difference]: Finished difference Result 387 states and 463 transitions. [2021-01-06 10:15:35,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:15:35,376 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 212 [2021-01-06 10:15:35,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:35,377 INFO L225 Difference]: With dead ends: 387 [2021-01-06 10:15:35,378 INFO L226 Difference]: Without dead ends: 225 [2021-01-06 10:15:35,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 204 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 10:15:35,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-01-06 10:15:35,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2021-01-06 10:15:35,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2021-01-06 10:15:35,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 259 transitions. [2021-01-06 10:15:35,387 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 259 transitions. Word has length 212 [2021-01-06 10:15:35,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:35,388 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 259 transitions. [2021-01-06 10:15:35,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:15:35,388 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 259 transitions. [2021-01-06 10:15:35,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-01-06 10:15:35,389 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:35,390 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 15, 15, 11, 11, 11, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:35,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-06 10:15:35,605 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:35,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:35,606 INFO L82 PathProgramCache]: Analyzing trace with hash 20245667, now seen corresponding path program 24 times [2021-01-06 10:15:35,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:35,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910204437] [2021-01-06 10:15:35,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:35,628 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:35,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1210530303] [2021-01-06 10:15:35,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:36,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 10:15:36,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:36,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:15:36,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:36,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1692 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1656 trivial. 0 not checked. [2021-01-06 10:15:36,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910204437] [2021-01-06 10:15:36,666 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:36,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210530303] [2021-01-06 10:15:36,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:36,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 10:15:36,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011992018] [2021-01-06 10:15:36,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:15:36,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:36,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:15:36,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:15:36,668 INFO L87 Difference]: Start difference. First operand 222 states and 259 transitions. Second operand 9 states. [2021-01-06 10:15:36,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:36,711 INFO L93 Difference]: Finished difference Result 286 states and 335 transitions. [2021-01-06 10:15:36,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:15:36,712 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 221 [2021-01-06 10:15:36,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:36,713 INFO L225 Difference]: With dead ends: 286 [2021-01-06 10:15:36,714 INFO L226 Difference]: Without dead ends: 225 [2021-01-06 10:15:36,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 213 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 10:15:36,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-01-06 10:15:36,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2021-01-06 10:15:36,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2021-01-06 10:15:36,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 261 transitions. [2021-01-06 10:15:36,722 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 261 transitions. Word has length 221 [2021-01-06 10:15:36,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:36,723 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 261 transitions. [2021-01-06 10:15:36,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:15:36,723 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 261 transitions. [2021-01-06 10:15:36,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-01-06 10:15:36,724 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:36,724 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 15, 15, 11, 11, 11, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:36,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 10:15:36,940 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:36,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:36,941 INFO L82 PathProgramCache]: Analyzing trace with hash 2073585185, now seen corresponding path program 25 times [2021-01-06 10:15:36,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:36,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470704642] [2021-01-06 10:15:36,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:36,960 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:36,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2133547191] [2021-01-06 10:15:36,960 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:37,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:37,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 10:15:37,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:37,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1480 trivial. 0 not checked. [2021-01-06 10:15:37,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470704642] [2021-01-06 10:15:37,494 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:37,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133547191] [2021-01-06 10:15:37,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:37,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-01-06 10:15:37,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998559007] [2021-01-06 10:15:37,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 10:15:37,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:37,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 10:15:37,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:15:37,497 INFO L87 Difference]: Start difference. First operand 224 states and 261 transitions. Second operand 18 states. [2021-01-06 10:15:37,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:37,559 INFO L93 Difference]: Finished difference Result 418 states and 492 transitions. [2021-01-06 10:15:37,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 10:15:37,560 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 223 [2021-01-06 10:15:37,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:37,561 INFO L225 Difference]: With dead ends: 418 [2021-01-06 10:15:37,561 INFO L226 Difference]: Without dead ends: 227 [2021-01-06 10:15:37,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:15:37,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-01-06 10:15:37,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2021-01-06 10:15:37,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2021-01-06 10:15:37,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 263 transitions. [2021-01-06 10:15:37,570 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 263 transitions. Word has length 223 [2021-01-06 10:15:37,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:37,571 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 263 transitions. [2021-01-06 10:15:37,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 10:15:37,571 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 263 transitions. [2021-01-06 10:15:37,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-01-06 10:15:37,572 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:37,572 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 16, 16, 11, 11, 11, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:37,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 10:15:37,787 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:37,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:37,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1482678049, now seen corresponding path program 26 times [2021-01-06 10:15:37,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:37,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388260942] [2021-01-06 10:15:37,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:37,807 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:37,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [480218861] [2021-01-06 10:15:37,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:37,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:15:37,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:37,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 10:15:37,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:38,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1736 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1480 trivial. 0 not checked. [2021-01-06 10:15:38,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388260942] [2021-01-06 10:15:38,391 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:38,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480218861] [2021-01-06 10:15:38,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:38,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-01-06 10:15:38,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798110972] [2021-01-06 10:15:38,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 10:15:38,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:38,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 10:15:38,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:15:38,393 INFO L87 Difference]: Start difference. First operand 226 states and 263 transitions. Second operand 19 states. [2021-01-06 10:15:38,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:38,461 INFO L93 Difference]: Finished difference Result 420 states and 494 transitions. [2021-01-06 10:15:38,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 10:15:38,462 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 225 [2021-01-06 10:15:38,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:38,463 INFO L225 Difference]: With dead ends: 420 [2021-01-06 10:15:38,463 INFO L226 Difference]: Without dead ends: 229 [2021-01-06 10:15:38,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:15:38,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-01-06 10:15:38,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 228. [2021-01-06 10:15:38,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2021-01-06 10:15:38,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 265 transitions. [2021-01-06 10:15:38,474 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 265 transitions. Word has length 225 [2021-01-06 10:15:38,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:38,475 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 265 transitions. [2021-01-06 10:15:38,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 10:15:38,475 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 265 transitions. [2021-01-06 10:15:38,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-01-06 10:15:38,476 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:38,476 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 17, 17, 11, 11, 11, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:38,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 10:15:38,688 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:38,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:38,688 INFO L82 PathProgramCache]: Analyzing trace with hash -257678307, now seen corresponding path program 27 times [2021-01-06 10:15:38,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:38,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131634322] [2021-01-06 10:15:38,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:38,711 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:38,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [223480977] [2021-01-06 10:15:38,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:39,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 10:15:39,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:39,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:15:39,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:39,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1769 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1720 trivial. 0 not checked. [2021-01-06 10:15:39,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131634322] [2021-01-06 10:15:39,626 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:39,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223480977] [2021-01-06 10:15:39,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:39,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 10:15:39,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239229673] [2021-01-06 10:15:39,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:15:39,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:39,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:15:39,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:15:39,628 INFO L87 Difference]: Start difference. First operand 228 states and 265 transitions. Second operand 10 states. [2021-01-06 10:15:39,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:39,670 INFO L93 Difference]: Finished difference Result 292 states and 341 transitions. [2021-01-06 10:15:39,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:15:39,671 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 227 [2021-01-06 10:15:39,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:39,673 INFO L225 Difference]: With dead ends: 292 [2021-01-06 10:15:39,673 INFO L226 Difference]: Without dead ends: 231 [2021-01-06 10:15:39,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 218 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 10:15:39,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-01-06 10:15:39,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 230. [2021-01-06 10:15:39,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2021-01-06 10:15:39,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 267 transitions. [2021-01-06 10:15:39,683 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 267 transitions. Word has length 227 [2021-01-06 10:15:39,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:39,683 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 267 transitions. [2021-01-06 10:15:39,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:15:39,684 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 267 transitions. [2021-01-06 10:15:39,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-01-06 10:15:39,685 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:39,685 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 17, 17, 11, 11, 11, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:39,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 10:15:39,898 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:39,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:39,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1276618523, now seen corresponding path program 28 times [2021-01-06 10:15:39,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:39,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117220496] [2021-01-06 10:15:39,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:39,917 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:39,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [578949048] [2021-01-06 10:15:39,918 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:40,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:15:40,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:40,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:15:40,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:40,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1784 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1720 trivial. 0 not checked. [2021-01-06 10:15:40,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117220496] [2021-01-06 10:15:40,370 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:40,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578949048] [2021-01-06 10:15:40,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:40,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 10:15:40,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995085544] [2021-01-06 10:15:40,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:15:40,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:40,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:15:40,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:15:40,372 INFO L87 Difference]: Start difference. First operand 230 states and 267 transitions. Second operand 11 states. [2021-01-06 10:15:40,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:40,410 INFO L93 Difference]: Finished difference Result 294 states and 343 transitions. [2021-01-06 10:15:40,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:15:40,411 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 229 [2021-01-06 10:15:40,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:40,412 INFO L225 Difference]: With dead ends: 294 [2021-01-06 10:15:40,412 INFO L226 Difference]: Without dead ends: 233 [2021-01-06 10:15:40,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 219 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 10:15:40,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-01-06 10:15:40,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 232. [2021-01-06 10:15:40,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2021-01-06 10:15:40,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 269 transitions. [2021-01-06 10:15:40,420 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 269 transitions. Word has length 229 [2021-01-06 10:15:40,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:40,421 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 269 transitions. [2021-01-06 10:15:40,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:15:40,421 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 269 transitions. [2021-01-06 10:15:40,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-01-06 10:15:40,422 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:40,423 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 17, 17, 11, 11, 11, 9, 9, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:40,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:40,638 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:40,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:40,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1732877671, now seen corresponding path program 29 times [2021-01-06 10:15:40,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:40,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199649524] [2021-01-06 10:15:40,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:40,665 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:40,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [483327211] [2021-01-06 10:15:40,665 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:41,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-01-06 10:15:41,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:41,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:15:41,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:42,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1801 backedges. 245 proven. 77 refuted. 0 times theorem prover too weak. 1479 trivial. 0 not checked. [2021-01-06 10:15:42,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199649524] [2021-01-06 10:15:42,082 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:42,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483327211] [2021-01-06 10:15:42,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:42,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 10:15:42,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014269543] [2021-01-06 10:15:42,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:15:42,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:42,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:15:42,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:15:42,083 INFO L87 Difference]: Start difference. First operand 232 states and 269 transitions. Second operand 10 states. [2021-01-06 10:15:42,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:42,234 INFO L93 Difference]: Finished difference Result 418 states and 494 transitions. [2021-01-06 10:15:42,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:15:42,234 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 231 [2021-01-06 10:15:42,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:42,236 INFO L225 Difference]: With dead ends: 418 [2021-01-06 10:15:42,236 INFO L226 Difference]: Without dead ends: 244 [2021-01-06 10:15:42,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 222 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 10:15:42,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-01-06 10:15:42,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 241. [2021-01-06 10:15:42,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2021-01-06 10:15:42,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 278 transitions. [2021-01-06 10:15:42,246 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 278 transitions. Word has length 231 [2021-01-06 10:15:42,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:42,246 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 278 transitions. [2021-01-06 10:15:42,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:15:42,246 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 278 transitions. [2021-01-06 10:15:42,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-01-06 10:15:42,248 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:42,248 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 17, 17, 11, 11, 11, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:42,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:42,463 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:42,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:42,464 INFO L82 PathProgramCache]: Analyzing trace with hash -106153150, now seen corresponding path program 30 times [2021-01-06 10:15:42,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:42,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553240692] [2021-01-06 10:15:42,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:42,484 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:42,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1275942449] [2021-01-06 10:15:42,484 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:46,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 10:15:46,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:46,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:15:46,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:46,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1966 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1885 trivial. 0 not checked. [2021-01-06 10:15:46,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553240692] [2021-01-06 10:15:46,477 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:46,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275942449] [2021-01-06 10:15:46,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:46,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 10:15:46,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710248664] [2021-01-06 10:15:46,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 10:15:46,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:46,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 10:15:46,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:15:46,479 INFO L87 Difference]: Start difference. First operand 241 states and 278 transitions. Second operand 12 states. [2021-01-06 10:15:46,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:46,530 INFO L93 Difference]: Finished difference Result 308 states and 357 transitions. [2021-01-06 10:15:46,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:15:46,531 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 240 [2021-01-06 10:15:46,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:46,533 INFO L225 Difference]: With dead ends: 308 [2021-01-06 10:15:46,533 INFO L226 Difference]: Without dead ends: 244 [2021-01-06 10:15:46,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 229 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 10:15:46,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-01-06 10:15:46,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 243. [2021-01-06 10:15:46,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2021-01-06 10:15:46,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 280 transitions. [2021-01-06 10:15:46,543 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 280 transitions. Word has length 240 [2021-01-06 10:15:46,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:46,543 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 280 transitions. [2021-01-06 10:15:46,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 10:15:46,543 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 280 transitions. [2021-01-06 10:15:46,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-01-06 10:15:46,545 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:46,545 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 17, 17, 11, 11, 11, 10, 10, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:46,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-01-06 10:15:46,760 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:46,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:46,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1904049724, now seen corresponding path program 31 times [2021-01-06 10:15:46,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:46,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835072234] [2021-01-06 10:15:46,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:46,778 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:46,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1585501290] [2021-01-06 10:15:46,779 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:46,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:15:46,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 10:15:46,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:47,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1696 trivial. 0 not checked. [2021-01-06 10:15:47,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835072234] [2021-01-06 10:15:47,383 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:47,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585501290] [2021-01-06 10:15:47,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:47,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-01-06 10:15:47,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112052941] [2021-01-06 10:15:47,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 10:15:47,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:47,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 10:15:47,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:15:47,385 INFO L87 Difference]: Start difference. First operand 243 states and 280 transitions. Second operand 20 states. [2021-01-06 10:15:47,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:47,451 INFO L93 Difference]: Finished difference Result 452 states and 526 transitions. [2021-01-06 10:15:47,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 10:15:47,452 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 242 [2021-01-06 10:15:47,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:47,453 INFO L225 Difference]: With dead ends: 452 [2021-01-06 10:15:47,453 INFO L226 Difference]: Without dead ends: 246 [2021-01-06 10:15:47,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:15:47,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-01-06 10:15:47,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2021-01-06 10:15:47,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2021-01-06 10:15:47,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 282 transitions. [2021-01-06 10:15:47,462 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 282 transitions. Word has length 242 [2021-01-06 10:15:47,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:47,463 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 282 transitions. [2021-01-06 10:15:47,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 10:15:47,463 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 282 transitions. [2021-01-06 10:15:47,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-01-06 10:15:47,464 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:47,465 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 18, 18, 11, 11, 11, 10, 10, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:47,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:47,676 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:47,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:47,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1056547398, now seen corresponding path program 32 times [2021-01-06 10:15:47,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:47,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098417758] [2021-01-06 10:15:47,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:47,696 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:47,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [574653047] [2021-01-06 10:15:47,696 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:47,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:15:47,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:47,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 10:15:47,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:48,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1696 trivial. 0 not checked. [2021-01-06 10:15:48,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098417758] [2021-01-06 10:15:48,353 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:48,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574653047] [2021-01-06 10:15:48,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:48,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-01-06 10:15:48,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758964280] [2021-01-06 10:15:48,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 10:15:48,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:48,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 10:15:48,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:15:48,355 INFO L87 Difference]: Start difference. First operand 245 states and 282 transitions. Second operand 21 states. [2021-01-06 10:15:48,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:48,433 INFO L93 Difference]: Finished difference Result 454 states and 528 transitions. [2021-01-06 10:15:48,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 10:15:48,434 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 244 [2021-01-06 10:15:48,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:48,435 INFO L225 Difference]: With dead ends: 454 [2021-01-06 10:15:48,435 INFO L226 Difference]: Without dead ends: 248 [2021-01-06 10:15:48,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:15:48,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-01-06 10:15:48,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2021-01-06 10:15:48,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2021-01-06 10:15:48,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 284 transitions. [2021-01-06 10:15:48,444 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 284 transitions. Word has length 244 [2021-01-06 10:15:48,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:48,445 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 284 transitions. [2021-01-06 10:15:48,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 10:15:48,445 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 284 transitions. [2021-01-06 10:15:48,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-01-06 10:15:48,446 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:48,447 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 11, 11, 11, 10, 10, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:48,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:48,660 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:48,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:48,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1372935608, now seen corresponding path program 33 times [2021-01-06 10:15:48,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:48,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452655407] [2021-01-06 10:15:48,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:48,683 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:48,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [122230943] [2021-01-06 10:15:48,685 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:49,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-01-06 10:15:49,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:49,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 10:15:49,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:49,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2057 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1957 trivial. 0 not checked. [2021-01-06 10:15:49,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452655407] [2021-01-06 10:15:49,896 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:49,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122230943] [2021-01-06 10:15:49,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:49,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-01-06 10:15:49,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564257694] [2021-01-06 10:15:49,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:15:49,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:49,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:15:49,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:15:49,898 INFO L87 Difference]: Start difference. First operand 247 states and 284 transitions. Second operand 13 states. [2021-01-06 10:15:49,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:49,941 INFO L93 Difference]: Finished difference Result 314 states and 363 transitions. [2021-01-06 10:15:49,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:15:49,941 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 246 [2021-01-06 10:15:49,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:49,943 INFO L225 Difference]: With dead ends: 314 [2021-01-06 10:15:49,943 INFO L226 Difference]: Without dead ends: 250 [2021-01-06 10:15:49,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:15:49,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-01-06 10:15:49,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 249. [2021-01-06 10:15:49,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2021-01-06 10:15:49,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 286 transitions. [2021-01-06 10:15:49,953 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 286 transitions. Word has length 246 [2021-01-06 10:15:49,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:49,953 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 286 transitions. [2021-01-06 10:15:49,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:15:49,953 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 286 transitions. [2021-01-06 10:15:49,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-01-06 10:15:49,955 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:49,955 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 11, 11, 11, 11, 11, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:50,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-01-06 10:15:50,169 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:50,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:50,170 INFO L82 PathProgramCache]: Analyzing trace with hash 488720202, now seen corresponding path program 34 times [2021-01-06 10:15:50,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:50,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193873715] [2021-01-06 10:15:50,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:50,195 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:50,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1304252238] [2021-01-06 10:15:50,196 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:15:50,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:15:50,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:15:50,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:15:50,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:15:50,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2078 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1957 trivial. 0 not checked. [2021-01-06 10:15:50,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193873715] [2021-01-06 10:15:50,681 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:15:50,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304252238] [2021-01-06 10:15:50,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:15:50,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-01-06 10:15:50,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081382916] [2021-01-06 10:15:50,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 10:15:50,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:15:50,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 10:15:50,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:15:50,682 INFO L87 Difference]: Start difference. First operand 249 states and 286 transitions. Second operand 14 states. [2021-01-06 10:15:50,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:15:50,740 INFO L93 Difference]: Finished difference Result 316 states and 365 transitions. [2021-01-06 10:15:50,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 10:15:50,740 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 248 [2021-01-06 10:15:50,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:15:50,742 INFO L225 Difference]: With dead ends: 316 [2021-01-06 10:15:50,742 INFO L226 Difference]: Without dead ends: 252 [2021-01-06 10:15:50,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:15:50,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-01-06 10:15:50,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 251. [2021-01-06 10:15:50,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2021-01-06 10:15:50,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 288 transitions. [2021-01-06 10:15:50,750 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 288 transitions. Word has length 248 [2021-01-06 10:15:50,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:15:50,751 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 288 transitions. [2021-01-06 10:15:50,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 10:15:50,751 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 288 transitions. [2021-01-06 10:15:50,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-01-06 10:15:50,752 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:15:50,753 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 12, 12, 11, 11, 11, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:15:50,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-01-06 10:15:50,967 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:15:50,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:15:50,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1461408820, now seen corresponding path program 35 times [2021-01-06 10:15:50,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:15:50,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824442229] [2021-01-06 10:15:50,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:15:50,987 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:15:50,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [359823432] [2021-01-06 10:15:50,987 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:16:14,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-01-06 10:16:14,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:16:14,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:16:14,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:16:14,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2101 backedges. 277 proven. 100 refuted. 0 times theorem prover too weak. 1724 trivial. 0 not checked. [2021-01-06 10:16:14,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824442229] [2021-01-06 10:16:14,856 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:16:14,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359823432] [2021-01-06 10:16:14,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:16:14,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 10:16:14,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638649934] [2021-01-06 10:16:14,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:16:14,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:16:14,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:16:14,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:16:14,858 INFO L87 Difference]: Start difference. First operand 251 states and 288 transitions. Second operand 11 states. [2021-01-06 10:16:15,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:16:15,019 INFO L93 Difference]: Finished difference Result 449 states and 525 transitions. [2021-01-06 10:16:15,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:16:15,020 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 250 [2021-01-06 10:16:15,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:16:15,021 INFO L225 Difference]: With dead ends: 449 [2021-01-06 10:16:15,022 INFO L226 Difference]: Without dead ends: 263 [2021-01-06 10:16:15,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 240 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 10:16:15,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-01-06 10:16:15,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 260. [2021-01-06 10:16:15,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2021-01-06 10:16:15,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 297 transitions. [2021-01-06 10:16:15,032 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 297 transitions. Word has length 250 [2021-01-06 10:16:15,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:16:15,032 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 297 transitions. [2021-01-06 10:16:15,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:16:15,033 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 297 transitions. [2021-01-06 10:16:15,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-01-06 10:16:15,034 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:16:15,034 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 19, 19, 12, 12, 11, 11, 11, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:16:15,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-01-06 10:16:15,235 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:16:15,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:16:15,236 INFO L82 PathProgramCache]: Analyzing trace with hash -96172113, now seen corresponding path program 36 times [2021-01-06 10:16:15,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:16:15,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922937008] [2021-01-06 10:16:15,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:16:15,255 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:16:15,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2088809534] [2021-01-06 10:16:15,255 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:16:18,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 10:16:18,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:16:18,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:16:18,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:16:18,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2275 backedges. 309 proven. 126 refuted. 0 times theorem prover too weak. 1840 trivial. 0 not checked. [2021-01-06 10:16:18,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922937008] [2021-01-06 10:16:18,722 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:16:18,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088809534] [2021-01-06 10:16:18,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:16:18,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 10:16:18,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582344938] [2021-01-06 10:16:18,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 10:16:18,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:16:18,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 10:16:18,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:16:18,724 INFO L87 Difference]: Start difference. First operand 260 states and 297 transitions. Second operand 12 states. [2021-01-06 10:16:18,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:16:18,910 INFO L93 Difference]: Finished difference Result 464 states and 540 transitions. [2021-01-06 10:16:18,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:16:18,910 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 259 [2021-01-06 10:16:18,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:16:18,912 INFO L225 Difference]: With dead ends: 464 [2021-01-06 10:16:18,912 INFO L226 Difference]: Without dead ends: 272 [2021-01-06 10:16:18,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 248 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 10:16:18,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-01-06 10:16:18,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 269. [2021-01-06 10:16:18,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2021-01-06 10:16:18,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 306 transitions. [2021-01-06 10:16:18,921 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 306 transitions. Word has length 259 [2021-01-06 10:16:18,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:16:18,922 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 306 transitions. [2021-01-06 10:16:18,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 10:16:18,922 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 306 transitions. [2021-01-06 10:16:18,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-01-06 10:16:18,924 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:16:18,924 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 19, 19, 12, 12, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:16:19,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:16:19,139 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:16:19,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:16:19,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1562304684, now seen corresponding path program 37 times [2021-01-06 10:16:19,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:16:19,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672292173] [2021-01-06 10:16:19,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:16:19,158 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:16:19,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822765179] [2021-01-06 10:16:19,158 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:16:19,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:16:19,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 10:16:19,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:16:19,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2458 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 2097 trivial. 0 not checked. [2021-01-06 10:16:19,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672292173] [2021-01-06 10:16:19,801 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:16:19,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822765179] [2021-01-06 10:16:19,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:16:19,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-01-06 10:16:19,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001663241] [2021-01-06 10:16:19,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 10:16:19,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:16:19,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 10:16:19,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:16:19,802 INFO L87 Difference]: Start difference. First operand 269 states and 306 transitions. Second operand 22 states. [2021-01-06 10:16:19,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:16:19,888 INFO L93 Difference]: Finished difference Result 500 states and 574 transitions. [2021-01-06 10:16:19,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 10:16:19,889 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 268 [2021-01-06 10:16:19,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:16:19,890 INFO L225 Difference]: With dead ends: 500 [2021-01-06 10:16:19,890 INFO L226 Difference]: Without dead ends: 272 [2021-01-06 10:16:19,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:16:19,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-01-06 10:16:19,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 271. [2021-01-06 10:16:19,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2021-01-06 10:16:19,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 308 transitions. [2021-01-06 10:16:19,899 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 308 transitions. Word has length 268 [2021-01-06 10:16:19,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:16:19,899 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 308 transitions. [2021-01-06 10:16:19,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 10:16:19,900 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 308 transitions. [2021-01-06 10:16:19,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-01-06 10:16:19,901 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:16:19,901 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 20, 20, 12, 12, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:16:20,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-06 10:16:20,116 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:16:20,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:16:20,116 INFO L82 PathProgramCache]: Analyzing trace with hash 337150638, now seen corresponding path program 38 times [2021-01-06 10:16:20,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:16:20,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288035229] [2021-01-06 10:16:20,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:16:20,135 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:16:20,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [738972471] [2021-01-06 10:16:20,136 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:16:20,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:16:20,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:16:20,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 10:16:20,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:16:20,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2497 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 2097 trivial. 0 not checked. [2021-01-06 10:16:20,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288035229] [2021-01-06 10:16:20,866 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:16:20,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738972471] [2021-01-06 10:16:20,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:16:20,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-01-06 10:16:20,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628988575] [2021-01-06 10:16:20,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 10:16:20,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:16:20,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 10:16:20,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 10:16:20,868 INFO L87 Difference]: Start difference. First operand 271 states and 308 transitions. Second operand 23 states. [2021-01-06 10:16:20,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:16:20,949 INFO L93 Difference]: Finished difference Result 502 states and 576 transitions. [2021-01-06 10:16:20,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 10:16:20,950 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 270 [2021-01-06 10:16:20,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:16:20,952 INFO L225 Difference]: With dead ends: 502 [2021-01-06 10:16:20,952 INFO L226 Difference]: Without dead ends: 274 [2021-01-06 10:16:20,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 10:16:20,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-01-06 10:16:20,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 273. [2021-01-06 10:16:20,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2021-01-06 10:16:20,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 310 transitions. [2021-01-06 10:16:20,961 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 310 transitions. Word has length 270 [2021-01-06 10:16:20,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:16:20,961 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 310 transitions. [2021-01-06 10:16:20,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 10:16:20,961 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 310 transitions. [2021-01-06 10:16:20,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-01-06 10:16:20,963 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:16:20,963 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 12, 12, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:16:21,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:16:21,177 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:16:21,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:16:21,178 INFO L82 PathProgramCache]: Analyzing trace with hash -214848464, now seen corresponding path program 39 times [2021-01-06 10:16:21,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:16:21,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791237211] [2021-01-06 10:16:21,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:16:21,197 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:16:21,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [126655401] [2021-01-06 10:16:21,198 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:16:22,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-01-06 10:16:22,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:16:22,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 10:16:22,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:16:22,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2538 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 2394 trivial. 0 not checked. [2021-01-06 10:16:22,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791237211] [2021-01-06 10:16:22,841 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:16:22,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126655401] [2021-01-06 10:16:22,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:16:22,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-01-06 10:16:22,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828482990] [2021-01-06 10:16:22,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 10:16:22,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:16:22,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 10:16:22,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:16:22,843 INFO L87 Difference]: Start difference. First operand 273 states and 310 transitions. Second operand 15 states. [2021-01-06 10:16:22,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:16:22,908 INFO L93 Difference]: Finished difference Result 346 states and 395 transitions. [2021-01-06 10:16:22,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 10:16:22,909 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 272 [2021-01-06 10:16:22,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:16:22,910 INFO L225 Difference]: With dead ends: 346 [2021-01-06 10:16:22,910 INFO L226 Difference]: Without dead ends: 276 [2021-01-06 10:16:22,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:16:22,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-01-06 10:16:22,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 275. [2021-01-06 10:16:22,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2021-01-06 10:16:22,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 312 transitions. [2021-01-06 10:16:22,919 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 312 transitions. Word has length 272 [2021-01-06 10:16:22,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:16:22,919 INFO L481 AbstractCegarLoop]: Abstraction has 275 states and 312 transitions. [2021-01-06 10:16:22,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 10:16:22,920 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 312 transitions. [2021-01-06 10:16:22,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-01-06 10:16:22,921 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:16:22,921 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 13, 13, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:16:23,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:16:23,128 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:16:23,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:16:23,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1559173710, now seen corresponding path program 40 times [2021-01-06 10:16:23,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:16:23,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904376962] [2021-01-06 10:16:23,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:16:23,146 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:16:23,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [302721888] [2021-01-06 10:16:23,146 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:16:23,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:16:23,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:16:23,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 10:16:23,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:16:23,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2563 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 2122 trivial. 0 not checked. [2021-01-06 10:16:23,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904376962] [2021-01-06 10:16:23,823 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:16:23,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302721888] [2021-01-06 10:16:23,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:16:23,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-01-06 10:16:23,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228109267] [2021-01-06 10:16:23,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 10:16:23,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:16:23,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 10:16:23,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 10:16:23,824 INFO L87 Difference]: Start difference. First operand 275 states and 312 transitions. Second operand 24 states. [2021-01-06 10:16:23,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:16:23,917 INFO L93 Difference]: Finished difference Result 508 states and 582 transitions. [2021-01-06 10:16:23,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 10:16:23,918 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 274 [2021-01-06 10:16:23,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:16:23,919 INFO L225 Difference]: With dead ends: 508 [2021-01-06 10:16:23,919 INFO L226 Difference]: Without dead ends: 278 [2021-01-06 10:16:23,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 10:16:23,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-01-06 10:16:23,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 277. [2021-01-06 10:16:23,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2021-01-06 10:16:23,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 314 transitions. [2021-01-06 10:16:23,928 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 314 transitions. Word has length 274 [2021-01-06 10:16:23,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:16:23,928 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 314 transitions. [2021-01-06 10:16:23,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 10:16:23,928 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 314 transitions. [2021-01-06 10:16:23,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2021-01-06 10:16:23,930 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:16:23,930 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 21, 13, 13, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:16:24,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-01-06 10:16:24,144 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:16:24,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:16:24,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1768587724, now seen corresponding path program 41 times [2021-01-06 10:16:24,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:16:24,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866890039] [2021-01-06 10:16:24,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:16:24,163 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:16:24,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [819779395] [2021-01-06 10:16:24,164 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:16:54,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-01-06 10:16:54,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:16:54,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:16:54,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:16:54,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2606 backedges. 341 proven. 155 refuted. 0 times theorem prover too weak. 2110 trivial. 0 not checked. [2021-01-06 10:16:54,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866890039] [2021-01-06 10:16:54,499 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:16:54,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819779395] [2021-01-06 10:16:54,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:16:54,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-01-06 10:16:54,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384049117] [2021-01-06 10:16:54,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:16:54,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:16:54,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:16:54,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:16:54,503 INFO L87 Difference]: Start difference. First operand 277 states and 314 transitions. Second operand 13 states. [2021-01-06 10:16:54,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:16:54,698 INFO L93 Difference]: Finished difference Result 489 states and 565 transitions. [2021-01-06 10:16:54,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:16:54,698 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 276 [2021-01-06 10:16:54,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:16:54,701 INFO L225 Difference]: With dead ends: 489 [2021-01-06 10:16:54,701 INFO L226 Difference]: Without dead ends: 289 [2021-01-06 10:16:54,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:16:54,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-01-06 10:16:54,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 286. [2021-01-06 10:16:54,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2021-01-06 10:16:54,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 323 transitions. [2021-01-06 10:16:54,710 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 323 transitions. Word has length 276 [2021-01-06 10:16:54,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:16:54,711 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 323 transitions. [2021-01-06 10:16:54,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:16:54,711 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 323 transitions. [2021-01-06 10:16:54,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2021-01-06 10:16:54,713 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:16:54,713 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 13, 13, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:16:54,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:16:54,929 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:16:54,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:16:54,929 INFO L82 PathProgramCache]: Analyzing trace with hash 855560071, now seen corresponding path program 42 times [2021-01-06 10:16:54,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:16:54,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267294307] [2021-01-06 10:16:54,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:16:54,949 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:16:54,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2085534181] [2021-01-06 10:16:54,950 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:17:02,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-01-06 10:17:02,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:17:02,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 10:17:02,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:17:02,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2798 backedges. 415 proven. 229 refuted. 0 times theorem prover too weak. 2154 trivial. 0 not checked. [2021-01-06 10:17:02,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267294307] [2021-01-06 10:17:02,467 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:17:02,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085534181] [2021-01-06 10:17:02,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:17:02,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-01-06 10:17:02,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979214277] [2021-01-06 10:17:02,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 10:17:02,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:17:02,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 10:17:02,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=149, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:17:02,469 INFO L87 Difference]: Start difference. First operand 286 states and 323 transitions. Second operand 17 states. [2021-01-06 10:17:02,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:17:02,777 INFO L93 Difference]: Finished difference Result 510 states and 589 transitions. [2021-01-06 10:17:02,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 10:17:02,778 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 285 [2021-01-06 10:17:02,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:17:02,779 INFO L225 Difference]: With dead ends: 510 [2021-01-06 10:17:02,779 INFO L226 Difference]: Without dead ends: 304 [2021-01-06 10:17:02,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=149, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:17:02,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-01-06 10:17:02,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2021-01-06 10:17:02,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2021-01-06 10:17:02,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 341 transitions. [2021-01-06 10:17:02,791 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 341 transitions. Word has length 285 [2021-01-06 10:17:02,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:17:02,792 INFO L481 AbstractCegarLoop]: Abstraction has 304 states and 341 transitions. [2021-01-06 10:17:02,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 10:17:02,792 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 341 transitions. [2021-01-06 10:17:02,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2021-01-06 10:17:02,794 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:17:02,794 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 22, 22, 13, 13, 13, 13, 13, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:17:03,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-01-06 10:17:03,010 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:17:03,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:17:03,011 INFO L82 PathProgramCache]: Analyzing trace with hash 577012007, now seen corresponding path program 43 times [2021-01-06 10:17:03,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:17:03,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585099748] [2021-01-06 10:17:03,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:17:03,029 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:17:03,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1313882860] [2021-01-06 10:17:03,030 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:17:03,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:17:03,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 10:17:03,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:17:03,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3209 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2725 trivial. 0 not checked. [2021-01-06 10:17:03,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585099748] [2021-01-06 10:17:03,873 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:17:03,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313882860] [2021-01-06 10:17:03,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:17:03,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-01-06 10:17:03,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916010807] [2021-01-06 10:17:03,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 10:17:03,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:17:03,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 10:17:03,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:17:03,875 INFO L87 Difference]: Start difference. First operand 304 states and 341 transitions. Second operand 25 states. [2021-01-06 10:17:03,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:17:03,978 INFO L93 Difference]: Finished difference Result 564 states and 638 transitions. [2021-01-06 10:17:03,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 10:17:03,978 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 303 [2021-01-06 10:17:03,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:17:03,980 INFO L225 Difference]: With dead ends: 564 [2021-01-06 10:17:03,980 INFO L226 Difference]: Without dead ends: 307 [2021-01-06 10:17:03,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:17:03,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-01-06 10:17:03,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 306. [2021-01-06 10:17:03,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2021-01-06 10:17:03,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 343 transitions. [2021-01-06 10:17:03,988 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 343 transitions. Word has length 303 [2021-01-06 10:17:03,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:17:03,988 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 343 transitions. [2021-01-06 10:17:03,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 10:17:03,988 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 343 transitions. [2021-01-06 10:17:03,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2021-01-06 10:17:03,989 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:17:03,990 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 23, 23, 13, 13, 13, 13, 13, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:17:04,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-01-06 10:17:04,195 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:17:04,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:17:04,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1794510821, now seen corresponding path program 44 times [2021-01-06 10:17:04,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:17:04,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796094729] [2021-01-06 10:17:04,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:17:04,215 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:17:04,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [66046526] [2021-01-06 10:17:04,216 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:17:04,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:17:04,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:17:04,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 10:17:04,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:17:05,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3254 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 2725 trivial. 0 not checked. [2021-01-06 10:17:05,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796094729] [2021-01-06 10:17:05,075 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:17:05,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66046526] [2021-01-06 10:17:05,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:17:05,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-01-06 10:17:05,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362168869] [2021-01-06 10:17:05,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 10:17:05,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:17:05,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 10:17:05,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 10:17:05,077 INFO L87 Difference]: Start difference. First operand 306 states and 343 transitions. Second operand 26 states. [2021-01-06 10:17:05,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:17:05,168 INFO L93 Difference]: Finished difference Result 566 states and 640 transitions. [2021-01-06 10:17:05,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 10:17:05,169 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 305 [2021-01-06 10:17:05,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:17:05,171 INFO L225 Difference]: With dead ends: 566 [2021-01-06 10:17:05,172 INFO L226 Difference]: Without dead ends: 309 [2021-01-06 10:17:05,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 10:17:05,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-01-06 10:17:05,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 308. [2021-01-06 10:17:05,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2021-01-06 10:17:05,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 345 transitions. [2021-01-06 10:17:05,181 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 345 transitions. Word has length 305 [2021-01-06 10:17:05,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:17:05,182 INFO L481 AbstractCegarLoop]: Abstraction has 308 states and 345 transitions. [2021-01-06 10:17:05,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 10:17:05,182 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 345 transitions. [2021-01-06 10:17:05,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2021-01-06 10:17:05,183 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:17:05,184 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 13, 13, 13, 13, 13, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:17:05,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:17:05,398 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:17:05,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:17:05,398 INFO L82 PathProgramCache]: Analyzing trace with hash -715200733, now seen corresponding path program 45 times [2021-01-06 10:17:05,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:17:05,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373988452] [2021-01-06 10:17:05,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:17:05,418 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:17:05,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1566613655] [2021-01-06 10:17:05,419 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:17:06,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-01-06 10:17:06,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:17:06,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 10:17:06,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:17:07,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3301 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 3132 trivial. 0 not checked. [2021-01-06 10:17:07,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373988452] [2021-01-06 10:17:07,276 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:17:07,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566613655] [2021-01-06 10:17:07,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:17:07,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-01-06 10:17:07,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664991273] [2021-01-06 10:17:07,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 10:17:07,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:17:07,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 10:17:07,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:17:07,280 INFO L87 Difference]: Start difference. First operand 308 states and 345 transitions. Second operand 16 states. [2021-01-06 10:17:07,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:17:07,340 INFO L93 Difference]: Finished difference Result 390 states and 439 transitions. [2021-01-06 10:17:07,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 10:17:07,340 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 307 [2021-01-06 10:17:07,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:17:07,342 INFO L225 Difference]: With dead ends: 390 [2021-01-06 10:17:07,342 INFO L226 Difference]: Without dead ends: 311 [2021-01-06 10:17:07,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:17:07,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-01-06 10:17:07,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 310. [2021-01-06 10:17:07,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2021-01-06 10:17:07,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 347 transitions. [2021-01-06 10:17:07,353 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 347 transitions. Word has length 307 [2021-01-06 10:17:07,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:17:07,353 INFO L481 AbstractCegarLoop]: Abstraction has 310 states and 347 transitions. [2021-01-06 10:17:07,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 10:17:07,353 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 347 transitions. [2021-01-06 10:17:07,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2021-01-06 10:17:07,355 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:17:07,356 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 14, 14, 13, 13, 13, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:17:07,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-01-06 10:17:07,562 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:17:07,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:17:07,562 INFO L82 PathProgramCache]: Analyzing trace with hash 995929377, now seen corresponding path program 46 times [2021-01-06 10:17:07,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:17:07,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127865639] [2021-01-06 10:17:07,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:17:07,580 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:17:07,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1603419096] [2021-01-06 10:17:07,581 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:17:07,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:17:07,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:17:07,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 10:17:07,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:17:08,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3328 backedges. 425 proven. 301 refuted. 0 times theorem prover too weak. 2602 trivial. 0 not checked. [2021-01-06 10:17:08,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127865639] [2021-01-06 10:17:08,305 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:17:08,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603419096] [2021-01-06 10:17:08,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:17:08,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-01-06 10:17:08,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036517201] [2021-01-06 10:17:08,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 10:17:08,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:17:08,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 10:17:08,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:17:08,307 INFO L87 Difference]: Start difference. First operand 310 states and 347 transitions. Second operand 18 states. [2021-01-06 10:17:08,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:17:08,713 INFO L93 Difference]: Finished difference Result 537 states and 625 transitions. [2021-01-06 10:17:08,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 10:17:08,713 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 309 [2021-01-06 10:17:08,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:17:08,715 INFO L225 Difference]: With dead ends: 537 [2021-01-06 10:17:08,715 INFO L226 Difference]: Without dead ends: 352 [2021-01-06 10:17:08,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:17:08,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-01-06 10:17:08,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 346. [2021-01-06 10:17:08,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 346 states. [2021-01-06 10:17:08,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 395 transitions. [2021-01-06 10:17:08,726 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 395 transitions. Word has length 309 [2021-01-06 10:17:08,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:17:08,726 INFO L481 AbstractCegarLoop]: Abstraction has 346 states and 395 transitions. [2021-01-06 10:17:08,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 10:17:08,726 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 395 transitions. [2021-01-06 10:17:08,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2021-01-06 10:17:08,728 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:17:08,729 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 24, 24, 15, 15, 15, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:17:08,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:17:08,942 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:17:08,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:17:08,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1140453663, now seen corresponding path program 47 times [2021-01-06 10:17:08,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:17:08,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431940678] [2021-01-06 10:17:08,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:17:08,965 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:17:08,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1120047341] [2021-01-06 10:17:08,965 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:02,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2021-01-06 10:19:02,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:19:02,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 10:19:02,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:19:02,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4258 backedges. 601 proven. 260 refuted. 0 times theorem prover too weak. 3397 trivial. 0 not checked. [2021-01-06 10:19:02,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431940678] [2021-01-06 10:19:02,964 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:19:02,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120047341] [2021-01-06 10:19:02,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:19:02,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-01-06 10:19:02,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254006810] [2021-01-06 10:19:02,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 10:19:02,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:19:02,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 10:19:02,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:19:02,965 INFO L87 Difference]: Start difference. First operand 346 states and 395 transitions. Second operand 16 states. [2021-01-06 10:19:03,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:19:03,285 INFO L93 Difference]: Finished difference Result 614 states and 714 transitions. [2021-01-06 10:19:03,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 10:19:03,286 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 345 [2021-01-06 10:19:03,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:19:03,288 INFO L225 Difference]: With dead ends: 614 [2021-01-06 10:19:03,288 INFO L226 Difference]: Without dead ends: 358 [2021-01-06 10:19:03,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:19:03,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-01-06 10:19:03,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 355. [2021-01-06 10:19:03,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2021-01-06 10:19:03,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 404 transitions. [2021-01-06 10:19:03,301 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 404 transitions. Word has length 345 [2021-01-06 10:19:03,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:19:03,302 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 404 transitions. [2021-01-06 10:19:03,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 10:19:03,302 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 404 transitions. [2021-01-06 10:19:03,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2021-01-06 10:19:03,305 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:19:03,305 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 24, 24, 15, 15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:19:03,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-01-06 10:19:03,520 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:19:03,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:19:03,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1762299706, now seen corresponding path program 48 times [2021-01-06 10:19:03,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:19:03,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945519393] [2021-01-06 10:19:03,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:19:03,547 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:19:03,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2054870039] [2021-01-06 10:19:03,548 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:20,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2021-01-06 10:19:20,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:19:20,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 10:19:20,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:19:21,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4513 backedges. 597 proven. 495 refuted. 0 times theorem prover too weak. 3421 trivial. 0 not checked. [2021-01-06 10:19:21,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945519393] [2021-01-06 10:19:21,177 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:19:21,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054870039] [2021-01-06 10:19:21,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:19:21,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-01-06 10:19:21,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780139354] [2021-01-06 10:19:21,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 10:19:21,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:19:21,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 10:19:21,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:19:21,179 INFO L87 Difference]: Start difference. First operand 355 states and 404 transitions. Second operand 22 states. [2021-01-06 10:19:21,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:19:21,824 INFO L93 Difference]: Finished difference Result 606 states and 711 transitions. [2021-01-06 10:19:21,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 10:19:21,825 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 354 [2021-01-06 10:19:21,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:19:21,827 INFO L225 Difference]: With dead ends: 606 [2021-01-06 10:19:21,828 INFO L226 Difference]: Without dead ends: 391 [2021-01-06 10:19:21,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:19:21,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-01-06 10:19:21,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 391. [2021-01-06 10:19:21,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2021-01-06 10:19:21,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 452 transitions. [2021-01-06 10:19:21,838 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 452 transitions. Word has length 354 [2021-01-06 10:19:21,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:19:21,839 INFO L481 AbstractCegarLoop]: Abstraction has 391 states and 452 transitions. [2021-01-06 10:19:21,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 10:19:21,839 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 452 transitions. [2021-01-06 10:19:21,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-01-06 10:19:21,841 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:19:21,841 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 24, 24, 19, 19, 19, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:19:22,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:22,056 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:19:22,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:19:22,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1185464954, now seen corresponding path program 49 times [2021-01-06 10:19:22,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:19:22,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743455345] [2021-01-06 10:19:22,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:19:22,080 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:19:22,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1215597099] [2021-01-06 10:19:22,081 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:22,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:19:22,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 945 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 10:19:22,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:19:23,147 INFO L134 CoverageAnalysis]: Checked inductivity of 5623 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 5047 trivial. 0 not checked. [2021-01-06 10:19:23,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743455345] [2021-01-06 10:19:23,148 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:19:23,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215597099] [2021-01-06 10:19:23,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:19:23,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-01-06 10:19:23,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532148818] [2021-01-06 10:19:23,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 10:19:23,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:19:23,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 10:19:23,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 10:19:23,150 INFO L87 Difference]: Start difference. First operand 391 states and 452 transitions. Second operand 27 states. [2021-01-06 10:19:23,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:19:23,264 INFO L93 Difference]: Finished difference Result 734 states and 856 transitions. [2021-01-06 10:19:23,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 10:19:23,265 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 390 [2021-01-06 10:19:23,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:19:23,266 INFO L225 Difference]: With dead ends: 734 [2021-01-06 10:19:23,267 INFO L226 Difference]: Without dead ends: 394 [2021-01-06 10:19:23,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 10:19:23,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-01-06 10:19:23,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 393. [2021-01-06 10:19:23,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2021-01-06 10:19:23,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 454 transitions. [2021-01-06 10:19:23,275 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 454 transitions. Word has length 390 [2021-01-06 10:19:23,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:19:23,275 INFO L481 AbstractCegarLoop]: Abstraction has 393 states and 454 transitions. [2021-01-06 10:19:23,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 10:19:23,275 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 454 transitions. [2021-01-06 10:19:23,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2021-01-06 10:19:23,277 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:19:23,277 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 25, 25, 19, 19, 19, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:19:23,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-01-06 10:19:23,480 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:19:23,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:19:23,481 INFO L82 PathProgramCache]: Analyzing trace with hash 2034396668, now seen corresponding path program 50 times [2021-01-06 10:19:23,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:19:23,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632266571] [2021-01-06 10:19:23,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:19:23,508 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:19:23,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1921154501] [2021-01-06 10:19:23,508 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:23,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:19:23,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:19:23,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 951 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 10:19:23,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:19:24,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5672 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 5047 trivial. 0 not checked. [2021-01-06 10:19:24,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632266571] [2021-01-06 10:19:24,600 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:19:24,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921154501] [2021-01-06 10:19:24,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:19:24,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-01-06 10:19:24,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456265081] [2021-01-06 10:19:24,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 10:19:24,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:19:24,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 10:19:24,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:19:24,609 INFO L87 Difference]: Start difference. First operand 393 states and 454 transitions. Second operand 28 states. [2021-01-06 10:19:24,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:19:24,728 INFO L93 Difference]: Finished difference Result 736 states and 858 transitions. [2021-01-06 10:19:24,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 10:19:24,728 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 392 [2021-01-06 10:19:24,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:19:24,730 INFO L225 Difference]: With dead ends: 736 [2021-01-06 10:19:24,730 INFO L226 Difference]: Without dead ends: 396 [2021-01-06 10:19:24,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:19:24,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-01-06 10:19:24,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 395. [2021-01-06 10:19:24,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2021-01-06 10:19:24,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 456 transitions. [2021-01-06 10:19:24,746 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 456 transitions. Word has length 392 [2021-01-06 10:19:24,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:19:24,747 INFO L481 AbstractCegarLoop]: Abstraction has 395 states and 456 transitions. [2021-01-06 10:19:24,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 10:19:24,747 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 456 transitions. [2021-01-06 10:19:24,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2021-01-06 10:19:24,749 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:19:24,750 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 26, 26, 19, 19, 19, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:19:24,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:24,964 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:19:24,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:19:24,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1813987582, now seen corresponding path program 51 times [2021-01-06 10:19:24,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:19:24,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250818890] [2021-01-06 10:19:24,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:19:24,990 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:19:24,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1292674565] [2021-01-06 10:19:24,991 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:28,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-01-06 10:19:28,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:19:28,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 10:19:28,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:19:28,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5723 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 5527 trivial. 0 not checked. [2021-01-06 10:19:28,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250818890] [2021-01-06 10:19:28,807 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:19:28,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292674565] [2021-01-06 10:19:28,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:19:28,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-01-06 10:19:28,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891887689] [2021-01-06 10:19:28,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 10:19:28,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:19:28,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 10:19:28,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:19:28,809 INFO L87 Difference]: Start difference. First operand 395 states and 456 transitions. Second operand 17 states. [2021-01-06 10:19:28,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:19:28,883 INFO L93 Difference]: Finished difference Result 504 states and 585 transitions. [2021-01-06 10:19:28,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 10:19:28,884 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 394 [2021-01-06 10:19:28,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:19:28,886 INFO L225 Difference]: With dead ends: 504 [2021-01-06 10:19:28,886 INFO L226 Difference]: Without dead ends: 398 [2021-01-06 10:19:28,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:19:28,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-01-06 10:19:28,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 397. [2021-01-06 10:19:28,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2021-01-06 10:19:28,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 458 transitions. [2021-01-06 10:19:28,896 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 458 transitions. Word has length 394 [2021-01-06 10:19:28,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:19:28,897 INFO L481 AbstractCegarLoop]: Abstraction has 397 states and 458 transitions. [2021-01-06 10:19:28,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 10:19:28,897 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 458 transitions. [2021-01-06 10:19:28,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2021-01-06 10:19:28,899 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:19:28,900 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 26, 26, 19, 19, 19, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:19:29,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-01-06 10:19:29,115 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:19:29,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:19:29,116 INFO L82 PathProgramCache]: Analyzing trace with hash 524133888, now seen corresponding path program 52 times [2021-01-06 10:19:29,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:19:29,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303925973] [2021-01-06 10:19:29,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:19:29,138 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:19:29,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [933657232] [2021-01-06 10:19:29,139 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:29,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:19:29,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:19:29,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 10:19:29,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:19:30,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5752 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 5527 trivial. 0 not checked. [2021-01-06 10:19:30,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303925973] [2021-01-06 10:19:30,066 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:19:30,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933657232] [2021-01-06 10:19:30,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:19:30,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-01-06 10:19:30,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350278663] [2021-01-06 10:19:30,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 10:19:30,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:19:30,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 10:19:30,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:19:30,068 INFO L87 Difference]: Start difference. First operand 397 states and 458 transitions. Second operand 18 states. [2021-01-06 10:19:30,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:19:30,141 INFO L93 Difference]: Finished difference Result 506 states and 587 transitions. [2021-01-06 10:19:30,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 10:19:30,142 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 396 [2021-01-06 10:19:30,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:19:30,144 INFO L225 Difference]: With dead ends: 506 [2021-01-06 10:19:30,145 INFO L226 Difference]: Without dead ends: 400 [2021-01-06 10:19:30,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:19:30,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-01-06 10:19:30,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 399. [2021-01-06 10:19:30,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2021-01-06 10:19:30,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 460 transitions. [2021-01-06 10:19:30,156 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 460 transitions. Word has length 396 [2021-01-06 10:19:30,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:19:30,157 INFO L481 AbstractCegarLoop]: Abstraction has 399 states and 460 transitions. [2021-01-06 10:19:30,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 10:19:30,157 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 460 transitions. [2021-01-06 10:19:30,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2021-01-06 10:19:30,159 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:19:30,159 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 26, 26, 19, 19, 19, 16, 16, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:19:30,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:19:30,374 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:19:30,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:19:30,374 INFO L82 PathProgramCache]: Analyzing trace with hash -2074684798, now seen corresponding path program 53 times [2021-01-06 10:19:30,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:19:30,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484577120] [2021-01-06 10:19:30,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:19:30,398 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:19:30,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [780735684] [2021-01-06 10:19:30,399 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true