/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-crafted/mapavg4.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:44:00,291 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:44:00,294 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:44:00,330 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:44:00,331 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:44:00,333 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:44:00,334 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:44:00,337 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:44:00,339 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:44:00,340 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:44:00,342 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:44:00,343 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:44:00,344 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:44:00,345 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:44:00,347 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:44:00,348 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:44:00,365 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:44:00,367 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:44:00,375 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:44:00,381 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:44:00,383 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:44:00,386 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:44:00,387 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:44:00,388 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:44:00,398 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:44:00,413 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:44:00,414 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:44:00,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:44:00,419 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 00:44:00,469 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:44:00,469 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:44:00,473 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:44:00,474 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:44:00,474 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:44:00,474 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:44:00,474 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:44:00,475 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:44:00,475 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:44:00,475 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:44:00,475 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:44:00,475 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:44:00,476 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:44:00,476 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:44:00,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:44:00,478 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:44:00,479 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:44:00,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:44:00,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:44:00,479 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:44:00,479 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:44:00,480 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:44:00,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:44:00,480 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:44:00,480 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:44:00,480 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:44:00,857 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:44:00,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:44:00,899 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:44:00,901 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:44:00,902 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:44:00,903 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/mapavg4.i [2020-12-23 00:44:00,988 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/74f3ae537/d3f52f2efe434cddae6ae8e6b578ad6f/FLAG5c946ea68 [2020-12-23 00:44:01,609 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:44:01,609 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-crafted/mapavg4.i [2020-12-23 00:44:01,620 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/74f3ae537/d3f52f2efe434cddae6ae8e6b578ad6f/FLAG5c946ea68 [2020-12-23 00:44:01,992 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/74f3ae537/d3f52f2efe434cddae6ae8e6b578ad6f [2020-12-23 00:44:01,997 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:44:02,000 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:44:02,003 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:44:02,003 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:44:02,007 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:44:02,009 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:44:01" (1/1) ... [2020-12-23 00:44:02,012 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@684ca816 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:44:02, skipping insertion in model container [2020-12-23 00:44:02,013 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:44:01" (1/1) ... [2020-12-23 00:44:02,027 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:44:02,062 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IdentifierExpression[~i~1,]]] 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[99999]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2020-12-23 00:44:02,266 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-crafted/mapavg4.i[1327,1340] [2020-12-23 00:44:02,270 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:44:02,277 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~ret~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~1,]]]]] 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[399996],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2020-12-23 00:44:02,308 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-crafted/mapavg4.i[1327,1340] [2020-12-23 00:44:02,310 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:44:02,331 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:44:02,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:44:02 WrapperNode [2020-12-23 00:44:02,332 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:44:02,333 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:44:02,334 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:44:02,334 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:44:02,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:44:02" (1/1) ... [2020-12-23 00:44:02,363 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:44:02" (1/1) ... [2020-12-23 00:44:02,422 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:44:02,424 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:44:02,425 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:44:02,425 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:44:02,437 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:44:02" (1/1) ... [2020-12-23 00:44:02,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:44:02" (1/1) ... [2020-12-23 00:44:02,441 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:44:02" (1/1) ... [2020-12-23 00:44:02,441 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:44:02" (1/1) ... [2020-12-23 00:44:02,448 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:44:02" (1/1) ... [2020-12-23 00:44:02,454 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:44:02" (1/1) ... [2020-12-23 00:44:02,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:44:02" (1/1) ... [2020-12-23 00:44:02,458 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:44:02,460 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:44:02,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:44:02,460 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:44:02,461 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:44:02" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:44:02,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:44:02,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:44:02,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:44:02,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:44:02,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:44:02,577 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:44:02,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:44:03,026 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:44:03,026 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2020-12-23 00:44:03,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:44:03 BoogieIcfgContainer [2020-12-23 00:44:03,029 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:44:03,031 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:44:03,032 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:44:03,036 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:44:03,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:44:01" (1/3) ... [2020-12-23 00:44:03,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bf8b398 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:44:03, skipping insertion in model container [2020-12-23 00:44:03,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:44:02" (2/3) ... [2020-12-23 00:44:03,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bf8b398 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:44:03, skipping insertion in model container [2020-12-23 00:44:03,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:44:03" (3/3) ... [2020-12-23 00:44:03,040 INFO L111 eAbstractionObserver]: Analyzing ICFG mapavg4.i [2020-12-23 00:44:03,048 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:44:03,053 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:44:03,077 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:44:03,111 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:44:03,111 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:44:03,111 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:44:03,112 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:44:03,112 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:44:03,112 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:44:03,112 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:44:03,112 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:44:03,128 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-12-23 00:44:03,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 00:44:03,141 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:03,142 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:03,143 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:03,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:03,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1858201700, now seen corresponding path program 1 times [2020-12-23 00:44:03,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:03,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075759410] [2020-12-23 00:44:03,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:03,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:03,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:44:03,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075759410] [2020-12-23 00:44:03,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:44:03,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:44:03,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357990484] [2020-12-23 00:44:03,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:44:03,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:03,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:44:03,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:44:03,409 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2020-12-23 00:44:03,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:03,446 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2020-12-23 00:44:03,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:44:03,449 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-23 00:44:03,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:03,459 INFO L225 Difference]: With dead ends: 52 [2020-12-23 00:44:03,459 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 00:44:03,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:44:03,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 00:44:03,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-12-23 00:44:03,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 00:44:03,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-12-23 00:44:03,505 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2020-12-23 00:44:03,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:03,506 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-12-23 00:44:03,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:44:03,506 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-12-23 00:44:03,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 00:44:03,507 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:03,507 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:03,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:44:03,508 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:03,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:03,509 INFO L82 PathProgramCache]: Analyzing trace with hash 290125730, now seen corresponding path program 1 times [2020-12-23 00:44:03,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:03,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505172342] [2020-12-23 00:44:03,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:03,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:03,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:44:03,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505172342] [2020-12-23 00:44:03,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535156477] [2020-12-23 00:44:03,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:03,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:03,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-23 00:44:03,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:03,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:44:03,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:44:03,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-23 00:44:03,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525247779] [2020-12-23 00:44:03,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:44:03,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:03,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:44:03,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:44:03,821 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2020-12-23 00:44:03,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:03,864 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-12-23 00:44:03,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:44:03,864 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-23 00:44:03,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:03,865 INFO L225 Difference]: With dead ends: 46 [2020-12-23 00:44:03,866 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 00:44:03,867 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 [2020-12-23 00:44:03,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 00:44:03,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-12-23 00:44:03,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 00:44:03,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-12-23 00:44:03,873 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2020-12-23 00:44:03,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:03,874 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-12-23 00:44:03,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:44:03,874 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-12-23 00:44:03,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 00:44:03,875 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:03,875 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] [2020-12-23 00:44:04,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 00:44:04,090 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:04,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:04,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1760334112, now seen corresponding path program 1 times [2020-12-23 00:44:04,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:04,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762632187] [2020-12-23 00:44:04,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:04,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:04,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 00:44:04,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762632187] [2020-12-23 00:44:04,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80691461] [2020-12-23 00:44:04,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:04,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:04,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-23 00:44:04,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:04,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:44:04,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:44:04,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-23 00:44:04,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247147929] [2020-12-23 00:44:04,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:44:04,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:04,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:44:04,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:44:04,306 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2020-12-23 00:44:04,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:04,320 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-12-23 00:44:04,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:44:04,321 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-12-23 00:44:04,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:04,322 INFO L225 Difference]: With dead ends: 38 [2020-12-23 00:44:04,322 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 00:44:04,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:44:04,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 00:44:04,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-12-23 00:44:04,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 00:44:04,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-12-23 00:44:04,329 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2020-12-23 00:44:04,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:04,329 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-12-23 00:44:04,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:44:04,330 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-12-23 00:44:04,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 00:44:04,331 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:04,331 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:04,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:04,545 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:04,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:04,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1208457118, now seen corresponding path program 1 times [2020-12-23 00:44:04,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:04,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884539842] [2020-12-23 00:44:04,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:04,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:04,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:44:04,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884539842] [2020-12-23 00:44:04,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146710412] [2020-12-23 00:44:04,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:04,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:04,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:44:04,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:04,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:44:04,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:04,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 00:44:04,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336952793] [2020-12-23 00:44:04,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:44:04,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:04,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:44:04,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:44:04,771 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-12-23 00:44:04,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:04,801 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-12-23 00:44:04,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:44:04,802 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-12-23 00:44:04,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:04,803 INFO L225 Difference]: With dead ends: 54 [2020-12-23 00:44:04,804 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 00:44:04,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:44:04,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 00:44:04,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-12-23 00:44:04,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 00:44:04,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-12-23 00:44:04,816 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2020-12-23 00:44:04,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:04,819 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-12-23 00:44:04,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:44:04,819 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-12-23 00:44:04,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 00:44:04,820 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:04,820 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:05,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:05,022 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:05,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:05,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1993526948, now seen corresponding path program 2 times [2020-12-23 00:44:05,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:05,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824555945] [2020-12-23 00:44:05,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:05,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:05,115 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 00:44:05,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824555945] [2020-12-23 00:44:05,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434760131] [2020-12-23 00:44:05,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:05,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:44:05,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:05,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:44:05,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:05,232 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 00:44:05,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:05,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-23 00:44:05,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598213718] [2020-12-23 00:44:05,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:44:05,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:05,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:44:05,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:44:05,235 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states. [2020-12-23 00:44:05,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:05,310 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2020-12-23 00:44:05,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:44:05,310 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-12-23 00:44:05,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:05,311 INFO L225 Difference]: With dead ends: 61 [2020-12-23 00:44:05,312 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 00:44:05,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:44:05,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 00:44:05,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2020-12-23 00:44:05,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 00:44:05,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-12-23 00:44:05,319 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 29 [2020-12-23 00:44:05,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:05,319 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-12-23 00:44:05,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:44:05,320 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-12-23 00:44:05,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 00:44:05,321 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:05,321 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:05,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:05,535 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:05,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:05,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1059243608, now seen corresponding path program 3 times [2020-12-23 00:44:05,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:05,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504076534] [2020-12-23 00:44:05,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:05,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:05,691 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 00:44:05,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504076534] [2020-12-23 00:44:05,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063599047] [2020-12-23 00:44:05,692 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:05,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 00:44:05,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:05,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:44:05,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:05,946 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 00:44:05,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:05,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-23 00:44:05,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561295384] [2020-12-23 00:44:05,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:44:05,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:05,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:44:05,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:44:05,949 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 8 states. [2020-12-23 00:44:06,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:06,042 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2020-12-23 00:44:06,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:44:06,043 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-12-23 00:44:06,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:06,044 INFO L225 Difference]: With dead ends: 81 [2020-12-23 00:44:06,044 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 00:44:06,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:44:06,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 00:44:06,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-12-23 00:44:06,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 00:44:06,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-12-23 00:44:06,052 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 37 [2020-12-23 00:44:06,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:06,052 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-12-23 00:44:06,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:44:06,053 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-12-23 00:44:06,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 00:44:06,054 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:06,054 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:06,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 00:44:06,268 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:06,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:06,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1892525292, now seen corresponding path program 4 times [2020-12-23 00:44:06,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:06,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421532144] [2020-12-23 00:44:06,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:06,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:06,372 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-23 00:44:06,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421532144] [2020-12-23 00:44:06,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121968901] [2020-12-23 00:44:06,373 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:06,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:44:06,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:06,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:44:06,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:06,523 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-23 00:44:06,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:06,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 00:44:06,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404997886] [2020-12-23 00:44:06,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:44:06,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:06,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:44:06,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:44:06,527 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 7 states. [2020-12-23 00:44:06,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:06,552 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2020-12-23 00:44:06,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:44:06,553 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2020-12-23 00:44:06,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:06,554 INFO L225 Difference]: With dead ends: 86 [2020-12-23 00:44:06,554 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 00:44:06,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:44:06,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 00:44:06,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-12-23 00:44:06,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 00:44:06,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-12-23 00:44:06,561 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 45 [2020-12-23 00:44:06,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:06,562 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-12-23 00:44:06,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:44:06,562 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-12-23 00:44:06,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 00:44:06,563 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:06,563 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:06,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:06,777 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:06,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:06,778 INFO L82 PathProgramCache]: Analyzing trace with hash 704135506, now seen corresponding path program 5 times [2020-12-23 00:44:06,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:06,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96110707] [2020-12-23 00:44:06,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:06,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:06,874 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-23 00:44:06,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96110707] [2020-12-23 00:44:06,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629432001] [2020-12-23 00:44:06,875 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:06,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 00:44:06,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:06,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:44:06,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-23 00:44:07,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:07,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-12-23 00:44:07,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017702613] [2020-12-23 00:44:07,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:44:07,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:07,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:44:07,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:44:07,082 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 11 states. [2020-12-23 00:44:07,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:07,193 INFO L93 Difference]: Finished difference Result 97 states and 108 transitions. [2020-12-23 00:44:07,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:44:07,194 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2020-12-23 00:44:07,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:07,195 INFO L225 Difference]: With dead ends: 97 [2020-12-23 00:44:07,195 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 00:44:07,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:44:07,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 00:44:07,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2020-12-23 00:44:07,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 00:44:07,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-12-23 00:44:07,203 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 47 [2020-12-23 00:44:07,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:07,203 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-12-23 00:44:07,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:44:07,203 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-12-23 00:44:07,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-23 00:44:07,204 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:07,204 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:07,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:07,419 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:07,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:07,420 INFO L82 PathProgramCache]: Analyzing trace with hash -788382450, now seen corresponding path program 6 times [2020-12-23 00:44:07,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:07,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143161032] [2020-12-23 00:44:07,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:07,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:07,541 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-12-23 00:44:07,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143161032] [2020-12-23 00:44:07,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69923509] [2020-12-23 00:44:07,545 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:07,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 00:44:07,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:07,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:44:07,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:07,932 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-12-23 00:44:07,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:07,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2020-12-23 00:44:07,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860915396] [2020-12-23 00:44:07,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:44:07,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:07,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:44:07,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:44:07,935 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 11 states. [2020-12-23 00:44:07,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:07,990 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2020-12-23 00:44:07,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:44:07,991 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-12-23 00:44:07,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:07,992 INFO L225 Difference]: With dead ends: 105 [2020-12-23 00:44:07,992 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 00:44:07,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:44:07,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 00:44:07,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2020-12-23 00:44:07,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 00:44:07,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2020-12-23 00:44:08,000 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 55 [2020-12-23 00:44:08,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:08,000 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2020-12-23 00:44:08,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:44:08,000 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2020-12-23 00:44:08,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-23 00:44:08,001 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:08,002 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:08,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 00:44:08,216 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:08,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:08,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1118484150, now seen corresponding path program 7 times [2020-12-23 00:44:08,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:08,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204735704] [2020-12-23 00:44:08,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:08,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:08,329 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 00:44:08,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204735704] [2020-12-23 00:44:08,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932239906] [2020-12-23 00:44:08,330 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:08,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:08,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:44:08,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:08,486 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 00:44:08,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:08,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 00:44:08,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527390580] [2020-12-23 00:44:08,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:44:08,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:08,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:44:08,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:44:08,489 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 10 states. [2020-12-23 00:44:08,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:08,527 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2020-12-23 00:44:08,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:44:08,528 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-12-23 00:44:08,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:08,529 INFO L225 Difference]: With dead ends: 108 [2020-12-23 00:44:08,529 INFO L226 Difference]: Without dead ends: 63 [2020-12-23 00:44:08,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:44:08,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-23 00:44:08,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-12-23 00:44:08,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-23 00:44:08,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-12-23 00:44:08,537 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 59 [2020-12-23 00:44:08,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:08,537 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-12-23 00:44:08,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:44:08,538 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-12-23 00:44:08,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-23 00:44:08,539 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:08,539 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:08,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:08,755 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:08,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:08,756 INFO L82 PathProgramCache]: Analyzing trace with hash 2146724616, now seen corresponding path program 8 times [2020-12-23 00:44:08,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:08,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720085148] [2020-12-23 00:44:08,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:08,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:08,942 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 00:44:08,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720085148] [2020-12-23 00:44:08,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243152405] [2020-12-23 00:44:08,943 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 [2020-12-23 00:44:09,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:44:09,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:09,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:44:09,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:09,106 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 00:44:09,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:09,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 00:44:09,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833772904] [2020-12-23 00:44:09,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:44:09,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:09,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:44:09,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:44:09,109 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 11 states. [2020-12-23 00:44:09,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:09,143 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2020-12-23 00:44:09,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:44:09,143 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2020-12-23 00:44:09,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:09,144 INFO L225 Difference]: With dead ends: 110 [2020-12-23 00:44:09,144 INFO L226 Difference]: Without dead ends: 65 [2020-12-23 00:44:09,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:44:09,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-23 00:44:09,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-12-23 00:44:09,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 00:44:09,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2020-12-23 00:44:09,151 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 61 [2020-12-23 00:44:09,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:09,152 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2020-12-23 00:44:09,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:44:09,152 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2020-12-23 00:44:09,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 00:44:09,153 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:09,153 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:09,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:09,367 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:09,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:09,368 INFO L82 PathProgramCache]: Analyzing trace with hash 391255366, now seen corresponding path program 9 times [2020-12-23 00:44:09,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:09,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093095525] [2020-12-23 00:44:09,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:09,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:09,529 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 00:44:09,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093095525] [2020-12-23 00:44:09,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512276416] [2020-12-23 00:44:09,530 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 [2020-12-23 00:44:09,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 00:44:09,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:09,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:44:09,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:09,853 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-12-23 00:44:09,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:09,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2020-12-23 00:44:09,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825077104] [2020-12-23 00:44:09,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 00:44:09,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:09,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 00:44:09,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:44:09,856 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 15 states. [2020-12-23 00:44:09,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:09,941 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2020-12-23 00:44:09,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 00:44:09,942 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2020-12-23 00:44:09,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:09,943 INFO L225 Difference]: With dead ends: 115 [2020-12-23 00:44:09,943 INFO L226 Difference]: Without dead ends: 70 [2020-12-23 00:44:09,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:44:09,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-23 00:44:09,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2020-12-23 00:44:09,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-23 00:44:09,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-12-23 00:44:09,967 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 63 [2020-12-23 00:44:09,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:09,967 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-12-23 00:44:09,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 00:44:09,967 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-12-23 00:44:09,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-23 00:44:09,968 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:09,968 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:10,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 00:44:10,183 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:10,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:10,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1743137406, now seen corresponding path program 10 times [2020-12-23 00:44:10,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:10,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340425426] [2020-12-23 00:44:10,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:10,353 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 00:44:10,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340425426] [2020-12-23 00:44:10,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187397287] [2020-12-23 00:44:10,353 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:10,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:44:10,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:10,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:44:10,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:10,505 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 00:44:10,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:10,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 00:44:10,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545778039] [2020-12-23 00:44:10,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:44:10,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:10,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:44:10,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:44:10,508 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 13 states. [2020-12-23 00:44:10,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:10,552 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2020-12-23 00:44:10,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:44:10,553 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2020-12-23 00:44:10,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:10,553 INFO L225 Difference]: With dead ends: 118 [2020-12-23 00:44:10,554 INFO L226 Difference]: Without dead ends: 71 [2020-12-23 00:44:10,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:44:10,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-23 00:44:10,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-12-23 00:44:10,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-23 00:44:10,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-12-23 00:44:10,559 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 67 [2020-12-23 00:44:10,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:10,559 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-12-23 00:44:10,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:44:10,560 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-12-23 00:44:10,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-23 00:44:10,561 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:10,561 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:10,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 00:44:10,777 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:10,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:10,778 INFO L82 PathProgramCache]: Analyzing trace with hash 684874048, now seen corresponding path program 11 times [2020-12-23 00:44:10,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:10,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444141022] [2020-12-23 00:44:10,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:10,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:10,929 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 00:44:10,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444141022] [2020-12-23 00:44:10,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224909342] [2020-12-23 00:44:10,930 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:11,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-23 00:44:11,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:11,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:44:11,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:11,430 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 00:44:11,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:11,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 00:44:11,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541905908] [2020-12-23 00:44:11,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 00:44:11,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:11,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 00:44:11,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:44:11,433 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 14 states. [2020-12-23 00:44:11,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:11,485 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2020-12-23 00:44:11,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 00:44:11,486 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2020-12-23 00:44:11,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:11,487 INFO L225 Difference]: With dead ends: 120 [2020-12-23 00:44:11,487 INFO L226 Difference]: Without dead ends: 73 [2020-12-23 00:44:11,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:44:11,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-23 00:44:11,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-12-23 00:44:11,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 00:44:11,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2020-12-23 00:44:11,493 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 69 [2020-12-23 00:44:11,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:11,493 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2020-12-23 00:44:11,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 00:44:11,494 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2020-12-23 00:44:11,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-23 00:44:11,495 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:11,495 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:11,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 00:44:11,710 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:11,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:11,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1836639614, now seen corresponding path program 12 times [2020-12-23 00:44:11,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:11,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708494940] [2020-12-23 00:44:11,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:11,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:11,866 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-23 00:44:11,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708494940] [2020-12-23 00:44:11,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717044324] [2020-12-23 00:44:11,867 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:12,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-23 00:44:12,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:12,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:44:12,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:12,577 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-23 00:44:12,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:12,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2020-12-23 00:44:12,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898291074] [2020-12-23 00:44:12,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 00:44:12,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:12,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 00:44:12,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:44:12,580 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 19 states. [2020-12-23 00:44:12,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:12,676 INFO L93 Difference]: Finished difference Result 125 states and 134 transitions. [2020-12-23 00:44:12,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 00:44:12,677 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 71 [2020-12-23 00:44:12,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:12,678 INFO L225 Difference]: With dead ends: 125 [2020-12-23 00:44:12,678 INFO L226 Difference]: Without dead ends: 78 [2020-12-23 00:44:12,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:44:12,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-23 00:44:12,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-12-23 00:44:12,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 00:44:12,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2020-12-23 00:44:12,689 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 71 [2020-12-23 00:44:12,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:12,689 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2020-12-23 00:44:12,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 00:44:12,689 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2020-12-23 00:44:12,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-23 00:44:12,690 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:12,690 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:12,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:12,906 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:12,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:12,907 INFO L82 PathProgramCache]: Analyzing trace with hash 970283450, now seen corresponding path program 13 times [2020-12-23 00:44:12,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:12,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416593633] [2020-12-23 00:44:12,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:12,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:13,104 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-12-23 00:44:13,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416593633] [2020-12-23 00:44:13,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935231939] [2020-12-23 00:44:13,107 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:13,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:13,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 00:44:13,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:13,297 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-12-23 00:44:13,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:13,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 00:44:13,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546986417] [2020-12-23 00:44:13,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 00:44:13,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:13,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 00:44:13,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:44:13,301 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 16 states. [2020-12-23 00:44:13,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:13,355 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2020-12-23 00:44:13,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 00:44:13,356 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 75 [2020-12-23 00:44:13,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:13,357 INFO L225 Difference]: With dead ends: 128 [2020-12-23 00:44:13,357 INFO L226 Difference]: Without dead ends: 79 [2020-12-23 00:44:13,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:44:13,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-23 00:44:13,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-12-23 00:44:13,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-23 00:44:13,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2020-12-23 00:44:13,363 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 75 [2020-12-23 00:44:13,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:13,364 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2020-12-23 00:44:13,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 00:44:13,364 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2020-12-23 00:44:13,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-23 00:44:13,365 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:13,365 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:13,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 00:44:13,580 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:13,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:13,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1574617224, now seen corresponding path program 14 times [2020-12-23 00:44:13,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:13,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981025307] [2020-12-23 00:44:13,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:13,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:13,761 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-12-23 00:44:13,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981025307] [2020-12-23 00:44:13,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032398188] [2020-12-23 00:44:13,762 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:13,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:44:13,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:13,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 00:44:13,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:13,967 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-12-23 00:44:13,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:13,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 00:44:13,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66922746] [2020-12-23 00:44:13,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 00:44:13,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:13,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 00:44:13,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:44:13,979 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 17 states. [2020-12-23 00:44:14,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:14,036 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2020-12-23 00:44:14,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 00:44:14,036 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 77 [2020-12-23 00:44:14,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:14,038 INFO L225 Difference]: With dead ends: 130 [2020-12-23 00:44:14,038 INFO L226 Difference]: Without dead ends: 81 [2020-12-23 00:44:14,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:44:14,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-23 00:44:14,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-12-23 00:44:14,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-23 00:44:14,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2020-12-23 00:44:14,045 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 77 [2020-12-23 00:44:14,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:14,046 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2020-12-23 00:44:14,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 00:44:14,046 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2020-12-23 00:44:14,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-23 00:44:14,047 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:14,047 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:14,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 00:44:14,260 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:14,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:14,261 INFO L82 PathProgramCache]: Analyzing trace with hash 907193782, now seen corresponding path program 15 times [2020-12-23 00:44:14,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:14,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004699202] [2020-12-23 00:44:14,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:14,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:14,490 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-12-23 00:44:14,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004699202] [2020-12-23 00:44:14,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201029467] [2020-12-23 00:44:14,491 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 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 [2020-12-23 00:44:14,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 00:44:14,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:14,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:44:14,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:15,035 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-12-23 00:44:15,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:15,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7] total 22 [2020-12-23 00:44:15,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318439157] [2020-12-23 00:44:15,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 00:44:15,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:15,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 00:44:15,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:44:15,038 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 22 states. [2020-12-23 00:44:15,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:15,232 INFO L93 Difference]: Finished difference Result 141 states and 152 transitions. [2020-12-23 00:44:15,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 00:44:15,233 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 79 [2020-12-23 00:44:15,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:15,233 INFO L225 Difference]: With dead ends: 141 [2020-12-23 00:44:15,234 INFO L226 Difference]: Without dead ends: 92 [2020-12-23 00:44:15,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:44:15,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-23 00:44:15,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2020-12-23 00:44:15,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-23 00:44:15,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2020-12-23 00:44:15,239 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 79 [2020-12-23 00:44:15,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:15,239 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2020-12-23 00:44:15,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 00:44:15,239 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2020-12-23 00:44:15,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-23 00:44:15,240 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:15,240 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:15,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 00:44:15,453 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:15,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:15,454 INFO L82 PathProgramCache]: Analyzing trace with hash -457297038, now seen corresponding path program 16 times [2020-12-23 00:44:15,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:15,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312183613] [2020-12-23 00:44:15,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:15,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:15,677 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 00:44:15,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312183613] [2020-12-23 00:44:15,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352855988] [2020-12-23 00:44:15,678 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 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 [2020-12-23 00:44:15,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:44:15,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:15,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 00:44:15,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:15,912 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 00:44:15,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:15,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 00:44:15,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780031900] [2020-12-23 00:44:15,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 00:44:15,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:15,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 00:44:15,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:44:15,916 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 19 states. [2020-12-23 00:44:15,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:15,982 INFO L93 Difference]: Finished difference Result 146 states and 154 transitions. [2020-12-23 00:44:15,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 00:44:15,982 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 87 [2020-12-23 00:44:15,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:15,983 INFO L225 Difference]: With dead ends: 146 [2020-12-23 00:44:15,983 INFO L226 Difference]: Without dead ends: 91 [2020-12-23 00:44:15,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:44:15,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-23 00:44:15,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-12-23 00:44:15,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-23 00:44:15,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2020-12-23 00:44:15,988 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 87 [2020-12-23 00:44:15,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:15,988 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2020-12-23 00:44:15,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 00:44:15,988 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2020-12-23 00:44:15,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-23 00:44:15,994 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:15,994 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:16,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:16,208 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:16,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:16,208 INFO L82 PathProgramCache]: Analyzing trace with hash -2002949072, now seen corresponding path program 17 times [2020-12-23 00:44:16,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:16,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826511369] [2020-12-23 00:44:16,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:16,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:16,534 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 00:44:16,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826511369] [2020-12-23 00:44:16,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903603317] [2020-12-23 00:44:16,535 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 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 [2020-12-23 00:44:17,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-12-23 00:44:17,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:17,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 00:44:17,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:17,311 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 00:44:17,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:17,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 00:44:17,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556393630] [2020-12-23 00:44:17,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 00:44:17,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:17,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 00:44:17,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:44:17,313 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand 20 states. [2020-12-23 00:44:17,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:17,376 INFO L93 Difference]: Finished difference Result 148 states and 156 transitions. [2020-12-23 00:44:17,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 00:44:17,377 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 89 [2020-12-23 00:44:17,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:17,378 INFO L225 Difference]: With dead ends: 148 [2020-12-23 00:44:17,378 INFO L226 Difference]: Without dead ends: 93 [2020-12-23 00:44:17,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:44:17,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-23 00:44:17,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-12-23 00:44:17,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 00:44:17,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2020-12-23 00:44:17,384 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 89 [2020-12-23 00:44:17,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:17,384 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2020-12-23 00:44:17,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 00:44:17,384 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2020-12-23 00:44:17,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-23 00:44:17,385 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:17,385 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:17,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:17,598 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:17,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:17,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1315869330, now seen corresponding path program 18 times [2020-12-23 00:44:17,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:17,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201449353] [2020-12-23 00:44:17,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:17,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:17,870 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 00:44:17,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201449353] [2020-12-23 00:44:17,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109516501] [2020-12-23 00:44:17,871 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 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 [2020-12-23 00:44:18,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-23 00:44:18,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:18,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:44:18,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:18,506 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-12-23 00:44:18,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:18,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 26 [2020-12-23 00:44:18,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325058825] [2020-12-23 00:44:18,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 00:44:18,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:18,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 00:44:18,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:44:18,509 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 26 states. [2020-12-23 00:44:18,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:18,692 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2020-12-23 00:44:18,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 00:44:18,693 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 91 [2020-12-23 00:44:18,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:18,694 INFO L225 Difference]: With dead ends: 159 [2020-12-23 00:44:18,694 INFO L226 Difference]: Without dead ends: 104 [2020-12-23 00:44:18,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:44:18,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-23 00:44:18,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2020-12-23 00:44:18,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-23 00:44:18,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2020-12-23 00:44:18,699 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 91 [2020-12-23 00:44:18,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:18,700 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2020-12-23 00:44:18,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 00:44:18,700 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2020-12-23 00:44:18,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-23 00:44:18,701 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:18,701 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 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] [2020-12-23 00:44:18,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 00:44:18,917 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:18,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:18,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1310358570, now seen corresponding path program 19 times [2020-12-23 00:44:18,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:18,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030713972] [2020-12-23 00:44:18,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:18,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:19,196 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-23 00:44:19,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030713972] [2020-12-23 00:44:19,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497956110] [2020-12-23 00:44:19,197 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 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 [2020-12-23 00:44:19,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:19,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 00:44:19,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:19,517 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-23 00:44:19,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:19,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 00:44:19,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701694424] [2020-12-23 00:44:19,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 00:44:19,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:19,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 00:44:19,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:44:19,521 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 22 states. [2020-12-23 00:44:19,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:19,618 INFO L93 Difference]: Finished difference Result 164 states and 172 transitions. [2020-12-23 00:44:19,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 00:44:19,618 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 99 [2020-12-23 00:44:19,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:19,619 INFO L225 Difference]: With dead ends: 164 [2020-12-23 00:44:19,619 INFO L226 Difference]: Without dead ends: 103 [2020-12-23 00:44:19,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:44:19,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-23 00:44:19,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-12-23 00:44:19,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-23 00:44:19,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2020-12-23 00:44:19,625 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 99 [2020-12-23 00:44:19,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:19,625 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2020-12-23 00:44:19,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 00:44:19,625 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2020-12-23 00:44:19,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-23 00:44:19,626 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:19,626 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 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] [2020-12-23 00:44:19,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 00:44:19,840 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:19,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:19,841 INFO L82 PathProgramCache]: Analyzing trace with hash -903575576, now seen corresponding path program 20 times [2020-12-23 00:44:19,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:19,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325446477] [2020-12-23 00:44:19,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:19,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:20,152 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-23 00:44:20,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325446477] [2020-12-23 00:44:20,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410629957] [2020-12-23 00:44:20,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:20,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:44:20,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:20,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 00:44:20,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:20,400 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-23 00:44:20,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:20,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 00:44:20,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522777563] [2020-12-23 00:44:20,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 00:44:20,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:20,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 00:44:20,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:44:20,402 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand 23 states. [2020-12-23 00:44:20,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:20,486 INFO L93 Difference]: Finished difference Result 166 states and 174 transitions. [2020-12-23 00:44:20,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 00:44:20,487 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 101 [2020-12-23 00:44:20,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:20,488 INFO L225 Difference]: With dead ends: 166 [2020-12-23 00:44:20,488 INFO L226 Difference]: Without dead ends: 105 [2020-12-23 00:44:20,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:44:20,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-23 00:44:20,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-12-23 00:44:20,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-23 00:44:20,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2020-12-23 00:44:20,495 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 101 [2020-12-23 00:44:20,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:20,495 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2020-12-23 00:44:20,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 00:44:20,495 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2020-12-23 00:44:20,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-23 00:44:20,496 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:20,497 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 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] [2020-12-23 00:44:20,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:20,710 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:20,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:20,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1809488934, now seen corresponding path program 21 times [2020-12-23 00:44:20,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:20,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727964479] [2020-12-23 00:44:20,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:20,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:21,049 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-23 00:44:21,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727964479] [2020-12-23 00:44:21,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939755092] [2020-12-23 00:44:21,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:21,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 00:44:21,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:21,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:44:21,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:21,688 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2020-12-23 00:44:21,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:21,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 8] total 29 [2020-12-23 00:44:21,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198119982] [2020-12-23 00:44:21,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 00:44:21,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:21,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 00:44:21,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:44:21,691 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand 29 states. [2020-12-23 00:44:21,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:21,835 INFO L93 Difference]: Finished difference Result 171 states and 180 transitions. [2020-12-23 00:44:21,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 00:44:21,835 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 103 [2020-12-23 00:44:21,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:21,836 INFO L225 Difference]: With dead ends: 171 [2020-12-23 00:44:21,836 INFO L226 Difference]: Without dead ends: 110 [2020-12-23 00:44:21,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:44:21,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-23 00:44:21,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2020-12-23 00:44:21,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-23 00:44:21,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2020-12-23 00:44:21,843 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 103 [2020-12-23 00:44:21,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:21,843 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2020-12-23 00:44:21,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 00:44:21,843 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2020-12-23 00:44:21,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-23 00:44:21,844 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:21,845 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 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] [2020-12-23 00:44:22,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 00:44:22,061 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:22,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:22,062 INFO L82 PathProgramCache]: Analyzing trace with hash 676687458, now seen corresponding path program 22 times [2020-12-23 00:44:22,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:22,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826545530] [2020-12-23 00:44:22,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:22,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:22,487 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-23 00:44:22,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826545530] [2020-12-23 00:44:22,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393615393] [2020-12-23 00:44:22,487 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 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 [2020-12-23 00:44:22,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:44:22,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:22,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:44:22,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:22,843 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2020-12-23 00:44:22,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:22,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 9] total 31 [2020-12-23 00:44:22,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553650087] [2020-12-23 00:44:22,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 00:44:22,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:22,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 00:44:22,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-12-23 00:44:22,847 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 31 states. [2020-12-23 00:44:22,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:22,966 INFO L93 Difference]: Finished difference Result 177 states and 186 transitions. [2020-12-23 00:44:22,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 00:44:22,967 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 107 [2020-12-23 00:44:22,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:22,968 INFO L225 Difference]: With dead ends: 177 [2020-12-23 00:44:22,968 INFO L226 Difference]: Without dead ends: 114 [2020-12-23 00:44:22,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-12-23 00:44:22,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-23 00:44:22,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-12-23 00:44:22,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-23 00:44:22,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2020-12-23 00:44:22,973 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 107 [2020-12-23 00:44:22,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:22,974 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2020-12-23 00:44:22,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 00:44:22,974 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2020-12-23 00:44:22,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-23 00:44:22,975 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:22,975 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:23,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:23,190 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:23,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:23,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1973169506, now seen corresponding path program 23 times [2020-12-23 00:44:23,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:23,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617266646] [2020-12-23 00:44:23,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:23,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:23,592 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2020-12-23 00:44:23,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617266646] [2020-12-23 00:44:23,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171960226] [2020-12-23 00:44:23,593 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 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 [2020-12-23 00:44:25,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2020-12-23 00:44:25,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:25,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:44:25,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:25,928 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2020-12-23 00:44:25,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:25,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 32 [2020-12-23 00:44:25,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967410691] [2020-12-23 00:44:25,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 00:44:25,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:25,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 00:44:25,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:44:25,930 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 32 states. [2020-12-23 00:44:26,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:26,178 INFO L93 Difference]: Finished difference Result 189 states and 200 transitions. [2020-12-23 00:44:26,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 00:44:26,178 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 111 [2020-12-23 00:44:26,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:26,179 INFO L225 Difference]: With dead ends: 189 [2020-12-23 00:44:26,180 INFO L226 Difference]: Without dead ends: 124 [2020-12-23 00:44:26,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:44:26,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-23 00:44:26,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2020-12-23 00:44:26,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-23 00:44:26,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2020-12-23 00:44:26,186 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 111 [2020-12-23 00:44:26,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:26,186 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2020-12-23 00:44:26,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 00:44:26,186 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2020-12-23 00:44:26,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-23 00:44:26,187 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:26,188 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:26,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 00:44:26,402 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:26,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:26,403 INFO L82 PathProgramCache]: Analyzing trace with hash 41685082, now seen corresponding path program 24 times [2020-12-23 00:44:26,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:26,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478567198] [2020-12-23 00:44:26,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:26,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:26,851 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-12-23 00:44:26,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478567198] [2020-12-23 00:44:26,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344580834] [2020-12-23 00:44:26,852 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 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 [2020-12-23 00:44:28,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-12-23 00:44:28,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:28,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:44:28,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:28,602 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-12-23 00:44:28,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:28,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 10] total 34 [2020-12-23 00:44:28,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392103223] [2020-12-23 00:44:28,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 00:44:28,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:28,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 00:44:28,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=753, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:44:28,604 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand 34 states. [2020-12-23 00:44:28,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:28,801 INFO L93 Difference]: Finished difference Result 203 states and 214 transitions. [2020-12-23 00:44:28,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 00:44:28,802 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 119 [2020-12-23 00:44:28,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:28,803 INFO L225 Difference]: With dead ends: 203 [2020-12-23 00:44:28,803 INFO L226 Difference]: Without dead ends: 132 [2020-12-23 00:44:28,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=369, Invalid=753, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:44:28,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-23 00:44:28,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 128. [2020-12-23 00:44:28,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-12-23 00:44:28,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2020-12-23 00:44:28,809 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 119 [2020-12-23 00:44:28,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:28,809 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2020-12-23 00:44:28,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 00:44:28,810 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2020-12-23 00:44:28,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-23 00:44:28,811 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:28,811 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:29,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 00:44:29,026 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:29,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:29,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1061851926, now seen corresponding path program 25 times [2020-12-23 00:44:29,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:29,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420597751] [2020-12-23 00:44:29,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:29,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:29,478 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2020-12-23 00:44:29,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420597751] [2020-12-23 00:44:29,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688664262] [2020-12-23 00:44:29,479 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 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 [2020-12-23 00:44:29,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:29,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 00:44:29,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:29,737 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2020-12-23 00:44:29,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:29,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-23 00:44:29,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748330266] [2020-12-23 00:44:29,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 00:44:29,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:29,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 00:44:29,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:44:29,740 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand 28 states. [2020-12-23 00:44:29,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:29,839 INFO L93 Difference]: Finished difference Result 208 states and 216 transitions. [2020-12-23 00:44:29,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 00:44:29,839 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 127 [2020-12-23 00:44:29,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:29,840 INFO L225 Difference]: With dead ends: 208 [2020-12-23 00:44:29,840 INFO L226 Difference]: Without dead ends: 131 [2020-12-23 00:44:29,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:44:29,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-12-23 00:44:29,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2020-12-23 00:44:29,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-12-23 00:44:29,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2020-12-23 00:44:29,846 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 127 [2020-12-23 00:44:29,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:29,846 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2020-12-23 00:44:29,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 00:44:29,847 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2020-12-23 00:44:29,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-23 00:44:29,848 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:29,848 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:30,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 00:44:30,064 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:30,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:30,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1066289708, now seen corresponding path program 26 times [2020-12-23 00:44:30,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:30,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636829181] [2020-12-23 00:44:30,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:30,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:30,599 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2020-12-23 00:44:30,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636829181] [2020-12-23 00:44:30,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469912085] [2020-12-23 00:44:30,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:30,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:44:30,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:30,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 00:44:30,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:30,906 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2020-12-23 00:44:30,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:30,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-23 00:44:30,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624204172] [2020-12-23 00:44:30,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 00:44:30,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:30,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 00:44:30,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:44:30,908 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand 29 states. [2020-12-23 00:44:31,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:31,017 INFO L93 Difference]: Finished difference Result 210 states and 218 transitions. [2020-12-23 00:44:31,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 00:44:31,018 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 129 [2020-12-23 00:44:31,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:31,019 INFO L225 Difference]: With dead ends: 210 [2020-12-23 00:44:31,019 INFO L226 Difference]: Without dead ends: 133 [2020-12-23 00:44:31,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:44:31,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-23 00:44:31,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2020-12-23 00:44:31,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-23 00:44:31,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 136 transitions. [2020-12-23 00:44:31,026 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 136 transitions. Word has length 129 [2020-12-23 00:44:31,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:31,027 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 136 transitions. [2020-12-23 00:44:31,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 00:44:31,027 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 136 transitions. [2020-12-23 00:44:31,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-23 00:44:31,028 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:31,028 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:31,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 00:44:31,243 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:31,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:31,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1805967086, now seen corresponding path program 27 times [2020-12-23 00:44:31,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:31,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507754343] [2020-12-23 00:44:31,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:31,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:31,752 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2020-12-23 00:44:31,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507754343] [2020-12-23 00:44:31,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592542251] [2020-12-23 00:44:31,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:32,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-23 00:44:32,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:32,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:44:32,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:32,707 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 868 trivial. 0 not checked. [2020-12-23 00:44:32,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:32,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 10] total 37 [2020-12-23 00:44:32,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069341927] [2020-12-23 00:44:32,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 00:44:32,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:32,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 00:44:32,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=882, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 00:44:32,711 INFO L87 Difference]: Start difference. First operand 132 states and 136 transitions. Second operand 37 states. [2020-12-23 00:44:32,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:32,928 INFO L93 Difference]: Finished difference Result 215 states and 224 transitions. [2020-12-23 00:44:32,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 00:44:32,934 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 131 [2020-12-23 00:44:32,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:32,935 INFO L225 Difference]: With dead ends: 215 [2020-12-23 00:44:32,935 INFO L226 Difference]: Without dead ends: 138 [2020-12-23 00:44:32,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=450, Invalid=882, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 00:44:32,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-23 00:44:32,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-12-23 00:44:32,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-23 00:44:32,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2020-12-23 00:44:32,948 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 131 [2020-12-23 00:44:32,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:32,948 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2020-12-23 00:44:32,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 00:44:32,948 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2020-12-23 00:44:32,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-23 00:44:32,949 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:32,949 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:33,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:33,163 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:33,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:33,164 INFO L82 PathProgramCache]: Analyzing trace with hash 523116366, now seen corresponding path program 28 times [2020-12-23 00:44:33,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:33,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068645447] [2020-12-23 00:44:33,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:33,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:33,773 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-23 00:44:33,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068645447] [2020-12-23 00:44:33,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027911690] [2020-12-23 00:44:33,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:33,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:44:33,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:44:33,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 00:44:33,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:44:34,079 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-23 00:44:34,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:44:34,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-23 00:44:34,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277422433] [2020-12-23 00:44:34,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 00:44:34,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:44:34,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 00:44:34,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 00:44:34,081 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand 31 states. [2020-12-23 00:44:34,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:44:34,192 INFO L93 Difference]: Finished difference Result 218 states and 226 transitions. [2020-12-23 00:44:34,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 00:44:34,192 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 135 [2020-12-23 00:44:34,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:44:34,193 INFO L225 Difference]: With dead ends: 218 [2020-12-23 00:44:34,194 INFO L226 Difference]: Without dead ends: 139 [2020-12-23 00:44:34,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 00:44:34,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-12-23 00:44:34,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2020-12-23 00:44:34,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-12-23 00:44:34,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2020-12-23 00:44:34,199 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 135 [2020-12-23 00:44:34,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:44:34,200 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2020-12-23 00:44:34,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 00:44:34,200 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2020-12-23 00:44:34,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-12-23 00:44:34,201 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:44:34,201 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:44:34,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:44:34,416 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:44:34,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:44:34,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1428315124, now seen corresponding path program 29 times [2020-12-23 00:44:34,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:44:34,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280965945] [2020-12-23 00:44:34,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:44:34,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:44:35,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-23 00:44:35,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280965945] [2020-12-23 00:44:35,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992539441] [2020-12-23 00:44:35,083 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:45:07,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2020-12-23 00:45:07,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:45:07,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:45:07,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:45:08,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 976 trivial. 0 not checked. [2020-12-23 00:45:08,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:45:08,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 11] total 40 [2020-12-23 00:45:08,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775950418] [2020-12-23 00:45:08,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 00:45:08,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:45:08,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 00:45:08,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:45:08,294 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand 40 states. [2020-12-23 00:45:08,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:45:08,528 INFO L93 Difference]: Finished difference Result 223 states and 232 transitions. [2020-12-23 00:45:08,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 00:45:08,529 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 137 [2020-12-23 00:45:08,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:45:08,530 INFO L225 Difference]: With dead ends: 223 [2020-12-23 00:45:08,530 INFO L226 Difference]: Without dead ends: 144 [2020-12-23 00:45:08,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:45:08,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-23 00:45:08,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2020-12-23 00:45:08,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-23 00:45:08,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2020-12-23 00:45:08,539 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 137 [2020-12-23 00:45:08,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:45:08,540 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2020-12-23 00:45:08,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 00:45:08,540 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2020-12-23 00:45:08,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-23 00:45:08,541 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:45:08,541 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:45:08,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:45:08,754 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:45:08,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:45:08,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1798907208, now seen corresponding path program 30 times [2020-12-23 00:45:08,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:45:08,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157068714] [2020-12-23 00:45:08,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:45:08,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:45:09,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2020-12-23 00:45:09,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157068714] [2020-12-23 00:45:09,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753621393] [2020-12-23 00:45:09,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:45:12,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-12-23 00:45:12,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:45:12,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:45:12,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:45:13,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2020-12-23 00:45:13,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:45:13,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 11] total 41 [2020-12-23 00:45:13,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641994612] [2020-12-23 00:45:13,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 00:45:13,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:45:13,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 00:45:13,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=1090, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 00:45:13,023 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand 41 states. [2020-12-23 00:45:13,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:45:13,405 INFO L93 Difference]: Finished difference Result 235 states and 246 transitions. [2020-12-23 00:45:13,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 00:45:13,405 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 141 [2020-12-23 00:45:13,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:45:13,407 INFO L225 Difference]: With dead ends: 235 [2020-12-23 00:45:13,407 INFO L226 Difference]: Without dead ends: 154 [2020-12-23 00:45:13,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=550, Invalid=1090, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 00:45:13,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-12-23 00:45:13,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2020-12-23 00:45:13,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-23 00:45:13,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 154 transitions. [2020-12-23 00:45:13,413 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 154 transitions. Word has length 141 [2020-12-23 00:45:13,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:45:13,413 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 154 transitions. [2020-12-23 00:45:13,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 00:45:13,413 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 154 transitions. [2020-12-23 00:45:13,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-23 00:45:13,414 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:45:13,414 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:45:13,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 00:45:13,624 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:45:13,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:45:13,625 INFO L82 PathProgramCache]: Analyzing trace with hash 308754692, now seen corresponding path program 31 times [2020-12-23 00:45:13,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:45:13,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412892302] [2020-12-23 00:45:13,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:45:13,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:45:14,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-23 00:45:14,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412892302] [2020-12-23 00:45:14,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138651453] [2020-12-23 00:45:14,365 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 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 [2020-12-23 00:45:14,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:45:14,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 00:45:14,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:45:14,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-23 00:45:14,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:45:14,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-23 00:45:14,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174250732] [2020-12-23 00:45:14,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 00:45:14,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:45:14,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 00:45:14,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:45:14,642 INFO L87 Difference]: Start difference. First operand 150 states and 154 transitions. Second operand 34 states. [2020-12-23 00:45:14,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:45:14,766 INFO L93 Difference]: Finished difference Result 240 states and 248 transitions. [2020-12-23 00:45:14,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 00:45:14,770 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 149 [2020-12-23 00:45:14,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:45:14,771 INFO L225 Difference]: With dead ends: 240 [2020-12-23 00:45:14,772 INFO L226 Difference]: Without dead ends: 153 [2020-12-23 00:45:14,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:45:14,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-12-23 00:45:14,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2020-12-23 00:45:14,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-12-23 00:45:14,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2020-12-23 00:45:14,777 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 149 [2020-12-23 00:45:14,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:45:14,777 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2020-12-23 00:45:14,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 00:45:14,778 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2020-12-23 00:45:14,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-23 00:45:14,778 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:45:14,779 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:45:14,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:45:14,993 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:45:14,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:45:14,993 INFO L82 PathProgramCache]: Analyzing trace with hash -747071166, now seen corresponding path program 32 times [2020-12-23 00:45:14,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:45:14,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933184284] [2020-12-23 00:45:14,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:45:15,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:45:15,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1285 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-23 00:45:15,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933184284] [2020-12-23 00:45:15,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948319337] [2020-12-23 00:45:15,745 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 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 [2020-12-23 00:45:15,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:45:15,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:45:15,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 00:45:15,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:45:16,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1285 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-23 00:45:16,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:45:16,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-23 00:45:16,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041776593] [2020-12-23 00:45:16,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 00:45:16,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:45:16,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 00:45:16,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 00:45:16,056 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand 35 states. [2020-12-23 00:45:16,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:45:16,192 INFO L93 Difference]: Finished difference Result 242 states and 250 transitions. [2020-12-23 00:45:16,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 00:45:16,193 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 151 [2020-12-23 00:45:16,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:45:16,194 INFO L225 Difference]: With dead ends: 242 [2020-12-23 00:45:16,194 INFO L226 Difference]: Without dead ends: 155 [2020-12-23 00:45:16,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 00:45:16,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-12-23 00:45:16,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2020-12-23 00:45:16,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-12-23 00:45:16,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 158 transitions. [2020-12-23 00:45:16,201 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 158 transitions. Word has length 151 [2020-12-23 00:45:16,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:45:16,201 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 158 transitions. [2020-12-23 00:45:16,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 00:45:16,202 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 158 transitions. [2020-12-23 00:45:16,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-23 00:45:16,203 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:45:16,203 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:45:16,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 00:45:16,417 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:45:16,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:45:16,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1783438848, now seen corresponding path program 33 times [2020-12-23 00:45:16,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:45:16,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579377358] [2020-12-23 00:45:16,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:45:16,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:45:17,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1348 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-23 00:45:17,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579377358] [2020-12-23 00:45:17,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245223273] [2020-12-23 00:45:17,137 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 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 [2020-12-23 00:45:18,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 00:45:18,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:45:18,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:45:18,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:45:18,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1348 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1267 trivial. 0 not checked. [2020-12-23 00:45:18,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:45:18,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 12] total 45 [2020-12-23 00:45:18,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492185632] [2020-12-23 00:45:18,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 00:45:18,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:45:18,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 00:45:18,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=660, Invalid=1320, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 00:45:18,527 INFO L87 Difference]: Start difference. First operand 154 states and 158 transitions. Second operand 45 states. [2020-12-23 00:45:18,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:45:18,937 INFO L93 Difference]: Finished difference Result 253 states and 264 transitions. [2020-12-23 00:45:18,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 00:45:18,938 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 153 [2020-12-23 00:45:18,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:45:18,940 INFO L225 Difference]: With dead ends: 253 [2020-12-23 00:45:18,940 INFO L226 Difference]: Without dead ends: 166 [2020-12-23 00:45:18,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=660, Invalid=1320, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 00:45:18,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-12-23 00:45:18,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2020-12-23 00:45:18,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-23 00:45:18,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2020-12-23 00:45:18,946 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 153 [2020-12-23 00:45:18,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:45:18,947 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2020-12-23 00:45:18,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 00:45:18,947 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2020-12-23 00:45:18,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-12-23 00:45:18,948 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:45:18,948 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:45:19,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:45:19,164 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:45:19,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:45:19,165 INFO L82 PathProgramCache]: Analyzing trace with hash 213614268, now seen corresponding path program 34 times [2020-12-23 00:45:19,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:45:19,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15572021] [2020-12-23 00:45:19,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:45:19,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:45:19,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2020-12-23 00:45:19,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15572021] [2020-12-23 00:45:19,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989352231] [2020-12-23 00:45:19,962 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 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 [2020-12-23 00:45:20,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:45:20,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:45:20,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:45:20,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:45:20,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1370 trivial. 0 not checked. [2020-12-23 00:45:20,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:45:20,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 13] total 47 [2020-12-23 00:45:20,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050967704] [2020-12-23 00:45:20,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 00:45:20,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:45:20,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 00:45:20,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=1455, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 00:45:20,606 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand 47 states. [2020-12-23 00:45:20,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:45:20,931 INFO L93 Difference]: Finished difference Result 267 states and 278 transitions. [2020-12-23 00:45:20,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 00:45:20,933 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 161 [2020-12-23 00:45:20,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:45:20,934 INFO L225 Difference]: With dead ends: 267 [2020-12-23 00:45:20,934 INFO L226 Difference]: Without dead ends: 174 [2020-12-23 00:45:20,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=707, Invalid=1455, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 00:45:20,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-12-23 00:45:20,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 170. [2020-12-23 00:45:20,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-12-23 00:45:20,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 174 transitions. [2020-12-23 00:45:20,942 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 174 transitions. Word has length 161 [2020-12-23 00:45:20,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:45:20,942 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 174 transitions. [2020-12-23 00:45:20,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 00:45:20,942 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 174 transitions. [2020-12-23 00:45:20,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-12-23 00:45:20,943 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:45:20,944 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 11, 11, 11, 11, 11, 11, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:45:21,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 00:45:21,160 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:45:21,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:45:21,161 INFO L82 PathProgramCache]: Analyzing trace with hash -628416392, now seen corresponding path program 35 times [2020-12-23 00:45:21,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:45:21,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239707634] [2020-12-23 00:45:21,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:45:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:45:22,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2020-12-23 00:45:22,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239707634] [2020-12-23 00:45:22,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324270437] [2020-12-23 00:45:22,019 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 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 [2020-12-23 00:46:19,108 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2020-12-23 00:46:19,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:46:19,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:46:19,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:46:19,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1479 trivial. 0 not checked. [2020-12-23 00:46:19,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:46:19,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 14] total 49 [2020-12-23 00:46:19,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031204333] [2020-12-23 00:46:19,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-23 00:46:19,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:46:19,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-23 00:46:19,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=756, Invalid=1596, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 00:46:19,759 INFO L87 Difference]: Start difference. First operand 170 states and 174 transitions. Second operand 49 states. [2020-12-23 00:46:20,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:46:20,225 INFO L93 Difference]: Finished difference Result 281 states and 292 transitions. [2020-12-23 00:46:20,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-23 00:46:20,225 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 169 [2020-12-23 00:46:20,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:46:20,227 INFO L225 Difference]: With dead ends: 281 [2020-12-23 00:46:20,227 INFO L226 Difference]: Without dead ends: 182 [2020-12-23 00:46:20,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=756, Invalid=1596, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 00:46:20,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-12-23 00:46:20,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 178. [2020-12-23 00:46:20,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-23 00:46:20,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2020-12-23 00:46:20,235 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 169 [2020-12-23 00:46:20,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:46:20,235 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2020-12-23 00:46:20,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-23 00:46:20,235 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2020-12-23 00:46:20,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-12-23 00:46:20,236 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:46:20,237 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 12, 12, 12, 12, 12, 12, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:46:20,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 00:46:20,452 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:46:20,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:46:20,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1809286964, now seen corresponding path program 36 times [2020-12-23 00:46:20,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:46:20,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678218421] [2020-12-23 00:46:20,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:46:20,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:46:21,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1738 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2020-12-23 00:46:21,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678218421] [2020-12-23 00:46:21,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558065375] [2020-12-23 00:46:21,438 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 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 [2020-12-23 00:46:26,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 00:46:26,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:46:26,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:46:26,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:46:27,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1738 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1657 trivial. 0 not checked. [2020-12-23 00:46:27,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:46:27,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 12] total 48 [2020-12-23 00:46:27,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124987874] [2020-12-23 00:46:27,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 00:46:27,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:46:27,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 00:46:27,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=768, Invalid=1488, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 00:46:27,309 INFO L87 Difference]: Start difference. First operand 178 states and 182 transitions. Second operand 48 states. [2020-12-23 00:46:27,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:46:27,597 INFO L93 Difference]: Finished difference Result 289 states and 298 transitions. [2020-12-23 00:46:27,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 00:46:27,598 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 177 [2020-12-23 00:46:27,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:46:27,598 INFO L225 Difference]: With dead ends: 289 [2020-12-23 00:46:27,599 INFO L226 Difference]: Without dead ends: 184 [2020-12-23 00:46:27,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=768, Invalid=1488, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 00:46:27,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-12-23 00:46:27,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2020-12-23 00:46:27,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-12-23 00:46:27,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 186 transitions. [2020-12-23 00:46:27,605 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 186 transitions. Word has length 177 [2020-12-23 00:46:27,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:46:27,605 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 186 transitions. [2020-12-23 00:46:27,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 00:46:27,606 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 186 transitions. [2020-12-23 00:46:27,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-12-23 00:46:27,607 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:46:27,607 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 12, 12, 12, 12, 12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:46:27,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 00:46:27,823 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:46:27,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:46:27,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1693026416, now seen corresponding path program 37 times [2020-12-23 00:46:27,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:46:27,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413664527] [2020-12-23 00:46:27,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:46:27,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:46:28,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1828 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-12-23 00:46:28,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413664527] [2020-12-23 00:46:28,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933053958] [2020-12-23 00:46:28,863 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:46:29,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:46:29,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 00:46:29,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:46:29,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1828 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-12-23 00:46:29,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:46:29,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-23 00:46:29,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625400314] [2020-12-23 00:46:29,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 00:46:29,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:46:29,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 00:46:29,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:46:29,229 INFO L87 Difference]: Start difference. First operand 182 states and 186 transitions. Second operand 40 states. [2020-12-23 00:46:29,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:46:29,391 INFO L93 Difference]: Finished difference Result 292 states and 300 transitions. [2020-12-23 00:46:29,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 00:46:29,391 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 181 [2020-12-23 00:46:29,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:46:29,393 INFO L225 Difference]: With dead ends: 292 [2020-12-23 00:46:29,393 INFO L226 Difference]: Without dead ends: 185 [2020-12-23 00:46:29,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:46:29,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-12-23 00:46:29,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2020-12-23 00:46:29,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-12-23 00:46:29,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 188 transitions. [2020-12-23 00:46:29,399 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 188 transitions. Word has length 181 [2020-12-23 00:46:29,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:46:29,400 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 188 transitions. [2020-12-23 00:46:29,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 00:46:29,400 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 188 transitions. [2020-12-23 00:46:29,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-12-23 00:46:29,401 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:46:29,401 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 12, 12, 12, 12, 12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:46:29,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 00:46:29,615 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:46:29,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:46:29,616 INFO L82 PathProgramCache]: Analyzing trace with hash 45772974, now seen corresponding path program 38 times [2020-12-23 00:46:29,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:46:29,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801824330] [2020-12-23 00:46:29,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:46:29,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:46:30,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1901 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-12-23 00:46:30,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801824330] [2020-12-23 00:46:30,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353427751] [2020-12-23 00:46:30,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:46:30,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:46:30,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:46:30,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 00:46:30,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:46:30,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1901 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-12-23 00:46:30,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:46:30,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-23 00:46:30,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852050131] [2020-12-23 00:46:30,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 00:46:30,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:46:30,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 00:46:30,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 00:46:30,938 INFO L87 Difference]: Start difference. First operand 184 states and 188 transitions. Second operand 41 states. [2020-12-23 00:46:31,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:46:31,083 INFO L93 Difference]: Finished difference Result 294 states and 302 transitions. [2020-12-23 00:46:31,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 00:46:31,084 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 183 [2020-12-23 00:46:31,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:46:31,088 INFO L225 Difference]: With dead ends: 294 [2020-12-23 00:46:31,088 INFO L226 Difference]: Without dead ends: 187 [2020-12-23 00:46:31,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 00:46:31,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-12-23 00:46:31,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2020-12-23 00:46:31,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-12-23 00:46:31,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 190 transitions. [2020-12-23 00:46:31,095 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 190 transitions. Word has length 183 [2020-12-23 00:46:31,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:46:31,095 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 190 transitions. [2020-12-23 00:46:31,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 00:46:31,095 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 190 transitions. [2020-12-23 00:46:31,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-12-23 00:46:31,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:46:31,096 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 12, 12, 12, 12, 12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:46:31,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:46:31,312 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:46:31,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:46:31,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1878147436, now seen corresponding path program 39 times [2020-12-23 00:46:31,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:46:31,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227811084] [2020-12-23 00:46:31,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:46:31,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:46:32,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1976 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-12-23 00:46:32,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227811084] [2020-12-23 00:46:32,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758771049] [2020-12-23 00:46:32,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:46:33,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-12-23 00:46:33,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:46:33,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:46:33,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:46:34,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1976 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1876 trivial. 0 not checked. [2020-12-23 00:46:34,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:46:34,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 13] total 52 [2020-12-23 00:46:34,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159645329] [2020-12-23 00:46:34,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-23 00:46:34,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:46:34,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-23 00:46:34,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=897, Invalid=1755, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 00:46:34,343 INFO L87 Difference]: Start difference. First operand 186 states and 190 transitions. Second operand 52 states. [2020-12-23 00:46:34,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:46:34,662 INFO L93 Difference]: Finished difference Result 299 states and 308 transitions. [2020-12-23 00:46:34,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-23 00:46:34,663 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 185 [2020-12-23 00:46:34,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:46:34,664 INFO L225 Difference]: With dead ends: 299 [2020-12-23 00:46:34,664 INFO L226 Difference]: Without dead ends: 192 [2020-12-23 00:46:34,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=897, Invalid=1755, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 00:46:34,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-12-23 00:46:34,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2020-12-23 00:46:34,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-12-23 00:46:34,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 194 transitions. [2020-12-23 00:46:34,671 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 194 transitions. Word has length 185 [2020-12-23 00:46:34,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:46:34,672 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 194 transitions. [2020-12-23 00:46:34,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-23 00:46:34,672 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 194 transitions. [2020-12-23 00:46:34,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-12-23 00:46:34,673 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:46:34,673 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 12, 12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:46:34,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-23 00:46:34,889 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:46:34,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:46:34,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1682311512, now seen corresponding path program 40 times [2020-12-23 00:46:34,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:46:34,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557559012] [2020-12-23 00:46:34,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:46:34,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:46:36,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2074 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2020-12-23 00:46:36,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557559012] [2020-12-23 00:46:36,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482470442] [2020-12-23 00:46:36,039 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:46:36,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:46:36,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:46:36,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:46:36,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:46:36,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2074 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1953 trivial. 0 not checked. [2020-12-23 00:46:36,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:46:36,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 14] total 54 [2020-12-23 00:46:36,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935099466] [2020-12-23 00:46:36,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-23 00:46:36,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:46:36,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-23 00:46:36,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1911, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 00:46:36,822 INFO L87 Difference]: Start difference. First operand 190 states and 194 transitions. Second operand 54 states. [2020-12-23 00:46:37,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:46:37,101 INFO L93 Difference]: Finished difference Result 305 states and 314 transitions. [2020-12-23 00:46:37,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-23 00:46:37,102 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 189 [2020-12-23 00:46:37,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:46:37,103 INFO L225 Difference]: With dead ends: 305 [2020-12-23 00:46:37,103 INFO L226 Difference]: Without dead ends: 196 [2020-12-23 00:46:37,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=951, Invalid=1911, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 00:46:37,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-12-23 00:46:37,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 194. [2020-12-23 00:46:37,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-12-23 00:46:37,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2020-12-23 00:46:37,110 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 189 [2020-12-23 00:46:37,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:46:37,110 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2020-12-23 00:46:37,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-23 00:46:37,110 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2020-12-23 00:46:37,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-12-23 00:46:37,111 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:46:37,112 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:46:37,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:46:37,326 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:46:37,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:46:37,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1750482404, now seen corresponding path program 41 times [2020-12-23 00:46:37,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:46:37,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438483771] [2020-12-23 00:46:37,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:46:37,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:46:38,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2176 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-12-23 00:46:38,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438483771] [2020-12-23 00:46:38,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779209027] [2020-12-23 00:46:38,451 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 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 [2020-12-23 00:48:07,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2020-12-23 00:48:07,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:48:07,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 00:48:07,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:48:07,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2176 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-12-23 00:48:07,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:48:07,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-23 00:48:07,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590655607] [2020-12-23 00:48:07,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 00:48:07,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:48:07,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 00:48:07,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 00:48:07,696 INFO L87 Difference]: Start difference. First operand 194 states and 198 transitions. Second operand 44 states. [2020-12-23 00:48:07,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:48:07,870 INFO L93 Difference]: Finished difference Result 308 states and 316 transitions. [2020-12-23 00:48:07,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 00:48:07,870 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 193 [2020-12-23 00:48:07,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:48:07,871 INFO L225 Difference]: With dead ends: 308 [2020-12-23 00:48:07,871 INFO L226 Difference]: Without dead ends: 197 [2020-12-23 00:48:07,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 00:48:07,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-12-23 00:48:07,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2020-12-23 00:48:07,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-12-23 00:48:07,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 200 transitions. [2020-12-23 00:48:07,877 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 200 transitions. Word has length 193 [2020-12-23 00:48:07,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:48:07,877 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 200 transitions. [2020-12-23 00:48:07,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 00:48:07,877 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 200 transitions. [2020-12-23 00:48:07,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-12-23 00:48:07,879 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:48:07,879 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:48:08,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:48:08,092 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:48:08,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:48:08,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1338423586, now seen corresponding path program 42 times [2020-12-23 00:48:08,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:48:08,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079687846] [2020-12-23 00:48:08,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:48:08,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:48:09,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2257 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-12-23 00:48:09,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079687846] [2020-12-23 00:48:09,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552445834] [2020-12-23 00:48:09,389 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 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