/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-examples/data_structures_set_multi_proc_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-22 23:48:25,016 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 23:48:25,020 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 23:48:25,082 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 23:48:25,083 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 23:48:25,089 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 23:48:25,093 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 23:48:25,099 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 23:48:25,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 23:48:25,111 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 23:48:25,116 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 23:48:25,118 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 23:48:25,118 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 23:48:25,121 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 23:48:25,123 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 23:48:25,125 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 23:48:25,127 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 23:48:25,131 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 23:48:25,139 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 23:48:25,145 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 23:48:25,148 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 23:48:25,150 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 23:48:25,152 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 23:48:25,155 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 23:48:25,164 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 23:48:25,177 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 23:48:25,178 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 23:48:25,178 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 23:48:25,179 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 23:48:25,248 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 23:48:25,248 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 23:48:25,254 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 23:48:25,255 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 23:48:25,255 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 23:48:25,255 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 23:48:25,256 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 23:48:25,256 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 23:48:25,256 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 23:48:25,257 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 23:48:25,258 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 23:48:25,258 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 23:48:25,258 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 23:48:25,259 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 23:48:25,259 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 23:48:25,259 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 23:48:25,259 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 23:48:25,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 23:48:25,260 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 23:48:25,260 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 23:48:25,260 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 23:48:25,261 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 23:48:25,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 23:48:25,261 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 23:48:25,261 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 23:48:25,261 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 23:48:25,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 23:48:25,713 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 23:48:25,716 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 23:48:25,718 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 23:48:25,718 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 23:48:25,719 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i [2020-12-22 23:48:25,803 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/04c36e488/14d7f62d204e4a23bf02cbf819e4fab3/FLAG5801fa2a9 [2020-12-22 23:48:26,474 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 23:48:26,475 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i [2020-12-22 23:48:26,484 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/04c36e488/14d7f62d204e4a23bf02cbf819e4fab3/FLAG5801fa2a9 [2020-12-22 23:48:26,819 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/04c36e488/14d7f62d204e4a23bf02cbf819e4fab3 [2020-12-22 23:48:26,822 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 23:48:26,825 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 23:48:26,827 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 23:48:26,827 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 23:48:26,832 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 23:48:26,833 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:48:26" (1/1) ... [2020-12-22 23:48:26,836 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@304d3aa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:26, skipping insertion in model container [2020-12-22 23:48:26,836 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:48:26" (1/1) ... [2020-12-22 23:48:26,849 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 23:48:26,874 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 23:48:27,066 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-examples/data_structures_set_multi_proc_ground-1.i[832,845] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~set,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~set,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~size,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~set~0,],[IdentifierExpression[~x~0,]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~values~0,],[IdentifierExpression[~v~0,]]] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~n~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2020-12-22 23:48:27,098 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 23:48:27,108 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 23:48:27,124 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-examples/data_structures_set_multi_proc_ground-1.i[832,845] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~set,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~set,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~size,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#set~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#set~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~x~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#values~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#values~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~v~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~n~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2020-12-22 23:48:27,141 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 23:48:27,164 INFO L208 MainTranslator]: Completed translation [2020-12-22 23:48:27,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27 WrapperNode [2020-12-22 23:48:27,165 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 23:48:27,166 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 23:48:27,166 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 23:48:27,167 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 23:48:27,177 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,188 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,219 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 23:48:27,220 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 23:48:27,220 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 23:48:27,220 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 23:48:27,231 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,234 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,235 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,242 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,249 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,251 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,254 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 23:48:27,255 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 23:48:27,256 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 23:48:27,256 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 23:48:27,259 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (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 [2020-12-22 23:48:27,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 23:48:27,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 23:48:27,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 23:48:27,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 23:48:27,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 23:48:27,379 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 23:48:27,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 23:48:27,978 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 23:48:27,978 INFO L299 CfgBuilder]: Removed 20 assume(true) statements. [2020-12-22 23:48:27,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:48:27 BoogieIcfgContainer [2020-12-22 23:48:27,980 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 23:48:27,982 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 23:48:27,982 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 23:48:27,986 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 23:48:27,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:48:26" (1/3) ... [2020-12-22 23:48:27,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@384bed5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:48:27, skipping insertion in model container [2020-12-22 23:48:27,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (2/3) ... [2020-12-22 23:48:27,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@384bed5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:48:27, skipping insertion in model container [2020-12-22 23:48:27,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:48:27" (3/3) ... [2020-12-22 23:48:27,991 INFO L111 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_ground-1.i [2020-12-22 23:48:27,999 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 23:48:28,004 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 23:48:28,025 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 23:48:28,058 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 23:48:28,059 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 23:48:28,059 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 23:48:28,059 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 23:48:28,059 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 23:48:28,060 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 23:48:28,060 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 23:48:28,060 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 23:48:28,080 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-12-22 23:48:28,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 23:48:28,087 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:28,088 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:28,088 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:28,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:28,096 INFO L82 PathProgramCache]: Analyzing trace with hash 212109301, now seen corresponding path program 1 times [2020-12-22 23:48:28,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:28,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441328001] [2020-12-22 23:48:28,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:28,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:28,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:48:28,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441328001] [2020-12-22 23:48:28,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 23:48:28,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 23:48:28,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885214211] [2020-12-22 23:48:28,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 23:48:28,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:28,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 23:48:28,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 23:48:28,362 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-12-22 23:48:28,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:28,493 INFO L93 Difference]: Finished difference Result 110 states and 165 transitions. [2020-12-22 23:48:28,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 23:48:28,496 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-22 23:48:28,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:28,507 INFO L225 Difference]: With dead ends: 110 [2020-12-22 23:48:28,508 INFO L226 Difference]: Without dead ends: 67 [2020-12-22 23:48:28,512 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 [2020-12-22 23:48:28,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-22 23:48:28,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 36. [2020-12-22 23:48:28,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-22 23:48:28,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2020-12-22 23:48:28,561 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 8 [2020-12-22 23:48:28,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:28,562 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2020-12-22 23:48:28,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 23:48:28,562 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2020-12-22 23:48:28,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 23:48:28,563 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:28,563 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:28,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 23:48:28,564 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:28,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:28,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1436007159, now seen corresponding path program 1 times [2020-12-22 23:48:28,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:28,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380359863] [2020-12-22 23:48:28,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:28,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:28,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:48:28,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380359863] [2020-12-22 23:48:28,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824951989] [2020-12-22 23:48:28,676 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 [2020-12-22 23:48:28,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:28,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 23:48:28,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:28,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:48:28,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:28,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 23:48:28,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211965842] [2020-12-22 23:48:28,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 23:48:28,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:28,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 23:48:28,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:48:28,879 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 5 states. [2020-12-22 23:48:29,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:29,011 INFO L93 Difference]: Finished difference Result 130 states and 164 transitions. [2020-12-22 23:48:29,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 23:48:29,012 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-22 23:48:29,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:29,014 INFO L225 Difference]: With dead ends: 130 [2020-12-22 23:48:29,015 INFO L226 Difference]: Without dead ends: 99 [2020-12-22 23:48:29,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:48:29,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-22 23:48:29,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 38. [2020-12-22 23:48:29,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 23:48:29,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2020-12-22 23:48:29,025 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 10 [2020-12-22 23:48:29,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:29,026 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2020-12-22 23:48:29,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 23:48:29,026 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2020-12-22 23:48:29,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 23:48:29,027 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:29,027 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:29,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 23:48:29,243 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:29,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:29,246 INFO L82 PathProgramCache]: Analyzing trace with hash 780809593, now seen corresponding path program 2 times [2020-12-22 23:48:29,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:29,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616121030] [2020-12-22 23:48:29,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:29,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:29,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 23:48:29,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616121030] [2020-12-22 23:48:29,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 23:48:29,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 23:48:29,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037037990] [2020-12-22 23:48:29,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 23:48:29,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:29,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 23:48:29,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 23:48:29,339 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand 4 states. [2020-12-22 23:48:29,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:29,375 INFO L93 Difference]: Finished difference Result 72 states and 92 transitions. [2020-12-22 23:48:29,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 23:48:29,376 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-22 23:48:29,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:29,377 INFO L225 Difference]: With dead ends: 72 [2020-12-22 23:48:29,377 INFO L226 Difference]: Without dead ends: 40 [2020-12-22 23:48:29,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 23:48:29,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-22 23:48:29,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-12-22 23:48:29,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-22 23:48:29,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2020-12-22 23:48:29,385 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 12 [2020-12-22 23:48:29,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:29,385 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2020-12-22 23:48:29,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 23:48:29,385 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2020-12-22 23:48:29,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 23:48:29,386 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:29,387 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] [2020-12-22 23:48:29,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 23:48:29,387 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:29,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:29,388 INFO L82 PathProgramCache]: Analyzing trace with hash 27211895, now seen corresponding path program 1 times [2020-12-22 23:48:29,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:29,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886807006] [2020-12-22 23:48:29,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:29,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:29,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 23:48:29,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886807006] [2020-12-22 23:48:29,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 23:48:29,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 23:48:29,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892191669] [2020-12-22 23:48:29,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 23:48:29,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:29,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 23:48:29,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 23:48:29,475 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand 3 states. [2020-12-22 23:48:29,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:29,501 INFO L93 Difference]: Finished difference Result 78 states and 100 transitions. [2020-12-22 23:48:29,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 23:48:29,502 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-12-22 23:48:29,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:29,503 INFO L225 Difference]: With dead ends: 78 [2020-12-22 23:48:29,503 INFO L226 Difference]: Without dead ends: 51 [2020-12-22 23:48:29,504 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 [2020-12-22 23:48:29,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-22 23:48:29,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-12-22 23:48:29,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-22 23:48:29,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2020-12-22 23:48:29,510 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 25 [2020-12-22 23:48:29,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:29,511 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2020-12-22 23:48:29,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 23:48:29,511 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2020-12-22 23:48:29,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 23:48:29,512 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:29,512 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] [2020-12-22 23:48:29,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 23:48:29,513 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:29,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:29,513 INFO L82 PathProgramCache]: Analyzing trace with hash 676355061, now seen corresponding path program 1 times [2020-12-22 23:48:29,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:29,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843618522] [2020-12-22 23:48:29,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:29,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:29,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 23:48:29,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843618522] [2020-12-22 23:48:29,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884972463] [2020-12-22 23:48:29,577 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 [2020-12-22 23:48:29,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:29,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 23:48:29,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:29,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 23:48:29,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:29,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-22 23:48:29,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554043501] [2020-12-22 23:48:29,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 23:48:29,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:29,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 23:48:29,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 23:48:29,765 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 7 states. [2020-12-22 23:48:29,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:29,927 INFO L93 Difference]: Finished difference Result 130 states and 164 transitions. [2020-12-22 23:48:29,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 23:48:29,928 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-12-22 23:48:29,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:29,929 INFO L225 Difference]: With dead ends: 130 [2020-12-22 23:48:29,930 INFO L226 Difference]: Without dead ends: 97 [2020-12-22 23:48:29,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-12-22 23:48:29,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-22 23:48:29,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 54. [2020-12-22 23:48:29,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 23:48:29,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2020-12-22 23:48:29,952 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 27 [2020-12-22 23:48:29,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:29,954 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2020-12-22 23:48:29,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 23:48:29,954 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2020-12-22 23:48:29,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 23:48:29,960 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:29,960 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:30,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:30,162 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:30,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:30,163 INFO L82 PathProgramCache]: Analyzing trace with hash -719529317, now seen corresponding path program 1 times [2020-12-22 23:48:30,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:30,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125249367] [2020-12-22 23:48:30,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:30,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:30,301 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 23:48:30,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125249367] [2020-12-22 23:48:30,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 23:48:30,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 23:48:30,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918208232] [2020-12-22 23:48:30,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 23:48:30,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:30,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 23:48:30,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 23:48:30,304 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand 4 states. [2020-12-22 23:48:30,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:30,325 INFO L93 Difference]: Finished difference Result 72 states and 90 transitions. [2020-12-22 23:48:30,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 23:48:30,328 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-12-22 23:48:30,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:30,329 INFO L225 Difference]: With dead ends: 72 [2020-12-22 23:48:30,329 INFO L226 Difference]: Without dead ends: 46 [2020-12-22 23:48:30,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:48:30,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-22 23:48:30,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-22 23:48:30,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 23:48:30,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-12-22 23:48:30,346 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 37 [2020-12-22 23:48:30,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:30,346 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-12-22 23:48:30,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 23:48:30,346 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-12-22 23:48:30,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 23:48:30,347 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:30,348 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:30,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 23:48:30,348 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:30,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:30,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1020039433, now seen corresponding path program 2 times [2020-12-22 23:48:30,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:30,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161276958] [2020-12-22 23:48:30,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:30,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:30,455 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 23:48:30,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161276958] [2020-12-22 23:48:30,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041805376] [2020-12-22 23:48:30,456 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 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 [2020-12-22 23:48:30,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:48:30,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:30,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 23:48:30,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:30,671 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 23:48:30,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:30,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 23:48:30,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455011108] [2020-12-22 23:48:30,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 23:48:30,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:30,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 23:48:30,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 23:48:30,678 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 7 states. [2020-12-22 23:48:30,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:30,767 INFO L93 Difference]: Finished difference Result 118 states and 138 transitions. [2020-12-22 23:48:30,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 23:48:30,768 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-12-22 23:48:30,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:30,773 INFO L225 Difference]: With dead ends: 118 [2020-12-22 23:48:30,773 INFO L226 Difference]: Without dead ends: 81 [2020-12-22 23:48:30,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 23:48:30,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-22 23:48:30,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 48. [2020-12-22 23:48:30,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-22 23:48:30,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2020-12-22 23:48:30,794 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 38 [2020-12-22 23:48:30,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:30,794 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2020-12-22 23:48:30,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 23:48:30,794 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2020-12-22 23:48:30,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 23:48:30,796 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:30,796 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:31,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:31,010 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:31,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:31,011 INFO L82 PathProgramCache]: Analyzing trace with hash 607523979, now seen corresponding path program 3 times [2020-12-22 23:48:31,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:31,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462592062] [2020-12-22 23:48:31,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:31,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:31,134 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 23:48:31,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462592062] [2020-12-22 23:48:31,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176903924] [2020-12-22 23:48:31,142 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 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 [2020-12-22 23:48:31,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 23:48:31,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:31,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 23:48:31,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:31,296 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 23:48:31,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:31,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2020-12-22 23:48:31,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500243394] [2020-12-22 23:48:31,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 23:48:31,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:31,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 23:48:31,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-22 23:48:31,299 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 10 states. [2020-12-22 23:48:31,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:31,438 INFO L93 Difference]: Finished difference Result 148 states and 175 transitions. [2020-12-22 23:48:31,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 23:48:31,439 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-12-22 23:48:31,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:31,440 INFO L225 Difference]: With dead ends: 148 [2020-12-22 23:48:31,440 INFO L226 Difference]: Without dead ends: 111 [2020-12-22 23:48:31,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-12-22 23:48:31,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-22 23:48:31,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 61. [2020-12-22 23:48:31,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-22 23:48:31,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2020-12-22 23:48:31,451 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 40 [2020-12-22 23:48:31,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:31,451 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2020-12-22 23:48:31,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 23:48:31,452 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2020-12-22 23:48:31,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 23:48:31,453 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:31,453 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:31,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:31,669 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:31,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:31,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1656109653, now seen corresponding path program 4 times [2020-12-22 23:48:31,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:31,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889124963] [2020-12-22 23:48:31,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:31,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:31,766 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-12-22 23:48:31,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889124963] [2020-12-22 23:48:31,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657613818] [2020-12-22 23:48:31,767 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 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 [2020-12-22 23:48:31,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:48:31,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:31,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 23:48:31,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:32,002 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-12-22 23:48:32,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:32,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 23:48:32,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721329360] [2020-12-22 23:48:32,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 23:48:32,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:32,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 23:48:32,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 23:48:32,004 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand 9 states. [2020-12-22 23:48:32,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:32,090 INFO L93 Difference]: Finished difference Result 160 states and 186 transitions. [2020-12-22 23:48:32,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 23:48:32,091 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2020-12-22 23:48:32,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:32,092 INFO L225 Difference]: With dead ends: 160 [2020-12-22 23:48:32,092 INFO L226 Difference]: Without dead ends: 112 [2020-12-22 23:48:32,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 23:48:32,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-22 23:48:32,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 63. [2020-12-22 23:48:32,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 23:48:32,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2020-12-22 23:48:32,101 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 51 [2020-12-22 23:48:32,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:32,101 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2020-12-22 23:48:32,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 23:48:32,102 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2020-12-22 23:48:32,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 23:48:32,103 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:32,103 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:32,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:32,318 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:32,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:32,319 INFO L82 PathProgramCache]: Analyzing trace with hash -112360087, now seen corresponding path program 5 times [2020-12-22 23:48:32,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:32,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848372267] [2020-12-22 23:48:32,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:32,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:32,434 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-12-22 23:48:32,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848372267] [2020-12-22 23:48:32,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174291516] [2020-12-22 23:48:32,435 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 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 [2020-12-22 23:48:32,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-22 23:48:32,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:32,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 23:48:32,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:32,774 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-22 23:48:32,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:32,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2020-12-22 23:48:32,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141968261] [2020-12-22 23:48:32,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 23:48:32,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:32,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 23:48:32,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-12-22 23:48:32,777 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand 13 states. [2020-12-22 23:48:33,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:33,327 INFO L93 Difference]: Finished difference Result 251 states and 291 transitions. [2020-12-22 23:48:33,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 23:48:33,327 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2020-12-22 23:48:33,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:33,330 INFO L225 Difference]: With dead ends: 251 [2020-12-22 23:48:33,331 INFO L226 Difference]: Without dead ends: 203 [2020-12-22 23:48:33,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=427, Invalid=905, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 23:48:33,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-12-22 23:48:33,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 67. [2020-12-22 23:48:33,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-22 23:48:33,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2020-12-22 23:48:33,343 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 53 [2020-12-22 23:48:33,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:33,343 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2020-12-22 23:48:33,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 23:48:33,344 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2020-12-22 23:48:33,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 23:48:33,344 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:33,345 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 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] [2020-12-22 23:48:33,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:33,560 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:33,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:33,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1113830631, now seen corresponding path program 1 times [2020-12-22 23:48:33,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:33,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782050330] [2020-12-22 23:48:33,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:33,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:33,666 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-22 23:48:33,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782050330] [2020-12-22 23:48:33,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871665587] [2020-12-22 23:48:33,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:33,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:33,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 23:48:33,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:33,884 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-22 23:48:33,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:33,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 23:48:33,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183905820] [2020-12-22 23:48:33,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 23:48:33,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:33,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 23:48:33,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 23:48:33,894 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand 11 states. [2020-12-22 23:48:34,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:34,008 INFO L93 Difference]: Finished difference Result 184 states and 212 transitions. [2020-12-22 23:48:34,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 23:48:34,009 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-12-22 23:48:34,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:34,011 INFO L225 Difference]: With dead ends: 184 [2020-12-22 23:48:34,011 INFO L226 Difference]: Without dead ends: 134 [2020-12-22 23:48:34,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 23:48:34,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-22 23:48:34,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 69. [2020-12-22 23:48:34,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-22 23:48:34,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2020-12-22 23:48:34,022 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 55 [2020-12-22 23:48:34,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:34,022 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2020-12-22 23:48:34,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 23:48:34,022 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2020-12-22 23:48:34,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 23:48:34,023 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:34,024 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 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] [2020-12-22 23:48:34,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:34,238 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:34,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:34,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1927636389, now seen corresponding path program 2 times [2020-12-22 23:48:34,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:34,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495222540] [2020-12-22 23:48:34,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:34,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:34,379 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-22 23:48:34,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495222540] [2020-12-22 23:48:34,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358515981] [2020-12-22 23:48:34,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:34,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:48:34,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:34,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 23:48:34,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:34,573 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-22 23:48:34,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:34,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 23:48:34,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013615616] [2020-12-22 23:48:34,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 23:48:34,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:34,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 23:48:34,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 23:48:34,576 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand 12 states. [2020-12-22 23:48:34,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:34,703 INFO L93 Difference]: Finished difference Result 194 states and 223 transitions. [2020-12-22 23:48:34,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 23:48:34,704 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-12-22 23:48:34,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:34,705 INFO L225 Difference]: With dead ends: 194 [2020-12-22 23:48:34,706 INFO L226 Difference]: Without dead ends: 144 [2020-12-22 23:48:34,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 23:48:34,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-22 23:48:34,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 71. [2020-12-22 23:48:34,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-22 23:48:34,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2020-12-22 23:48:34,715 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 57 [2020-12-22 23:48:34,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:34,716 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2020-12-22 23:48:34,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 23:48:34,716 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2020-12-22 23:48:34,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 23:48:34,717 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:34,717 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 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] [2020-12-22 23:48:34,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 23:48:34,931 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:34,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:34,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1984045341, now seen corresponding path program 3 times [2020-12-22 23:48:34,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:34,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771311918] [2020-12-22 23:48:34,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:34,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:35,089 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-22 23:48:35,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771311918] [2020-12-22 23:48:35,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976936274] [2020-12-22 23:48:35,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:35,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 23:48:35,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:35,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 23:48:35,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:35,294 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-12-22 23:48:35,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:35,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2020-12-22 23:48:35,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607617426] [2020-12-22 23:48:35,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 23:48:35,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:35,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 23:48:35,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-12-22 23:48:35,297 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand 16 states. [2020-12-22 23:48:35,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:35,520 INFO L93 Difference]: Finished difference Result 226 states and 262 transitions. [2020-12-22 23:48:35,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 23:48:35,521 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 59 [2020-12-22 23:48:35,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:35,522 INFO L225 Difference]: With dead ends: 226 [2020-12-22 23:48:35,522 INFO L226 Difference]: Without dead ends: 176 [2020-12-22 23:48:35,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2020-12-22 23:48:35,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-12-22 23:48:35,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 85. [2020-12-22 23:48:35,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-22 23:48:35,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2020-12-22 23:48:35,533 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 59 [2020-12-22 23:48:35,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:35,534 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2020-12-22 23:48:35,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 23:48:35,534 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2020-12-22 23:48:35,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 23:48:35,535 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:35,535 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:35,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:35,750 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:35,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:35,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1415133969, now seen corresponding path program 4 times [2020-12-22 23:48:35,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:35,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079428907] [2020-12-22 23:48:35,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:35,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:35,903 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-12-22 23:48:35,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079428907] [2020-12-22 23:48:35,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799017142] [2020-12-22 23:48:35,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:36,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:48:36,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:36,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 23:48:36,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:36,122 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-12-22 23:48:36,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:36,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 23:48:36,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793378915] [2020-12-22 23:48:36,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 23:48:36,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:36,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 23:48:36,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 23:48:36,125 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand 14 states. [2020-12-22 23:48:36,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:36,256 INFO L93 Difference]: Finished difference Result 238 states and 273 transitions. [2020-12-22 23:48:36,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 23:48:36,256 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 70 [2020-12-22 23:48:36,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:36,258 INFO L225 Difference]: With dead ends: 238 [2020-12-22 23:48:36,258 INFO L226 Difference]: Without dead ends: 176 [2020-12-22 23:48:36,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 23:48:36,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-12-22 23:48:36,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 87. [2020-12-22 23:48:36,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-22 23:48:36,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2020-12-22 23:48:36,268 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 70 [2020-12-22 23:48:36,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:36,268 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2020-12-22 23:48:36,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 23:48:36,268 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2020-12-22 23:48:36,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 23:48:36,269 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:36,269 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:36,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:36,483 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:36,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:36,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1534839149, now seen corresponding path program 5 times [2020-12-22 23:48:36,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:36,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962337090] [2020-12-22 23:48:36,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:36,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:36,642 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-12-22 23:48:36,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962337090] [2020-12-22 23:48:36,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48072216] [2020-12-22 23:48:36,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:37,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-22 23:48:37,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:37,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 23:48:37,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:37,679 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-12-22 23:48:37,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:37,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2020-12-22 23:48:37,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888800067] [2020-12-22 23:48:37,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 23:48:37,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:37,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 23:48:37,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-12-22 23:48:37,682 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand 19 states. [2020-12-22 23:48:37,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:37,972 INFO L93 Difference]: Finished difference Result 270 states and 312 transitions. [2020-12-22 23:48:37,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 23:48:37,973 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 72 [2020-12-22 23:48:37,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:37,974 INFO L225 Difference]: With dead ends: 270 [2020-12-22 23:48:37,975 INFO L226 Difference]: Without dead ends: 208 [2020-12-22 23:48:37,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=346, Unknown=0, NotChecked=0, Total=552 [2020-12-22 23:48:37,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-12-22 23:48:37,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 101. [2020-12-22 23:48:37,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-22 23:48:37,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 115 transitions. [2020-12-22 23:48:37,989 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 115 transitions. Word has length 72 [2020-12-22 23:48:37,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:37,989 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 115 transitions. [2020-12-22 23:48:37,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 23:48:37,989 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 115 transitions. [2020-12-22 23:48:37,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 23:48:37,990 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:37,990 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:38,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 23:48:38,205 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:38,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:38,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1835696295, now seen corresponding path program 6 times [2020-12-22 23:48:38,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:38,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528268209] [2020-12-22 23:48:38,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:38,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:38,386 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-12-22 23:48:38,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528268209] [2020-12-22 23:48:38,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195977226] [2020-12-22 23:48:38,387 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 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 [2020-12-22 23:48:39,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-22 23:48:39,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:39,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 23:48:39,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:39,402 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-22 23:48:39,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:39,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2020-12-22 23:48:39,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802577863] [2020-12-22 23:48:39,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 23:48:39,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:39,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 23:48:39,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2020-12-22 23:48:39,407 INFO L87 Difference]: Start difference. First operand 101 states and 115 transitions. Second operand 21 states. [2020-12-22 23:48:39,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:39,731 INFO L93 Difference]: Finished difference Result 304 states and 351 transitions. [2020-12-22 23:48:39,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 23:48:39,732 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 83 [2020-12-22 23:48:39,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:39,734 INFO L225 Difference]: With dead ends: 304 [2020-12-22 23:48:39,734 INFO L226 Difference]: Without dead ends: 230 [2020-12-22 23:48:39,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=258, Invalid=444, Unknown=0, NotChecked=0, Total=702 [2020-12-22 23:48:39,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-12-22 23:48:39,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 115. [2020-12-22 23:48:39,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-22 23:48:39,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 131 transitions. [2020-12-22 23:48:39,747 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 131 transitions. Word has length 83 [2020-12-22 23:48:39,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:39,747 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 131 transitions. [2020-12-22 23:48:39,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 23:48:39,748 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 131 transitions. [2020-12-22 23:48:39,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 23:48:39,749 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:39,749 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:39,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 23:48:39,965 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:39,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:39,966 INFO L82 PathProgramCache]: Analyzing trace with hash 2084179419, now seen corresponding path program 7 times [2020-12-22 23:48:39,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:39,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034710803] [2020-12-22 23:48:39,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:40,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:40,192 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2020-12-22 23:48:40,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034710803] [2020-12-22 23:48:40,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845562132] [2020-12-22 23:48:40,193 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 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 [2020-12-22 23:48:40,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:40,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 23:48:40,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:40,464 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2020-12-22 23:48:40,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:40,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 23:48:40,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581170105] [2020-12-22 23:48:40,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 23:48:40,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:40,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 23:48:40,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 23:48:40,466 INFO L87 Difference]: Start difference. First operand 115 states and 131 transitions. Second operand 17 states. [2020-12-22 23:48:40,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:40,651 INFO L93 Difference]: Finished difference Result 316 states and 362 transitions. [2020-12-22 23:48:40,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 23:48:40,651 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 94 [2020-12-22 23:48:40,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:40,653 INFO L225 Difference]: With dead ends: 316 [2020-12-22 23:48:40,653 INFO L226 Difference]: Without dead ends: 230 [2020-12-22 23:48:40,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 23:48:40,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-12-22 23:48:40,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 117. [2020-12-22 23:48:40,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-22 23:48:40,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 133 transitions. [2020-12-22 23:48:40,665 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 133 transitions. Word has length 94 [2020-12-22 23:48:40,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:40,666 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 133 transitions. [2020-12-22 23:48:40,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 23:48:40,666 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 133 transitions. [2020-12-22 23:48:40,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 23:48:40,667 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:40,667 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:40,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 23:48:40,882 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:40,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:40,883 INFO L82 PathProgramCache]: Analyzing trace with hash -362077347, now seen corresponding path program 8 times [2020-12-22 23:48:40,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:40,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406324484] [2020-12-22 23:48:40,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:40,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:41,105 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2020-12-22 23:48:41,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406324484] [2020-12-22 23:48:41,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893966364] [2020-12-22 23:48:41,107 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 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 [2020-12-22 23:48:41,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:48:41,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:41,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 23:48:41,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:41,501 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2020-12-22 23:48:41,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:41,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 23:48:41,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4422591] [2020-12-22 23:48:41,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 23:48:41,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:41,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 23:48:41,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 23:48:41,507 INFO L87 Difference]: Start difference. First operand 117 states and 133 transitions. Second operand 18 states. [2020-12-22 23:48:41,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:41,813 INFO L93 Difference]: Finished difference Result 326 states and 373 transitions. [2020-12-22 23:48:41,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 23:48:41,814 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 96 [2020-12-22 23:48:41,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:41,815 INFO L225 Difference]: With dead ends: 326 [2020-12-22 23:48:41,815 INFO L226 Difference]: Without dead ends: 240 [2020-12-22 23:48:41,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 23:48:41,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-12-22 23:48:41,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 119. [2020-12-22 23:48:41,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-12-22 23:48:41,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 135 transitions. [2020-12-22 23:48:41,829 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 135 transitions. Word has length 96 [2020-12-22 23:48:41,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:41,829 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 135 transitions. [2020-12-22 23:48:41,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 23:48:41,830 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 135 transitions. [2020-12-22 23:48:41,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 23:48:41,832 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:41,832 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:42,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:42,046 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:42,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:42,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1867718561, now seen corresponding path program 9 times [2020-12-22 23:48:42,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:42,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20114297] [2020-12-22 23:48:42,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:42,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:42,315 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2020-12-22 23:48:42,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20114297] [2020-12-22 23:48:42,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792570729] [2020-12-22 23:48:42,316 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 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 [2020-12-22 23:48:42,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-22 23:48:42,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:42,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 23:48:42,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:42,887 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2020-12-22 23:48:42,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:42,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9] total 25 [2020-12-22 23:48:42,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718579220] [2020-12-22 23:48:42,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 23:48:42,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:42,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 23:48:42,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-12-22 23:48:42,890 INFO L87 Difference]: Start difference. First operand 119 states and 135 transitions. Second operand 25 states. [2020-12-22 23:48:43,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:43,297 INFO L93 Difference]: Finished difference Result 358 states and 412 transitions. [2020-12-22 23:48:43,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 23:48:43,298 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 98 [2020-12-22 23:48:43,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:43,299 INFO L225 Difference]: With dead ends: 358 [2020-12-22 23:48:43,299 INFO L226 Difference]: Without dead ends: 272 [2020-12-22 23:48:43,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=363, Invalid=629, Unknown=0, NotChecked=0, Total=992 [2020-12-22 23:48:43,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-12-22 23:48:43,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 133. [2020-12-22 23:48:43,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-12-22 23:48:43,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 151 transitions. [2020-12-22 23:48:43,313 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 151 transitions. Word has length 98 [2020-12-22 23:48:43,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:43,313 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 151 transitions. [2020-12-22 23:48:43,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 23:48:43,313 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 151 transitions. [2020-12-22 23:48:43,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 23:48:43,314 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:43,315 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:43,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:43,530 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:43,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:43,531 INFO L82 PathProgramCache]: Analyzing trace with hash -481778419, now seen corresponding path program 10 times [2020-12-22 23:48:43,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:43,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368703648] [2020-12-22 23:48:43,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:43,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:43,833 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2020-12-22 23:48:43,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368703648] [2020-12-22 23:48:43,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938348880] [2020-12-22 23:48:43,834 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 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 [2020-12-22 23:48:44,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:48:44,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:44,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 23:48:44,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:44,225 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2020-12-22 23:48:44,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:44,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 23:48:44,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426503712] [2020-12-22 23:48:44,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 23:48:44,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:44,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 23:48:44,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 23:48:44,228 INFO L87 Difference]: Start difference. First operand 133 states and 151 transitions. Second operand 20 states. [2020-12-22 23:48:44,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:44,472 INFO L93 Difference]: Finished difference Result 370 states and 423 transitions. [2020-12-22 23:48:44,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 23:48:44,473 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 109 [2020-12-22 23:48:44,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:44,501 INFO L225 Difference]: With dead ends: 370 [2020-12-22 23:48:44,502 INFO L226 Difference]: Without dead ends: 272 [2020-12-22 23:48:44,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 23:48:44,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-12-22 23:48:44,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 135. [2020-12-22 23:48:44,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-12-22 23:48:44,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 153 transitions. [2020-12-22 23:48:44,517 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 153 transitions. Word has length 109 [2020-12-22 23:48:44,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:44,517 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 153 transitions. [2020-12-22 23:48:44,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 23:48:44,518 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 153 transitions. [2020-12-22 23:48:44,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 23:48:44,519 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:44,519 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:44,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:44,734 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:44,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:44,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1338139829, now seen corresponding path program 11 times [2020-12-22 23:48:44,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:44,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150316097] [2020-12-22 23:48:44,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:44,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:45,042 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2020-12-22 23:48:45,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150316097] [2020-12-22 23:48:45,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72132753] [2020-12-22 23:48:45,043 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 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 [2020-12-22 23:49:30,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-22 23:49:30,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:30,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 23:49:30,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:30,667 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2020-12-22 23:49:30,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:30,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 23:49:30,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875274304] [2020-12-22 23:49:30,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 23:49:30,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:30,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 23:49:30,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 23:49:30,669 INFO L87 Difference]: Start difference. First operand 135 states and 153 transitions. Second operand 21 states. [2020-12-22 23:49:30,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:30,981 INFO L93 Difference]: Finished difference Result 380 states and 434 transitions. [2020-12-22 23:49:30,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 23:49:30,981 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 111 [2020-12-22 23:49:30,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:30,983 INFO L225 Difference]: With dead ends: 380 [2020-12-22 23:49:30,983 INFO L226 Difference]: Without dead ends: 282 [2020-12-22 23:49:30,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 23:49:30,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-12-22 23:49:30,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 137. [2020-12-22 23:49:30,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-22 23:49:30,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 155 transitions. [2020-12-22 23:49:30,999 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 155 transitions. Word has length 111 [2020-12-22 23:49:30,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:30,999 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 155 transitions. [2020-12-22 23:49:30,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 23:49:31,000 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 155 transitions. [2020-12-22 23:49:31,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 23:49:31,001 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:31,001 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:31,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 23:49:31,202 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:31,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:31,203 INFO L82 PathProgramCache]: Analyzing trace with hash 332265993, now seen corresponding path program 12 times [2020-12-22 23:49:31,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:31,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991182302] [2020-12-22 23:49:31,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:31,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:31,494 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2020-12-22 23:49:31,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991182302] [2020-12-22 23:49:31,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057590257] [2020-12-22 23:49:31,494 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 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 [2020-12-22 23:49:37,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-12-22 23:49:37,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:37,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 23:49:37,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:37,331 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2020-12-22 23:49:37,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:37,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10] total 29 [2020-12-22 23:49:37,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953387617] [2020-12-22 23:49:37,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 23:49:37,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:37,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 23:49:37,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2020-12-22 23:49:37,334 INFO L87 Difference]: Start difference. First operand 137 states and 155 transitions. Second operand 29 states. [2020-12-22 23:49:37,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:37,885 INFO L93 Difference]: Finished difference Result 412 states and 473 transitions. [2020-12-22 23:49:37,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 23:49:37,888 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 113 [2020-12-22 23:49:37,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:37,890 INFO L225 Difference]: With dead ends: 412 [2020-12-22 23:49:37,890 INFO L226 Difference]: Without dead ends: 314 [2020-12-22 23:49:37,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=486, Invalid=846, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 23:49:37,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-12-22 23:49:37,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 151. [2020-12-22 23:49:37,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-22 23:49:37,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 171 transitions. [2020-12-22 23:49:37,906 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 171 transitions. Word has length 113 [2020-12-22 23:49:37,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:37,906 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 171 transitions. [2020-12-22 23:49:37,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 23:49:37,907 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 171 transitions. [2020-12-22 23:49:37,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 23:49:37,908 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:37,908 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 8, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:38,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 23:49:38,109 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:38,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:38,110 INFO L82 PathProgramCache]: Analyzing trace with hash -713195989, now seen corresponding path program 13 times [2020-12-22 23:49:38,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:38,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569029722] [2020-12-22 23:49:38,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:38,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:38,443 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2020-12-22 23:49:38,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569029722] [2020-12-22 23:49:38,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451456378] [2020-12-22 23:49:38,444 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 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 [2020-12-22 23:49:38,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:38,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 23:49:38,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:38,751 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2020-12-22 23:49:38,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:38,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 23:49:38,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827380628] [2020-12-22 23:49:38,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 23:49:38,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:38,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 23:49:38,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 23:49:38,753 INFO L87 Difference]: Start difference. First operand 151 states and 171 transitions. Second operand 23 states. [2020-12-22 23:49:39,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:39,059 INFO L93 Difference]: Finished difference Result 424 states and 484 transitions. [2020-12-22 23:49:39,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 23:49:39,059 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 124 [2020-12-22 23:49:39,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:39,061 INFO L225 Difference]: With dead ends: 424 [2020-12-22 23:49:39,061 INFO L226 Difference]: Without dead ends: 314 [2020-12-22 23:49:39,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 23:49:39,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-12-22 23:49:39,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 153. [2020-12-22 23:49:39,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-22 23:49:39,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 173 transitions. [2020-12-22 23:49:39,078 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 173 transitions. Word has length 124 [2020-12-22 23:49:39,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:39,078 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 173 transitions. [2020-12-22 23:49:39,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 23:49:39,079 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 173 transitions. [2020-12-22 23:49:39,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-22 23:49:39,080 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:39,080 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 8, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:39,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 23:49:39,295 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:39,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:39,295 INFO L82 PathProgramCache]: Analyzing trace with hash -829324243, now seen corresponding path program 14 times [2020-12-22 23:49:39,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:39,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859953732] [2020-12-22 23:49:39,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:39,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:39,681 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2020-12-22 23:49:39,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859953732] [2020-12-22 23:49:39,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763082816] [2020-12-22 23:49:39,681 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 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 [2020-12-22 23:49:39,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:49:39,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:39,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 23:49:39,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:39,978 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2020-12-22 23:49:39,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:39,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-22 23:49:39,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997516585] [2020-12-22 23:49:39,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 23:49:39,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:39,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 23:49:39,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 23:49:39,980 INFO L87 Difference]: Start difference. First operand 153 states and 173 transitions. Second operand 24 states. [2020-12-22 23:49:40,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:40,364 INFO L93 Difference]: Finished difference Result 434 states and 495 transitions. [2020-12-22 23:49:40,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 23:49:40,365 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 126 [2020-12-22 23:49:40,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:40,367 INFO L225 Difference]: With dead ends: 434 [2020-12-22 23:49:40,367 INFO L226 Difference]: Without dead ends: 324 [2020-12-22 23:49:40,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 23:49:40,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2020-12-22 23:49:40,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 155. [2020-12-22 23:49:40,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-22 23:49:40,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 175 transitions. [2020-12-22 23:49:40,386 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 175 transitions. Word has length 126 [2020-12-22 23:49:40,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:40,386 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 175 transitions. [2020-12-22 23:49:40,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 23:49:40,386 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 175 transitions. [2020-12-22 23:49:40,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-22 23:49:40,388 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:40,388 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 8, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:40,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 23:49:40,602 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:40,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:40,603 INFO L82 PathProgramCache]: Analyzing trace with hash -759426641, now seen corresponding path program 15 times [2020-12-22 23:49:40,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:40,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021973778] [2020-12-22 23:49:40,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:40,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:41,012 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2020-12-22 23:49:41,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021973778] [2020-12-22 23:49:41,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480968374] [2020-12-22 23:49:41,013 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 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 [2020-12-22 23:49:42,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-22 23:49:42,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:42,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 23:49:42,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:43,115 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 638 trivial. 0 not checked. [2020-12-22 23:49:43,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:43,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 11] total 33 [2020-12-22 23:49:43,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611011535] [2020-12-22 23:49:43,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 23:49:43,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:43,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 23:49:43,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=726, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 23:49:43,117 INFO L87 Difference]: Start difference. First operand 155 states and 175 transitions. Second operand 33 states. [2020-12-22 23:49:43,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:43,798 INFO L93 Difference]: Finished difference Result 466 states and 534 transitions. [2020-12-22 23:49:43,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 23:49:43,798 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 128 [2020-12-22 23:49:43,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:43,800 INFO L225 Difference]: With dead ends: 466 [2020-12-22 23:49:43,800 INFO L226 Difference]: Without dead ends: 356 [2020-12-22 23:49:43,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=627, Invalid=1095, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 23:49:43,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2020-12-22 23:49:43,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 169. [2020-12-22 23:49:43,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-12-22 23:49:43,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 191 transitions. [2020-12-22 23:49:43,823 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 191 transitions. Word has length 128 [2020-12-22 23:49:43,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:43,823 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 191 transitions. [2020-12-22 23:49:43,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 23:49:43,824 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 191 transitions. [2020-12-22 23:49:43,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-22 23:49:43,825 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:43,825 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 9, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:44,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 23:49:44,040 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:44,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:44,041 INFO L82 PathProgramCache]: Analyzing trace with hash -441718595, now seen corresponding path program 16 times [2020-12-22 23:49:44,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:44,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713263968] [2020-12-22 23:49:44,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:44,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:44,440 INFO L134 CoverageAnalysis]: Checked inductivity of 818 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2020-12-22 23:49:44,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713263968] [2020-12-22 23:49:44,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700122234] [2020-12-22 23:49:44,441 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 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 [2020-12-22 23:49:44,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:49:44,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:44,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 803 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 23:49:44,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:44,902 INFO L134 CoverageAnalysis]: Checked inductivity of 818 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2020-12-22 23:49:44,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:44,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-22 23:49:44,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379176976] [2020-12-22 23:49:44,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 23:49:44,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:44,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 23:49:44,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-22 23:49:44,904 INFO L87 Difference]: Start difference. First operand 169 states and 191 transitions. Second operand 26 states. [2020-12-22 23:49:45,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:45,339 INFO L93 Difference]: Finished difference Result 478 states and 545 transitions. [2020-12-22 23:49:45,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 23:49:45,339 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 139 [2020-12-22 23:49:45,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:45,341 INFO L225 Difference]: With dead ends: 478 [2020-12-22 23:49:45,341 INFO L226 Difference]: Without dead ends: 356 [2020-12-22 23:49:45,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-22 23:49:45,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2020-12-22 23:49:45,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 171. [2020-12-22 23:49:45,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-12-22 23:49:45,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 193 transitions. [2020-12-22 23:49:45,364 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 193 transitions. Word has length 139 [2020-12-22 23:49:45,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:45,364 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 193 transitions. [2020-12-22 23:49:45,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 23:49:45,365 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 193 transitions. [2020-12-22 23:49:45,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-22 23:49:45,366 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:45,366 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 9, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:45,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:45,581 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:45,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:45,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1349443195, now seen corresponding path program 17 times [2020-12-22 23:49:45,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:45,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351889358] [2020-12-22 23:49:45,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:45,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:46,060 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2020-12-22 23:49:46,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351889358] [2020-12-22 23:49:46,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440974948] [2020-12-22 23:49:46,061 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 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