/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/standard_copy3_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 09:42:17,996 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 09:42:18,002 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 09:42:18,050 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 09:42:18,051 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 09:42:18,056 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 09:42:18,060 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 09:42:18,066 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 09:42:18,069 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 09:42:18,075 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 09:42:18,080 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 09:42:18,082 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 09:42:18,082 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 09:42:18,086 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 09:42:18,088 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 09:42:18,090 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 09:42:18,091 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 09:42:18,095 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 09:42:18,113 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 09:42:18,116 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 09:42:18,118 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 09:42:18,120 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 09:42:18,122 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 09:42:18,123 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 09:42:18,126 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 09:42:18,137 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 09:42:18,138 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 09:42:18,139 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 09:42:18,140 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 09:42:18,170 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 09:42:18,171 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 09:42:18,173 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 09:42:18,173 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 09:42:18,174 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 09:42:18,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 09:42:18,174 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 09:42:18,175 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 09:42:18,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 09:42:18,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 09:42:18,175 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 09:42:18,175 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 09:42:18,176 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 09:42:18,177 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 09:42:18,177 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 09:42:18,178 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 09:42:18,178 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 09:42:18,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:42:18,178 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 09:42:18,179 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 09:42:18,179 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 09:42:18,179 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 09:42:18,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 09:42:18,179 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 09:42:18,180 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 09:42:18,180 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 09:42:18,696 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 09:42:18,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 09:42:18,760 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 09:42:18,761 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 09:42:18,762 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 09:42:18,764 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy3_ground-1.i [2021-01-06 09:42:18,879 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b5e598b6c/a510fb7ef1c04a0c8dcacc63332ca2d4/FLAG2fe04baae [2021-01-06 09:42:19,648 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 09:42:19,649 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy3_ground-1.i [2021-01-06 09:42:19,661 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b5e598b6c/a510fb7ef1c04a0c8dcacc63332ca2d4/FLAG2fe04baae [2021-01-06 09:42:19,999 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b5e598b6c/a510fb7ef1c04a0c8dcacc63332ca2d4 [2021-01-06 09:42:20,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 09:42:20,006 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 09:42:20,009 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 09:42:20,009 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 09:42:20,013 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 09:42:20,015 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:42:20" (1/1) ... [2021-01-06 09:42:20,016 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5611752a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:20, skipping insertion in model container [2021-01-06 09:42:20,017 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:42:20" (1/1) ... [2021-01-06 09:42:20,026 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 09:42:20,047 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 09:42:20,222 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/standard_copy3_ground-1.i[816,829] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a1~0,],[IdentifierExpression[~a~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a2~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a3~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a4~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 09:42:20,251 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:42:20,262 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 09:42:20,279 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/standard_copy3_ground-1.i[816,829] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a1~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~a~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a2~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a2~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a3~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a3~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a4~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a4~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 09:42:20,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:42:20,311 INFO L208 MainTranslator]: Completed translation [2021-01-06 09:42:20,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:20 WrapperNode [2021-01-06 09:42:20,312 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 09:42:20,314 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 09:42:20,314 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 09:42:20,315 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 09:42:20,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:20" (1/1) ... [2021-01-06 09:42:20,335 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:20" (1/1) ... [2021-01-06 09:42:20,362 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 09:42:20,363 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 09:42:20,363 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 09:42:20,364 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 09:42:20,374 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:20" (1/1) ... [2021-01-06 09:42:20,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:20" (1/1) ... [2021-01-06 09:42:20,378 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:20" (1/1) ... [2021-01-06 09:42:20,378 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:20" (1/1) ... [2021-01-06 09:42:20,386 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:20" (1/1) ... [2021-01-06 09:42:20,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:20" (1/1) ... [2021-01-06 09:42:20,395 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:20" (1/1) ... [2021-01-06 09:42:20,398 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 09:42:20,399 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 09:42:20,399 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 09:42:20,399 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 09:42:20,401 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:20" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:42:20,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 09:42:20,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 09:42:20,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 09:42:20,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 09:42:20,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 09:42:20,509 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 09:42:20,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 09:42:21,020 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 09:42:21,020 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-01-06 09:42:21,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:42:21 BoogieIcfgContainer [2021-01-06 09:42:21,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 09:42:21,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 09:42:21,026 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 09:42:21,031 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 09:42:21,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 09:42:20" (1/3) ... [2021-01-06 09:42:21,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44d499c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:42:21, skipping insertion in model container [2021-01-06 09:42:21,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:20" (2/3) ... [2021-01-06 09:42:21,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44d499c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:42:21, skipping insertion in model container [2021-01-06 09:42:21,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:42:21" (3/3) ... [2021-01-06 09:42:21,037 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy3_ground-1.i [2021-01-06 09:42:21,046 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 09:42:21,054 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 09:42:21,083 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 09:42:21,118 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 09:42:21,118 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 09:42:21,119 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 09:42:21,119 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 09:42:21,119 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 09:42:21,119 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 09:42:21,119 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 09:42:21,120 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 09:42:21,137 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2021-01-06 09:42:21,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 09:42:21,144 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:21,145 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:21,146 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:21,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:21,154 INFO L82 PathProgramCache]: Analyzing trace with hash -2053894623, now seen corresponding path program 1 times [2021-01-06 09:42:21,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:21,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649263748] [2021-01-06 09:42:21,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:21,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:21,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:42:21,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649263748] [2021-01-06 09:42:21,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:42:21,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 09:42:21,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339709192] [2021-01-06 09:42:21,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:42:21,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:21,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:42:21,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:42:21,543 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2021-01-06 09:42:21,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:21,611 INFO L93 Difference]: Finished difference Result 46 states and 66 transitions. [2021-01-06 09:42:21,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:42:21,614 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2021-01-06 09:42:21,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:21,639 INFO L225 Difference]: With dead ends: 46 [2021-01-06 09:42:21,639 INFO L226 Difference]: Without dead ends: 22 [2021-01-06 09:42:21,647 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 [2021-01-06 09:42:21,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-01-06 09:42:21,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-01-06 09:42:21,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 09:42:21,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-01-06 09:42:21,696 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2021-01-06 09:42:21,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:21,696 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-01-06 09:42:21,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:42:21,697 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-01-06 09:42:21,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 09:42:21,699 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:21,699 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:21,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 09:42:21,701 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:21,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:21,704 INFO L82 PathProgramCache]: Analyzing trace with hash -418223009, now seen corresponding path program 1 times [2021-01-06 09:42:21,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:21,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310035026] [2021-01-06 09:42:21,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:21,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:21,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:42:21,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310035026] [2021-01-06 09:42:21,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401622166] [2021-01-06 09:42:21,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:22,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:22,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 09:42:22,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:22,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 09:42:22,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 09:42:22,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 09:42:22,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873669503] [2021-01-06 09:42:22,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:42:22,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:22,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:42:22,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:42:22,110 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2021-01-06 09:42:22,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:22,211 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2021-01-06 09:42:22,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:42:22,212 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2021-01-06 09:42:22,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:22,216 INFO L225 Difference]: With dead ends: 40 [2021-01-06 09:42:22,216 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 09:42:22,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:42:22,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 09:42:22,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2021-01-06 09:42:22,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 09:42:22,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-01-06 09:42:22,235 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 15 [2021-01-06 09:42:22,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:22,236 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-01-06 09:42:22,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:42:22,237 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-01-06 09:42:22,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 09:42:22,239 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:22,240 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:22,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 09:42:22,456 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:22,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:22,456 INFO L82 PathProgramCache]: Analyzing trace with hash 241580185, now seen corresponding path program 1 times [2021-01-06 09:42:22,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:22,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042628290] [2021-01-06 09:42:22,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:22,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:22,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 09:42:22,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042628290] [2021-01-06 09:42:22,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333134085] [2021-01-06 09:42:22,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:22,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:22,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 09:42:22,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:22,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 09:42:22,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:22,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 09:42:22,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498262871] [2021-01-06 09:42:22,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:42:22,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:22,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:42:22,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:42:22,786 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 5 states. [2021-01-06 09:42:22,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:22,817 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2021-01-06 09:42:22,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:42:22,818 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2021-01-06 09:42:22,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:22,819 INFO L225 Difference]: With dead ends: 46 [2021-01-06 09:42:22,819 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 09:42:22,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:42:22,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 09:42:22,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-01-06 09:42:22,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 09:42:22,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-01-06 09:42:22,828 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 21 [2021-01-06 09:42:22,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:22,829 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-01-06 09:42:22,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:42:22,829 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-01-06 09:42:22,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 09:42:22,831 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:22,831 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] [2021-01-06 09:42:23,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:23,033 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:23,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:23,035 INFO L82 PathProgramCache]: Analyzing trace with hash 456751319, now seen corresponding path program 2 times [2021-01-06 09:42:23,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:23,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646839570] [2021-01-06 09:42:23,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:23,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:23,102 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 09:42:23,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646839570] [2021-01-06 09:42:23,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788901471] [2021-01-06 09:42:23,103 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 [2021-01-06 09:42:23,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:42:23,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:23,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 09:42:23,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:23,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 09:42:23,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:23,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 09:42:23,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67841314] [2021-01-06 09:42:23,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:42:23,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:23,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:42:23,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:42:23,224 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2021-01-06 09:42:23,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:23,310 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2021-01-06 09:42:23,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:42:23,311 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2021-01-06 09:42:23,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:23,312 INFO L225 Difference]: With dead ends: 50 [2021-01-06 09:42:23,312 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 09:42:23,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:42:23,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 09:42:23,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-01-06 09:42:23,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 09:42:23,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-01-06 09:42:23,320 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2021-01-06 09:42:23,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:23,321 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-01-06 09:42:23,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:42:23,321 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-01-06 09:42:23,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 09:42:23,322 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:23,323 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:23,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:23,539 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:23,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:23,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1993618671, now seen corresponding path program 3 times [2021-01-06 09:42:23,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:23,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155839639] [2021-01-06 09:42:23,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:23,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:23,616 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 09:42:23,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155839639] [2021-01-06 09:42:23,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561493881] [2021-01-06 09:42:23,618 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 [2021-01-06 09:42:23,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 09:42:23,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:23,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:42:23,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:23,736 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 09:42:23,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:23,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 09:42:23,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966197799] [2021-01-06 09:42:23,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 09:42:23,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:23,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 09:42:23,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:42:23,739 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 6 states. [2021-01-06 09:42:23,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:23,766 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2021-01-06 09:42:23,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 09:42:23,767 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2021-01-06 09:42:23,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:23,768 INFO L225 Difference]: With dead ends: 60 [2021-01-06 09:42:23,768 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 09:42:23,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:42:23,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 09:42:23,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-01-06 09:42:23,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 09:42:23,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-01-06 09:42:23,776 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 29 [2021-01-06 09:42:23,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:23,776 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-01-06 09:42:23,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 09:42:23,776 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-01-06 09:42:23,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 09:42:23,777 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:23,778 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:23,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:23,995 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:23,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:23,996 INFO L82 PathProgramCache]: Analyzing trace with hash 391245135, now seen corresponding path program 4 times [2021-01-06 09:42:23,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:23,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615166733] [2021-01-06 09:42:23,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:24,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:24,108 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 09:42:24,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615166733] [2021-01-06 09:42:24,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129741331] [2021-01-06 09:42:24,110 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 [2021-01-06 09:42:24,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:42:24,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:24,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:42:24,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:24,252 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 09:42:24,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:24,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 09:42:24,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114408132] [2021-01-06 09:42:24,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 09:42:24,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:24,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 09:42:24,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:42:24,255 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 7 states. [2021-01-06 09:42:24,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:24,287 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2021-01-06 09:42:24,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 09:42:24,288 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2021-01-06 09:42:24,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:24,289 INFO L225 Difference]: With dead ends: 62 [2021-01-06 09:42:24,289 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 09:42:24,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:42:24,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 09:42:24,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-01-06 09:42:24,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 09:42:24,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-01-06 09:42:24,298 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 31 [2021-01-06 09:42:24,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:24,299 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-01-06 09:42:24,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 09:42:24,299 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-01-06 09:42:24,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 09:42:24,300 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:24,300 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:24,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 09:42:24,516 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:24,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:24,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1267173363, now seen corresponding path program 5 times [2021-01-06 09:42:24,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:24,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217994457] [2021-01-06 09:42:24,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:24,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:24,650 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 09:42:24,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217994457] [2021-01-06 09:42:24,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711743212] [2021-01-06 09:42:24,651 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 [2021-01-06 09:42:24,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 09:42:24,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:24,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:42:24,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:24,976 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-01-06 09:42:24,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:24,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-01-06 09:42:24,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110536124] [2021-01-06 09:42:24,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 09:42:24,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:24,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 09:42:24,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-01-06 09:42:24,981 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 10 states. [2021-01-06 09:42:25,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:25,121 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2021-01-06 09:42:25,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 09:42:25,122 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2021-01-06 09:42:25,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:25,123 INFO L225 Difference]: With dead ends: 73 [2021-01-06 09:42:25,124 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 09:42:25,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-01-06 09:42:25,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 09:42:25,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2021-01-06 09:42:25,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 09:42:25,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2021-01-06 09:42:25,132 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 33 [2021-01-06 09:42:25,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:25,133 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2021-01-06 09:42:25,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 09:42:25,133 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2021-01-06 09:42:25,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 09:42:25,134 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:25,135 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:25,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:25,348 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:25,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:25,350 INFO L82 PathProgramCache]: Analyzing trace with hash -91572603, now seen corresponding path program 6 times [2021-01-06 09:42:25,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:25,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61794940] [2021-01-06 09:42:25,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:25,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:25,550 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-01-06 09:42:25,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61794940] [2021-01-06 09:42:25,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628086584] [2021-01-06 09:42:25,552 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:25,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-06 09:42:25,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:25,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:42:25,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:25,789 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-01-06 09:42:25,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:25,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-01-06 09:42:25,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214532066] [2021-01-06 09:42:25,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 09:42:25,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:25,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 09:42:25,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:42:25,792 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 12 states. [2021-01-06 09:42:25,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:25,923 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2021-01-06 09:42:25,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 09:42:25,924 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2021-01-06 09:42:25,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:25,925 INFO L225 Difference]: With dead ends: 87 [2021-01-06 09:42:25,925 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 09:42:25,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:42:25,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 09:42:25,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2021-01-06 09:42:25,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 09:42:25,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2021-01-06 09:42:25,934 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 41 [2021-01-06 09:42:25,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:25,934 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2021-01-06 09:42:25,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 09:42:25,934 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2021-01-06 09:42:25,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 09:42:25,936 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:25,936 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:26,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:26,151 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:26,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:26,154 INFO L82 PathProgramCache]: Analyzing trace with hash -673424131, now seen corresponding path program 7 times [2021-01-06 09:42:26,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:26,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347400834] [2021-01-06 09:42:26,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:26,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:26,378 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-01-06 09:42:26,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347400834] [2021-01-06 09:42:26,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260469858] [2021-01-06 09:42:26,384 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:26,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 09:42:26,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:26,579 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-01-06 09:42:26,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:26,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 09:42:26,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747059542] [2021-01-06 09:42:26,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 09:42:26,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:26,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 09:42:26,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 09:42:26,584 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 10 states. [2021-01-06 09:42:26,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:26,628 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2021-01-06 09:42:26,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 09:42:26,629 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 49 [2021-01-06 09:42:26,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:26,630 INFO L225 Difference]: With dead ends: 92 [2021-01-06 09:42:26,630 INFO L226 Difference]: Without dead ends: 55 [2021-01-06 09:42:26,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 09:42:26,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-01-06 09:42:26,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-01-06 09:42:26,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 09:42:26,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2021-01-06 09:42:26,644 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 49 [2021-01-06 09:42:26,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:26,645 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2021-01-06 09:42:26,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 09:42:26,646 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2021-01-06 09:42:26,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 09:42:26,649 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:26,649 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:26,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 09:42:26,865 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:26,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:26,867 INFO L82 PathProgramCache]: Analyzing trace with hash 883487803, now seen corresponding path program 8 times [2021-01-06 09:42:26,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:26,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861362313] [2021-01-06 09:42:26,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:26,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:27,005 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-01-06 09:42:27,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861362313] [2021-01-06 09:42:27,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592327968] [2021-01-06 09:42:27,006 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:27,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:42:27,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:27,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:42:27,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:27,222 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-01-06 09:42:27,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:27,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 09:42:27,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840667613] [2021-01-06 09:42:27,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 09:42:27,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:27,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 09:42:27,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:42:27,234 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 11 states. [2021-01-06 09:42:27,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:27,289 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2021-01-06 09:42:27,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 09:42:27,290 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2021-01-06 09:42:27,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:27,295 INFO L225 Difference]: With dead ends: 94 [2021-01-06 09:42:27,295 INFO L226 Difference]: Without dead ends: 57 [2021-01-06 09:42:27,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:42:27,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-01-06 09:42:27,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2021-01-06 09:42:27,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 09:42:27,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-01-06 09:42:27,309 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 51 [2021-01-06 09:42:27,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:27,309 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-01-06 09:42:27,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 09:42:27,310 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-01-06 09:42:27,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-06 09:42:27,310 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:27,311 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:27,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:27,525 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:27,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:27,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1867729927, now seen corresponding path program 9 times [2021-01-06 09:42:27,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:27,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40355786] [2021-01-06 09:42:27,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:27,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:27,667 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-01-06 09:42:27,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40355786] [2021-01-06 09:42:27,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151989642] [2021-01-06 09:42:27,668 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:27,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 09:42:27,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:27,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 09:42:27,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:28,027 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-01-06 09:42:28,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:28,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2021-01-06 09:42:28,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380722903] [2021-01-06 09:42:28,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 09:42:28,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:28,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 09:42:28,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-01-06 09:42:28,030 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 16 states. [2021-01-06 09:42:28,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:28,192 INFO L93 Difference]: Finished difference Result 105 states and 116 transitions. [2021-01-06 09:42:28,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 09:42:28,192 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2021-01-06 09:42:28,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:28,193 INFO L225 Difference]: With dead ends: 105 [2021-01-06 09:42:28,194 INFO L226 Difference]: Without dead ends: 68 [2021-01-06 09:42:28,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-01-06 09:42:28,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-01-06 09:42:28,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2021-01-06 09:42:28,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 09:42:28,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2021-01-06 09:42:28,201 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 53 [2021-01-06 09:42:28,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:28,202 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2021-01-06 09:42:28,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 09:42:28,202 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2021-01-06 09:42:28,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 09:42:28,203 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:28,203 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:28,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:28,418 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:28,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:28,419 INFO L82 PathProgramCache]: Analyzing trace with hash -179501455, now seen corresponding path program 10 times [2021-01-06 09:42:28,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:28,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031869468] [2021-01-06 09:42:28,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:28,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:28,561 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-01-06 09:42:28,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031869468] [2021-01-06 09:42:28,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234422909] [2021-01-06 09:42:28,562 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:28,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:42:28,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:28,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 09:42:28,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:28,755 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-01-06 09:42:28,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:28,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 09:42:28,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795442628] [2021-01-06 09:42:28,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 09:42:28,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:28,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 09:42:28,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:42:28,758 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 13 states. [2021-01-06 09:42:28,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:28,805 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2021-01-06 09:42:28,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 09:42:28,806 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2021-01-06 09:42:28,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:28,806 INFO L225 Difference]: With dead ends: 110 [2021-01-06 09:42:28,807 INFO L226 Difference]: Without dead ends: 67 [2021-01-06 09:42:28,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:42:28,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-01-06 09:42:28,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2021-01-06 09:42:28,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 09:42:28,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-01-06 09:42:28,823 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 61 [2021-01-06 09:42:28,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:28,824 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-01-06 09:42:28,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 09:42:28,824 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-01-06 09:42:28,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 09:42:28,825 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:28,825 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:29,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 09:42:29,040 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:29,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:29,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1934970705, now seen corresponding path program 11 times [2021-01-06 09:42:29,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:29,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283303889] [2021-01-06 09:42:29,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:29,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:29,235 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-01-06 09:42:29,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283303889] [2021-01-06 09:42:29,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142411655] [2021-01-06 09:42:29,236 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:39,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-01-06 09:42:39,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:39,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 09:42:39,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:39,964 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-01-06 09:42:39,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:39,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 19 [2021-01-06 09:42:39,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469486723] [2021-01-06 09:42:39,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 09:42:39,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:39,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 09:42:39,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-01-06 09:42:39,967 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 19 states. [2021-01-06 09:42:40,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:40,141 INFO L93 Difference]: Finished difference Result 121 states and 132 transitions. [2021-01-06 09:42:40,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 09:42:40,142 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 63 [2021-01-06 09:42:40,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:40,143 INFO L225 Difference]: With dead ends: 121 [2021-01-06 09:42:40,143 INFO L226 Difference]: Without dead ends: 78 [2021-01-06 09:42:40,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-01-06 09:42:40,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-01-06 09:42:40,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2021-01-06 09:42:40,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-01-06 09:42:40,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2021-01-06 09:42:40,150 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 63 [2021-01-06 09:42:40,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:40,151 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2021-01-06 09:42:40,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 09:42:40,151 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2021-01-06 09:42:40,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 09:42:40,152 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:40,152 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:40,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 09:42:40,353 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:40,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:40,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1964985639, now seen corresponding path program 12 times [2021-01-06 09:42:40,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:40,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854262008] [2021-01-06 09:42:40,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:40,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:40,528 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-01-06 09:42:40,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854262008] [2021-01-06 09:42:40,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172756465] [2021-01-06 09:42:40,529 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:41,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-01-06 09:42:41,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:41,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 09:42:41,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:42,109 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-01-06 09:42:42,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:42,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 09:42:42,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741818091] [2021-01-06 09:42:42,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 09:42:42,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:42,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 09:42:42,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 09:42:42,111 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 15 states. [2021-01-06 09:42:42,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:42,166 INFO L93 Difference]: Finished difference Result 126 states and 134 transitions. [2021-01-06 09:42:42,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 09:42:42,167 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 71 [2021-01-06 09:42:42,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:42,168 INFO L225 Difference]: With dead ends: 126 [2021-01-06 09:42:42,168 INFO L226 Difference]: Without dead ends: 77 [2021-01-06 09:42:42,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 09:42:42,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-01-06 09:42:42,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2021-01-06 09:42:42,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-01-06 09:42:42,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2021-01-06 09:42:42,174 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 71 [2021-01-06 09:42:42,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:42,174 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2021-01-06 09:42:42,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 09:42:42,175 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2021-01-06 09:42:42,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-01-06 09:42:42,175 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:42,175 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:42,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 09:42:42,389 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:42,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:42,390 INFO L82 PathProgramCache]: Analyzing trace with hash 710132197, now seen corresponding path program 13 times [2021-01-06 09:42:42,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:42,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054087569] [2021-01-06 09:42:42,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:42,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:42,587 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-01-06 09:42:42,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054087569] [2021-01-06 09:42:42,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925848952] [2021-01-06 09:42:42,588 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:42,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:42,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 09:42:42,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:42,746 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-01-06 09:42:42,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:42,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 09:42:42,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678191008] [2021-01-06 09:42:42,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 09:42:42,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:42,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 09:42:42,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 09:42:42,748 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 16 states. [2021-01-06 09:42:42,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:42,807 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2021-01-06 09:42:42,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 09:42:42,808 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2021-01-06 09:42:42,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:42,808 INFO L225 Difference]: With dead ends: 128 [2021-01-06 09:42:42,809 INFO L226 Difference]: Without dead ends: 79 [2021-01-06 09:42:42,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 09:42:42,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-01-06 09:42:42,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2021-01-06 09:42:42,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-01-06 09:42:42,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2021-01-06 09:42:42,814 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 73 [2021-01-06 09:42:42,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:42,814 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2021-01-06 09:42:42,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 09:42:42,815 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2021-01-06 09:42:42,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-01-06 09:42:42,815 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:42,815 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:43,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:43,030 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:43,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:43,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1681784611, now seen corresponding path program 14 times [2021-01-06 09:42:43,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:43,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089552860] [2021-01-06 09:42:43,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:43,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:43,244 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-01-06 09:42:43,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089552860] [2021-01-06 09:42:43,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702812308] [2021-01-06 09:42:43,247 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:43,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:42:43,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:43,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 09:42:43,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:43,443 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-01-06 09:42:43,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:43,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 09:42:43,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788634332] [2021-01-06 09:42:43,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 09:42:43,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:43,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 09:42:43,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 09:42:43,446 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 17 states. [2021-01-06 09:42:43,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:43,507 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2021-01-06 09:42:43,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 09:42:43,508 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 75 [2021-01-06 09:42:43,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:43,510 INFO L225 Difference]: With dead ends: 130 [2021-01-06 09:42:43,511 INFO L226 Difference]: Without dead ends: 81 [2021-01-06 09:42:43,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 09:42:43,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-01-06 09:42:43,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2021-01-06 09:42:43,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-01-06 09:42:43,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2021-01-06 09:42:43,520 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 75 [2021-01-06 09:42:43,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:43,520 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2021-01-06 09:42:43,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 09:42:43,521 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2021-01-06 09:42:43,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-01-06 09:42:43,521 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:43,522 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:43,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 09:42:43,736 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:43,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:43,737 INFO L82 PathProgramCache]: Analyzing trace with hash -863116063, now seen corresponding path program 15 times [2021-01-06 09:42:43,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:43,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338788896] [2021-01-06 09:42:43,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:43,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:43,937 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-01-06 09:42:43,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338788896] [2021-01-06 09:42:43,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134893368] [2021-01-06 09:42:43,938 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:44,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 09:42:44,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:44,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 09:42:44,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:44,938 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-01-06 09:42:44,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:44,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 24 [2021-01-06 09:42:44,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187873865] [2021-01-06 09:42:44,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 09:42:44,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:44,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 09:42:44,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2021-01-06 09:42:44,941 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 24 states. [2021-01-06 09:42:45,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:45,159 INFO L93 Difference]: Finished difference Result 141 states and 152 transitions. [2021-01-06 09:42:45,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 09:42:45,159 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 77 [2021-01-06 09:42:45,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:45,160 INFO L225 Difference]: With dead ends: 141 [2021-01-06 09:42:45,160 INFO L226 Difference]: Without dead ends: 92 [2021-01-06 09:42:45,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2021-01-06 09:42:45,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-01-06 09:42:45,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2021-01-06 09:42:45,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-01-06 09:42:45,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2021-01-06 09:42:45,166 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 77 [2021-01-06 09:42:45,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:45,166 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2021-01-06 09:42:45,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 09:42:45,166 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2021-01-06 09:42:45,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-01-06 09:42:45,167 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:45,167 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:45,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 09:42:45,383 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:45,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:45,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1641705639, now seen corresponding path program 16 times [2021-01-06 09:42:45,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:45,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049726331] [2021-01-06 09:42:45,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:45,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:45,601 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-01-06 09:42:45,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049726331] [2021-01-06 09:42:45,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885146385] [2021-01-06 09:42:45,602 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:45,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:42:45,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:45,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 09:42:45,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:45,822 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-01-06 09:42:45,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:45,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 09:42:45,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039118792] [2021-01-06 09:42:45,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 09:42:45,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:45,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 09:42:45,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 09:42:45,825 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 19 states. [2021-01-06 09:42:45,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:45,894 INFO L93 Difference]: Finished difference Result 146 states and 154 transitions. [2021-01-06 09:42:45,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 09:42:45,895 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 85 [2021-01-06 09:42:45,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:45,896 INFO L225 Difference]: With dead ends: 146 [2021-01-06 09:42:45,896 INFO L226 Difference]: Without dead ends: 91 [2021-01-06 09:42:45,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 09:42:45,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-01-06 09:42:45,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2021-01-06 09:42:45,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2021-01-06 09:42:45,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2021-01-06 09:42:45,901 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 85 [2021-01-06 09:42:45,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:45,901 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2021-01-06 09:42:45,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 09:42:45,901 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2021-01-06 09:42:45,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-01-06 09:42:45,902 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:45,902 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:46,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 09:42:46,117 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:46,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:46,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1163386775, now seen corresponding path program 17 times [2021-01-06 09:42:46,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:46,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833173176] [2021-01-06 09:42:46,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:46,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:46,384 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-01-06 09:42:46,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833173176] [2021-01-06 09:42:46,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657613127] [2021-01-06 09:42:46,385 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:45:23,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-01-06 09:45:23,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:45:23,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:45:23,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:45:23,631 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2021-01-06 09:45:23,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:45:23,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 27 [2021-01-06 09:45:23,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97770117] [2021-01-06 09:45:23,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 09:45:23,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:45:23,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 09:45:23,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2021-01-06 09:45:23,635 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand 27 states. [2021-01-06 09:45:23,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:45:23,919 INFO L93 Difference]: Finished difference Result 157 states and 168 transitions. [2021-01-06 09:45:23,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 09:45:23,920 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 87 [2021-01-06 09:45:23,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:45:23,920 INFO L225 Difference]: With dead ends: 157 [2021-01-06 09:45:23,920 INFO L226 Difference]: Without dead ends: 102 [2021-01-06 09:45:23,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2021-01-06 09:45:23,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-01-06 09:45:23,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2021-01-06 09:45:23,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-01-06 09:45:23,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2021-01-06 09:45:23,926 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 87 [2021-01-06 09:45:23,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:45:23,927 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2021-01-06 09:45:23,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 09:45:23,927 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2021-01-06 09:45:23,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-01-06 09:45:23,928 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:45:23,928 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:45:24,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:45:24,143 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:45:24,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:45:24,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1568287729, now seen corresponding path program 18 times [2021-01-06 09:45:24,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:45:24,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097274673] [2021-01-06 09:45:24,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:45:24,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:45:24,443 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-01-06 09:45:24,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097274673] [2021-01-06 09:45:24,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824359724] [2021-01-06 09:45:24,444 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:45:32,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-01-06 09:45:32,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:45:32,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 09:45:32,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:45:32,405 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2021-01-06 09:45:32,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:45:32,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11] total 29 [2021-01-06 09:45:32,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665482598] [2021-01-06 09:45:32,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 09:45:32,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:45:32,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 09:45:32,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=568, Unknown=0, NotChecked=0, Total=812 [2021-01-06 09:45:32,409 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand 29 states. [2021-01-06 09:45:32,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:45:32,678 INFO L93 Difference]: Finished difference Result 171 states and 182 transitions. [2021-01-06 09:45:32,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 09:45:32,678 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 95 [2021-01-06 09:45:32,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:45:32,679 INFO L225 Difference]: With dead ends: 171 [2021-01-06 09:45:32,679 INFO L226 Difference]: Without dead ends: 110 [2021-01-06 09:45:32,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=244, Invalid=568, Unknown=0, NotChecked=0, Total=812 [2021-01-06 09:45:32,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-01-06 09:45:32,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 106. [2021-01-06 09:45:32,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2021-01-06 09:45:32,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2021-01-06 09:45:32,685 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 95 [2021-01-06 09:45:32,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:45:32,686 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2021-01-06 09:45:32,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 09:45:32,686 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2021-01-06 09:45:32,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-01-06 09:45:32,687 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:45:32,687 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:45:32,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:45:32,888 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:45:32,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:45:32,889 INFO L82 PathProgramCache]: Analyzing trace with hash -580046713, now seen corresponding path program 19 times [2021-01-06 09:45:32,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:45:32,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883868663] [2021-01-06 09:45:32,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:45:32,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:45:33,230 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2021-01-06 09:45:33,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883868663] [2021-01-06 09:45:33,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457219157] [2021-01-06 09:45:33,231 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:45:33,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:45:33,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 09:45:33,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:45:33,540 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2021-01-06 09:45:33,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:45:33,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 09:45:33,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574381442] [2021-01-06 09:45:33,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 09:45:33,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:45:33,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 09:45:33,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 09:45:33,543 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand 22 states. [2021-01-06 09:45:33,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:45:33,652 INFO L93 Difference]: Finished difference Result 176 states and 184 transitions. [2021-01-06 09:45:33,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 09:45:33,652 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 103 [2021-01-06 09:45:33,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:45:33,653 INFO L225 Difference]: With dead ends: 176 [2021-01-06 09:45:33,653 INFO L226 Difference]: Without dead ends: 109 [2021-01-06 09:45:33,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 09:45:33,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-01-06 09:45:33,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2021-01-06 09:45:33,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2021-01-06 09:45:33,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2021-01-06 09:45:33,659 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 103 [2021-01-06 09:45:33,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:45:33,659 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2021-01-06 09:45:33,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 09:45:33,659 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2021-01-06 09:45:33,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-01-06 09:45:33,660 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:45:33,660 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:45:33,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 09:45:33,874 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:45:33,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:45:33,875 INFO L82 PathProgramCache]: Analyzing trace with hash -370201275, now seen corresponding path program 20 times [2021-01-06 09:45:33,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:45:33,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115583033] [2021-01-06 09:45:33,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:45:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:45:34,257 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2021-01-06 09:45:34,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115583033] [2021-01-06 09:45:34,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557997245] [2021-01-06 09:45:34,258 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:45:34,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:45:34,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:45:34,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 09:45:34,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:45:34,477 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2021-01-06 09:45:34,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:45:34,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 09:45:34,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745723961] [2021-01-06 09:45:34,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 09:45:34,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:45:34,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 09:45:34,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 09:45:34,480 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 23 states. [2021-01-06 09:45:34,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:45:34,555 INFO L93 Difference]: Finished difference Result 178 states and 186 transitions. [2021-01-06 09:45:34,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 09:45:34,559 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 105 [2021-01-06 09:45:34,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:45:34,560 INFO L225 Difference]: With dead ends: 178 [2021-01-06 09:45:34,560 INFO L226 Difference]: Without dead ends: 111 [2021-01-06 09:45:34,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 09:45:34,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-01-06 09:45:34,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2021-01-06 09:45:34,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2021-01-06 09:45:34,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2021-01-06 09:45:34,565 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 105 [2021-01-06 09:45:34,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:45:34,566 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2021-01-06 09:45:34,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 09:45:34,566 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2021-01-06 09:45:34,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-01-06 09:45:34,567 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:45:34,567 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:45:34,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 09:45:34,781 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:45:34,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:45:34,781 INFO L82 PathProgramCache]: Analyzing trace with hash -572198269, now seen corresponding path program 21 times [2021-01-06 09:45:34,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:45:34,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324028919] [2021-01-06 09:45:34,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:45:34,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:45:35,146 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2021-01-06 09:45:35,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324028919] [2021-01-06 09:45:35,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865535124] [2021-01-06 09:45:35,147 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:45:38,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 09:45:38,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:45:38,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 09:45:38,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:45:38,683 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 562 trivial. 0 not checked. [2021-01-06 09:45:38,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:45:38,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 33 [2021-01-06 09:45:38,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729268259] [2021-01-06 09:45:38,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 09:45:38,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:45:38,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 09:45:38,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=738, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 09:45:38,688 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand 33 states. [2021-01-06 09:45:39,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:45:39,004 INFO L93 Difference]: Finished difference Result 189 states and 200 transitions. [2021-01-06 09:45:39,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 09:45:39,005 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 107 [2021-01-06 09:45:39,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:45:39,006 INFO L225 Difference]: With dead ends: 189 [2021-01-06 09:45:39,006 INFO L226 Difference]: Without dead ends: 122 [2021-01-06 09:45:39,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=318, Invalid=738, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 09:45:39,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-01-06 09:45:39,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 118. [2021-01-06 09:45:39,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2021-01-06 09:45:39,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2021-01-06 09:45:39,012 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 107 [2021-01-06 09:45:39,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:45:39,012 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2021-01-06 09:45:39,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 09:45:39,013 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2021-01-06 09:45:39,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-01-06 09:45:39,014 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:45:39,014 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:45:39,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:45:39,229 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:45:39,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:45:39,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1980105989, now seen corresponding path program 22 times [2021-01-06 09:45:39,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:45:39,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658485571] [2021-01-06 09:45:39,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:45:39,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:45:39,648 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-01-06 09:45:39,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658485571] [2021-01-06 09:45:39,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183150898] [2021-01-06 09:45:39,648 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:45:39,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:45:39,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:45:39,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 09:45:39,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:45:39,877 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-01-06 09:45:39,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:45:39,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-01-06 09:45:39,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940114116] [2021-01-06 09:45:39,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 09:45:39,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:45:39,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 09:45:39,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 09:45:39,880 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand 25 states. [2021-01-06 09:45:39,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:45:39,958 INFO L93 Difference]: Finished difference Result 194 states and 202 transitions. [2021-01-06 09:45:39,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 09:45:39,959 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 115 [2021-01-06 09:45:39,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:45:39,960 INFO L225 Difference]: With dead ends: 194 [2021-01-06 09:45:39,960 INFO L226 Difference]: Without dead ends: 121 [2021-01-06 09:45:39,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 09:45:39,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-01-06 09:45:39,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2021-01-06 09:45:39,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2021-01-06 09:45:39,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2021-01-06 09:45:39,965 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 115 [2021-01-06 09:45:39,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:45:39,966 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2021-01-06 09:45:39,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 09:45:39,966 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2021-01-06 09:45:39,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-01-06 09:45:39,967 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:45:39,967 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:45:40,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 09:45:40,180 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:45:40,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:45:40,181 INFO L82 PathProgramCache]: Analyzing trace with hash -593442119, now seen corresponding path program 23 times [2021-01-06 09:45:40,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:45:40,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814305417] [2021-01-06 09:45:40,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:45:40,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:45:40,577 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-01-06 09:45:40,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814305417] [2021-01-06 09:45:40,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274052252] [2021-01-06 09:45:40,577 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true