/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-crafted/zero_sum_m4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:52:10,851 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:52:10,855 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:52:10,896 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:52:10,900 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:52:10,902 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:52:10,905 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:52:10,912 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:52:10,915 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:52:10,917 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:52:10,922 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:52:10,924 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:52:10,926 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:52:10,933 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:52:10,935 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:52:10,938 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:52:10,957 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:52:10,965 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:52:10,970 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:52:10,977 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:52:10,981 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:52:10,984 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:52:10,989 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:52:10,994 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:52:11,002 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:52:11,025 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:52:11,030 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:52:11,032 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:52:11,033 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 00:52:11,066 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:52:11,067 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:52:11,069 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:52:11,069 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:52:11,069 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:52:11,070 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:52:11,070 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:52:11,070 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:52:11,071 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:52:11,071 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:52:11,071 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:52:11,072 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:52:11,072 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:52:11,072 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:52:11,072 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:52:11,072 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:52:11,073 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:52:11,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:52:11,073 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:52:11,073 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:52:11,074 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:52:11,074 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:52:11,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:52:11,074 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:52:11,075 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:52:11,075 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:52:11,524 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:52:11,561 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:52:11,565 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:52:11,567 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:52:11,567 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:52:11,569 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_m4.c [2020-12-23 00:52:11,665 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/614dab9f6/55538430a0884bb080aa5d37a2adb316/FLAG3f643a974 [2020-12-23 00:52:12,309 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:52:12,310 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_m4.c [2020-12-23 00:52:12,319 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/614dab9f6/55538430a0884bb080aa5d37a2adb316/FLAG3f643a974 [2020-12-23 00:52:12,642 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/614dab9f6/55538430a0884bb080aa5d37a2adb316 [2020-12-23 00:52:12,645 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:52:12,648 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:52:12,651 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:52:12,651 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:52:12,660 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:52:12,664 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:52:12" (1/1) ... [2020-12-23 00:52:12,666 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cb21864 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:12, skipping insertion in model container [2020-12-23 00:52:12,667 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:52:12" (1/1) ... [2020-12-23 00:52:12,680 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:52:12,710 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:52:12,878 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_m4.c[402,415] left hand side expression in assignment: lhs: VariableLHS[~SIZE~0,GLOBAL] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~1,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] [2020-12-23 00:52:12,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:52:12,928 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:52:12,947 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_m4.c[402,415] left hand side expression in assignment: lhs: VariableLHS[~SIZE~0,GLOBAL] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[2],IdentifierExpression[~i~1,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sum~0,] [2020-12-23 00:52:12,966 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:52:12,988 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:52:12,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:12 WrapperNode [2020-12-23 00:52:12,989 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:52:12,990 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:52:12,991 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:52:12,991 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:52:13,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:12" (1/1) ... [2020-12-23 00:52:13,017 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:12" (1/1) ... [2020-12-23 00:52:13,051 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:52:13,052 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:52:13,053 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:52:13,053 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:52:13,066 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:12" (1/1) ... [2020-12-23 00:52:13,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:12" (1/1) ... [2020-12-23 00:52:13,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:12" (1/1) ... [2020-12-23 00:52:13,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:12" (1/1) ... [2020-12-23 00:52:13,077 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:12" (1/1) ... [2020-12-23 00:52:13,085 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:12" (1/1) ... [2020-12-23 00:52:13,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:12" (1/1) ... [2020-12-23 00:52:13,091 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:52:13,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:52:13,092 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:52:13,093 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:52:13,094 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:12" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:52:13,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:52:13,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:52:13,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:52:13,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:52:13,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:52:13,226 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:52:13,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:52:14,011 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:52:14,012 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2020-12-23 00:52:14,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:52:14 BoogieIcfgContainer [2020-12-23 00:52:14,015 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:52:14,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:52:14,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:52:14,023 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:52:14,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:52:12" (1/3) ... [2020-12-23 00:52:14,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15643f84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:52:14, skipping insertion in model container [2020-12-23 00:52:14,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:52:12" (2/3) ... [2020-12-23 00:52:14,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15643f84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:52:14, skipping insertion in model container [2020-12-23 00:52:14,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:52:14" (3/3) ... [2020-12-23 00:52:14,030 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_m4.c [2020-12-23 00:52:14,040 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:52:14,049 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:52:14,079 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:52:14,116 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:52:14,116 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:52:14,117 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:52:14,117 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:52:14,117 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:52:14,117 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:52:14,117 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:52:14,118 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:52:14,137 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-12-23 00:52:14,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 00:52:14,145 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:52:14,146 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:52:14,147 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:52:14,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:52:14,156 INFO L82 PathProgramCache]: Analyzing trace with hash -2094998668, now seen corresponding path program 1 times [2020-12-23 00:52:14,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:52:14,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549833211] [2020-12-23 00:52:14,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:52:14,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:52:14,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:52:14,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549833211] [2020-12-23 00:52:14,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:52:14,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:52:14,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322087253] [2020-12-23 00:52:14,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:52:14,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:52:14,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:52:14,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:52:14,419 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 2 states. [2020-12-23 00:52:14,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:52:14,449 INFO L93 Difference]: Finished difference Result 71 states and 106 transitions. [2020-12-23 00:52:14,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:52:14,451 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 23 [2020-12-23 00:52:14,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:52:14,464 INFO L225 Difference]: With dead ends: 71 [2020-12-23 00:52:14,464 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 00:52:14,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:52:14,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 00:52:14,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-23 00:52:14,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 00:52:14,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2020-12-23 00:52:14,518 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 23 [2020-12-23 00:52:14,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:52:14,519 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2020-12-23 00:52:14,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:52:14,519 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2020-12-23 00:52:14,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 00:52:14,520 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:52:14,520 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:52:14,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:52:14,521 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:52:14,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:52:14,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1680934388, now seen corresponding path program 1 times [2020-12-23 00:52:14,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:52:14,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417643532] [2020-12-23 00:52:14,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:52:14,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:52:14,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:52:14,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417643532] [2020-12-23 00:52:14,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:52:14,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:52:14,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440313429] [2020-12-23 00:52:14,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:52:14,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:52:14,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:52:14,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:52:14,660 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand 3 states. [2020-12-23 00:52:14,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:52:14,762 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2020-12-23 00:52:14,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:52:14,763 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-12-23 00:52:14,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:52:14,765 INFO L225 Difference]: With dead ends: 63 [2020-12-23 00:52:14,765 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 00:52:14,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:52:14,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 00:52:14,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-12-23 00:52:14,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 00:52:14,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2020-12-23 00:52:14,783 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 23 [2020-12-23 00:52:14,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:52:14,784 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2020-12-23 00:52:14,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:52:14,784 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2020-12-23 00:52:14,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 00:52:14,787 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:52:14,788 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:52:14,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 00:52:14,788 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:52:14,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:52:14,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1381660206, now seen corresponding path program 1 times [2020-12-23 00:52:14,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:52:14,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163142016] [2020-12-23 00:52:14,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:52:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:52:14,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:52:14,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163142016] [2020-12-23 00:52:14,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:52:14,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:52:14,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316925881] [2020-12-23 00:52:14,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:52:14,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:52:14,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:52:14,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:52:14,949 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand 4 states. [2020-12-23 00:52:15,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:52:15,114 INFO L93 Difference]: Finished difference Result 75 states and 97 transitions. [2020-12-23 00:52:15,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:52:15,114 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-12-23 00:52:15,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:52:15,116 INFO L225 Difference]: With dead ends: 75 [2020-12-23 00:52:15,116 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 00:52:15,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:52:15,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 00:52:15,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-12-23 00:52:15,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 00:52:15,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-12-23 00:52:15,128 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 25 [2020-12-23 00:52:15,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:52:15,129 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-12-23 00:52:15,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:52:15,129 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-12-23 00:52:15,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 00:52:15,131 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:52:15,131 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:52:15,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 00:52:15,132 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:52:15,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:52:15,133 INFO L82 PathProgramCache]: Analyzing trace with hash -158323138, now seen corresponding path program 1 times [2020-12-23 00:52:15,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:52:15,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213283396] [2020-12-23 00:52:15,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:52:15,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:52:15,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 00:52:15,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213283396] [2020-12-23 00:52:15,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987040694] [2020-12-23 00:52:15,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:52:15,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:52:15,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:52:15,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:52:15,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 00:52:15,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:52:15,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-23 00:52:15,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283418495] [2020-12-23 00:52:15,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:52:15,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:52:15,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:52:15,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:52:15,626 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 6 states. [2020-12-23 00:52:15,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:52:15,770 INFO L93 Difference]: Finished difference Result 81 states and 97 transitions. [2020-12-23 00:52:15,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:52:15,771 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-12-23 00:52:15,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:52:15,772 INFO L225 Difference]: With dead ends: 81 [2020-12-23 00:52:15,772 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 00:52:15,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:52:15,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 00:52:15,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-12-23 00:52:15,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 00:52:15,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-12-23 00:52:15,783 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 41 [2020-12-23 00:52:15,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:52:15,783 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-12-23 00:52:15,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:52:15,784 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-12-23 00:52:15,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 00:52:15,785 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:52:15,785 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:52:16,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:52:16,001 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:52:16,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:52:16,003 INFO L82 PathProgramCache]: Analyzing trace with hash 408266208, now seen corresponding path program 2 times [2020-12-23 00:52:16,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:52:16,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391943306] [2020-12-23 00:52:16,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:52:16,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:52:16,113 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-23 00:52:16,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391943306] [2020-12-23 00:52:16,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146209604] [2020-12-23 00:52:16,115 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:52:16,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:52:16,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:52:16,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:52:16,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:52:16,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-23 00:52:16,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:52:16,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-12-23 00:52:16,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872169746] [2020-12-23 00:52:16,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:52:16,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:52:16,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:52:16,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:52:16,294 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 7 states. [2020-12-23 00:52:16,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:52:16,525 INFO L93 Difference]: Finished difference Result 100 states and 122 transitions. [2020-12-23 00:52:16,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:52:16,526 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2020-12-23 00:52:16,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:52:16,527 INFO L225 Difference]: With dead ends: 100 [2020-12-23 00:52:16,527 INFO L226 Difference]: Without dead ends: 68 [2020-12-23 00:52:16,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:52:16,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-23 00:52:16,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2020-12-23 00:52:16,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 00:52:16,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2020-12-23 00:52:16,539 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 43 [2020-12-23 00:52:16,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:52:16,539 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2020-12-23 00:52:16,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:52:16,539 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2020-12-23 00:52:16,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-23 00:52:16,541 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:52:16,542 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:52:16,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:52:16,756 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:52:16,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:52:16,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1004340752, now seen corresponding path program 3 times [2020-12-23 00:52:16,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:52:16,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365851319] [2020-12-23 00:52:16,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:52:16,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:52:20,589 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:52:20,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365851319] [2020-12-23 00:52:20,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10771587] [2020-12-23 00:52:20,590 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:52:20,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 00:52:20,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:52:20,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 86 conjunts are in the unsatisfiable core [2020-12-23 00:52:20,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:52:30,808 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:52:30,809 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2020-12-23 00:52:30,813 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2020-12-23 00:52:30,828 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:52:30,831 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:52:30,836 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:52:30,837 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:31 [2020-12-23 00:52:31,052 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:52:31,250 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:52:31,252 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:52:31,333 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:52:31,544 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:52:31,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:52:31,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 47] total 80 [2020-12-23 00:52:31,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565534987] [2020-12-23 00:52:31,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-12-23 00:52:31,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:52:31,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-12-23 00:52:31,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=6047, Unknown=0, NotChecked=0, Total=6320 [2020-12-23 00:52:31,554 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand 80 states. [2020-12-23 00:52:50,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:52:50,336 INFO L93 Difference]: Finished difference Result 169 states and 193 transitions. [2020-12-23 00:52:50,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-23 00:52:50,338 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 59 [2020-12-23 00:52:50,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:52:50,341 INFO L225 Difference]: With dead ends: 169 [2020-12-23 00:52:50,341 INFO L226 Difference]: Without dead ends: 163 [2020-12-23 00:52:50,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 16 SyntacticMatches, 10 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2566 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=440, Invalid=10066, Unknown=0, NotChecked=0, Total=10506 [2020-12-23 00:52:50,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-12-23 00:52:50,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 101. [2020-12-23 00:52:50,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-23 00:52:50,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 116 transitions. [2020-12-23 00:52:50,376 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 116 transitions. Word has length 59 [2020-12-23 00:52:50,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:52:50,376 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 116 transitions. [2020-12-23 00:52:50,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-12-23 00:52:50,377 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 116 transitions. [2020-12-23 00:52:50,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-23 00:52:50,381 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:52:50,382 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:52:50,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:52:50,599 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:52:50,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:52:50,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1580077422, now seen corresponding path program 4 times [2020-12-23 00:52:50,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:52:50,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874499788] [2020-12-23 00:52:50,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:52:50,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:52:50,736 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-23 00:52:50,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874499788] [2020-12-23 00:52:50,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761975899] [2020-12-23 00:52:50,737 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:52:50,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:52:50,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:52:50,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:52:50,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:52:50,981 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-23 00:52:50,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:52:50,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-12-23 00:52:50,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673533860] [2020-12-23 00:52:50,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:52:50,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:52:50,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:52:50,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:52:50,984 INFO L87 Difference]: Start difference. First operand 101 states and 116 transitions. Second operand 13 states. [2020-12-23 00:52:51,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:52:51,541 INFO L93 Difference]: Finished difference Result 200 states and 230 transitions. [2020-12-23 00:52:51,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:52:51,542 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-12-23 00:52:51,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:52:51,547 INFO L225 Difference]: With dead ends: 200 [2020-12-23 00:52:51,547 INFO L226 Difference]: Without dead ends: 104 [2020-12-23 00:52:51,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:52:51,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-23 00:52:51,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-12-23 00:52:51,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-23 00:52:51,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2020-12-23 00:52:51,583 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 61 [2020-12-23 00:52:51,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:52:51,584 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2020-12-23 00:52:51,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:52:51,584 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2020-12-23 00:52:51,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 00:52:51,591 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:52:51,591 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:52:51,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:52:51,806 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:52:51,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:52:51,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1107378484, now seen corresponding path program 5 times [2020-12-23 00:52:51,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:52:51,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057333722] [2020-12-23 00:52:51,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:52:51,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:52:51,917 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-12-23 00:52:51,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057333722] [2020-12-23 00:52:51,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535208417] [2020-12-23 00:52:51,918 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:52:52,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 00:52:52,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:52:52,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:52:52,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:52:52,220 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-12-23 00:52:52,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:52:52,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2020-12-23 00:52:52,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383682902] [2020-12-23 00:52:52,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:52:52,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:52:52,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:52:52,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:52:52,223 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand 13 states. [2020-12-23 00:52:52,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:52:52,704 INFO L93 Difference]: Finished difference Result 167 states and 195 transitions. [2020-12-23 00:52:52,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:52:52,705 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 63 [2020-12-23 00:52:52,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:52:52,706 INFO L225 Difference]: With dead ends: 167 [2020-12-23 00:52:52,706 INFO L226 Difference]: Without dead ends: 86 [2020-12-23 00:52:52,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:52:52,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-23 00:52:52,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2020-12-23 00:52:52,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-23 00:52:52,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2020-12-23 00:52:52,717 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 63 [2020-12-23 00:52:52,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:52:52,718 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2020-12-23 00:52:52,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:52:52,718 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2020-12-23 00:52:52,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-23 00:52:52,719 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:52:52,720 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:52:52,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:52:52,925 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:52:52,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:52:52,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1152417058, now seen corresponding path program 6 times [2020-12-23 00:52:52,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:52:52,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945901300] [2020-12-23 00:52:52,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:52:53,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:52:55,041 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-12-23 00:52:55,964 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-12-23 00:53:02,347 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:53:02,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945901300] [2020-12-23 00:53:02,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56192743] [2020-12-23 00:53:02,349 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:02,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-23 00:53:02,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:53:02,447 WARN L261 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 116 conjunts are in the unsatisfiable core [2020-12-23 00:53:02,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:53:16,604 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:53:16,889 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:53:16,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:53:16,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 57] total 107 [2020-12-23 00:53:16,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452569606] [2020-12-23 00:53:16,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 107 states [2020-12-23 00:53:16,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:16,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2020-12-23 00:53:16,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=652, Invalid=10690, Unknown=0, NotChecked=0, Total=11342 [2020-12-23 00:53:16,896 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand 107 states. [2020-12-23 00:53:20,545 WARN L197 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 70 [2020-12-23 00:53:21,252 WARN L197 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 87 [2020-12-23 00:53:22,500 WARN L197 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 61 [2020-12-23 00:53:23,774 WARN L197 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 84 [2020-12-23 00:53:27,524 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 43 [2020-12-23 00:53:28,498 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2020-12-23 00:53:30,043 WARN L197 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 78 [2020-12-23 00:53:31,122 WARN L197 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 66 [2020-12-23 00:53:33,984 WARN L197 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 73 [2020-12-23 00:53:35,089 WARN L197 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 92 [2020-12-23 00:53:38,685 WARN L197 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 83 [2020-12-23 00:53:39,553 WARN L197 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 76 [2020-12-23 00:53:42,802 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2020-12-23 00:53:43,543 WARN L197 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 73 [2020-12-23 00:53:44,138 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2020-12-23 00:53:44,930 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2020-12-23 00:53:45,603 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2020-12-23 00:53:49,158 WARN L197 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 72 [2020-12-23 00:53:53,637 WARN L197 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2020-12-23 00:53:56,525 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 23 [2020-12-23 00:53:57,329 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 28 [2020-12-23 00:54:00,800 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-12-23 00:54:02,583 WARN L197 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 86 [2020-12-23 00:54:02,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:54:02,737 INFO L93 Difference]: Finished difference Result 224 states and 249 transitions. [2020-12-23 00:54:02,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-12-23 00:54:02,739 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 77 [2020-12-23 00:54:02,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:54:02,741 INFO L225 Difference]: With dead ends: 224 [2020-12-23 00:54:02,741 INFO L226 Difference]: Without dead ends: 153 [2020-12-23 00:54:02,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7066 ImplicationChecksByTransitivity, 41.0s TimeCoverageRelationStatistics Valid=1477, Invalid=22703, Unknown=0, NotChecked=0, Total=24180 [2020-12-23 00:54:02,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-12-23 00:54:02,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 141. [2020-12-23 00:54:02,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-12-23 00:54:02,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 152 transitions. [2020-12-23 00:54:02,779 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 152 transitions. Word has length 77 [2020-12-23 00:54:02,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:54:02,782 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 152 transitions. [2020-12-23 00:54:02,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 107 states. [2020-12-23 00:54:02,782 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 152 transitions. [2020-12-23 00:54:02,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-23 00:54:02,790 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:54:02,790 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:54:02,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:54:02,994 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:54:02,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:54:02,995 INFO L82 PathProgramCache]: Analyzing trace with hash -575533628, now seen corresponding path program 7 times [2020-12-23 00:54:02,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:54:02,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517307579] [2020-12-23 00:54:02,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:54:03,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:54:03,191 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-12-23 00:54:03,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517307579] [2020-12-23 00:54:03,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850319373] [2020-12-23 00:54:03,193 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:54:03,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:54:03,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:54:03,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:54:03,595 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-12-23 00:54:03,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:54:03,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2020-12-23 00:54:03,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425856197] [2020-12-23 00:54:03,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 00:54:03,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:54:03,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 00:54:03,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:54:03,597 INFO L87 Difference]: Start difference. First operand 141 states and 152 transitions. Second operand 16 states. [2020-12-23 00:54:04,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:54:04,584 INFO L93 Difference]: Finished difference Result 252 states and 270 transitions. [2020-12-23 00:54:04,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 00:54:04,586 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-12-23 00:54:04,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:54:04,591 INFO L225 Difference]: With dead ends: 252 [2020-12-23 00:54:04,592 INFO L226 Difference]: Without dead ends: 134 [2020-12-23 00:54:04,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:54:04,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-23 00:54:04,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2020-12-23 00:54:04,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-12-23 00:54:04,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions. [2020-12-23 00:54:04,606 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 79 [2020-12-23 00:54:04,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:54:04,606 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions. [2020-12-23 00:54:04,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 00:54:04,607 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions. [2020-12-23 00:54:04,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-23 00:54:04,607 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:54:04,608 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:54:04,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 00:54:04,817 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:54:04,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:54:04,818 INFO L82 PathProgramCache]: Analyzing trace with hash 692239334, now seen corresponding path program 8 times [2020-12-23 00:54:04,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:54:04,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729354647] [2020-12-23 00:54:04,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:54:04,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:54:05,027 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 00:54:05,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729354647] [2020-12-23 00:54:05,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793915925] [2020-12-23 00:54:05,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:54:05,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:54:05,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:54:05,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:54:05,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:54:05,464 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 00:54:05,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:54:05,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2020-12-23 00:54:05,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847533422] [2020-12-23 00:54:05,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 00:54:05,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:54:05,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 00:54:05,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:54:05,471 INFO L87 Difference]: Start difference. First operand 133 states and 143 transitions. Second operand 16 states. [2020-12-23 00:54:06,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:54:06,448 INFO L93 Difference]: Finished difference Result 209 states and 232 transitions. [2020-12-23 00:54:06,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:54:06,449 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 81 [2020-12-23 00:54:06,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:54:06,451 INFO L225 Difference]: With dead ends: 209 [2020-12-23 00:54:06,451 INFO L226 Difference]: Without dead ends: 104 [2020-12-23 00:54:06,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:54:06,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-23 00:54:06,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 96. [2020-12-23 00:54:06,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-23 00:54:06,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2020-12-23 00:54:06,458 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 81 [2020-12-23 00:54:06,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:54:06,459 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2020-12-23 00:54:06,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 00:54:06,459 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2020-12-23 00:54:06,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-23 00:54:06,460 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:54:06,460 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:54:06,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 00:54:06,674 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:54:06,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:54:06,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1202071596, now seen corresponding path program 9 times [2020-12-23 00:54:06,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:54:06,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969223497] [2020-12-23 00:54:06,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:54:06,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:54:08,233 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2020-12-23 00:54:08,456 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2020-12-23 00:54:08,632 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-23 00:54:08,839 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2020-12-23 00:54:09,022 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-23 00:54:09,664 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2020-12-23 00:54:09,886 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2020-12-23 00:54:10,121 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-12-23 00:54:10,370 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-12-23 00:54:11,335 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-12-23 00:54:11,573 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-23 00:54:11,958 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2020-12-23 00:54:12,337 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2020-12-23 00:54:12,610 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2020-12-23 00:54:12,869 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2020-12-23 00:54:13,144 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-23 00:54:13,890 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-12-23 00:54:14,198 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-12-23 00:54:14,492 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2020-12-23 00:54:14,773 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-12-23 00:54:15,055 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2020-12-23 00:54:16,716 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2020-12-23 00:54:17,078 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-12-23 00:54:25,548 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 2 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:54:25,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969223497] [2020-12-23 00:54:25,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925804300] [2020-12-23 00:54:25,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:54:25,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 00:54:25,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:54:25,689 WARN L261 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 152 conjunts are in the unsatisfiable core [2020-12-23 00:54:25,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:54:25,998 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-23 00:54:26,000 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:54:26,025 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:54:26,028 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:54:26,028 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2020-12-23 00:55:36,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:55:36,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:55:36,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:55:36,368 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:55:36,369 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 51 [2020-12-23 00:55:36,372 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:55:36,375 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:55:36,378 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-12-23 00:55:36,379 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:55:36,387 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2020-12-23 00:55:36,433 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:55:36,436 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:55:36,438 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:55:36,439 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:18 [2020-12-23 00:55:37,353 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:55:38,549 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:55:39,419 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 7 proven. 128 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 00:55:39,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:55:39,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 72] total 147 [2020-12-23 00:55:39,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864995123] [2020-12-23 00:55:39,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 147 states [2020-12-23 00:55:39,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:55:39,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2020-12-23 00:55:39,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=598, Invalid=20862, Unknown=2, NotChecked=0, Total=21462 [2020-12-23 00:55:39,426 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand 147 states. [2020-12-23 00:55:46,683 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 14 [2020-12-23 00:55:49,967 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 34 [2020-12-23 00:55:52,271 WARN L197 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 70 [2020-12-23 00:55:54,727 WARN L197 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 66 [2020-12-23 00:55:56,428 WARN L197 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 56 [2020-12-23 00:55:57,406 WARN L197 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-12-23 00:55:59,707 WARN L197 SmtUtils]: Spent 720.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 94 [2020-12-23 00:56:01,794 WARN L197 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 94 [2020-12-23 00:56:02,678 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-12-23 00:56:07,152 WARN L197 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 149 DAG size of output: 102