/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_sum5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:41:35,497 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:41:35,500 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:41:35,543 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:41:35,544 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:41:35,546 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:41:35,547 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:41:35,550 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:41:35,552 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:41:35,554 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:41:35,555 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:41:35,557 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:41:35,557 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:41:35,559 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:41:35,560 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:41:35,562 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:41:35,563 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:41:35,564 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:41:35,584 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:41:35,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:41:35,588 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:41:35,594 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:41:35,595 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:41:35,597 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:41:35,600 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:41:35,611 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:41:35,612 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:41:35,613 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:41:35,617 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 10:41:35,652 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:41:35,653 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:41:35,654 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:41:35,655 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:41:35,655 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:41:35,655 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:41:35,655 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:41:35,656 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:41:35,656 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:41:35,656 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:41:35,656 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:41:35,656 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:41:35,657 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:41:35,657 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:41:35,657 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:41:35,657 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:41:35,658 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:41:35,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:41:35,658 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:41:35,658 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:41:35,659 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:41:35,659 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:41:35,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:41:35,659 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:41:35,659 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:41:35,660 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:41:36,046 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:41:36,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:41:36,098 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:41:36,100 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:41:36,101 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:41:36,102 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum5.c [2021-01-06 10:41:36,190 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3fca69ca9/6ec8aefe00f14705a0fa5a99692d7cce/FLAGfb92eff58 [2021-01-06 10:41:36,885 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:41:36,886 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum5.c [2021-01-06 10:41:36,894 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3fca69ca9/6ec8aefe00f14705a0fa5a99692d7cce/FLAGfb92eff58 [2021-01-06 10:41:37,263 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3fca69ca9/6ec8aefe00f14705a0fa5a99692d7cce [2021-01-06 10:41:37,266 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:41:37,268 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:41:37,275 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:41:37,276 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:41:37,280 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:41:37,281 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:41:37" (1/1) ... [2021-01-06 10:41:37,283 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59f66821 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:41:37, skipping insertion in model container [2021-01-06 10:41:37,283 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:41:37" (1/1) ... [2021-01-06 10:41:37,293 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:41:37,316 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:41:37,554 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_sum5.c[400,413] 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,] 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,] [2021-01-06 10:41:37,590 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:41:37,599 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:41:37,615 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_sum5.c[400,413] 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,] 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,] [2021-01-06 10:41:37,634 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:41:37,652 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:41:37,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:41:37 WrapperNode [2021-01-06 10:41:37,652 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:41:37,654 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:41:37,654 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:41:37,654 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:41:37,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:41:37" (1/1) ... [2021-01-06 10:41:37,672 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:41:37" (1/1) ... [2021-01-06 10:41:37,701 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:41:37,702 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:41:37,702 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:41:37,702 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:41:37,712 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:41:37" (1/1) ... [2021-01-06 10:41:37,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:41:37" (1/1) ... [2021-01-06 10:41:37,716 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:41:37" (1/1) ... [2021-01-06 10:41:37,716 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:41:37" (1/1) ... [2021-01-06 10:41:37,725 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:41:37" (1/1) ... [2021-01-06 10:41:37,742 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:41:37" (1/1) ... [2021-01-06 10:41:37,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:41:37" (1/1) ... [2021-01-06 10:41:37,754 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:41:37,758 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:41:37,758 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:41:37,758 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:41:37,760 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:41:37" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:41:37,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:41:37,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:41:37,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:41:37,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:41:37,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:41:37,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:41:37,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:41:38,374 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:41:38,375 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-01-06 10:41:38,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:41:38 BoogieIcfgContainer [2021-01-06 10:41:38,377 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:41:38,379 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:41:38,379 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:41:38,384 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:41:38,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:41:37" (1/3) ... [2021-01-06 10:41:38,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31d0d4e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:41:38, skipping insertion in model container [2021-01-06 10:41:38,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:41:37" (2/3) ... [2021-01-06 10:41:38,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31d0d4e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:41:38, skipping insertion in model container [2021-01-06 10:41:38,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:41:38" (3/3) ... [2021-01-06 10:41:38,388 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum5.c [2021-01-06 10:41:38,396 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:41:38,405 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:41:38,430 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:41:38,485 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:41:38,487 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:41:38,488 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:41:38,489 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:41:38,489 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:41:38,489 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:41:38,489 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:41:38,489 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:41:38,514 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2021-01-06 10:41:38,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 10:41:38,522 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:41:38,523 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] [2021-01-06 10:41:38,524 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:41:38,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:41:38,533 INFO L82 PathProgramCache]: Analyzing trace with hash 226651140, now seen corresponding path program 1 times [2021-01-06 10:41:38,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:41:38,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488785888] [2021-01-06 10:41:38,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:41:38,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:41:38,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:41:38,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488785888] [2021-01-06 10:41:38,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:41:38,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:41:38,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626312036] [2021-01-06 10:41:38,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:41:38,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:41:38,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:41:38,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:41:38,860 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 2 states. [2021-01-06 10:41:38,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:41:38,901 INFO L93 Difference]: Finished difference Result 83 states and 126 transitions. [2021-01-06 10:41:38,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:41:38,903 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 27 [2021-01-06 10:41:38,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:41:38,923 INFO L225 Difference]: With dead ends: 83 [2021-01-06 10:41:38,923 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 10:41:38,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:41:38,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 10:41:38,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-01-06 10:41:38,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 10:41:38,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2021-01-06 10:41:38,980 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 27 [2021-01-06 10:41:38,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:41:38,981 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2021-01-06 10:41:38,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:41:38,981 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2021-01-06 10:41:38,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 10:41:38,985 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:41:38,985 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] [2021-01-06 10:41:38,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:41:38,987 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:41:38,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:41:38,991 INFO L82 PathProgramCache]: Analyzing trace with hash -833651044, now seen corresponding path program 1 times [2021-01-06 10:41:38,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:41:38,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483379576] [2021-01-06 10:41:38,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:41:39,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:41:39,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:41:39,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483379576] [2021-01-06 10:41:39,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:41:39,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:41:39,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342823649] [2021-01-06 10:41:39,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:41:39,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:41:39,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:41:39,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:41:39,101 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand 3 states. [2021-01-06 10:41:39,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:41:39,243 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2021-01-06 10:41:39,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:41:39,246 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2021-01-06 10:41:39,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:41:39,247 INFO L225 Difference]: With dead ends: 75 [2021-01-06 10:41:39,248 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 10:41:39,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:41:39,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 10:41:39,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-01-06 10:41:39,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-01-06 10:41:39,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-01-06 10:41:39,269 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 27 [2021-01-06 10:41:39,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:41:39,270 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-01-06 10:41:39,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:41:39,270 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-01-06 10:41:39,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 10:41:39,272 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:41:39,273 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] [2021-01-06 10:41:39,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 10:41:39,275 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:41:39,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:41:39,276 INFO L82 PathProgramCache]: Analyzing trace with hash 479992254, now seen corresponding path program 1 times [2021-01-06 10:41:39,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:41:39,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170444818] [2021-01-06 10:41:39,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:41:39,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:41:39,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:41:39,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170444818] [2021-01-06 10:41:39,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:41:39,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:41:39,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103085806] [2021-01-06 10:41:39,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:41:39,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:41:39,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:41:39,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:41:39,399 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 4 states. [2021-01-06 10:41:39,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:41:39,603 INFO L93 Difference]: Finished difference Result 91 states and 119 transitions. [2021-01-06 10:41:39,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:41:39,604 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2021-01-06 10:41:39,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:41:39,605 INFO L225 Difference]: With dead ends: 91 [2021-01-06 10:41:39,606 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 10:41:39,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:41:39,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 10:41:39,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2021-01-06 10:41:39,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 10:41:39,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2021-01-06 10:41:39,617 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 29 [2021-01-06 10:41:39,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:41:39,617 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2021-01-06 10:41:39,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:41:39,617 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2021-01-06 10:41:39,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 10:41:39,621 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:41:39,621 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:41:39,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 10:41:39,622 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:41:39,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:41:39,623 INFO L82 PathProgramCache]: Analyzing trace with hash -509099182, now seen corresponding path program 1 times [2021-01-06 10:41:39,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:41:39,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338575486] [2021-01-06 10:41:39,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:41:39,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:41:39,796 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 10:41:39,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338575486] [2021-01-06 10:41:39,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367989258] [2021-01-06 10:41:39,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:41:39,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:41:39,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:41:39,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:41:40,026 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 10:41:40,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:41:40,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-01-06 10:41:40,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24183041] [2021-01-06 10:41:40,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:41:40,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:41:40,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:41:40,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:41:40,029 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 6 states. [2021-01-06 10:41:40,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:41:40,099 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2021-01-06 10:41:40,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:41:40,100 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2021-01-06 10:41:40,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:41:40,100 INFO L225 Difference]: With dead ends: 97 [2021-01-06 10:41:40,101 INFO L226 Difference]: Without dead ends: 53 [2021-01-06 10:41:40,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:41:40,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-01-06 10:41:40,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2021-01-06 10:41:40,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 10:41:40,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2021-01-06 10:41:40,109 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 49 [2021-01-06 10:41:40,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:41:40,110 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2021-01-06 10:41:40,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:41:40,110 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2021-01-06 10:41:40,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 10:41:40,111 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:41:40,112 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:41:40,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:41:40,326 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:41:40,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:41:40,328 INFO L82 PathProgramCache]: Analyzing trace with hash 290748660, now seen corresponding path program 2 times [2021-01-06 10:41:40,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:41:40,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935106984] [2021-01-06 10:41:40,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:41:40,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:41:40,434 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-01-06 10:41:40,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935106984] [2021-01-06 10:41:40,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742683586] [2021-01-06 10:41:40,435 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 [2021-01-06 10:41:40,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:41:40,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:41:40,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:41:40,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:41:40,613 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-01-06 10:41:40,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:41:40,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-01-06 10:41:40,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191806312] [2021-01-06 10:41:40,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:41:40,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:41:40,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:41:40,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:41:40,618 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 7 states. [2021-01-06 10:41:40,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:41:40,842 INFO L93 Difference]: Finished difference Result 122 states and 150 transitions. [2021-01-06 10:41:40,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:41:40,842 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2021-01-06 10:41:40,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:41:40,843 INFO L225 Difference]: With dead ends: 122 [2021-01-06 10:41:40,844 INFO L226 Difference]: Without dead ends: 82 [2021-01-06 10:41:40,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:41:40,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-01-06 10:41:40,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2021-01-06 10:41:40,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 10:41:40,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2021-01-06 10:41:40,855 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 51 [2021-01-06 10:41:40,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:41:40,856 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2021-01-06 10:41:40,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:41:40,856 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2021-01-06 10:41:40,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 10:41:40,859 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:41:40,859 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1] [2021-01-06 10:41:41,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:41:41,074 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:41:41,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:41:41,075 INFO L82 PathProgramCache]: Analyzing trace with hash -813057144, now seen corresponding path program 3 times [2021-01-06 10:41:41,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:41:41,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343239037] [2021-01-06 10:41:41,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:41:41,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:41:43,215 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:41:43,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343239037] [2021-01-06 10:41:43,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310133097] [2021-01-06 10:41:43,216 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 [2021-01-06 10:41:43,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 10:41:43,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:41:43,313 WARN L261 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 104 conjunts are in the unsatisfiable core [2021-01-06 10:41:43,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:41:45,228 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:41:45,229 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 [2021-01-06 10:41:45,233 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-01-06 10:41:45,246 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:41:45,248 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:41:45,251 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:41:45,252 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:31 [2021-01-06 10:41:45,342 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:41:45,408 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:41:45,410 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:41:45,440 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:41:45,525 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:41:45,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:41:45,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22] total 35 [2021-01-06 10:41:45,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130079196] [2021-01-06 10:41:45,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 10:41:45,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:41:45,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 10:41:45,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 10:41:45,540 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand 35 states. [2021-01-06 10:41:48,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:41:48,635 INFO L93 Difference]: Finished difference Result 207 states and 237 transitions. [2021-01-06 10:41:48,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 10:41:48,635 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 71 [2021-01-06 10:41:48,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:41:48,639 INFO L225 Difference]: With dead ends: 207 [2021-01-06 10:41:48,640 INFO L226 Difference]: Without dead ends: 201 [2021-01-06 10:41:48,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 53 SyntacticMatches, 40 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=214, Invalid=1856, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 10:41:48,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-01-06 10:41:48,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 125. [2021-01-06 10:41:48,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2021-01-06 10:41:48,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 144 transitions. [2021-01-06 10:41:48,677 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 144 transitions. Word has length 71 [2021-01-06 10:41:48,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:41:48,678 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 144 transitions. [2021-01-06 10:41:48,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 10:41:48,678 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 144 transitions. [2021-01-06 10:41:48,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-01-06 10:41:48,680 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:41:48,680 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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, 1, 1, 1, 1] [2021-01-06 10:41:48,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:41:48,894 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:41:48,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:41:48,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1767165226, now seen corresponding path program 4 times [2021-01-06 10:41:48,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:41:48,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742268790] [2021-01-06 10:41:48,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:41:48,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:41:49,050 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 10:41:49,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742268790] [2021-01-06 10:41:49,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338250873] [2021-01-06 10:41:49,052 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 [2021-01-06 10:41:49,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:41:49,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:41:49,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:41:49,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:41:49,291 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 10:41:49,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:41:49,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-01-06 10:41:49,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313549320] [2021-01-06 10:41:49,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:41:49,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:41:49,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:41:49,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:41:49,294 INFO L87 Difference]: Start difference. First operand 125 states and 144 transitions. Second operand 13 states. [2021-01-06 10:41:49,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:41:49,697 INFO L93 Difference]: Finished difference Result 248 states and 286 transitions. [2021-01-06 10:41:49,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:41:49,698 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 73 [2021-01-06 10:41:49,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:41:49,700 INFO L225 Difference]: With dead ends: 248 [2021-01-06 10:41:49,700 INFO L226 Difference]: Without dead ends: 128 [2021-01-06 10:41:49,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:41:49,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-01-06 10:41:49,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2021-01-06 10:41:49,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2021-01-06 10:41:49,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 146 transitions. [2021-01-06 10:41:49,720 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 146 transitions. Word has length 73 [2021-01-06 10:41:49,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:41:49,721 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 146 transitions. [2021-01-06 10:41:49,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:41:49,721 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 146 transitions. [2021-01-06 10:41:49,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-01-06 10:41:49,723 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:41:49,723 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1] [2021-01-06 10:41:49,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:41:49,924 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:41:49,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:41:49,926 INFO L82 PathProgramCache]: Analyzing trace with hash 570637516, now seen corresponding path program 5 times [2021-01-06 10:41:49,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:41:49,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374687192] [2021-01-06 10:41:49,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:41:49,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:41:50,026 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-01-06 10:41:50,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374687192] [2021-01-06 10:41:50,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560161052] [2021-01-06 10:41:50,027 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 [2021-01-06 10:41:50,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 10:41:50,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:41:50,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:41:50,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:41:50,349 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-01-06 10:41:50,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:41:50,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-01-06 10:41:50,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603095151] [2021-01-06 10:41:50,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:41:50,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:41:50,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:41:50,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:41:50,352 INFO L87 Difference]: Start difference. First operand 127 states and 146 transitions. Second operand 13 states. [2021-01-06 10:41:50,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:41:50,744 INFO L93 Difference]: Finished difference Result 209 states and 245 transitions. [2021-01-06 10:41:50,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:41:50,745 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 75 [2021-01-06 10:41:50,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:41:50,746 INFO L225 Difference]: With dead ends: 209 [2021-01-06 10:41:50,746 INFO L226 Difference]: Without dead ends: 104 [2021-01-06 10:41:50,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:41:50,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-01-06 10:41:50,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2021-01-06 10:41:50,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-01-06 10:41:50,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2021-01-06 10:41:50,757 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 75 [2021-01-06 10:41:50,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:41:50,757 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2021-01-06 10:41:50,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:41:50,757 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2021-01-06 10:41:50,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-01-06 10:41:50,759 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:41:50,759 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1] [2021-01-06 10:41:50,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:41:50,973 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:41:50,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:41:50,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1413596990, now seen corresponding path program 6 times [2021-01-06 10:41:50,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:41:50,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224960486] [2021-01-06 10:41:50,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:41:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:41:52,110 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-01-06 10:41:54,347 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-01-06 10:41:56,376 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:41:56,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224960486] [2021-01-06 10:41:56,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491480064] [2021-01-06 10:41:56,378 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 [2021-01-06 10:41:56,481 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 10:41:56,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:41:56,486 WARN L261 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 142 conjunts are in the unsatisfiable core [2021-01-06 10:41:56,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:42:04,249 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:42:04,425 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:42:04,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:42:04,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 46] total 80 [2021-01-06 10:42:04,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779807923] [2021-01-06 10:42:04,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-01-06 10:42:04,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:42:04,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-01-06 10:42:04,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=5830, Unknown=0, NotChecked=0, Total=6320 [2021-01-06 10:42:04,432 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand 80 states. [2021-01-06 10:42:06,073 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 21 [2021-01-06 10:42:06,594 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2021-01-06 10:42:07,229 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 77 [2021-01-06 10:42:08,064 WARN L197 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 44 [2021-01-06 10:42:08,356 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-01-06 10:42:08,896 WARN L197 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 71 [2021-01-06 10:42:09,285 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 68 [2021-01-06 10:42:09,884 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 60 [2021-01-06 10:42:10,437 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2021-01-06 10:42:11,169 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2021-01-06 10:42:11,629 WARN L197 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 77 [2021-01-06 10:42:12,727 WARN L197 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 68 [2021-01-06 10:42:13,276 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2021-01-06 10:42:13,754 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2021-01-06 10:42:15,368 WARN L197 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2021-01-06 10:42:15,979 WARN L197 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2021-01-06 10:42:16,476 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2021-01-06 10:42:16,952 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2021-01-06 10:42:18,980 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-01-06 10:42:19,406 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2021-01-06 10:42:27,776 WARN L197 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 79 [2021-01-06 10:42:28,548 WARN L197 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 73 [2021-01-06 10:42:29,175 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2021-01-06 10:42:29,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:42:29,240 INFO L93 Difference]: Finished difference Result 311 states and 357 transitions. [2021-01-06 10:42:29,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-01-06 10:42:29,241 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 93 [2021-01-06 10:42:29,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:42:29,243 INFO L225 Difference]: With dead ends: 311 [2021-01-06 10:42:29,243 INFO L226 Difference]: Without dead ends: 185 [2021-01-06 10:42:29,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 62 SyntacticMatches, 25 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5736 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=1236, Invalid=13526, Unknown=0, NotChecked=0, Total=14762 [2021-01-06 10:42:29,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-01-06 10:42:29,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 157. [2021-01-06 10:42:29,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2021-01-06 10:42:29,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 174 transitions. [2021-01-06 10:42:29,276 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 174 transitions. Word has length 93 [2021-01-06 10:42:29,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:42:29,276 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 174 transitions. [2021-01-06 10:42:29,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2021-01-06 10:42:29,277 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 174 transitions. [2021-01-06 10:42:29,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-01-06 10:42:29,278 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:42:29,279 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1] [2021-01-06 10:42:29,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:42:29,493 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:42:29,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:42:29,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1562684038, now seen corresponding path program 7 times [2021-01-06 10:42:29,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:42:29,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734650138] [2021-01-06 10:42:29,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:42:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:42:29,655 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-01-06 10:42:29,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734650138] [2021-01-06 10:42:29,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38269448] [2021-01-06 10:42:29,656 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 [2021-01-06 10:42:29,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:42:29,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:42:29,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:42:29,972 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-01-06 10:42:29,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:42:29,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-01-06 10:42:29,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102478537] [2021-01-06 10:42:29,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 10:42:29,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:42:29,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 10:42:29,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:42:29,975 INFO L87 Difference]: Start difference. First operand 157 states and 174 transitions. Second operand 16 states. [2021-01-06 10:42:30,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:42:30,777 INFO L93 Difference]: Finished difference Result 253 states and 286 transitions. [2021-01-06 10:42:30,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:42:30,778 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 101 [2021-01-06 10:42:30,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:42:30,779 INFO L225 Difference]: With dead ends: 253 [2021-01-06 10:42:30,779 INFO L226 Difference]: Without dead ends: 126 [2021-01-06 10:42:30,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:42:30,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-01-06 10:42:30,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 116. [2021-01-06 10:42:30,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2021-01-06 10:42:30,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2021-01-06 10:42:30,796 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 101 [2021-01-06 10:42:30,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:42:30,797 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2021-01-06 10:42:30,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 10:42:30,797 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2021-01-06 10:42:30,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-01-06 10:42:30,798 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:42:30,798 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1] [2021-01-06 10:42:31,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 10:42:31,013 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:42:31,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:42:31,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1433123212, now seen corresponding path program 8 times [2021-01-06 10:42:31,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:42:31,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343849980] [2021-01-06 10:42:31,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:42:31,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:42:32,679 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2021-01-06 10:42:33,106 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-01-06 10:42:33,705 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 30 [2021-01-06 10:42:33,887 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2021-01-06 10:42:34,084 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-01-06 10:42:34,298 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-01-06 10:42:34,694 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 36 [2021-01-06 10:42:34,885 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-01-06 10:42:35,072 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-01-06 10:42:35,292 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-01-06 10:42:36,112 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 36 [2021-01-06 10:42:36,322 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2021-01-06 10:42:43,035 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 4 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:42:43,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343849980] [2021-01-06 10:42:43,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99013497] [2021-01-06 10:42:43,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:42:43,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:42:43,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:42:43,148 WARN L261 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 180 conjunts are in the unsatisfiable core [2021-01-06 10:42:43,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:42:47,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:42:47,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 10:42:47,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 10:42:47,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 10:42:47,708 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:42:47,708 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 23 [2021-01-06 10:42:47,710 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:42:47,727 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:42:47,730 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:42:47,730 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:75, output treesize:7 [2021-01-06 10:42:47,853 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:42:48,085 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:42:48,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:42:48,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 23] total 76 [2021-01-06 10:42:48,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857835540] [2021-01-06 10:42:48,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-01-06 10:42:48,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:42:48,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-01-06 10:42:48,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=5284, Unknown=0, NotChecked=0, Total=5700 [2021-01-06 10:42:48,089 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand 76 states. [2021-01-06 10:42:52,309 WARN L197 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-01-06 10:42:52,561 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 30 [2021-01-06 10:42:52,946 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-01-06 10:42:53,602 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 48 [2021-01-06 10:42:54,226 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2021-01-06 10:42:54,973 WARN L197 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 57 [2021-01-06 10:42:56,547 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 31 [2021-01-06 10:42:57,035 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 35 [2021-01-06 10:42:57,525 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 37 [2021-01-06 10:42:58,194 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-01-06 10:42:58,855 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-01-06 10:43:00,246 WARN L197 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 59 [2021-01-06 10:43:10,124 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-01-06 10:43:10,745 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2021-01-06 10:43:11,179 WARN L197 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 61 [2021-01-06 10:43:11,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:43:11,225 INFO L93 Difference]: Finished difference Result 366 states and 406 transitions. [2021-01-06 10:43:11,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-01-06 10:43:11,226 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 115 [2021-01-06 10:43:11,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:43:11,228 INFO L225 Difference]: With dead ends: 366 [2021-01-06 10:43:11,228 INFO L226 Difference]: Without dead ends: 220 [2021-01-06 10:43:11,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 96 SyntacticMatches, 39 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6133 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=1294, Invalid=13226, Unknown=0, NotChecked=0, Total=14520 [2021-01-06 10:43:11,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-01-06 10:43:11,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 203. [2021-01-06 10:43:11,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2021-01-06 10:43:11,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 222 transitions. [2021-01-06 10:43:11,256 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 222 transitions. Word has length 115 [2021-01-06 10:43:11,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:43:11,256 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 222 transitions. [2021-01-06 10:43:11,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2021-01-06 10:43:11,256 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 222 transitions. [2021-01-06 10:43:11,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-01-06 10:43:11,258 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:43:11,258 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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, 1, 1, 1, 1] [2021-01-06 10:43:11,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-01-06 10:43:11,470 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:43:11,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:43:11,470 INFO L82 PathProgramCache]: Analyzing trace with hash -2097901128, now seen corresponding path program 9 times [2021-01-06 10:43:11,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:43:11,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835399113] [2021-01-06 10:43:11,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:43:11,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:43:11,695 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-01-06 10:43:11,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835399113] [2021-01-06 10:43:11,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746067948] [2021-01-06 10:43:11,695 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 [2021-01-06 10:43:11,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 10:43:11,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:43:11,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:43:11,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:43:12,317 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-01-06 10:43:12,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:43:12,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-06 10:43:12,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171289514] [2021-01-06 10:43:12,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 10:43:12,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:43:12,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 10:43:12,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-01-06 10:43:12,321 INFO L87 Difference]: Start difference. First operand 203 states and 222 transitions. Second operand 23 states. [2021-01-06 10:43:14,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:43:14,091 INFO L93 Difference]: Finished difference Result 317 states and 353 transitions. [2021-01-06 10:43:14,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 10:43:14,093 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 119 [2021-01-06 10:43:14,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:43:14,094 INFO L225 Difference]: With dead ends: 317 [2021-01-06 10:43:14,094 INFO L226 Difference]: Without dead ends: 148 [2021-01-06 10:43:14,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2021-01-06 10:43:14,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-01-06 10:43:14,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 138. [2021-01-06 10:43:14,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2021-01-06 10:43:14,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 148 transitions. [2021-01-06 10:43:14,109 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 148 transitions. Word has length 119 [2021-01-06 10:43:14,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:43:14,110 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 148 transitions. [2021-01-06 10:43:14,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 10:43:14,110 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 148 transitions. [2021-01-06 10:43:14,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-01-06 10:43:14,111 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:43:14,111 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:43:14,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:43:14,325 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:43:14,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:43:14,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1639815466, now seen corresponding path program 10 times [2021-01-06 10:43:14,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:43:14,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733568791] [2021-01-06 10:43:14,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:43:14,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:43:16,447 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2021-01-06 10:43:16,624 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-01-06 10:43:16,955 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-01-06 10:43:17,123 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-01-06 10:43:17,300 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-01-06 10:43:18,046 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2021-01-06 10:43:18,264 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-01-06 10:43:20,193 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-01-06 10:43:20,403 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2021-01-06 10:43:20,616 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-01-06 10:43:20,834 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-01-06 10:43:21,051 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-01-06 10:43:21,280 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-01-06 10:43:31,295 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 18 proven. 257 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:43:31,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733568791] [2021-01-06 10:43:31,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062172994] [2021-01-06 10:43:31,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:43:31,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:43:31,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:43:31,495 WARN L261 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 210 conjunts are in the unsatisfiable core [2021-01-06 10:43:31,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:43:39,726 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:43:40,069 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 250 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 10:43:40,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:43:40,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 24] total 92 [2021-01-06 10:43:40,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429586133] [2021-01-06 10:43:40,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2021-01-06 10:43:40,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:43:40,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-01-06 10:43:40,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=7911, Unknown=0, NotChecked=0, Total=8372 [2021-01-06 10:43:40,073 INFO L87 Difference]: Start difference. First operand 138 states and 148 transitions. Second operand 92 states. [2021-01-06 10:43:43,111 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 34 [2021-01-06 10:43:43,485 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 32 [2021-01-06 10:43:44,245 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 31 [2021-01-06 10:43:44,669 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 35 [2021-01-06 10:43:45,577 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 37 [2021-01-06 10:43:46,409 WARN L197 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 78 [2021-01-06 10:43:47,219 WARN L197 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 69 [2021-01-06 10:43:48,121 WARN L197 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 69 [2021-01-06 10:43:49,206 WARN L197 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 63 [2021-01-06 10:43:50,148 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 32 [2021-01-06 10:43:50,455 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-01-06 10:43:51,369 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 36 [2021-01-06 10:43:51,740 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 37 [2021-01-06 10:43:52,170 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 38 [2021-01-06 10:43:52,528 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 38 [2021-01-06 10:43:53,352 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 39 [2021-01-06 10:43:54,143 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 41 [2021-01-06 10:43:54,676 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 42 [2021-01-06 10:43:55,199 WARN L197 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2021-01-06 10:43:55,992 WARN L197 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2021-01-06 10:43:56,544 WARN L197 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-01-06 10:43:57,246 WARN L197 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 65 [2021-01-06 10:43:58,075 WARN L197 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 84 [2021-01-06 10:43:58,995 WARN L197 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2021-01-06 10:44:00,092 WARN L197 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 65 [2021-01-06 10:44:01,318 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 36 [2021-01-06 10:44:01,821 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 39 [2021-01-06 10:44:02,364 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 39 [2021-01-06 10:44:02,902 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 40 [2021-01-06 10:44:03,467 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 40 [2021-01-06 10:44:04,056 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 42 [2021-01-06 10:44:05,369 WARN L197 SmtUtils]: Spent 787.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 93 [2021-01-06 10:44:06,652 WARN L197 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 88 [2021-01-06 10:44:07,732 WARN L197 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 76 [2021-01-06 10:44:28,277 WARN L197 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 67 [2021-01-06 10:44:29,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:44:29,111 INFO L93 Difference]: Finished difference Result 282 states and 309 transitions. [2021-01-06 10:44:29,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-01-06 10:44:29,115 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 137 [2021-01-06 10:44:29,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:44:29,117 INFO L225 Difference]: With dead ends: 282 [2021-01-06 10:44:29,118 INFO L226 Difference]: Without dead ends: 278 [2021-01-06 10:44:29,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 118 SyntacticMatches, 44 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7244 ImplicationChecksByTransitivity, 43.9s TimeCoverageRelationStatistics Valid=1426, Invalid=18034, Unknown=0, NotChecked=0, Total=19460 [2021-01-06 10:44:29,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-01-06 10:44:29,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 143. [2021-01-06 10:44:29,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2021-01-06 10:44:29,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 154 transitions. [2021-01-06 10:44:29,148 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 154 transitions. Word has length 137 [2021-01-06 10:44:29,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:44:29,148 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 154 transitions. [2021-01-06 10:44:29,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2021-01-06 10:44:29,149 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 154 transitions. [2021-01-06 10:44:29,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-01-06 10:44:29,150 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:44:29,150 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:44:29,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:44:29,359 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:44:29,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:44:29,359 INFO L82 PathProgramCache]: Analyzing trace with hash -337097908, now seen corresponding path program 11 times [2021-01-06 10:44:29,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:44:29,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598033454] [2021-01-06 10:44:29,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:44:29,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:44:29,858 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-01-06 10:44:29,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598033454] [2021-01-06 10:44:29,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125644222] [2021-01-06 10:44:29,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:44:30,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 10:44:30,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:44:30,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 10:44:30,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:44:31,671 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-01-06 10:44:31,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:44:31,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-01-06 10:44:31,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219753173] [2021-01-06 10:44:31,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 10:44:31,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:44:31,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 10:44:31,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-01-06 10:44:31,674 INFO L87 Difference]: Start difference. First operand 143 states and 154 transitions. Second operand 27 states. [2021-01-06 10:44:37,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:44:37,227 INFO L93 Difference]: Finished difference Result 530 states and 577 transitions. [2021-01-06 10:44:37,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 10:44:37,230 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 139 [2021-01-06 10:44:37,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:44:37,232 INFO L225 Difference]: With dead ends: 530 [2021-01-06 10:44:37,232 INFO L226 Difference]: Without dead ends: 175 [2021-01-06 10:44:37,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=308, Invalid=1252, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:44:37,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-01-06 10:44:37,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 158. [2021-01-06 10:44:37,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2021-01-06 10:44:37,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 168 transitions. [2021-01-06 10:44:37,277 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 168 transitions. Word has length 139 [2021-01-06 10:44:37,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:44:37,278 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 168 transitions. [2021-01-06 10:44:37,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 10:44:37,278 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 168 transitions. [2021-01-06 10:44:37,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-01-06 10:44:37,279 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:44:37,279 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:44:37,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 10:44:37,484 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:44:37,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:44:37,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1612014142, now seen corresponding path program 12 times [2021-01-06 10:44:37,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:44:37,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140593509] [2021-01-06 10:44:37,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:44:37,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:44:38,014 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 10:44:38,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140593509] [2021-01-06 10:44:38,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443272883] [2021-01-06 10:44:38,015 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:44:38,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 10:44:38,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:44:38,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 10:44:38,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:44:39,817 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 10:44:39,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:44:39,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-01-06 10:44:39,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840816862] [2021-01-06 10:44:39,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 10:44:39,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:44:39,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 10:44:39,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2021-01-06 10:44:39,819 INFO L87 Difference]: Start difference. First operand 158 states and 168 transitions. Second operand 27 states. [2021-01-06 10:44:43,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:44:43,726 INFO L93 Difference]: Finished difference Result 174 states and 184 transitions. [2021-01-06 10:44:43,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 10:44:43,728 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 157 [2021-01-06 10:44:43,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:44:43,732 INFO L225 Difference]: With dead ends: 174 [2021-01-06 10:44:43,733 INFO L226 Difference]: Without dead ends: 170 [2021-01-06 10:44:43,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=299, Invalid=961, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 10:44:43,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-01-06 10:44:43,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 160. [2021-01-06 10:44:43,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2021-01-06 10:44:43,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 170 transitions. [2021-01-06 10:44:43,764 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 170 transitions. Word has length 157 [2021-01-06 10:44:43,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:44:43,764 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 170 transitions. [2021-01-06 10:44:43,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 10:44:43,765 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 170 transitions. [2021-01-06 10:44:43,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-01-06 10:44:43,766 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:44:43,766 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:44:43,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 10:44:43,981 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:44:43,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:44:43,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1284366496, now seen corresponding path program 13 times [2021-01-06 10:44:43,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:44:43,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086898008] [2021-01-06 10:44:43,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:44:44,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:44:47,223 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 18 [2021-01-06 10:44:47,470 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2021-01-06 10:44:48,154 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-01-06 10:44:48,433 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-01-06 10:44:48,731 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-01-06 10:44:49,026 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-01-06 10:44:49,342 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2021-01-06 10:44:49,754 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2021-01-06 10:44:50,106 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-01-06 10:44:50,455 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2021-01-06 10:44:50,784 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-01-06 10:44:51,080 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-01-06 10:44:51,366 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-01-06 10:44:51,606 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-01-06 10:44:51,911 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2021-01-06 10:44:52,227 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-01-06 10:44:52,550 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-01-06 10:44:52,878 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2021-01-06 10:44:53,301 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-01-06 10:44:53,713 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-01-06 10:44:54,145 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 38 [2021-01-06 10:44:54,605 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 38 [2021-01-06 10:44:54,981 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-01-06 10:44:55,353 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-01-06 10:44:55,671 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-01-06 10:44:55,985 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-01-06 10:44:56,301 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-01-06 10:44:57,914 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-01-06 10:44:58,914 WARN L197 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-01-06 10:44:59,511 WARN L197 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 39 [2021-01-06 10:44:59,961 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2021-01-06 10:45:00,432 WARN L197 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-01-06 10:45:00,853 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-01-06 10:45:01,279 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-01-06 10:45:01,698 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-01-06 10:45:02,151 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-01-06 10:45:02,612 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-01-06 10:45:03,049 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-01-06 10:45:03,493 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-01-06 10:45:04,382 WARN L197 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2021-01-06 10:45:05,008 WARN L197 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2021-01-06 10:45:05,504 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-01-06 10:45:05,961 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-01-06 10:45:06,449 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-01-06 10:45:06,896 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-01-06 10:45:07,364 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2021-01-06 10:45:07,903 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-01-06 10:45:08,319 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-01-06 10:45:08,836 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-01-06 10:45:09,823 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-01-06 10:45:10,511 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 29 [2021-01-06 10:45:10,884 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 27 [2021-01-06 10:45:14,620 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 28 [2021-01-06 10:45:15,178 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2021-01-06 10:45:17,824 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-01-06 10:45:27,088 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 30 proven. 366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:45:27,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086898008] [2021-01-06 10:45:27,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078448821] [2021-01-06 10:45:27,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:45:27,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:45:27,259 WARN L261 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 262 conjunts are in the unsatisfiable core [2021-01-06 10:45:27,267 INFO L286 TraceCheckSpWp]: Computing forward predicates...