/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/verifythis/duplets.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:10:59,461 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:10:59,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:10:59,525 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:10:59,526 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:10:59,530 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:10:59,534 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:10:59,549 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:10:59,553 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:10:59,559 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:10:59,563 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:10:59,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:10:59,565 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:10:59,568 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:10:59,570 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:10:59,572 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:10:59,573 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:10:59,577 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:10:59,584 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:10:59,592 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:10:59,593 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:10:59,595 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:10:59,597 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:10:59,600 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:10:59,608 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:10:59,613 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 17:10:59,614 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 17:10:59,617 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 17:10:59,618 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 17:10:59,619 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 17:10:59,619 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 17:10:59,620 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 17:10:59,626 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 17:10:59,627 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:10:59,628 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:10:59,629 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:10:59,630 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 17:10:59,678 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:10:59,678 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:10:59,682 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:10:59,683 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:10:59,683 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:10:59,683 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:10:59,683 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:10:59,684 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:10:59,684 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:10:59,684 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:10:59,685 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:10:59,686 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:10:59,686 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:10:59,686 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:10:59,687 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:10:59,687 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:10:59,687 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:10:59,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:10:59,687 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:10:59,688 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:10:59,688 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:10:59,688 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:10:59,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:10:59,688 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:10:59,688 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:10:59,689 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:11:00,169 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:11:00,208 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:11:00,212 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:11:00,213 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:11:00,214 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:11:00,215 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/duplets.c [2021-01-06 17:11:00,312 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0436d243b/8c79a06eadc843c6ac852c4e01b18e92/FLAGe4ade2fa2 [2021-01-06 17:11:00,934 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:11:00,935 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/verifythis/duplets.c [2021-01-06 17:11:00,944 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0436d243b/8c79a06eadc843c6ac852c4e01b18e92/FLAGe4ade2fa2 [2021-01-06 17:11:01,277 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0436d243b/8c79a06eadc843c6ac852c4e01b18e92 [2021-01-06 17:11:01,280 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:11:01,283 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:11:01,285 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:11:01,285 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:11:01,289 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:11:01,290 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:11:01" (1/1) ... [2021-01-06 17:11:01,291 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c474138 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:11:01, skipping insertion in model container [2021-01-06 17:11:01,291 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:11:01" (1/1) ... [2021-01-06 17:11:01,305 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:11:01,327 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:11:01,503 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/verifythis/duplets.c[485,498] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~j~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: VariableLHS[~j~1,] left hand side expression in assignment: address: IdentifierExpression[~_i,] left hand side expression in assignment: address: IdentifierExpression[~_j,] [2021-01-06 17:11:01,539 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:11:01,558 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:11:01,575 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/verifythis/duplets.c[485,498] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~j~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: VariableLHS[~j~1,] left hand side expression in assignment: address: IdentifierExpression[~_i,] left hand side expression in assignment: address: IdentifierExpression[~_j,] [2021-01-06 17:11:01,621 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:11:01,650 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:11:01,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:11:01 WrapperNode [2021-01-06 17:11:01,652 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:11:01,654 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:11:01,654 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:11:01,655 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:11:01,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:11:01" (1/1) ... [2021-01-06 17:11:01,691 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:11:01" (1/1) ... [2021-01-06 17:11:01,722 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:11:01,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:11:01,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:11:01,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:11:01,737 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:11:01" (1/1) ... [2021-01-06 17:11:01,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:11:01" (1/1) ... [2021-01-06 17:11:01,740 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:11:01" (1/1) ... [2021-01-06 17:11:01,741 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:11:01" (1/1) ... [2021-01-06 17:11:01,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:11:01" (1/1) ... [2021-01-06 17:11:01,755 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:11:01" (1/1) ... [2021-01-06 17:11:01,757 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:11:01" (1/1) ... [2021-01-06 17:11:01,761 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:11:01,762 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:11:01,762 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:11:01,762 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:11:01,763 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:11:01" (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 17:11:01,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:11:01,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:11:01,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 17:11:01,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-01-06 17:11:01,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:11:01,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:11:01,873 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 17:11:01,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 17:11:02,441 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:11:02,442 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2021-01-06 17:11:02,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:11:02 BoogieIcfgContainer [2021-01-06 17:11:02,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:11:02,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:11:02,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:11:02,450 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:11:02,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:11:01" (1/3) ... [2021-01-06 17:11:02,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2facc403 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:11:02, skipping insertion in model container [2021-01-06 17:11:02,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:11:01" (2/3) ... [2021-01-06 17:11:02,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2facc403 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:11:02, skipping insertion in model container [2021-01-06 17:11:02,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:11:02" (3/3) ... [2021-01-06 17:11:02,454 INFO L111 eAbstractionObserver]: Analyzing ICFG duplets.c [2021-01-06 17:11:02,460 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:11:02,469 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2021-01-06 17:11:02,492 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-01-06 17:11:02,524 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:11:02,525 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:11:02,525 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:11:02,525 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:11:02,525 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:11:02,525 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:11:02,525 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:11:02,526 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:11:02,544 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2021-01-06 17:11:02,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 17:11:02,551 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:02,552 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:11:02,552 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:02,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:02,560 INFO L82 PathProgramCache]: Analyzing trace with hash 655320983, now seen corresponding path program 1 times [2021-01-06 17:11:02,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:02,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690981454] [2021-01-06 17:11:02,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:02,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:02,752 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 17:11:02,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690981454] [2021-01-06 17:11:02,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:11:02,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:11:02,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921642530] [2021-01-06 17:11:02,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:11:02,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:11:02,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:11:02,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:11:02,780 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 2 states. [2021-01-06 17:11:02,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:11:02,803 INFO L93 Difference]: Finished difference Result 89 states and 118 transitions. [2021-01-06 17:11:02,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:11:02,804 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2021-01-06 17:11:02,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:11:02,814 INFO L225 Difference]: With dead ends: 89 [2021-01-06 17:11:02,814 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 17:11:02,818 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 17:11:02,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 17:11:02,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-01-06 17:11:02,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 17:11:02,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-01-06 17:11:02,862 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 17 [2021-01-06 17:11:02,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:11:02,862 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-01-06 17:11:02,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:11:02,863 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-01-06 17:11:02,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 17:11:02,863 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:02,864 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:11:02,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:11:02,864 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:02,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:02,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1826916331, now seen corresponding path program 1 times [2021-01-06 17:11:02,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:02,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344295723] [2021-01-06 17:11:02,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:02,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:03,101 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 17:11:03,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344295723] [2021-01-06 17:11:03,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:11:03,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 17:11:03,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192442552] [2021-01-06 17:11:03,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:11:03,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:11:03,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:11:03,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:11:03,106 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 5 states. [2021-01-06 17:11:03,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:11:03,184 INFO L93 Difference]: Finished difference Result 96 states and 105 transitions. [2021-01-06 17:11:03,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 17:11:03,185 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2021-01-06 17:11:03,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:11:03,187 INFO L225 Difference]: With dead ends: 96 [2021-01-06 17:11:03,187 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 17:11:03,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:11:03,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 17:11:03,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 43. [2021-01-06 17:11:03,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 17:11:03,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-01-06 17:11:03,198 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 17 [2021-01-06 17:11:03,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:11:03,199 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-01-06 17:11:03,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:11:03,199 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-01-06 17:11:03,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:11:03,200 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:03,200 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:11:03,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 17:11:03,200 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:03,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:03,201 INFO L82 PathProgramCache]: Analyzing trace with hash -756845843, now seen corresponding path program 1 times [2021-01-06 17:11:03,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:03,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668414276] [2021-01-06 17:11:03,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:03,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:03,281 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 17:11:03,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668414276] [2021-01-06 17:11:03,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:11:03,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 17:11:03,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479817066] [2021-01-06 17:11:03,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 17:11:03,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:11:03,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 17:11:03,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:11:03,291 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 4 states. [2021-01-06 17:11:03,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:11:03,374 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2021-01-06 17:11:03,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 17:11:03,378 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2021-01-06 17:11:03,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:11:03,379 INFO L225 Difference]: With dead ends: 67 [2021-01-06 17:11:03,379 INFO L226 Difference]: Without dead ends: 65 [2021-01-06 17:11:03,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:11:03,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-01-06 17:11:03,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 45. [2021-01-06 17:11:03,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 17:11:03,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-01-06 17:11:03,389 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 18 [2021-01-06 17:11:03,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:11:03,390 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-01-06 17:11:03,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 17:11:03,390 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-01-06 17:11:03,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:11:03,391 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:03,391 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] [2021-01-06 17:11:03,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 17:11:03,392 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:03,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:03,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1244525418, now seen corresponding path program 1 times [2021-01-06 17:11:03,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:03,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976401462] [2021-01-06 17:11:03,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:03,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:03,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:11:03,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976401462] [2021-01-06 17:11:03,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:11:03,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-01-06 17:11:03,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798103228] [2021-01-06 17:11:03,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 17:11:03,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:11:03,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 17:11:03,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:11:03,997 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 11 states. [2021-01-06 17:11:04,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:11:04,335 INFO L93 Difference]: Finished difference Result 104 states and 116 transitions. [2021-01-06 17:11:04,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:11:04,336 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2021-01-06 17:11:04,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:11:04,337 INFO L225 Difference]: With dead ends: 104 [2021-01-06 17:11:04,337 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 17:11:04,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:11:04,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 17:11:04,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2021-01-06 17:11:04,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 17:11:04,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-01-06 17:11:04,349 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 20 [2021-01-06 17:11:04,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:11:04,350 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-01-06 17:11:04,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 17:11:04,350 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-01-06 17:11:04,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:11:04,351 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:04,351 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] [2021-01-06 17:11:04,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 17:11:04,351 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:04,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:04,352 INFO L82 PathProgramCache]: Analyzing trace with hash 69607633, now seen corresponding path program 1 times [2021-01-06 17:11:04,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:04,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019065899] [2021-01-06 17:11:04,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:04,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:04,460 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 17:11:04,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019065899] [2021-01-06 17:11:04,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:11:04,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-06 17:11:04,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008818291] [2021-01-06 17:11:04,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:11:04,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:11:04,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:11:04,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:11:04,463 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 7 states. [2021-01-06 17:11:04,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:11:04,613 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2021-01-06 17:11:04,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:11:04,614 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2021-01-06 17:11:04,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:11:04,615 INFO L225 Difference]: With dead ends: 110 [2021-01-06 17:11:04,615 INFO L226 Difference]: Without dead ends: 92 [2021-01-06 17:11:04,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:11:04,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-01-06 17:11:04,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 53. [2021-01-06 17:11:04,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 17:11:04,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2021-01-06 17:11:04,626 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 22 [2021-01-06 17:11:04,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:11:04,626 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2021-01-06 17:11:04,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:11:04,627 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2021-01-06 17:11:04,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:11:04,628 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:04,628 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] [2021-01-06 17:11:04,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-06 17:11:04,628 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:04,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:04,629 INFO L82 PathProgramCache]: Analyzing trace with hash 69548051, now seen corresponding path program 1 times [2021-01-06 17:11:04,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:04,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570869020] [2021-01-06 17:11:04,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:04,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:04,793 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 17:11:04,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570869020] [2021-01-06 17:11:04,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:11:04,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-01-06 17:11:04,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772738145] [2021-01-06 17:11:04,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 17:11:04,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:11:04,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 17:11:04,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:11:04,796 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 11 states. [2021-01-06 17:11:05,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:11:05,142 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2021-01-06 17:11:05,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:11:05,142 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2021-01-06 17:11:05,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:11:05,144 INFO L225 Difference]: With dead ends: 74 [2021-01-06 17:11:05,144 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 17:11:05,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:11:05,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 17:11:05,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2021-01-06 17:11:05,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-06 17:11:05,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2021-01-06 17:11:05,153 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 22 [2021-01-06 17:11:05,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:11:05,154 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2021-01-06 17:11:05,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 17:11:05,154 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2021-01-06 17:11:05,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 17:11:05,155 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:05,155 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] [2021-01-06 17:11:05,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-06 17:11:05,156 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:05,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:05,156 INFO L82 PathProgramCache]: Analyzing trace with hash 521545022, now seen corresponding path program 1 times [2021-01-06 17:11:05,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:05,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590229319] [2021-01-06 17:11:05,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:05,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:05,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:11:05,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590229319] [2021-01-06 17:11:05,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996800853] [2021-01-06 17:11:05,239 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 17:11:05,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:05,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 17:11:05,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:11:05,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:11:05,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:11:05,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-01-06 17:11:05,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621485538] [2021-01-06 17:11:05,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:11:05,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:11:05,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:11:05,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:11:05,492 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand 5 states. [2021-01-06 17:11:05,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:11:05,564 INFO L93 Difference]: Finished difference Result 103 states and 111 transitions. [2021-01-06 17:11:05,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 17:11:05,568 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2021-01-06 17:11:05,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:11:05,569 INFO L225 Difference]: With dead ends: 103 [2021-01-06 17:11:05,569 INFO L226 Difference]: Without dead ends: 78 [2021-01-06 17:11:05,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:11:05,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-01-06 17:11:05,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 60. [2021-01-06 17:11:05,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 17:11:05,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2021-01-06 17:11:05,592 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 23 [2021-01-06 17:11:05,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:11:05,592 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2021-01-06 17:11:05,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:11:05,593 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2021-01-06 17:11:05,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 17:11:05,595 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:05,595 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] [2021-01-06 17:11:05,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 17:11:05,812 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:05,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:05,814 INFO L82 PathProgramCache]: Analyzing trace with hash -2028181769, now seen corresponding path program 1 times [2021-01-06 17:11:05,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:05,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669484321] [2021-01-06 17:11:05,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:05,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:05,971 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 17:11:05,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669484321] [2021-01-06 17:11:05,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:11:05,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 17:11:05,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678733160] [2021-01-06 17:11:05,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:11:05,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:11:05,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:11:05,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:11:05,976 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 6 states. [2021-01-06 17:11:06,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:11:06,086 INFO L93 Difference]: Finished difference Result 87 states and 93 transitions. [2021-01-06 17:11:06,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:11:06,087 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2021-01-06 17:11:06,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:11:06,090 INFO L225 Difference]: With dead ends: 87 [2021-01-06 17:11:06,092 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 17:11:06,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:11:06,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 17:11:06,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 62. [2021-01-06 17:11:06,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-01-06 17:11:06,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2021-01-06 17:11:06,123 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 26 [2021-01-06 17:11:06,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:11:06,126 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2021-01-06 17:11:06,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:11:06,126 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2021-01-06 17:11:06,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 17:11:06,127 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:06,127 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] [2021-01-06 17:11:06,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-01-06 17:11:06,128 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:06,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:06,129 INFO L82 PathProgramCache]: Analyzing trace with hash -2028241351, now seen corresponding path program 1 times [2021-01-06 17:11:06,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:06,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169743230] [2021-01-06 17:11:06,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:06,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:06,289 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 17:11:06,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169743230] [2021-01-06 17:11:06,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:11:06,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-06 17:11:06,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122196639] [2021-01-06 17:11:06,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:11:06,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:11:06,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:11:06,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:11:06,293 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 7 states. [2021-01-06 17:11:06,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:11:06,494 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2021-01-06 17:11:06,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:11:06,494 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2021-01-06 17:11:06,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:11:06,495 INFO L225 Difference]: With dead ends: 85 [2021-01-06 17:11:06,496 INFO L226 Difference]: Without dead ends: 83 [2021-01-06 17:11:06,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:11:06,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-01-06 17:11:06,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2021-01-06 17:11:06,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 17:11:06,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2021-01-06 17:11:06,505 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 26 [2021-01-06 17:11:06,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:11:06,505 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2021-01-06 17:11:06,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:11:06,506 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2021-01-06 17:11:06,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 17:11:06,507 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:06,507 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:11:06,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-01-06 17:11:06,507 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:06,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:06,508 INFO L82 PathProgramCache]: Analyzing trace with hash -760559199, now seen corresponding path program 2 times [2021-01-06 17:11:06,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:06,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101589834] [2021-01-06 17:11:06,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:06,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:07,356 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 17:11:07,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101589834] [2021-01-06 17:11:07,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713200578] [2021-01-06 17:11:07,357 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 17:11:07,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:11:07,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:11:07,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 51 conjunts are in the unsatisfiable core [2021-01-06 17:11:07,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:11:07,584 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:11:07,587 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:11:07,926 INFO L348 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-01-06 17:11:07,927 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2021-01-06 17:11:07,929 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 17:11:07,946 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:11:07,958 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 17:11:07,959 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:39, output treesize:36 [2021-01-06 17:11:12,650 INFO L348 Elim1Store]: treesize reduction 17, result has 83.0 percent of original size [2021-01-06 17:11:12,651 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 92 [2021-01-06 17:11:12,655 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2021-01-06 17:11:12,656 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:11:12,657 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2021-01-06 17:11:12,658 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:11:12,659 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2021-01-06 17:11:12,659 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:11:12,665 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-01-06 17:11:12,743 INFO L625 ElimStorePlain]: treesize reduction 12, result has 84.8 percent of original size [2021-01-06 17:11:12,749 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:11:12,751 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:11:12,756 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:11:12,758 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:11:12,759 INFO L639 QuantifierPusher]: Distributing 5 conjuncts over 4 disjuncts [2021-01-06 17:11:12,764 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:11:12,770 INFO L639 QuantifierPusher]: Distributing 5 conjuncts over 3 disjuncts [2021-01-06 17:11:12,775 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:11:12,778 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 4 disjuncts [2021-01-06 17:11:12,784 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 17:11:12,785 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:347 [2021-01-06 17:11:17,660 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:11:17,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:11:17,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-01-06 17:11:17,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991459103] [2021-01-06 17:11:17,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 17:11:17,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:11:17,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 17:11:17,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=677, Unknown=5, NotChecked=0, Total=756 [2021-01-06 17:11:17,663 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand 28 states. [2021-01-06 17:11:18,193 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 24 [2021-01-06 17:11:20,374 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2021-01-06 17:11:24,547 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 28 [2021-01-06 17:11:28,743 WARN L197 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 84 DAG size of output: 42 [2021-01-06 17:11:37,007 WARN L197 SmtUtils]: Spent 8.21 s on a formula simplification. DAG size of input: 112 DAG size of output: 56 [2021-01-06 17:11:43,287 WARN L197 SmtUtils]: Spent 6.24 s on a formula simplification. DAG size of input: 126 DAG size of output: 59 [2021-01-06 17:11:47,628 WARN L197 SmtUtils]: Spent 4.29 s on a formula simplification. DAG size of input: 139 DAG size of output: 66 [2021-01-06 17:11:51,878 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 36 [2021-01-06 17:11:58,188 WARN L197 SmtUtils]: Spent 6.26 s on a formula simplification. DAG size of input: 130 DAG size of output: 62 [2021-01-06 17:12:08,504 WARN L197 SmtUtils]: Spent 8.24 s on a formula simplification. DAG size of input: 121 DAG size of output: 61 [2021-01-06 17:12:17,477 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 37 [2021-01-06 17:12:28,517 WARN L197 SmtUtils]: Spent 6.24 s on a formula simplification. DAG size of input: 116 DAG size of output: 59 [2021-01-06 17:12:38,843 WARN L197 SmtUtils]: Spent 6.26 s on a formula simplification. DAG size of input: 119 DAG size of output: 62 [2021-01-06 17:12:47,103 WARN L197 SmtUtils]: Spent 4.18 s on a formula simplification. DAG size of input: 90 DAG size of output: 48 [2021-01-06 17:12:50,059 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 38 [2021-01-06 17:13:00,184 WARN L197 SmtUtils]: Spent 4.21 s on a formula simplification. DAG size of input: 94 DAG size of output: 50 [2021-01-06 17:13:14,449 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 38 [2021-01-06 17:13:36,890 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 34 [2021-01-06 17:14:55,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:14:55,561 INFO L93 Difference]: Finished difference Result 233 states and 253 transitions. [2021-01-06 17:14:55,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 17:14:55,562 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 26 [2021-01-06 17:14:55,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:14:55,563 INFO L225 Difference]: With dead ends: 233 [2021-01-06 17:14:55,564 INFO L226 Difference]: Without dead ends: 190 [2021-01-06 17:14:55,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 80.2s TimeCoverageRelationStatistics Valid=610, Invalid=1731, Unknown=11, NotChecked=0, Total=2352 [2021-01-06 17:14:55,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-01-06 17:14:55,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 74. [2021-01-06 17:14:55,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-01-06 17:14:55,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2021-01-06 17:14:55,588 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 26 [2021-01-06 17:14:55,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:14:55,589 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2021-01-06 17:14:55,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 17:14:55,589 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2021-01-06 17:14:55,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 17:14:55,590 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:14:55,590 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] [2021-01-06 17:14:55,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 17:14:55,804 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:14:55,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:14:55,805 INFO L82 PathProgramCache]: Analyzing trace with hash 775341595, now seen corresponding path program 1 times [2021-01-06 17:14:55,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:14:55,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820417864] [2021-01-06 17:14:55,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:14:55,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:14:55,983 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 17:14:55,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820417864] [2021-01-06 17:14:55,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:14:55,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-01-06 17:14:55,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88309002] [2021-01-06 17:14:55,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:14:55,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:14:55,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:14:55,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:14:55,988 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand 9 states. [2021-01-06 17:14:56,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:14:56,179 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2021-01-06 17:14:56,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:14:56,180 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2021-01-06 17:14:56,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:14:56,183 INFO L225 Difference]: With dead ends: 84 [2021-01-06 17:14:56,183 INFO L226 Difference]: Without dead ends: 82 [2021-01-06 17:14:56,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:14:56,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-01-06 17:14:56,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2021-01-06 17:14:56,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-01-06 17:14:56,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2021-01-06 17:14:56,194 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 28 [2021-01-06 17:14:56,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:14:56,194 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2021-01-06 17:14:56,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:14:56,195 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2021-01-06 17:14:56,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 17:14:56,197 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:14:56,197 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] [2021-01-06 17:14:56,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-01-06 17:14:56,198 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:14:56,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:14:56,198 INFO L82 PathProgramCache]: Analyzing trace with hash 2074058397, now seen corresponding path program 1 times [2021-01-06 17:14:56,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:14:56,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396195569] [2021-01-06 17:14:56,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:14:56,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:14:56,661 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 17:14:56,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396195569] [2021-01-06 17:14:56,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:14:56,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-01-06 17:14:56,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809643670] [2021-01-06 17:14:56,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 17:14:56,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:14:56,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 17:14:56,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-01-06 17:14:56,664 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand 14 states. [2021-01-06 17:14:57,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:14:57,261 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2021-01-06 17:14:57,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:14:57,262 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 30 [2021-01-06 17:14:57,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:14:57,263 INFO L225 Difference]: With dead ends: 87 [2021-01-06 17:14:57,263 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 17:14:57,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:14:57,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 17:14:57,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2021-01-06 17:14:57,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 17:14:57,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2021-01-06 17:14:57,275 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 30 [2021-01-06 17:14:57,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:14:57,275 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2021-01-06 17:14:57,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 17:14:57,275 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2021-01-06 17:14:57,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 17:14:57,276 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:14:57,276 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2021-01-06 17:14:57,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-01-06 17:14:57,276 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:14:57,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:14:57,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1348902116, now seen corresponding path program 1 times [2021-01-06 17:14:57,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:14:57,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119903482] [2021-01-06 17:14:57,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:14:57,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:14:57,368 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 17:14:57,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119903482] [2021-01-06 17:14:57,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227936353] [2021-01-06 17:14:57,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:14:57,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:14:57,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 17:14:57,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:14:57,489 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-01-06 17:14:57,491 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 17:14:57,498 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:14:57,499 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 17:14:57,500 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2021-01-06 17:14:57,553 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-01-06 17:14:57,554 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 17:14:57,562 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:14:57,564 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 17:14:57,565 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:7 [2021-01-06 17:14:57,572 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:14:57,575 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:14:57,583 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 17:14:57,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:14:57,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 9 [2021-01-06 17:14:57,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131781172] [2021-01-06 17:14:57,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:14:57,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:14:57,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:14:57,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:14:57,586 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand 6 states. [2021-01-06 17:14:57,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:14:57,696 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2021-01-06 17:14:57,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:14:57,697 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2021-01-06 17:14:57,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:14:57,698 INFO L225 Difference]: With dead ends: 100 [2021-01-06 17:14:57,698 INFO L226 Difference]: Without dead ends: 80 [2021-01-06 17:14:57,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:14:57,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-01-06 17:14:57,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2021-01-06 17:14:57,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 17:14:57,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2021-01-06 17:14:57,710 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 31 [2021-01-06 17:14:57,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:14:57,710 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2021-01-06 17:14:57,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:14:57,710 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2021-01-06 17:14:57,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 17:14:57,711 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:14:57,711 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2021-01-06 17:14:57,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 17:14:57,925 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:14:57,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:14:57,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1348961698, now seen corresponding path program 1 times [2021-01-06 17:14:57,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:14:57,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179998756] [2021-01-06 17:14:57,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:14:57,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:14:58,051 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 17:14:58,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179998756] [2021-01-06 17:14:58,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408109547] [2021-01-06 17:14:58,056 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 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 17:14:58,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:14:58,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 17:14:58,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:14:58,170 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-01-06 17:14:58,172 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 17:14:58,179 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:14:58,180 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 17:14:58,180 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2021-01-06 17:14:58,318 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-01-06 17:14:58,319 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 17:14:58,328 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:14:58,330 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 17:14:58,330 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:40, output treesize:13 [2021-01-06 17:14:58,373 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:14:58,375 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:14:58,395 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:14:58,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:14:58,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-01-06 17:14:58,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560322980] [2021-01-06 17:14:58,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:14:58,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:14:58,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:14:58,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:14:58,397 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 17 states. [2021-01-06 17:14:59,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:14:59,644 INFO L93 Difference]: Finished difference Result 131 states and 143 transitions. [2021-01-06 17:14:59,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 17:14:59,645 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 31 [2021-01-06 17:14:59,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:14:59,646 INFO L225 Difference]: With dead ends: 131 [2021-01-06 17:14:59,646 INFO L226 Difference]: Without dead ends: 129 [2021-01-06 17:14:59,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=496, Invalid=1226, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 17:14:59,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-01-06 17:14:59,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 64. [2021-01-06 17:14:59,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 17:14:59,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2021-01-06 17:14:59,658 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 31 [2021-01-06 17:14:59,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:14:59,658 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2021-01-06 17:14:59,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:14:59,659 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2021-01-06 17:14:59,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 17:14:59,659 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:14:59,659 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2021-01-06 17:14:59,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:14:59,875 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:14:59,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:14:59,876 INFO L82 PathProgramCache]: Analyzing trace with hash -415265854, now seen corresponding path program 1 times [2021-01-06 17:14:59,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:14:59,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465683441] [2021-01-06 17:14:59,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:14:59,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:14:59,955 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 17:14:59,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465683441] [2021-01-06 17:14:59,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128540415] [2021-01-06 17:14:59,956 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 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 17:15:00,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:15:00,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 17:15:00,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:15:00,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 17:15:00,132 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:15:00,133 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 39 [2021-01-06 17:15:00,134 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 17:15:00,163 INFO L625 ElimStorePlain]: treesize reduction 16, result has 66.0 percent of original size [2021-01-06 17:15:00,168 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 17:15:00,168 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:36, output treesize:7 [2021-01-06 17:15:00,178 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:15:00,180 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:15:00,188 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 17:15:00,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:15:00,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 9 [2021-01-06 17:15:00,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246153744] [2021-01-06 17:15:00,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:15:00,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:15:00,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:15:00,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:15:00,191 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 7 states. [2021-01-06 17:15:00,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:15:00,299 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2021-01-06 17:15:00,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:15:00,300 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2021-01-06 17:15:00,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:15:00,301 INFO L225 Difference]: With dead ends: 84 [2021-01-06 17:15:00,301 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 17:15:00,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:15:00,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 17:15:00,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2021-01-06 17:15:00,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 17:15:00,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2021-01-06 17:15:00,311 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 35 [2021-01-06 17:15:00,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:15:00,312 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2021-01-06 17:15:00,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:15:00,312 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2021-01-06 17:15:00,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 17:15:00,313 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:15:00,313 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:15:00,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 17:15:00,528 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:15:00,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:15:00,529 INFO L82 PathProgramCache]: Analyzing trace with hash 852356716, now seen corresponding path program 3 times [2021-01-06 17:15:00,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:15:00,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753003516] [2021-01-06 17:15:00,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:15:00,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:15:01,464 WARN L197 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 32 [2021-01-06 17:15:01,980 WARN L197 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 41 [2021-01-06 17:15:03,104 WARN L197 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 137 DAG size of output: 64 [2021-01-06 17:15:04,069 WARN L197 SmtUtils]: Spent 868.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 70 [2021-01-06 17:15:04,703 WARN L197 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 75 [2021-01-06 17:15:04,986 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 36 [2021-01-06 17:15:05,201 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 29 [2021-01-06 17:15:05,420 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 26 [2021-01-06 17:15:05,643 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 29 [2021-01-06 17:15:06,228 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 17:15:06,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753003516] [2021-01-06 17:15:06,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164492171] [2021-01-06 17:15:06,229 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 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 17:15:06,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 17:15:06,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:15:06,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 73 conjunts are in the unsatisfiable core [2021-01-06 17:15:06,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:15:06,388 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-01-06 17:15:06,389 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 17:15:06,391 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:15:06,391 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 17:15:06,392 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:7, output treesize:6 [2021-01-06 17:15:06,587 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:15:06,587 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:15:06,956 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2021-01-06 17:15:06,957 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 17:15:06,974 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:15:06,978 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-01-06 17:15:06,979 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:45, output treesize:37 [2021-01-06 17:15:34,029 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 48 [2021-01-06 17:15:38,172 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 46 [2021-01-06 17:15:38,221 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 59 [2021-01-06 17:15:38,223 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 17:15:38,280 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:15:38,287 INFO L547 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2021-01-06 17:15:38,287 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:103, output treesize:161