/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-DerefFreeMemtrack-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 17:11:03,499 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 17:11:03,502 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 17:11:03,540 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 17:11:03,541 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 17:11:03,543 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 17:11:03,545 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 17:11:03,548 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 17:11:03,550 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 17:11:03,552 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 17:11:03,553 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 17:11:03,555 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 17:11:03,556 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 17:11:03,557 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 17:11:03,559 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 17:11:03,561 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 17:11:03,562 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 17:11:03,564 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 17:11:03,576 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 17:11:03,582 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 17:11:03,588 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 17:11:03,592 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 17:11:03,597 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 17:11:03,598 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 17:11:03,606 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 17:11:03,618 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 17:11:03,619 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 17:11:03,621 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 17:11:03,622 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 17:11:03,624 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 17:11:03,624 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 17:11:03,626 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 17:11:03,626 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 17:11:03,626 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 17:11:03,631 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 17:11:03,632 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 17:11:03,637 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-23 17:11:03,692 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 17:11:03,692 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 17:11:03,698 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 17:11:03,698 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 17:11:03,698 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 17:11:03,699 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 17:11:03,699 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-23 17:11:03,699 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 17:11:03,699 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 17:11:03,699 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-23 17:11:03,700 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-23 17:11:03,700 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-23 17:11:03,701 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 17:11:03,701 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-23 17:11:03,701 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 17:11:03,701 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 17:11:03,702 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 17:11:03,702 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 17:11:03,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 17:11:03,702 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 17:11:03,702 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 17:11:03,703 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 17:11:03,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 17:11:03,703 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 17:11:03,703 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 17:11:04,126 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 17:11:04,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 17:11:04,162 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 17:11:04,163 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 17:11:04,167 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 17:11:04,169 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c [2020-12-23 17:11:04,267 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9e75e723a/af824f31d6d646c093733da78a263c03/FLAGeaad67c15 [2020-12-23 17:11:05,093 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 17:11:05,094 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c [2020-12-23 17:11:05,102 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9e75e723a/af824f31d6d646c093733da78a263c03/FLAGeaad67c15 [2020-12-23 17:11:05,460 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9e75e723a/af824f31d6d646c093733da78a263c03 [2020-12-23 17:11:05,469 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 17:11:05,472 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 17:11:05,474 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 17:11:05,475 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 17:11:05,480 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 17:11:05,481 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 05:11:05" (1/1) ... [2020-12-23 17:11:05,482 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ede033 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:11:05, skipping insertion in model container [2020-12-23 17:11:05,483 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 05:11:05" (1/1) ... [2020-12-23 17:11:05,493 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 17:11:05,510 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~b~0,],[IdentifierExpression[~i~1,]]] left hand side expression in assignment: lhs: VariableLHS[~i~1,] [2020-12-23 17:11:05,701 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 17:11:05,713 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#b~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#b~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~1,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~1,] [2020-12-23 17:11:05,733 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 17:11:05,751 INFO L208 MainTranslator]: Completed translation [2020-12-23 17:11:05,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:11:05 WrapperNode [2020-12-23 17:11:05,752 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 17:11:05,754 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 17:11:05,754 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 17:11:05,754 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 17:11:05,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:11:05" (1/1) ... [2020-12-23 17:11:05,772 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:11:05" (1/1) ... [2020-12-23 17:11:05,798 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 17:11:05,799 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 17:11:05,799 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 17:11:05,799 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 17:11:05,810 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:11:05" (1/1) ... [2020-12-23 17:11:05,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:11:05" (1/1) ... [2020-12-23 17:11:05,813 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:11:05" (1/1) ... [2020-12-23 17:11:05,813 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:11:05" (1/1) ... [2020-12-23 17:11:05,819 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:11:05" (1/1) ... [2020-12-23 17:11:05,825 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:11:05" (1/1) ... [2020-12-23 17:11:05,827 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:11:05" (1/1) ... [2020-12-23 17:11:05,830 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 17:11:05,831 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 17:11:05,831 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 17:11:05,831 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 17:11:05,832 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:11:05" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 17:11:05,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 17:11:05,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 17:11:05,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 17:11:05,952 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 17:11:05,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 17:11:05,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 17:11:06,248 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 17:11:06,248 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-23 17:11:06,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 05:11:06 BoogieIcfgContainer [2020-12-23 17:11:06,251 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 17:11:06,254 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 17:11:06,254 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 17:11:06,260 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 17:11:06,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 05:11:05" (1/3) ... [2020-12-23 17:11:06,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f3f32a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 05:11:06, skipping insertion in model container [2020-12-23 17:11:06,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:11:05" (2/3) ... [2020-12-23 17:11:06,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f3f32a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 05:11:06, skipping insertion in model container [2020-12-23 17:11:06,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 05:11:06" (3/3) ... [2020-12-23 17:11:06,270 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_-write.c [2020-12-23 17:11:06,278 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 17:11:06,284 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-12-23 17:11:06,351 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-12-23 17:11:06,399 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 17:11:06,399 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-23 17:11:06,399 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 17:11:06,399 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 17:11:06,399 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 17:11:06,400 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 17:11:06,400 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 17:11:06,400 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 17:11:06,426 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-12-23 17:11:06,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-23 17:11:06,438 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:11:06,439 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-23 17:11:06,439 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:11:06,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:11:06,449 INFO L82 PathProgramCache]: Analyzing trace with hash 28698920, now seen corresponding path program 1 times [2020-12-23 17:11:06,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:11:06,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950475052] [2020-12-23 17:11:06,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:11:06,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:06,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:11:06,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950475052] [2020-12-23 17:11:06,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:11:06,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 17:11:06,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458849882] [2020-12-23 17:11:06,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 17:11:06,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:11:06,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 17:11:06,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 17:11:06,837 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2020-12-23 17:11:06,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:11:06,926 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2020-12-23 17:11:06,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 17:11:06,933 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-23 17:11:06,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:11:06,967 INFO L225 Difference]: With dead ends: 59 [2020-12-23 17:11:06,967 INFO L226 Difference]: Without dead ends: 55 [2020-12-23 17:11:06,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 17:11:06,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-23 17:11:07,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 31. [2020-12-23 17:11:07,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 17:11:07,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-12-23 17:11:07,023 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 5 [2020-12-23 17:11:07,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:11:07,024 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-12-23 17:11:07,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 17:11:07,024 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-12-23 17:11:07,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 17:11:07,025 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:11:07,025 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 17:11:07,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 17:11:07,026 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:11:07,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:11:07,027 INFO L82 PathProgramCache]: Analyzing trace with hash 889631015, now seen corresponding path program 1 times [2020-12-23 17:11:07,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:11:07,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809955726] [2020-12-23 17:11:07,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:11:07,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:07,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:11:07,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809955726] [2020-12-23 17:11:07,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:11:07,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 17:11:07,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77825435] [2020-12-23 17:11:07,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 17:11:07,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:11:07,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 17:11:07,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 17:11:07,062 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 3 states. [2020-12-23 17:11:07,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:11:07,118 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2020-12-23 17:11:07,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 17:11:07,118 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-23 17:11:07,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:11:07,120 INFO L225 Difference]: With dead ends: 58 [2020-12-23 17:11:07,120 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 17:11:07,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 17:11:07,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 17:11:07,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2020-12-23 17:11:07,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 17:11:07,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-12-23 17:11:07,131 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2020-12-23 17:11:07,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:11:07,132 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-12-23 17:11:07,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 17:11:07,132 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-12-23 17:11:07,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 17:11:07,133 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:11:07,133 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 17:11:07,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 17:11:07,134 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:11:07,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:11:07,136 INFO L82 PathProgramCache]: Analyzing trace with hash 889666573, now seen corresponding path program 1 times [2020-12-23 17:11:07,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:11:07,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388669724] [2020-12-23 17:11:07,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:11:07,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:07,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:11:07,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388669724] [2020-12-23 17:11:07,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:11:07,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 17:11:07,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928343415] [2020-12-23 17:11:07,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 17:11:07,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:11:07,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 17:11:07,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 17:11:07,190 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 4 states. [2020-12-23 17:11:07,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:11:07,290 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-12-23 17:11:07,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 17:11:07,292 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-23 17:11:07,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:11:07,293 INFO L225 Difference]: With dead ends: 32 [2020-12-23 17:11:07,293 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 17:11:07,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 17:11:07,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 17:11:07,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-23 17:11:07,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 17:11:07,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-12-23 17:11:07,308 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2020-12-23 17:11:07,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:11:07,310 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-12-23 17:11:07,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 17:11:07,312 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-12-23 17:11:07,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 17:11:07,313 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:11:07,318 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 17:11:07,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 17:11:07,319 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:11:07,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:11:07,321 INFO L82 PathProgramCache]: Analyzing trace with hash 889666574, now seen corresponding path program 1 times [2020-12-23 17:11:07,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:11:07,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124392766] [2020-12-23 17:11:07,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:11:07,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:07,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:11:07,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124392766] [2020-12-23 17:11:07,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:11:07,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 17:11:07,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824681794] [2020-12-23 17:11:07,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 17:11:07,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:11:07,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 17:11:07,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 17:11:07,463 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 4 states. [2020-12-23 17:11:07,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:11:07,588 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2020-12-23 17:11:07,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 17:11:07,589 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-23 17:11:07,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:11:07,590 INFO L225 Difference]: With dead ends: 55 [2020-12-23 17:11:07,590 INFO L226 Difference]: Without dead ends: 55 [2020-12-23 17:11:07,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 17:11:07,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-23 17:11:07,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2020-12-23 17:11:07,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 17:11:07,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-12-23 17:11:07,600 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2020-12-23 17:11:07,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:11:07,601 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-12-23 17:11:07,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 17:11:07,601 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-12-23 17:11:07,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 17:11:07,602 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:11:07,602 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:11:07,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 17:11:07,602 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:11:07,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:11:07,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1809810359, now seen corresponding path program 1 times [2020-12-23 17:11:07,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:11:07,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062641992] [2020-12-23 17:11:07,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:11:07,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:07,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:11:07,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062641992] [2020-12-23 17:11:07,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:11:07,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 17:11:07,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922521764] [2020-12-23 17:11:07,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 17:11:07,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:11:07,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 17:11:07,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 17:11:07,653 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 4 states. [2020-12-23 17:11:07,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:11:07,735 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2020-12-23 17:11:07,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 17:11:07,736 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-23 17:11:07,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:11:07,737 INFO L225 Difference]: With dead ends: 60 [2020-12-23 17:11:07,738 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 17:11:07,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 17:11:07,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 17:11:07,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 34. [2020-12-23 17:11:07,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 17:11:07,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-12-23 17:11:07,744 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 7 [2020-12-23 17:11:07,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:11:07,745 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-12-23 17:11:07,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 17:11:07,745 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-12-23 17:11:07,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 17:11:07,746 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:11:07,746 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:11:07,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 17:11:07,747 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:11:07,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:11:07,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1480744241, now seen corresponding path program 1 times [2020-12-23 17:11:07,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:11:07,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742496644] [2020-12-23 17:11:07,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:11:07,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:07,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:11:07,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742496644] [2020-12-23 17:11:07,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120648204] [2020-12-23 17:11:07,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:11:07,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:07,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 17:11:07,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:11:07,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:11:07,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:11:07,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2020-12-23 17:11:07,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14651777] [2020-12-23 17:11:07,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 17:11:07,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:11:07,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 17:11:07,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 17:11:07,956 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 4 states. [2020-12-23 17:11:08,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:11:08,013 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2020-12-23 17:11:08,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 17:11:08,014 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-23 17:11:08,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:11:08,016 INFO L225 Difference]: With dead ends: 82 [2020-12-23 17:11:08,016 INFO L226 Difference]: Without dead ends: 82 [2020-12-23 17:11:08,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 17:11:08,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-23 17:11:08,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 38. [2020-12-23 17:11:08,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 17:11:08,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-12-23 17:11:08,038 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 10 [2020-12-23 17:11:08,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:11:08,038 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-12-23 17:11:08,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 17:11:08,043 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-12-23 17:11:08,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 17:11:08,044 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:11:08,045 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:11:08,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 17:11:08,260 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:11:08,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:11:08,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1341568839, now seen corresponding path program 1 times [2020-12-23 17:11:08,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:11:08,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120279830] [2020-12-23 17:11:08,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:11:08,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:08,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 17:11:08,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120279830] [2020-12-23 17:11:08,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:11:08,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 17:11:08,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137463208] [2020-12-23 17:11:08,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 17:11:08,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:11:08,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 17:11:08,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 17:11:08,331 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 5 states. [2020-12-23 17:11:08,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:11:08,431 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2020-12-23 17:11:08,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 17:11:08,431 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-23 17:11:08,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:11:08,432 INFO L225 Difference]: With dead ends: 57 [2020-12-23 17:11:08,432 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 17:11:08,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 17:11:08,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 17:11:08,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 37. [2020-12-23 17:11:08,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 17:11:08,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-12-23 17:11:08,438 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 11 [2020-12-23 17:11:08,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:11:08,438 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-12-23 17:11:08,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 17:11:08,438 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-12-23 17:11:08,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 17:11:08,439 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:11:08,439 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:11:08,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 17:11:08,440 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:11:08,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:11:08,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1361088610, now seen corresponding path program 1 times [2020-12-23 17:11:08,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:11:08,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55168284] [2020-12-23 17:11:08,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:11:08,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:08,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:11:08,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55168284] [2020-12-23 17:11:08,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648177325] [2020-12-23 17:11:08,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:11:08,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:08,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 17:11:08,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:11:08,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:11:08,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:11:08,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-23 17:11:08,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042123977] [2020-12-23 17:11:08,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 17:11:08,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:11:08,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 17:11:08,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-12-23 17:11:08,622 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 8 states. [2020-12-23 17:11:08,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:11:08,796 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2020-12-23 17:11:08,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 17:11:08,797 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-12-23 17:11:08,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:11:08,798 INFO L225 Difference]: With dead ends: 70 [2020-12-23 17:11:08,798 INFO L226 Difference]: Without dead ends: 70 [2020-12-23 17:11:08,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2020-12-23 17:11:08,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-23 17:11:08,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 36. [2020-12-23 17:11:08,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 17:11:08,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-12-23 17:11:08,803 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 12 [2020-12-23 17:11:08,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:11:08,803 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-12-23 17:11:08,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 17:11:08,803 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-12-23 17:11:08,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 17:11:08,804 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:11:08,804 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1] [2020-12-23 17:11:09,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:11:09,018 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:11:09,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:11:09,020 INFO L82 PathProgramCache]: Analyzing trace with hash 2073745800, now seen corresponding path program 2 times [2020-12-23 17:11:09,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:11:09,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503659994] [2020-12-23 17:11:09,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:11:09,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:09,080 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:11:09,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503659994] [2020-12-23 17:11:09,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239283753] [2020-12-23 17:11:09,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:11:09,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 17:11:09,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:11:09,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 17:11:09,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:11:09,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:11:09,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 17:11:09,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2020-12-23 17:11:09,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752186079] [2020-12-23 17:11:09,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 17:11:09,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:11:09,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 17:11:09,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-12-23 17:11:09,248 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 6 states. [2020-12-23 17:11:09,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:11:09,429 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2020-12-23 17:11:09,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 17:11:09,430 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-23 17:11:09,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:11:09,431 INFO L225 Difference]: With dead ends: 83 [2020-12-23 17:11:09,432 INFO L226 Difference]: Without dead ends: 83 [2020-12-23 17:11:09,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-12-23 17:11:09,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-23 17:11:09,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 47. [2020-12-23 17:11:09,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 17:11:09,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2020-12-23 17:11:09,439 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 15 [2020-12-23 17:11:09,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:11:09,440 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2020-12-23 17:11:09,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 17:11:09,441 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2020-12-23 17:11:09,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 17:11:09,441 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:11:09,442 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:11:09,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:11:09,657 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:11:09,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:11:09,658 INFO L82 PathProgramCache]: Analyzing trace with hash 4840471, now seen corresponding path program 2 times [2020-12-23 17:11:09,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:11:09,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826408223] [2020-12-23 17:11:09,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:11:09,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:09,716 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 17:11:09,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826408223] [2020-12-23 17:11:09,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:11:09,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 17:11:09,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073379948] [2020-12-23 17:11:09,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 17:11:09,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:11:09,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 17:11:09,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 17:11:09,721 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 3 states. [2020-12-23 17:11:09,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:11:09,738 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2020-12-23 17:11:09,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 17:11:09,739 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-23 17:11:09,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:11:09,739 INFO L225 Difference]: With dead ends: 45 [2020-12-23 17:11:09,740 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 17:11:09,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 17:11:09,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 17:11:09,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-23 17:11:09,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 17:11:09,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-12-23 17:11:09,744 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 17 [2020-12-23 17:11:09,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:11:09,744 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-12-23 17:11:09,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 17:11:09,744 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-12-23 17:11:09,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 17:11:09,745 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:11:09,745 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:11:09,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 17:11:09,746 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:11:09,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:11:09,747 INFO L82 PathProgramCache]: Analyzing trace with hash 4840472, now seen corresponding path program 1 times [2020-12-23 17:11:09,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:11:09,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033163580] [2020-12-23 17:11:09,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:11:09,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:09,820 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 17:11:09,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033163580] [2020-12-23 17:11:09,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:11:09,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 17:11:09,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755533478] [2020-12-23 17:11:09,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 17:11:09,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:11:09,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 17:11:09,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 17:11:09,823 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 4 states. [2020-12-23 17:11:09,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:11:09,875 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2020-12-23 17:11:09,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 17:11:09,875 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-12-23 17:11:09,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:11:09,877 INFO L225 Difference]: With dead ends: 50 [2020-12-23 17:11:09,877 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 17:11:09,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 17:11:09,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 17:11:09,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-12-23 17:11:09,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 17:11:09,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-12-23 17:11:09,894 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 17 [2020-12-23 17:11:09,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:11:09,894 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-12-23 17:11:09,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 17:11:09,895 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-12-23 17:11:09,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 17:11:09,896 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:11:09,896 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:11:09,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-23 17:11:09,900 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:11:09,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:11:09,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1949815299, now seen corresponding path program 1 times [2020-12-23 17:11:09,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:11:09,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846442984] [2020-12-23 17:11:09,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:11:09,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:10,035 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 17:11:10,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846442984] [2020-12-23 17:11:10,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649156818] [2020-12-23 17:11:10,036 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 [2020-12-23 17:11:10,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:10,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 17:11:10,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:11:10,174 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 17:11:10,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:11:10,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-12-23 17:11:10,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689688811] [2020-12-23 17:11:10,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 17:11:10,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:11:10,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 17:11:10,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 17:11:10,182 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 7 states. [2020-12-23 17:11:10,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:11:10,271 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2020-12-23 17:11:10,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 17:11:10,271 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-12-23 17:11:10,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:11:10,272 INFO L225 Difference]: With dead ends: 84 [2020-12-23 17:11:10,272 INFO L226 Difference]: Without dead ends: 84 [2020-12-23 17:11:10,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-23 17:11:10,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-23 17:11:10,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 55. [2020-12-23 17:11:10,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 17:11:10,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2020-12-23 17:11:10,276 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 23 [2020-12-23 17:11:10,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:11:10,277 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2020-12-23 17:11:10,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 17:11:10,277 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2020-12-23 17:11:10,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 17:11:10,278 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:11:10,278 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:11:10,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:11:10,493 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:11:10,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:11:10,495 INFO L82 PathProgramCache]: Analyzing trace with hash 31456339, now seen corresponding path program 1 times [2020-12-23 17:11:10,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:11:10,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77727317] [2020-12-23 17:11:10,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:11:10,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:10,554 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 17:11:10,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77727317] [2020-12-23 17:11:10,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856234056] [2020-12-23 17:11:10,555 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 [2020-12-23 17:11:10,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:10,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 17:11:10,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:11:10,658 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 17:11:10,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:11:10,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2020-12-23 17:11:10,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106324772] [2020-12-23 17:11:10,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 17:11:10,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:11:10,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 17:11:10,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 17:11:10,661 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 5 states. [2020-12-23 17:11:10,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:11:10,706 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2020-12-23 17:11:10,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 17:11:10,706 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2020-12-23 17:11:10,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:11:10,707 INFO L225 Difference]: With dead ends: 85 [2020-12-23 17:11:10,707 INFO L226 Difference]: Without dead ends: 85 [2020-12-23 17:11:10,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 17:11:10,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-23 17:11:10,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 60. [2020-12-23 17:11:10,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 17:11:10,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2020-12-23 17:11:10,711 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 32 [2020-12-23 17:11:10,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:11:10,712 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2020-12-23 17:11:10,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 17:11:10,712 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2020-12-23 17:11:10,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 17:11:10,713 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:11:10,713 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 17:11:10,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 17:11:10,928 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:11:10,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:11:10,929 INFO L82 PathProgramCache]: Analyzing trace with hash 164722723, now seen corresponding path program 1 times [2020-12-23 17:11:10,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:11:10,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47543945] [2020-12-23 17:11:10,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:11:10,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:11,111 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 17:11:11,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47543945] [2020-12-23 17:11:11,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385629590] [2020-12-23 17:11:11,112 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:11:11,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:11,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 17:11:11,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:11:11,298 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 17:11:11,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:11:11,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2020-12-23 17:11:11,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455011108] [2020-12-23 17:11:11,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 17:11:11,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:11:11,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 17:11:11,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-12-23 17:11:11,301 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 12 states. [2020-12-23 17:11:11,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:11:11,603 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2020-12-23 17:11:11,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 17:11:11,604 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-12-23 17:11:11,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:11:11,606 INFO L225 Difference]: With dead ends: 66 [2020-12-23 17:11:11,606 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 17:11:11,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-12-23 17:11:11,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 17:11:11,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2020-12-23 17:11:11,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 17:11:11,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2020-12-23 17:11:11,610 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 34 [2020-12-23 17:11:11,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:11:11,611 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2020-12-23 17:11:11,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 17:11:11,611 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2020-12-23 17:11:11,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 17:11:11,612 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:11:11,612 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:11:11,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:11:11,827 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:11:11,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:11:11,828 INFO L82 PathProgramCache]: Analyzing trace with hash -414723452, now seen corresponding path program 2 times [2020-12-23 17:11:11,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:11:11,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114801928] [2020-12-23 17:11:11,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:11:11,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:11,945 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 17:11:11,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114801928] [2020-12-23 17:11:11,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505495864] [2020-12-23 17:11:11,946 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:11:12,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 17:11:12,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:11:12,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 17:11:12,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:11:12,171 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 23 proven. 37 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 17:11:12,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:11:12,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2020-12-23 17:11:12,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415246831] [2020-12-23 17:11:12,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 17:11:12,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:11:12,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 17:11:12,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-12-23 17:11:12,174 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 14 states. [2020-12-23 17:11:12,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:11:12,525 INFO L93 Difference]: Finished difference Result 118 states and 123 transitions. [2020-12-23 17:11:12,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 17:11:12,526 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-12-23 17:11:12,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:11:12,527 INFO L225 Difference]: With dead ends: 118 [2020-12-23 17:11:12,527 INFO L226 Difference]: Without dead ends: 118 [2020-12-23 17:11:12,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2020-12-23 17:11:12,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-23 17:11:12,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 76. [2020-12-23 17:11:12,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 17:11:12,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2020-12-23 17:11:12,532 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 37 [2020-12-23 17:11:12,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:11:12,532 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2020-12-23 17:11:12,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 17:11:12,533 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2020-12-23 17:11:12,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 17:11:12,534 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:11:12,534 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 17:11:12,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 17:11:12,749 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:11:12,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:11:12,750 INFO L82 PathProgramCache]: Analyzing trace with hash 882673172, now seen corresponding path program 2 times [2020-12-23 17:11:12,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:11:12,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354245274] [2020-12-23 17:11:12,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:11:12,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:12,896 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-23 17:11:12,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354245274] [2020-12-23 17:11:12,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607671868] [2020-12-23 17:11:12,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:11:12,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 17:11:12,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:11:12,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 17:11:12,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:11:13,006 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_10|], 1=[|v_#valid_20|]} [2020-12-23 17:11:13,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 17:11:13,028 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 17:11:13,029 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:11:13,039 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:11:13,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 17:11:13,048 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 5 treesize of output 3 [2020-12-23 17:11:13,049 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 17:11:13,056 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:11:13,058 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 17:11:13,058 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:17 [2020-12-23 17:11:13,293 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-23 17:11:13,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 17:11:13,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2020-12-23 17:11:13,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109142973] [2020-12-23 17:11:13,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 17:11:13,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:11:13,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 17:11:13,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-23 17:11:13,296 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 5 states. [2020-12-23 17:11:13,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:11:13,355 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2020-12-23 17:11:13,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 17:11:13,356 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2020-12-23 17:11:13,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:11:13,357 INFO L225 Difference]: With dead ends: 75 [2020-12-23 17:11:13,357 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 17:11:13,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-23 17:11:13,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 17:11:13,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-12-23 17:11:13,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-23 17:11:13,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2020-12-23 17:11:13,360 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 39 [2020-12-23 17:11:13,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:11:13,361 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2020-12-23 17:11:13,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 17:11:13,361 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2020-12-23 17:11:13,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 17:11:13,362 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:11:13,363 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:11:13,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 17:11:13,573 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:11:13,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:11:13,574 INFO L82 PathProgramCache]: Analyzing trace with hash 268859179, now seen corresponding path program 1 times [2020-12-23 17:11:13,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:11:13,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422819257] [2020-12-23 17:11:13,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:11:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:13,660 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-23 17:11:13,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422819257] [2020-12-23 17:11:13,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870687419] [2020-12-23 17:11:13,661 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:11:13,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:13,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 17:11:13,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:11:13,819 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-23 17:11:13,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:11:13,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 8 [2020-12-23 17:11:13,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556645433] [2020-12-23 17:11:13,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 17:11:13,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:11:13,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 17:11:13,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2020-12-23 17:11:13,822 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 8 states. [2020-12-23 17:11:13,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:11:13,907 INFO L93 Difference]: Finished difference Result 119 states and 123 transitions. [2020-12-23 17:11:13,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 17:11:13,908 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 48 [2020-12-23 17:11:13,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:11:13,909 INFO L225 Difference]: With dead ends: 119 [2020-12-23 17:11:13,910 INFO L226 Difference]: Without dead ends: 119 [2020-12-23 17:11:13,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2020-12-23 17:11:13,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-12-23 17:11:13,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 84. [2020-12-23 17:11:13,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-23 17:11:13,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2020-12-23 17:11:13,921 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 48 [2020-12-23 17:11:13,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:11:13,922 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2020-12-23 17:11:13,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 17:11:13,922 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2020-12-23 17:11:13,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-23 17:11:13,925 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:11:13,925 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2020-12-23 17:11:14,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 17:11:14,139 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:11:14,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:11:14,141 INFO L82 PathProgramCache]: Analyzing trace with hash 524134016, now seen corresponding path program 3 times [2020-12-23 17:11:14,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:11:14,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564540853] [2020-12-23 17:11:14,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:11:14,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:14,268 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 93 proven. 21 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-12-23 17:11:14,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564540853] [2020-12-23 17:11:14,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091254507] [2020-12-23 17:11:14,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:11:14,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 17:11:14,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:11:14,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 17:11:14,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:11:14,489 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 93 proven. 21 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-12-23 17:11:14,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:11:14,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2020-12-23 17:11:14,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915267491] [2020-12-23 17:11:14,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 17:11:14,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:11:14,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 17:11:14,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-23 17:11:14,491 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand 11 states. [2020-12-23 17:11:14,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:11:14,598 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2020-12-23 17:11:14,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 17:11:14,598 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-12-23 17:11:14,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:11:14,599 INFO L225 Difference]: With dead ends: 116 [2020-12-23 17:11:14,599 INFO L226 Difference]: Without dead ends: 116 [2020-12-23 17:11:14,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-23 17:11:14,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-23 17:11:14,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 89. [2020-12-23 17:11:14,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-23 17:11:14,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2020-12-23 17:11:14,603 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 59 [2020-12-23 17:11:14,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:11:14,604 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2020-12-23 17:11:14,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 17:11:14,604 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2020-12-23 17:11:14,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 17:11:14,605 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:11:14,606 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2020-12-23 17:11:14,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 17:11:14,820 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:11:14,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:11:14,821 INFO L82 PathProgramCache]: Analyzing trace with hash 11435127, now seen corresponding path program 4 times [2020-12-23 17:11:14,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:11:14,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294158819] [2020-12-23 17:11:14,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:11:14,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:15,046 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 117 proven. 102 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 17:11:15,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294158819] [2020-12-23 17:11:15,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247925853] [2020-12-23 17:11:15,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:11:15,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 17:11:15,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:11:15,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 17:11:15,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:11:15,326 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 43 proven. 159 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-23 17:11:15,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:11:15,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2020-12-23 17:11:15,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355874017] [2020-12-23 17:11:15,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 17:11:15,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:11:15,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 17:11:15,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2020-12-23 17:11:15,328 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand 19 states. [2020-12-23 17:11:16,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:11:16,105 INFO L93 Difference]: Finished difference Result 173 states and 180 transitions. [2020-12-23 17:11:16,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 17:11:16,105 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 64 [2020-12-23 17:11:16,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:11:16,112 INFO L225 Difference]: With dead ends: 173 [2020-12-23 17:11:16,112 INFO L226 Difference]: Without dead ends: 173 [2020-12-23 17:11:16,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=333, Invalid=1149, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 17:11:16,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-12-23 17:11:16,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 110. [2020-12-23 17:11:16,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-23 17:11:16,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 117 transitions. [2020-12-23 17:11:16,126 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 117 transitions. Word has length 64 [2020-12-23 17:11:16,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:11:16,128 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 117 transitions. [2020-12-23 17:11:16,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 17:11:16,129 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 117 transitions. [2020-12-23 17:11:16,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-23 17:11:16,131 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:11:16,131 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:11:16,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:11:16,347 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:11:16,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:11:16,348 INFO L82 PathProgramCache]: Analyzing trace with hash -827578536, now seen corresponding path program 2 times [2020-12-23 17:11:16,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:11:16,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245683071] [2020-12-23 17:11:16,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:11:16,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:16,535 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-12-23 17:11:16,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245683071] [2020-12-23 17:11:16,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074657062] [2020-12-23 17:11:16,536 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:11:16,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 17:11:16,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:11:16,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 17:11:16,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:11:16,728 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-12-23 17:11:16,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 17:11:16,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2020-12-23 17:11:16,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760939782] [2020-12-23 17:11:16,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 17:11:16,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:11:16,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 17:11:16,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-12-23 17:11:16,730 INFO L87 Difference]: Start difference. First operand 110 states and 117 transitions. Second operand 4 states. [2020-12-23 17:11:16,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:11:16,757 INFO L93 Difference]: Finished difference Result 109 states and 116 transitions. [2020-12-23 17:11:16,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 17:11:16,757 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-12-23 17:11:16,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:11:16,758 INFO L225 Difference]: With dead ends: 109 [2020-12-23 17:11:16,758 INFO L226 Difference]: Without dead ends: 92 [2020-12-23 17:11:16,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-12-23 17:11:16,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-23 17:11:16,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-12-23 17:11:16,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 17:11:16,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2020-12-23 17:11:16,762 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 75 [2020-12-23 17:11:16,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:11:16,762 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2020-12-23 17:11:16,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 17:11:16,763 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2020-12-23 17:11:16,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-23 17:11:16,763 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:11:16,764 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2020-12-23 17:11:16,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:11:16,979 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:11:16,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:11:16,980 INFO L82 PathProgramCache]: Analyzing trace with hash -875547996, now seen corresponding path program 5 times [2020-12-23 17:11:16,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:11:16,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433875757] [2020-12-23 17:11:16,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:11:17,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:17,074 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-12-23 17:11:17,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433875757] [2020-12-23 17:11:17,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228220686] [2020-12-23 17:11:17,075 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:11:17,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 17:11:17,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:11:17,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 17:11:17,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:11:17,328 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-12-23 17:11:17,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:11:17,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2020-12-23 17:11:17,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158875522] [2020-12-23 17:11:17,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 17:11:17,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:11:17,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 17:11:17,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-23 17:11:17,331 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand 8 states. [2020-12-23 17:11:17,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:11:17,468 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2020-12-23 17:11:17,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 17:11:17,468 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 91 [2020-12-23 17:11:17,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:11:17,469 INFO L225 Difference]: With dead ends: 106 [2020-12-23 17:11:17,469 INFO L226 Difference]: Without dead ends: 106 [2020-12-23 17:11:17,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-23 17:11:17,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-23 17:11:17,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 97. [2020-12-23 17:11:17,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-23 17:11:17,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2020-12-23 17:11:17,473 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 91 [2020-12-23 17:11:17,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:11:17,474 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2020-12-23 17:11:17,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 17:11:17,474 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2020-12-23 17:11:17,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-23 17:11:17,475 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:11:17,475 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2020-12-23 17:11:17,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 17:11:17,690 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:11:17,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:11:17,691 INFO L82 PathProgramCache]: Analyzing trace with hash -2092833069, now seen corresponding path program 6 times [2020-12-23 17:11:17,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:11:17,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769791295] [2020-12-23 17:11:17,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:11:17,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:17,912 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 318 proven. 165 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-12-23 17:11:17,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769791295] [2020-12-23 17:11:17,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141484657] [2020-12-23 17:11:17,913 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:11:18,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-12-23 17:11:18,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:11:18,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 17:11:18,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:11:18,203 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 17 proven. 438 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2020-12-23 17:11:18,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:11:18,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 21 [2020-12-23 17:11:18,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792515782] [2020-12-23 17:11:18,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 17:11:18,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:11:18,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 17:11:18,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-12-23 17:11:18,205 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 21 states. [2020-12-23 17:11:19,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:11:19,241 INFO L93 Difference]: Finished difference Result 138 states and 144 transitions. [2020-12-23 17:11:19,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 17:11:19,242 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 96 [2020-12-23 17:11:19,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:11:19,246 INFO L225 Difference]: With dead ends: 138 [2020-12-23 17:11:19,247 INFO L226 Difference]: Without dead ends: 138 [2020-12-23 17:11:19,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=507, Invalid=1655, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 17:11:19,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-23 17:11:19,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 129. [2020-12-23 17:11:19,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-12-23 17:11:19,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 135 transitions. [2020-12-23 17:11:19,253 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 135 transitions. Word has length 96 [2020-12-23 17:11:19,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:11:19,254 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 135 transitions. [2020-12-23 17:11:19,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 17:11:19,254 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 135 transitions. [2020-12-23 17:11:19,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-23 17:11:19,255 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:11:19,256 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1] [2020-12-23 17:11:19,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:11:19,459 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:11:19,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:11:19,460 INFO L82 PathProgramCache]: Analyzing trace with hash -2026577617, now seen corresponding path program 7 times [2020-12-23 17:11:19,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:11:19,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514328065] [2020-12-23 17:11:19,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:11:19,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:19,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 402 proven. 60 refuted. 0 times theorem prover too weak. 557 trivial. 0 not checked. [2020-12-23 17:11:19,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514328065] [2020-12-23 17:11:19,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639203376] [2020-12-23 17:11:19,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:11:19,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:19,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 17:11:19,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:11:19,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 402 proven. 60 refuted. 0 times theorem prover too weak. 557 trivial. 0 not checked. [2020-12-23 17:11:19,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:11:19,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-12-23 17:11:19,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64299977] [2020-12-23 17:11:19,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 17:11:19,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:11:19,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 17:11:19,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-23 17:11:19,823 INFO L87 Difference]: Start difference. First operand 129 states and 135 transitions. Second operand 8 states. [2020-12-23 17:11:19,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:11:19,984 INFO L93 Difference]: Finished difference Result 143 states and 150 transitions. [2020-12-23 17:11:19,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 17:11:19,984 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 128 [2020-12-23 17:11:19,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:11:19,986 INFO L225 Difference]: With dead ends: 143 [2020-12-23 17:11:19,986 INFO L226 Difference]: Without dead ends: 143 [2020-12-23 17:11:19,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-23 17:11:19,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-12-23 17:11:19,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 134. [2020-12-23 17:11:19,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-23 17:11:19,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 141 transitions. [2020-12-23 17:11:19,991 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 141 transitions. Word has length 128 [2020-12-23 17:11:19,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:11:19,991 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 141 transitions. [2020-12-23 17:11:19,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 17:11:19,992 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 141 transitions. [2020-12-23 17:11:19,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-23 17:11:19,993 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:11:19,993 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1] [2020-12-23 17:11:20,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 17:11:20,207 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:11:20,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:11:20,208 INFO L82 PathProgramCache]: Analyzing trace with hash 516658984, now seen corresponding path program 8 times [2020-12-23 17:11:20,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:11:20,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498633136] [2020-12-23 17:11:20,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:11:20,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:20,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1120 backedges. 646 proven. 243 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-12-23 17:11:20,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498633136] [2020-12-23 17:11:20,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235743996] [2020-12-23 17:11:20,495 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:11:20,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 17:11:20,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:11:20,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 17:11:20,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:11:21,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1120 backedges. 101 proven. 905 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-12-23 17:11:21,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:11:21,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 27 [2020-12-23 17:11:21,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166304148] [2020-12-23 17:11:21,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 17:11:21,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:11:21,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 17:11:21,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2020-12-23 17:11:21,043 INFO L87 Difference]: Start difference. First operand 134 states and 141 transitions. Second operand 27 states. [2020-12-23 17:11:22,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:11:22,392 INFO L93 Difference]: Finished difference Result 198 states and 208 transitions. [2020-12-23 17:11:22,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-23 17:11:22,392 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 133 [2020-12-23 17:11:22,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:11:22,394 INFO L225 Difference]: With dead ends: 198 [2020-12-23 17:11:22,394 INFO L226 Difference]: Without dead ends: 198 [2020-12-23 17:11:22,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=745, Invalid=3037, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 17:11:22,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-12-23 17:11:22,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 171. [2020-12-23 17:11:22,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-12-23 17:11:22,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 181 transitions. [2020-12-23 17:11:22,402 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 181 transitions. Word has length 133 [2020-12-23 17:11:22,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:11:22,403 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 181 transitions. [2020-12-23 17:11:22,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 17:11:22,403 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 181 transitions. [2020-12-23 17:11:22,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-12-23 17:11:22,405 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:11:22,405 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1] [2020-12-23 17:11:22,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:11:22,620 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:11:22,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:11:22,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1358817267, now seen corresponding path program 9 times [2020-12-23 17:11:22,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:11:22,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508880590] [2020-12-23 17:11:22,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:11:22,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:22,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1887 backedges. 675 proven. 87 refuted. 0 times theorem prover too weak. 1125 trivial. 0 not checked. [2020-12-23 17:11:22,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508880590] [2020-12-23 17:11:22,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500717938] [2020-12-23 17:11:22,829 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:11:22,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-23 17:11:22,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:11:22,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 17:11:22,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:11:23,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1887 backedges. 675 proven. 87 refuted. 0 times theorem prover too weak. 1125 trivial. 0 not checked. [2020-12-23 17:11:23,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:11:23,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2020-12-23 17:11:23,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322560649] [2020-12-23 17:11:23,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 17:11:23,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:11:23,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 17:11:23,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-12-23 17:11:23,186 INFO L87 Difference]: Start difference. First operand 171 states and 181 transitions. Second operand 17 states. [2020-12-23 17:11:23,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:11:23,363 INFO L93 Difference]: Finished difference Result 185 states and 196 transitions. [2020-12-23 17:11:23,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 17:11:23,363 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 170 [2020-12-23 17:11:23,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:11:23,366 INFO L225 Difference]: With dead ends: 185 [2020-12-23 17:11:23,366 INFO L226 Difference]: Without dead ends: 185 [2020-12-23 17:11:23,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-12-23 17:11:23,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-12-23 17:11:23,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 176. [2020-12-23 17:11:23,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-12-23 17:11:23,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 187 transitions. [2020-12-23 17:11:23,371 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 187 transitions. Word has length 170 [2020-12-23 17:11:23,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:11:23,372 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 187 transitions. [2020-12-23 17:11:23,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 17:11:23,372 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 187 transitions. [2020-12-23 17:11:23,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-12-23 17:11:23,374 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:11:23,374 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1] [2020-12-23 17:11:23,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 17:11:23,588 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:11:23,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:11:23,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1775490332, now seen corresponding path program 10 times [2020-12-23 17:11:23,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:11:23,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883748797] [2020-12-23 17:11:23,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:11:23,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:23,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2024 backedges. 1131 proven. 336 refuted. 0 times theorem prover too weak. 557 trivial. 0 not checked. [2020-12-23 17:11:23,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883748797] [2020-12-23 17:11:23,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639181520] [2020-12-23 17:11:23,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:11:24,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 17:11:24,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:11:24,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 17:11:24,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:11:24,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2024 backedges. 139 proven. 1690 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2020-12-23 17:11:24,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:11:24,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 31 [2020-12-23 17:11:24,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89711208] [2020-12-23 17:11:24,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 17:11:24,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:11:24,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 17:11:24,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=757, Unknown=0, NotChecked=0, Total=930 [2020-12-23 17:11:24,578 INFO L87 Difference]: Start difference. First operand 176 states and 187 transitions. Second operand 31 states. [2020-12-23 17:11:26,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:11:26,515 INFO L93 Difference]: Finished difference Result 251 states and 266 transitions. [2020-12-23 17:11:26,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-23 17:11:26,516 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 175 [2020-12-23 17:11:26,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:11:26,518 INFO L225 Difference]: With dead ends: 251 [2020-12-23 17:11:26,518 INFO L226 Difference]: Without dead ends: 251 [2020-12-23 17:11:26,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1092, Invalid=4760, Unknown=0, NotChecked=0, Total=5852 [2020-12-23 17:11:26,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-12-23 17:11:26,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 218. [2020-12-23 17:11:26,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-12-23 17:11:26,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 233 transitions. [2020-12-23 17:11:26,526 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 233 transitions. Word has length 175 [2020-12-23 17:11:26,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:11:26,527 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 233 transitions. [2020-12-23 17:11:26,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 17:11:26,527 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 233 transitions. [2020-12-23 17:11:26,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-12-23 17:11:26,530 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:11:26,530 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1] [2020-12-23 17:11:26,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 17:11:26,746 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:11:26,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:11:26,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1003334752, now seen corresponding path program 11 times [2020-12-23 17:11:26,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:11:26,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368585291] [2020-12-23 17:11:26,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:11:26,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:26,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3194 backedges. 1047 proven. 119 refuted. 0 times theorem prover too weak. 2028 trivial. 0 not checked. [2020-12-23 17:11:26,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368585291] [2020-12-23 17:11:26,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347120499] [2020-12-23 17:11:26,970 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:11:27,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-12-23 17:11:27,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:11:27,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 17:11:27,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:11:27,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3194 backedges. 1047 proven. 119 refuted. 0 times theorem prover too weak. 2028 trivial. 0 not checked. [2020-12-23 17:11:27,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:11:27,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2020-12-23 17:11:27,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730158270] [2020-12-23 17:11:27,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 17:11:27,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:11:27,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 17:11:27,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-12-23 17:11:27,508 INFO L87 Difference]: Start difference. First operand 218 states and 233 transitions. Second operand 11 states. [2020-12-23 17:11:27,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:11:27,833 INFO L93 Difference]: Finished difference Result 232 states and 248 transitions. [2020-12-23 17:11:27,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 17:11:27,833 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 217 [2020-12-23 17:11:27,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:11:27,835 INFO L225 Difference]: With dead ends: 232 [2020-12-23 17:11:27,836 INFO L226 Difference]: Without dead ends: 232 [2020-12-23 17:11:27,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 214 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-12-23 17:11:27,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-12-23 17:11:27,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 223. [2020-12-23 17:11:27,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-12-23 17:11:27,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 239 transitions. [2020-12-23 17:11:27,848 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 239 transitions. Word has length 217 [2020-12-23 17:11:27,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:11:27,850 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 239 transitions. [2020-12-23 17:11:27,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 17:11:27,850 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 239 transitions. [2020-12-23 17:11:27,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-12-23 17:11:27,853 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:11:27,853 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1] [2020-12-23 17:11:28,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 17:11:28,068 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:11:28,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:11:28,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1053228201, now seen corresponding path program 12 times [2020-12-23 17:11:28,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:11:28,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595099306] [2020-12-23 17:11:28,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:11:28,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:28,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3372 backedges. 1803 proven. 444 refuted. 0 times theorem prover too weak. 1125 trivial. 0 not checked. [2020-12-23 17:11:28,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595099306] [2020-12-23 17:11:28,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838250321] [2020-12-23 17:11:28,544 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:11:28,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-12-23 17:11:28,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:11:28,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 17:11:28,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:11:29,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3372 backedges. 29 proven. 2917 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2020-12-23 17:11:29,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:11:29,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12] total 30 [2020-12-23 17:11:29,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281359756] [2020-12-23 17:11:29,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 17:11:29,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:11:29,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 17:11:29,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2020-12-23 17:11:29,253 INFO L87 Difference]: Start difference. First operand 223 states and 239 transitions. Second operand 30 states. [2020-12-23 17:11:31,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:11:31,918 INFO L93 Difference]: Finished difference Result 279 states and 300 transitions. [2020-12-23 17:11:31,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-23 17:11:31,918 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 222 [2020-12-23 17:11:31,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:11:31,921 INFO L225 Difference]: With dead ends: 279 [2020-12-23 17:11:31,921 INFO L226 Difference]: Without dead ends: 279 [2020-12-23 17:11:31,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2065 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1647, Invalid=5663, Unknown=0, NotChecked=0, Total=7310 [2020-12-23 17:11:31,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-12-23 17:11:31,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 270. [2020-12-23 17:11:31,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-12-23 17:11:31,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 291 transitions. [2020-12-23 17:11:31,930 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 291 transitions. Word has length 222 [2020-12-23 17:11:31,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:11:31,931 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 291 transitions. [2020-12-23 17:11:31,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 17:11:31,931 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 291 transitions. [2020-12-23 17:11:31,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-12-23 17:11:31,935 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:11:31,935 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 43, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1] [2020-12-23 17:11:32,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 17:11:32,151 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:11:32,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:11:32,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1152916860, now seen corresponding path program 13 times [2020-12-23 17:11:32,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:11:32,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357583658] [2020-12-23 17:11:32,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:11:32,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:32,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5063 backedges. 1533 proven. 156 refuted. 0 times theorem prover too weak. 3374 trivial. 0 not checked. [2020-12-23 17:11:32,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357583658] [2020-12-23 17:11:32,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352821028] [2020-12-23 17:11:32,420 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:11:32,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:32,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 17:11:32,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:11:32,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5063 backedges. 1533 proven. 156 refuted. 0 times theorem prover too weak. 3374 trivial. 0 not checked. [2020-12-23 17:11:32,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:11:32,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-12-23 17:11:32,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727687363] [2020-12-23 17:11:32,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 17:11:32,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:11:32,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 17:11:32,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-12-23 17:11:32,820 INFO L87 Difference]: Start difference. First operand 270 states and 291 transitions. Second operand 11 states. [2020-12-23 17:11:33,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:11:33,253 INFO L93 Difference]: Finished difference Result 284 states and 306 transitions. [2020-12-23 17:11:33,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 17:11:33,254 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 269 [2020-12-23 17:11:33,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:11:33,256 INFO L225 Difference]: With dead ends: 284 [2020-12-23 17:11:33,256 INFO L226 Difference]: Without dead ends: 284 [2020-12-23 17:11:33,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 268 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-12-23 17:11:33,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-12-23 17:11:33,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 275. [2020-12-23 17:11:33,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-12-23 17:11:33,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 297 transitions. [2020-12-23 17:11:33,264 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 297 transitions. Word has length 269 [2020-12-23 17:11:33,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:11:33,265 INFO L481 AbstractCegarLoop]: Abstraction has 275 states and 297 transitions. [2020-12-23 17:11:33,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 17:11:33,265 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 297 transitions. [2020-12-23 17:11:33,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2020-12-23 17:11:33,267 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:11:33,268 INFO L422 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 44, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1] [2020-12-23 17:11:33,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 17:11:33,483 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:11:33,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:11:33,483 INFO L82 PathProgramCache]: Analyzing trace with hash -998432013, now seen corresponding path program 14 times [2020-12-23 17:11:33,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:11:33,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049199978] [2020-12-23 17:11:33,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:11:33,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:33,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5287 backedges. 2692 proven. 567 refuted. 0 times theorem prover too weak. 2028 trivial. 0 not checked. [2020-12-23 17:11:33,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049199978] [2020-12-23 17:11:33,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180877295] [2020-12-23 17:11:33,997 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:11:34,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 17:11:34,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:11:34,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 780 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 17:11:34,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:11:34,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5287 backedges. 233 proven. 4599 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2020-12-23 17:11:34,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:11:34,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 39 [2020-12-23 17:11:34,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62293184] [2020-12-23 17:11:34,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 17:11:34,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:11:34,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 17:11:34,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1216, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 17:11:34,805 INFO L87 Difference]: Start difference. First operand 275 states and 297 transitions. Second operand 39 states. [2020-12-23 17:11:38,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:11:38,293 INFO L93 Difference]: Finished difference Result 372 states and 400 transitions. [2020-12-23 17:11:38,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-12-23 17:11:38,293 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 274 [2020-12-23 17:11:38,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:11:38,297 INFO L225 Difference]: With dead ends: 372 [2020-12-23 17:11:38,297 INFO L226 Difference]: Without dead ends: 372 [2020-12-23 17:11:38,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3557 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2039, Invalid=9951, Unknown=0, NotChecked=0, Total=11990 [2020-12-23 17:11:38,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-12-23 17:11:38,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 327. [2020-12-23 17:11:38,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-12-23 17:11:38,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 355 transitions. [2020-12-23 17:11:38,310 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 355 transitions. Word has length 274 [2020-12-23 17:11:38,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:11:38,311 INFO L481 AbstractCegarLoop]: Abstraction has 327 states and 355 transitions. [2020-12-23 17:11:38,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 17:11:38,311 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 355 transitions. [2020-12-23 17:11:38,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-12-23 17:11:38,313 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:11:38,313 INFO L422 BasicCegarLoop]: trace histogram [54, 53, 53, 53, 53, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2020-12-23 17:11:38,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:11:38,528 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:11:38,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:11:38,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1727796081, now seen corresponding path program 15 times [2020-12-23 17:11:38,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:11:38,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407596875] [2020-12-23 17:11:38,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:11:38,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:38,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7632 backedges. 2148 proven. 198 refuted. 0 times theorem prover too weak. 5286 trivial. 0 not checked. [2020-12-23 17:11:38,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407596875] [2020-12-23 17:11:38,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368639480] [2020-12-23 17:11:38,893 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:11:39,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 17:11:39,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:11:39,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 17:11:39,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:11:39,633 INFO L134 CoverageAnalysis]: Checked inductivity of 7632 backedges. 2148 proven. 198 refuted. 0 times theorem prover too weak. 5286 trivial. 0 not checked. [2020-12-23 17:11:39,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:11:39,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2020-12-23 17:11:39,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320458806] [2020-12-23 17:11:39,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 17:11:39,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:11:39,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 17:11:39,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2020-12-23 17:11:39,636 INFO L87 Difference]: Start difference. First operand 327 states and 355 transitions. Second operand 23 states. [2020-12-23 17:11:40,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:11:40,055 INFO L93 Difference]: Finished difference Result 341 states and 370 transitions. [2020-12-23 17:11:40,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 17:11:40,055 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 326 [2020-12-23 17:11:40,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:11:40,059 INFO L225 Difference]: With dead ends: 341 [2020-12-23 17:11:40,059 INFO L226 Difference]: Without dead ends: 341 [2020-12-23 17:11:40,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2020-12-23 17:11:40,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-12-23 17:11:40,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 332. [2020-12-23 17:11:40,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-12-23 17:11:40,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 361 transitions. [2020-12-23 17:11:40,080 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 361 transitions. Word has length 326 [2020-12-23 17:11:40,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:11:40,081 INFO L481 AbstractCegarLoop]: Abstraction has 332 states and 361 transitions. [2020-12-23 17:11:40,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 17:11:40,081 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 361 transitions. [2020-12-23 17:11:40,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-12-23 17:11:40,083 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:11:40,084 INFO L422 BasicCegarLoop]: trace histogram [55, 54, 54, 54, 54, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2020-12-23 17:11:40,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-23 17:11:40,291 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:11:40,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:11:40,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1065134024, now seen corresponding path program 16 times [2020-12-23 17:11:40,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:11:40,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014285645] [2020-12-23 17:11:40,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:11:40,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:40,967 INFO L134 CoverageAnalysis]: Checked inductivity of 7907 backedges. 3828 proven. 705 refuted. 0 times theorem prover too weak. 3374 trivial. 0 not checked. [2020-12-23 17:11:40,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014285645] [2020-12-23 17:11:40,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257075856] [2020-12-23 17:11:40,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:11:41,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 17:11:41,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:11:41,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 930 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 17:11:41,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:11:42,284 INFO L134 CoverageAnalysis]: Checked inductivity of 7907 backedges. 289 proven. 6974 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2020-12-23 17:11:42,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:11:42,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 43 [2020-12-23 17:11:42,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161347825] [2020-12-23 17:11:42,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 17:11:42,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:11:42,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 17:11:42,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=1486, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 17:11:42,288 INFO L87 Difference]: Start difference. First operand 332 states and 361 transitions. Second operand 43 states. [2020-12-23 17:11:46,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:11:46,595 INFO L93 Difference]: Finished difference Result 440 states and 476 transitions. [2020-12-23 17:11:46,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-12-23 17:11:46,596 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 331 [2020-12-23 17:11:46,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:11:46,599 INFO L225 Difference]: With dead ends: 440 [2020-12-23 17:11:46,599 INFO L226 Difference]: Without dead ends: 440 [2020-12-23 17:11:46,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4971 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2653, Invalid=13603, Unknown=0, NotChecked=0, Total=16256 [2020-12-23 17:11:46,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2020-12-23 17:11:46,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 389. [2020-12-23 17:11:46,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2020-12-23 17:11:46,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 425 transitions. [2020-12-23 17:11:46,615 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 425 transitions. Word has length 331 [2020-12-23 17:11:46,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:11:46,615 INFO L481 AbstractCegarLoop]: Abstraction has 389 states and 425 transitions. [2020-12-23 17:11:46,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 17:11:46,616 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 425 transitions. [2020-12-23 17:11:46,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2020-12-23 17:11:46,618 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:11:46,618 INFO L422 BasicCegarLoop]: trace histogram [65, 64, 64, 64, 64, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2020-12-23 17:11:46,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:11:46,835 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:11:46,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:11:46,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1903304557, now seen corresponding path program 17 times [2020-12-23 17:11:46,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:11:46,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138779124] [2020-12-23 17:11:46,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:11:46,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:47,380 INFO L134 CoverageAnalysis]: Checked inductivity of 11054 backedges. 2907 proven. 245 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2020-12-23 17:11:47,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138779124] [2020-12-23 17:11:47,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590593682] [2020-12-23 17:11:47,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:11:48,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2020-12-23 17:11:48,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:11:48,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 1080 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 17:11:48,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:11:48,593 INFO L134 CoverageAnalysis]: Checked inductivity of 11054 backedges. 2907 proven. 245 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2020-12-23 17:11:48,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:11:48,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2020-12-23 17:11:48,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437054138] [2020-12-23 17:11:48,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 17:11:48,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:11:48,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 17:11:48,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-12-23 17:11:48,596 INFO L87 Difference]: Start difference. First operand 389 states and 425 transitions. Second operand 14 states. [2020-12-23 17:11:49,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:11:49,229 INFO L93 Difference]: Finished difference Result 403 states and 440 transitions. [2020-12-23 17:11:49,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 17:11:49,230 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 388 [2020-12-23 17:11:49,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:11:49,233 INFO L225 Difference]: With dead ends: 403 [2020-12-23 17:11:49,233 INFO L226 Difference]: Without dead ends: 403 [2020-12-23 17:11:49,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 385 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-12-23 17:11:49,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-12-23 17:11:49,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 394. [2020-12-23 17:11:49,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-12-23 17:11:49,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 431 transitions. [2020-12-23 17:11:49,243 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 431 transitions. Word has length 388 [2020-12-23 17:11:49,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:11:49,244 INFO L481 AbstractCegarLoop]: Abstraction has 394 states and 431 transitions. [2020-12-23 17:11:49,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 17:11:49,244 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 431 transitions. [2020-12-23 17:11:49,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2020-12-23 17:11:49,247 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:11:49,248 INFO L422 BasicCegarLoop]: trace histogram [66, 65, 65, 65, 65, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2020-12-23 17:11:49,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 17:11:49,463 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:11:49,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:11:49,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1126263228, now seen corresponding path program 18 times [2020-12-23 17:11:49,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:11:49,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867727341] [2020-12-23 17:11:49,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:11:49,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:50,275 INFO L134 CoverageAnalysis]: Checked inductivity of 11385 backedges. 5241 proven. 858 refuted. 0 times theorem prover too weak. 5286 trivial. 0 not checked. [2020-12-23 17:11:50,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867727341] [2020-12-23 17:11:50,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424038996] [2020-12-23 17:11:50,276 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:11:50,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2020-12-23 17:11:50,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:11:50,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 17:11:50,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:11:51,700 INFO L134 CoverageAnalysis]: Checked inductivity of 11385 backedges. 3186 proven. 297 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2020-12-23 17:11:51,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:11:51,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 14] total 40 [2020-12-23 17:11:51,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192805363] [2020-12-23 17:11:51,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 17:11:51,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:11:51,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 17:11:51,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=1237, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 17:11:51,704 INFO L87 Difference]: Start difference. First operand 394 states and 431 transitions. Second operand 40 states. [2020-12-23 17:11:54,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:11:54,652 INFO L93 Difference]: Finished difference Result 475 states and 521 transitions. [2020-12-23 17:11:54,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-23 17:11:54,652 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 393 [2020-12-23 17:11:54,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:11:54,656 INFO L225 Difference]: With dead ends: 475 [2020-12-23 17:11:54,657 INFO L226 Difference]: Without dead ends: 475 [2020-12-23 17:11:54,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1911 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1882, Invalid=6308, Unknown=0, NotChecked=0, Total=8190 [2020-12-23 17:11:54,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2020-12-23 17:11:54,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 461. [2020-12-23 17:11:54,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 461 states. [2020-12-23 17:11:54,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 507 transitions. [2020-12-23 17:11:54,668 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 507 transitions. Word has length 393 [2020-12-23 17:11:54,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:11:54,668 INFO L481 AbstractCegarLoop]: Abstraction has 461 states and 507 transitions. [2020-12-23 17:11:54,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 17:11:54,668 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 507 transitions. [2020-12-23 17:11:54,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-12-23 17:11:54,672 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:11:54,672 INFO L422 BasicCegarLoop]: trace histogram [78, 77, 77, 77, 77, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1] [2020-12-23 17:11:54,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 17:11:54,886 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:11:54,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:11:54,887 INFO L82 PathProgramCache]: Analyzing trace with hash 346445623, now seen corresponding path program 19 times [2020-12-23 17:11:54,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:11:54,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435431504] [2020-12-23 17:11:54,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:11:54,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:55,736 INFO L134 CoverageAnalysis]: Checked inductivity of 15889 backedges. 6961 proven. 1026 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2020-12-23 17:11:55,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435431504] [2020-12-23 17:11:55,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180262645] [2020-12-23 17:11:55,738 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:11:55,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:55,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 17:11:56,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:11:57,374 INFO L134 CoverageAnalysis]: Checked inductivity of 15889 backedges. 419 proven. 14305 refuted. 0 times theorem prover too weak. 1165 trivial. 0 not checked. [2020-12-23 17:11:57,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:11:57,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26] total 51 [2020-12-23 17:11:57,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665964863] [2020-12-23 17:11:57,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-23 17:11:57,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:11:57,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-23 17:11:57,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=2107, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 17:11:57,377 INFO L87 Difference]: Start difference. First operand 461 states and 507 transitions. Second operand 51 states. [2020-12-23 17:12:04,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:12:04,209 INFO L93 Difference]: Finished difference Result 591 states and 646 transitions. [2020-12-23 17:12:04,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2020-12-23 17:12:04,210 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 460 [2020-12-23 17:12:04,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:12:04,214 INFO L225 Difference]: With dead ends: 591 [2020-12-23 17:12:04,214 INFO L226 Difference]: Without dead ends: 591 [2020-12-23 17:12:04,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 604 GetRequests, 439 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8891 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=4197, Invalid=23525, Unknown=0, NotChecked=0, Total=27722 [2020-12-23 17:12:04,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2020-12-23 17:12:04,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 528. [2020-12-23 17:12:04,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 528 states. [2020-12-23 17:12:04,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 583 transitions. [2020-12-23 17:12:04,229 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 583 transitions. Word has length 460 [2020-12-23 17:12:04,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:12:04,229 INFO L481 AbstractCegarLoop]: Abstraction has 528 states and 583 transitions. [2020-12-23 17:12:04,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-23 17:12:04,229 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 583 transitions. [2020-12-23 17:12:04,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2020-12-23 17:12:04,233 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:12:04,234 INFO L422 BasicCegarLoop]: trace histogram [90, 89, 89, 89, 89, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1] [2020-12-23 17:12:04,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 17:12:04,448 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:12:04,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:12:04,449 INFO L82 PathProgramCache]: Analyzing trace with hash -2060638876, now seen corresponding path program 20 times [2020-12-23 17:12:04,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:12:04,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673305929] [2020-12-23 17:12:04,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:12:04,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:12:05,220 INFO L134 CoverageAnalysis]: Checked inductivity of 21144 backedges. 4917 proven. 354 refuted. 0 times theorem prover too weak. 15873 trivial. 0 not checked. [2020-12-23 17:12:05,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673305929] [2020-12-23 17:12:05,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130691495] [2020-12-23 17:12:05,220 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:12:05,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 17:12:05,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:12:05,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 1440 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 17:12:05,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:12:06,062 INFO L134 CoverageAnalysis]: Checked inductivity of 21144 backedges. 4917 proven. 354 refuted. 0 times theorem prover too weak. 15873 trivial. 0 not checked. [2020-12-23 17:12:06,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:12:06,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-12-23 17:12:06,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013094658] [2020-12-23 17:12:06,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 17:12:06,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:12:06,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 17:12:06,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-12-23 17:12:06,065 INFO L87 Difference]: Start difference. First operand 528 states and 583 transitions. Second operand 15 states. [2020-12-23 17:12:06,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:12:06,956 INFO L93 Difference]: Finished difference Result 542 states and 598 transitions. [2020-12-23 17:12:06,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 17:12:06,957 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 527 [2020-12-23 17:12:06,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:12:06,960 INFO L225 Difference]: With dead ends: 542 [2020-12-23 17:12:06,961 INFO L226 Difference]: Without dead ends: 542 [2020-12-23 17:12:06,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 540 GetRequests, 526 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-12-23 17:12:06,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2020-12-23 17:12:06,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 533. [2020-12-23 17:12:06,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 533 states. [2020-12-23 17:12:06,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 589 transitions. [2020-12-23 17:12:06,974 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 589 transitions. Word has length 527 [2020-12-23 17:12:06,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:12:06,975 INFO L481 AbstractCegarLoop]: Abstraction has 533 states and 589 transitions. [2020-12-23 17:12:06,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 17:12:06,975 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 589 transitions. [2020-12-23 17:12:06,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 533 [2020-12-23 17:12:06,980 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:12:06,980 INFO L422 BasicCegarLoop]: trace histogram [91, 90, 90, 90, 90, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1] [2020-12-23 17:12:07,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 17:12:07,195 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:12:07,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:12:07,196 INFO L82 PathProgramCache]: Analyzing trace with hash 2144250899, now seen corresponding path program 21 times [2020-12-23 17:12:07,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:12:07,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724383960] [2020-12-23 17:12:07,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:12:07,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:12:08,390 INFO L134 CoverageAnalysis]: Checked inductivity of 21602 backedges. 9018 proven. 1209 refuted. 0 times theorem prover too weak. 11375 trivial. 0 not checked. [2020-12-23 17:12:08,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724383960] [2020-12-23 17:12:08,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878623417] [2020-12-23 17:12:08,391 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:12:08,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-12-23 17:12:08,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:12:08,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 17:12:08,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:12:09,757 INFO L134 CoverageAnalysis]: Checked inductivity of 21602 backedges. 5313 proven. 416 refuted. 0 times theorem prover too weak. 15873 trivial. 0 not checked. [2020-12-23 17:12:09,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:12:09,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 16] total 46 [2020-12-23 17:12:09,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892025096] [2020-12-23 17:12:09,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-23 17:12:09,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:12:09,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-23 17:12:09,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=1639, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 17:12:09,760 INFO L87 Difference]: Start difference. First operand 533 states and 589 transitions. Second operand 46 states. [2020-12-23 17:12:13,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:12:13,822 INFO L93 Difference]: Finished difference Result 624 states and 691 transitions. [2020-12-23 17:12:13,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-12-23 17:12:13,824 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 532 [2020-12-23 17:12:13,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:12:13,828 INFO L225 Difference]: With dead ends: 624 [2020-12-23 17:12:13,828 INFO L226 Difference]: Without dead ends: 624 [2020-12-23 17:12:13,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2712 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2590, Invalid=8752, Unknown=0, NotChecked=0, Total=11342 [2020-12-23 17:12:13,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2020-12-23 17:12:13,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 610. [2020-12-23 17:12:13,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 610 states. [2020-12-23 17:12:13,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 677 transitions. [2020-12-23 17:12:13,843 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 677 transitions. Word has length 532 [2020-12-23 17:12:13,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:12:13,844 INFO L481 AbstractCegarLoop]: Abstraction has 610 states and 677 transitions. [2020-12-23 17:12:13,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-23 17:12:13,844 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 677 transitions. [2020-12-23 17:12:13,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 610 [2020-12-23 17:12:13,850 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:12:13,850 INFO L422 BasicCegarLoop]: trace histogram [105, 104, 104, 104, 104, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1] [2020-12-23 17:12:14,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 17:12:14,065 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:12:14,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:12:14,066 INFO L82 PathProgramCache]: Analyzing trace with hash -141341848, now seen corresponding path program 22 times [2020-12-23 17:12:14,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:12:14,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665886148] [2020-12-23 17:12:14,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:12:14,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:12:15,307 INFO L134 CoverageAnalysis]: Checked inductivity of 28722 backedges. 11442 proven. 1407 refuted. 0 times theorem prover too weak. 15873 trivial. 0 not checked. [2020-12-23 17:12:15,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665886148] [2020-12-23 17:12:15,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855871549] [2020-12-23 17:12:15,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:12:17,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 17:12:17,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:12:17,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 1650 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 17:12:17,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:12:19,593 INFO L134 CoverageAnalysis]: Checked inductivity of 28722 backedges. 573 proven. 26239 refuted. 0 times theorem prover too weak. 1910 trivial. 0 not checked. [2020-12-23 17:12:19,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:12:19,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 30] total 59 [2020-12-23 17:12:19,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052308988] [2020-12-23 17:12:19,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-23 17:12:19,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:12:19,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-23 17:12:19,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=586, Invalid=2836, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 17:12:19,596 INFO L87 Difference]: Start difference. First operand 610 states and 677 transitions. Second operand 59 states. [2020-12-23 17:12:29,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:12:29,614 INFO L93 Difference]: Finished difference Result 762 states and 840 transitions. [2020-12-23 17:12:29,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2020-12-23 17:12:29,615 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 609 [2020-12-23 17:12:29,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:12:29,620 INFO L225 Difference]: With dead ends: 762 [2020-12-23 17:12:29,621 INFO L226 Difference]: Without dead ends: 762 [2020-12-23 17:12:29,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 792 GetRequests, 584 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14602 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=6209, Invalid=37681, Unknown=0, NotChecked=0, Total=43890 [2020-12-23 17:12:29,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2020-12-23 17:12:29,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 687. [2020-12-23 17:12:29,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 687 states. [2020-12-23 17:12:29,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 765 transitions. [2020-12-23 17:12:29,641 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 765 transitions. Word has length 609 [2020-12-23 17:12:29,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:12:29,642 INFO L481 AbstractCegarLoop]: Abstraction has 687 states and 765 transitions. [2020-12-23 17:12:29,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-23 17:12:29,642 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 765 transitions. [2020-12-23 17:12:29,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 687 [2020-12-23 17:12:29,648 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:12:29,649 INFO L422 BasicCegarLoop]: trace histogram [119, 118, 118, 118, 118, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1] [2020-12-23 17:12:29,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:12:29,865 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:12:29,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:12:29,866 INFO L82 PathProgramCache]: Analyzing trace with hash 2104567347, now seen corresponding path program 23 times [2020-12-23 17:12:29,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:12:29,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983849879] [2020-12-23 17:12:29,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:12:30,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:12:30,738 INFO L134 CoverageAnalysis]: Checked inductivity of 36857 backedges. 7683 proven. 483 refuted. 0 times theorem prover too weak. 28691 trivial. 0 not checked. [2020-12-23 17:12:30,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983849879] [2020-12-23 17:12:30,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397202213] [2020-12-23 17:12:30,739 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:12:34,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2020-12-23 17:12:34,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:12:34,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 1848 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 17:12:34,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:12:35,339 INFO L134 CoverageAnalysis]: Checked inductivity of 36857 backedges. 7683 proven. 483 refuted. 0 times theorem prover too weak. 28691 trivial. 0 not checked. [2020-12-23 17:12:35,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:12:35,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 17 [2020-12-23 17:12:35,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42304790] [2020-12-23 17:12:35,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 17:12:35,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:12:35,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 17:12:35,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-12-23 17:12:35,342 INFO L87 Difference]: Start difference. First operand 687 states and 765 transitions. Second operand 18 states. [2020-12-23 17:12:36,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:12:36,788 INFO L93 Difference]: Finished difference Result 701 states and 780 transitions. [2020-12-23 17:12:36,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 17:12:36,789 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 686 [2020-12-23 17:12:36,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:12:36,794 INFO L225 Difference]: With dead ends: 701 [2020-12-23 17:12:36,794 INFO L226 Difference]: Without dead ends: 701 [2020-12-23 17:12:36,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 701 GetRequests, 683 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-12-23 17:12:36,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2020-12-23 17:12:36,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 692. [2020-12-23 17:12:36,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 692 states. [2020-12-23 17:12:36,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 771 transitions. [2020-12-23 17:12:36,807 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 771 transitions. Word has length 686 [2020-12-23 17:12:36,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:12:36,808 INFO L481 AbstractCegarLoop]: Abstraction has 692 states and 771 transitions. [2020-12-23 17:12:36,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 17:12:36,808 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 771 transitions. [2020-12-23 17:12:36,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 692 [2020-12-23 17:12:36,814 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:12:36,814 INFO L422 BasicCegarLoop]: trace histogram [120, 119, 119, 119, 119, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1] [2020-12-23 17:12:37,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 17:12:37,028 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:12:37,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:12:37,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1933956260, now seen corresponding path program 24 times [2020-12-23 17:12:37,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:12:37,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741686858] [2020-12-23 17:12:37,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:12:37,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:12:38,506 INFO L134 CoverageAnalysis]: Checked inductivity of 37462 backedges. 14263 proven. 1620 refuted. 0 times theorem prover too weak. 21579 trivial. 0 not checked. [2020-12-23 17:12:38,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741686858] [2020-12-23 17:12:38,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090369737] [2020-12-23 17:12:38,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:12:39,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-23 17:12:39,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:12:39,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 1026 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 17:12:39,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:12:40,921 INFO L134 CoverageAnalysis]: Checked inductivity of 37462 backedges. 8216 proven. 555 refuted. 0 times theorem prover too weak. 28691 trivial. 0 not checked. [2020-12-23 17:12:40,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:12:40,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 18] total 52 [2020-12-23 17:12:40,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994203137] [2020-12-23 17:12:40,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-23 17:12:40,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:12:40,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-23 17:12:40,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=555, Invalid=2097, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 17:12:40,925 INFO L87 Difference]: Start difference. First operand 692 states and 771 transitions. Second operand 52 states. [2020-12-23 17:12:46,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:12:46,598 INFO L93 Difference]: Finished difference Result 793 states and 885 transitions. [2020-12-23 17:12:46,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-12-23 17:12:46,599 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 691 [2020-12-23 17:12:46,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:12:46,603 INFO L225 Difference]: With dead ends: 793 [2020-12-23 17:12:46,603 INFO L226 Difference]: Without dead ends: 793 [2020-12-23 17:12:46,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 796 GetRequests, 675 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3653 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=3410, Invalid=11596, Unknown=0, NotChecked=0, Total=15006 [2020-12-23 17:12:46,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2020-12-23 17:12:46,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 779. [2020-12-23 17:12:46,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 779 states. [2020-12-23 17:12:46,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 871 transitions. [2020-12-23 17:12:46,618 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 871 transitions. Word has length 691 [2020-12-23 17:12:46,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:12:46,619 INFO L481 AbstractCegarLoop]: Abstraction has 779 states and 871 transitions. [2020-12-23 17:12:46,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-23 17:12:46,619 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 871 transitions. [2020-12-23 17:12:46,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 779 [2020-12-23 17:12:46,626 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:12:46,626 INFO L422 BasicCegarLoop]: trace histogram [136, 135, 135, 135, 135, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1] [2020-12-23 17:12:46,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 17:12:46,840 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:12:46,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:12:46,841 INFO L82 PathProgramCache]: Analyzing trace with hash -2035927017, now seen corresponding path program 25 times [2020-12-23 17:12:46,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:12:46,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899486107] [2020-12-23 17:12:46,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:12:47,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:12:48,616 INFO L134 CoverageAnalysis]: Checked inductivity of 48050 backedges. 17511 proven. 1848 refuted. 0 times theorem prover too weak. 28691 trivial. 0 not checked. [2020-12-23 17:12:48,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899486107] [2020-12-23 17:12:48,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012696975] [2020-12-23 17:12:48,617 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:12:49,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:12:49,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 2082 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 17:12:49,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:12:51,841 INFO L134 CoverageAnalysis]: Checked inductivity of 48050 backedges. 751 proven. 44380 refuted. 0 times theorem prover too weak. 2919 trivial. 0 not checked. [2020-12-23 17:12:51,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:12:51,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 34] total 67 [2020-12-23 17:12:51,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195586584] [2020-12-23 17:12:51,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-12-23 17:12:51,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:12:51,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-12-23 17:12:51,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=3673, Unknown=0, NotChecked=0, Total=4422 [2020-12-23 17:12:51,843 INFO L87 Difference]: Start difference. First operand 779 states and 871 transitions. Second operand 67 states. [2020-12-23 17:13:06,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:13:06,533 INFO L93 Difference]: Finished difference Result 953 states and 1058 transitions. [2020-12-23 17:13:06,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2020-12-23 17:13:06,534 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 778 [2020-12-23 17:13:06,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:13:06,540 INFO L225 Difference]: With dead ends: 953 [2020-12-23 17:13:06,540 INFO L226 Difference]: Without dead ends: 953 [2020-12-23 17:13:06,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1004 GetRequests, 749 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22548 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=8745, Invalid=57047, Unknown=0, NotChecked=0, Total=65792 [2020-12-23 17:13:06,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2020-12-23 17:13:06,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 866. [2020-12-23 17:13:06,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 866 states. [2020-12-23 17:13:06,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 971 transitions. [2020-12-23 17:13:06,564 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 971 transitions. Word has length 778 [2020-12-23 17:13:06,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:13:06,565 INFO L481 AbstractCegarLoop]: Abstraction has 866 states and 971 transitions. [2020-12-23 17:13:06,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-12-23 17:13:06,566 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 971 transitions. [2020-12-23 17:13:06,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 866 [2020-12-23 17:13:06,576 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:13:06,576 INFO L422 BasicCegarLoop]: trace histogram [152, 151, 151, 151, 151, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1] [2020-12-23 17:13:06,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:13:06,789 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:13:06,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:13:06,790 INFO L82 PathProgramCache]: Analyzing trace with hash 269073220, now seen corresponding path program 26 times [2020-12-23 17:13:06,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:13:06,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291318536] [2020-12-23 17:13:06,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:13:07,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:13:08,267 INFO L134 CoverageAnalysis]: Checked inductivity of 59957 backedges. 11325 proven. 632 refuted. 0 times theorem prover too weak. 48000 trivial. 0 not checked. [2020-12-23 17:13:08,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291318536] [2020-12-23 17:13:08,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264428576] [2020-12-23 17:13:08,268 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:13:08,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 17:13:08,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:13:08,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 2304 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 17:13:08,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:13:09,904 INFO L134 CoverageAnalysis]: Checked inductivity of 59957 backedges. 11325 proven. 632 refuted. 0 times theorem prover too weak. 48000 trivial. 0 not checked. [2020-12-23 17:13:09,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:13:09,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-12-23 17:13:09,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623098338] [2020-12-23 17:13:09,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 17:13:09,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:13:09,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 17:13:09,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-12-23 17:13:09,907 INFO L87 Difference]: Start difference. First operand 866 states and 971 transitions. Second operand 19 states. [2020-12-23 17:13:11,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:13:11,832 INFO L93 Difference]: Finished difference Result 880 states and 986 transitions. [2020-12-23 17:13:11,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 17:13:11,834 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 865 [2020-12-23 17:13:11,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:13:11,839 INFO L225 Difference]: With dead ends: 880 [2020-12-23 17:13:11,839 INFO L226 Difference]: Without dead ends: 880 [2020-12-23 17:13:11,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 882 GetRequests, 864 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-12-23 17:13:11,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2020-12-23 17:13:11,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 871. [2020-12-23 17:13:11,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 871 states. [2020-12-23 17:13:11,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 977 transitions. [2020-12-23 17:13:11,855 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 977 transitions. Word has length 865 [2020-12-23 17:13:11,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:13:11,856 INFO L481 AbstractCegarLoop]: Abstraction has 871 states and 977 transitions. [2020-12-23 17:13:11,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 17:13:11,856 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 977 transitions. [2020-12-23 17:13:11,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 871 [2020-12-23 17:13:11,864 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:13:11,865 INFO L422 BasicCegarLoop]: trace histogram [153, 152, 152, 152, 152, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1] [2020-12-23 17:13:12,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-23 17:13:12,079 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:13:12,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:13:12,080 INFO L82 PathProgramCache]: Analyzing trace with hash 516211251, now seen corresponding path program 27 times [2020-12-23 17:13:12,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:13:12,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372802410] [2020-12-23 17:13:12,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:13:12,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:13:14,365 INFO L134 CoverageAnalysis]: Checked inductivity of 60729 backedges. 21216 proven. 2091 refuted. 0 times theorem prover too weak. 37422 trivial. 0 not checked. [2020-12-23 17:13:14,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372802410] [2020-12-23 17:13:14,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590810140] [2020-12-23 17:13:14,366 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:13:14,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-12-23 17:13:14,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:13:14,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 17:13:14,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:13:16,892 INFO L134 CoverageAnalysis]: Checked inductivity of 60729 backedges. 12015 proven. 714 refuted. 0 times theorem prover too weak. 48000 trivial. 0 not checked. [2020-12-23 17:13:16,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:13:16,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 20] total 58 [2020-12-23 17:13:16,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107923243] [2020-12-23 17:13:16,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-23 17:13:16,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:13:16,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-23 17:13:16,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=695, Invalid=2611, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 17:13:16,895 INFO L87 Difference]: Start difference. First operand 871 states and 977 transitions. Second operand 58 states. [2020-12-23 17:13:24,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:13:24,361 INFO L93 Difference]: Finished difference Result 982 states and 1103 transitions. [2020-12-23 17:13:24,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-12-23 17:13:24,362 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 870 [2020-12-23 17:13:24,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:13:24,367 INFO L225 Difference]: With dead ends: 982 [2020-12-23 17:13:24,367 INFO L226 Difference]: Without dead ends: 982 [2020-12-23 17:13:24,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 989 GetRequests, 852 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4734 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=4342, Invalid=14840, Unknown=0, NotChecked=0, Total=19182 [2020-12-23 17:13:24,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2020-12-23 17:13:24,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 968. [2020-12-23 17:13:24,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 968 states. [2020-12-23 17:13:24,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1089 transitions. [2020-12-23 17:13:24,387 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1089 transitions. Word has length 870 [2020-12-23 17:13:24,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:13:24,389 INFO L481 AbstractCegarLoop]: Abstraction has 968 states and 1089 transitions. [2020-12-23 17:13:24,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-23 17:13:24,389 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1089 transitions. [2020-12-23 17:13:24,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 968 [2020-12-23 17:13:24,402 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:13:24,402 INFO L422 BasicCegarLoop]: trace histogram [171, 170, 170, 170, 170, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1] [2020-12-23 17:13:24,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:13:24,616 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:13:24,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:13:24,617 INFO L82 PathProgramCache]: Analyzing trace with hash 2108342792, now seen corresponding path program 28 times [2020-12-23 17:13:24,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:13:24,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776344370] [2020-12-23 17:13:24,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:13:24,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:13:27,136 INFO L134 CoverageAnalysis]: Checked inductivity of 75757 backedges. 25408 proven. 2349 refuted. 0 times theorem prover too weak. 48000 trivial. 0 not checked. [2020-12-23 17:13:27,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776344370] [2020-12-23 17:13:27,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924317954] [2020-12-23 17:13:27,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:13:30,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 17:13:30,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:13:30,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 2562 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 17:13:30,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:13:33,989 INFO L134 CoverageAnalysis]: Checked inductivity of 75757 backedges. 953 proven. 70572 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2020-12-23 17:13:33,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:13:33,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 38] total 75 [2020-12-23 17:13:33,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129155861] [2020-12-23 17:13:33,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-12-23 17:13:33,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:13:33,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-12-23 17:13:33,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=932, Invalid=4618, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 17:13:33,993 INFO L87 Difference]: Start difference. First operand 968 states and 1089 transitions. Second operand 75 states. [2020-12-23 17:13:54,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:13:54,057 INFO L93 Difference]: Finished difference Result 1164 states and 1300 transitions. [2020-12-23 17:13:54,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2020-12-23 17:13:54,058 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 967 [2020-12-23 17:13:54,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:13:54,063 INFO L225 Difference]: With dead ends: 1164 [2020-12-23 17:13:54,064 INFO L226 Difference]: Without dead ends: 1164 [2020-12-23 17:13:54,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1240 GetRequests, 934 SyntacticMatches, 0 SemanticMatches, 306 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33221 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=11861, Invalid=82695, Unknown=0, NotChecked=0, Total=94556 [2020-12-23 17:13:54,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2020-12-23 17:13:54,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1065. [2020-12-23 17:13:54,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1065 states. [2020-12-23 17:13:54,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1201 transitions. [2020-12-23 17:13:54,084 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1201 transitions. Word has length 967 [2020-12-23 17:13:54,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:13:54,085 INFO L481 AbstractCegarLoop]: Abstraction has 1065 states and 1201 transitions. [2020-12-23 17:13:54,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-12-23 17:13:54,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1201 transitions. [2020-12-23 17:13:54,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1065 [2020-12-23 17:13:54,097 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:13:54,098 INFO L422 BasicCegarLoop]: trace histogram [189, 188, 188, 188, 188, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1] [2020-12-23 17:13:54,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-12-23 17:13:54,314 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:13:54,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:13:54,315 INFO L82 PathProgramCache]: Analyzing trace with hash -829228845, now seen corresponding path program 29 times [2020-12-23 17:13:54,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:13:54,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128063836] [2020-12-23 17:13:54,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:13:54,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:13:56,139 INFO L134 CoverageAnalysis]: Checked inductivity of 92448 backedges. 15963 proven. 801 refuted. 0 times theorem prover too weak. 75684 trivial. 0 not checked. [2020-12-23 17:13:56,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128063836] [2020-12-23 17:13:56,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690475637] [2020-12-23 17:13:56,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:14:08,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 56 check-sat command(s) [2020-12-23 17:14:08,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:14:08,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 2808 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 17:14:08,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:14:10,579 INFO L134 CoverageAnalysis]: Checked inductivity of 92448 backedges. 15963 proven. 801 refuted. 0 times theorem prover too weak. 75684 trivial. 0 not checked. [2020-12-23 17:14:10,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:14:10,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 21 [2020-12-23 17:14:10,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552567056] [2020-12-23 17:14:10,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 17:14:10,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:14:10,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 17:14:10,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2020-12-23 17:14:10,582 INFO L87 Difference]: Start difference. First operand 1065 states and 1201 transitions. Second operand 22 states. [2020-12-23 17:14:13,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:14:13,678 INFO L93 Difference]: Finished difference Result 1079 states and 1216 transitions. [2020-12-23 17:14:13,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 17:14:13,679 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1064 [2020-12-23 17:14:13,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:14:13,685 INFO L225 Difference]: With dead ends: 1079 [2020-12-23 17:14:13,685 INFO L226 Difference]: Without dead ends: 1079 [2020-12-23 17:14:13,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1083 GetRequests, 1061 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2020-12-23 17:14:13,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2020-12-23 17:14:13,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 1070. [2020-12-23 17:14:13,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1070 states. [2020-12-23 17:14:13,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1207 transitions. [2020-12-23 17:14:13,707 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1207 transitions. Word has length 1064 [2020-12-23 17:14:13,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:14:13,708 INFO L481 AbstractCegarLoop]: Abstraction has 1070 states and 1207 transitions. [2020-12-23 17:14:13,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 17:14:13,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1207 transitions. [2020-12-23 17:14:13,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1070 [2020-12-23 17:14:13,722 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:14:13,723 INFO L422 BasicCegarLoop]: trace histogram [190, 189, 189, 189, 189, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1] [2020-12-23 17:14:13,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-23 17:14:13,937 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:14:13,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:14:13,938 INFO L82 PathProgramCache]: Analyzing trace with hash 427730436, now seen corresponding path program 30 times [2020-12-23 17:14:13,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:14:13,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564272993] [2020-12-23 17:14:13,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:14:14,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:14:17,176 INFO L134 CoverageAnalysis]: Checked inductivity of 93407 backedges. 30117 proven. 2622 refuted. 0 times theorem prover too weak. 60668 trivial. 0 not checked. [2020-12-23 17:14:17,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564272993] [2020-12-23 17:14:17,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65458580] [2020-12-23 17:14:17,177 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:14:20,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2020-12-23 17:14:20,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:14:20,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 1866 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 17:14:20,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:14:23,369 INFO L134 CoverageAnalysis]: Checked inductivity of 93407 backedges. 16830 proven. 893 refuted. 0 times theorem prover too weak. 75684 trivial. 0 not checked. [2020-12-23 17:14:23,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:14:23,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 22] total 64 [2020-12-23 17:14:23,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077228624] [2020-12-23 17:14:23,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-23 17:14:23,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:14:23,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-23 17:14:23,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=851, Invalid=3181, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 17:14:23,372 INFO L87 Difference]: Start difference. First operand 1070 states and 1207 transitions. Second operand 64 states. [2020-12-23 17:14:31,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:14:31,801 INFO L93 Difference]: Finished difference Result 1191 states and 1345 transitions. [2020-12-23 17:14:31,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-12-23 17:14:31,802 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 1069 [2020-12-23 17:14:31,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:14:31,807 INFO L225 Difference]: With dead ends: 1191 [2020-12-23 17:14:31,807 INFO L226 Difference]: Without dead ends: 1191 [2020-12-23 17:14:31,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1202 GetRequests, 1049 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5955 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=5386, Invalid=18484, Unknown=0, NotChecked=0, Total=23870 [2020-12-23 17:14:31,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2020-12-23 17:14:31,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1177. [2020-12-23 17:14:31,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1177 states. [2020-12-23 17:14:31,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 1331 transitions. [2020-12-23 17:14:31,820 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 1331 transitions. Word has length 1069 [2020-12-23 17:14:31,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:14:31,820 INFO L481 AbstractCegarLoop]: Abstraction has 1177 states and 1331 transitions. [2020-12-23 17:14:31,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-23 17:14:31,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 1331 transitions. [2020-12-23 17:14:31,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1177 [2020-12-23 17:14:31,833 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:14:31,833 INFO L422 BasicCegarLoop]: trace histogram [210, 209, 209, 209, 209, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1] [2020-12-23 17:14:32,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-23 17:14:32,049 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:14:32,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:14:32,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1341285879, now seen corresponding path program 31 times [2020-12-23 17:14:32,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:14:32,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452473197] [2020-12-23 17:14:32,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:14:32,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:14:35,038 INFO L134 CoverageAnalysis]: Checked inductivity of 113967 backedges. 35373 proven. 2910 refuted. 0 times theorem prover too weak. 75684 trivial. 0 not checked. [2020-12-23 17:14:35,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452473197] [2020-12-23 17:14:35,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943374265] [2020-12-23 17:14:35,039 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:14:35,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:14:35,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 3090 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 17:14:35,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:14:40,252 INFO L134 CoverageAnalysis]: Checked inductivity of 113967 backedges. 1179 proven. 106899 refuted. 0 times theorem prover too weak. 5889 trivial. 0 not checked. [2020-12-23 17:14:40,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:14:40,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 42] total 83 [2020-12-23 17:14:40,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915900730] [2020-12-23 17:14:40,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-12-23 17:14:40,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:14:40,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-12-23 17:14:40,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1135, Invalid=5671, Unknown=0, NotChecked=0, Total=6806 [2020-12-23 17:14:40,254 INFO L87 Difference]: Start difference. First operand 1177 states and 1331 transitions. Second operand 83 states.