/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/ArraysOfVariableLength6.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 17:10:45,205 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 17:10:45,209 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 17:10:45,266 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 17:10:45,267 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 17:10:45,271 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 17:10:45,275 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 17:10:45,280 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 17:10:45,284 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 17:10:45,291 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 17:10:45,293 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 17:10:45,294 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 17:10:45,295 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 17:10:45,299 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 17:10:45,302 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 17:10:45,303 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 17:10:45,305 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 17:10:45,309 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 17:10:45,323 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 17:10:45,325 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 17:10:45,327 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 17:10:45,328 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 17:10:45,330 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 17:10:45,331 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 17:10:45,334 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 17:10:45,338 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 17:10:45,339 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 17:10:45,340 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 17:10:45,341 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 17:10:45,342 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 17:10:45,342 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 17:10:45,343 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 17:10:45,343 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 17:10:45,344 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 17:10:45,345 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 17:10:45,346 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 17:10:45,349 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 17:10:45,375 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 17:10:45,375 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 17:10:45,377 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 17:10:45,377 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 17:10:45,378 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 17:10:45,378 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 17:10:45,378 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-23 17:10:45,378 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 17:10:45,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 17:10:45,379 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-23 17:10:45,379 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-23 17:10:45,379 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-23 17:10:45,379 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 17:10:45,380 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-23 17:10:45,380 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 17:10:45,380 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 17:10:45,380 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 17:10:45,381 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 17:10:45,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 17:10:45,381 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 17:10:45,381 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 17:10:45,381 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 17:10:45,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 17:10:45,383 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 17:10:45,383 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 17:10:45,783 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 17:10:45,816 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 17:10:45,819 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 17:10:45,821 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 17:10:45,822 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 17:10:45,823 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c [2020-12-23 17:10:45,922 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/78979232c/f76ccd3c57ae49d79e666758534c7d3d/FLAG61eb2a425 [2020-12-23 17:10:46,533 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 17:10:46,533 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c [2020-12-23 17:10:46,541 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/78979232c/f76ccd3c57ae49d79e666758534c7d3d/FLAG61eb2a425 [2020-12-23 17:10:46,893 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/78979232c/f76ccd3c57ae49d79e666758534c7d3d [2020-12-23 17:10:46,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 17:10:46,899 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 17:10:46,906 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 17:10:46,906 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 17:10:46,912 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 17:10:46,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 05:10:46" (1/1) ... [2020-12-23 17:10:46,915 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cdca00d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:10:46, skipping insertion in model container [2020-12-23 17:10:46,915 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 05:10:46" (1/1) ... [2020-12-23 17:10:46,924 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 17:10:46,940 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: VariableLHS[~c~0,] 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 17:10:47,108 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 17:10:47,123 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: lhs: VariableLHS[~c~0,] 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 17:10:47,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 17:10:47,175 INFO L208 MainTranslator]: Completed translation [2020-12-23 17:10:47,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:10:47 WrapperNode [2020-12-23 17:10:47,176 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 17:10:47,178 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 17:10:47,178 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 17:10:47,178 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 17:10:47,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:10:47" (1/1) ... [2020-12-23 17:10:47,203 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:10:47" (1/1) ... [2020-12-23 17:10:47,239 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 17:10:47,240 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 17:10:47,240 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 17:10:47,241 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 17:10:47,251 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:10:47" (1/1) ... [2020-12-23 17:10:47,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:10:47" (1/1) ... [2020-12-23 17:10:47,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:10:47" (1/1) ... [2020-12-23 17:10:47,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:10:47" (1/1) ... [2020-12-23 17:10:47,260 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:10:47" (1/1) ... [2020-12-23 17:10:47,265 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:10:47" (1/1) ... [2020-12-23 17:10:47,267 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:10:47" (1/1) ... [2020-12-23 17:10:47,269 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 17:10:47,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 17:10:47,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 17:10:47,271 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 17:10:47,272 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:10:47" (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 17:10:47,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 17:10:47,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 17:10:47,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 17:10:47,397 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 17:10:47,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 17:10:47,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 17:10:47,764 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 17:10:47,764 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-23 17:10:47,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 05:10:47 BoogieIcfgContainer [2020-12-23 17:10:47,766 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 17:10:47,768 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 17:10:47,769 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 17:10:47,773 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 17:10:47,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 05:10:46" (1/3) ... [2020-12-23 17:10:47,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f1a9ae6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 05:10:47, skipping insertion in model container [2020-12-23 17:10:47,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:10:47" (2/3) ... [2020-12-23 17:10:47,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f1a9ae6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 05:10:47, skipping insertion in model container [2020-12-23 17:10:47,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 05:10:47" (3/3) ... [2020-12-23 17:10:47,779 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength6.c [2020-12-23 17:10:47,795 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 17:10:47,807 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-12-23 17:10:47,849 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-12-23 17:10:47,890 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 17:10:47,891 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-23 17:10:47,891 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 17:10:47,891 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 17:10:47,892 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 17:10:47,892 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 17:10:47,894 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 17:10:47,894 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 17:10:47,918 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-12-23 17:10:47,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-23 17:10:47,929 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:47,930 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-23 17:10:47,930 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 17:10:47,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:47,939 INFO L82 PathProgramCache]: Analyzing trace with hash 28698920, now seen corresponding path program 1 times [2020-12-23 17:10:47,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:47,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882517391] [2020-12-23 17:10:47,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:48,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:48,239 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 17:10:48,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882517391] [2020-12-23 17:10:48,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:10:48,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 17:10:48,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721025268] [2020-12-23 17:10:48,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 17:10:48,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:48,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 17:10:48,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 17:10:48,272 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2020-12-23 17:10:48,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:48,329 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2020-12-23 17:10:48,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 17:10:48,331 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-23 17:10:48,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:48,341 INFO L225 Difference]: With dead ends: 59 [2020-12-23 17:10:48,342 INFO L226 Difference]: Without dead ends: 55 [2020-12-23 17:10:48,344 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 17:10:48,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-23 17:10:48,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 31. [2020-12-23 17:10:48,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 17:10:48,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-12-23 17:10:48,384 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 5 [2020-12-23 17:10:48,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:48,385 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-12-23 17:10:48,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 17:10:48,385 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-12-23 17:10:48,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 17:10:48,385 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:48,386 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 17:10:48,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 17:10:48,386 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 17:10:48,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:48,387 INFO L82 PathProgramCache]: Analyzing trace with hash 889631015, now seen corresponding path program 1 times [2020-12-23 17:10:48,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:48,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156489791] [2020-12-23 17:10:48,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:48,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:48,424 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 17:10:48,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156489791] [2020-12-23 17:10:48,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:10:48,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 17:10:48,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964707441] [2020-12-23 17:10:48,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 17:10:48,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:48,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 17:10:48,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 17:10:48,429 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 3 states. [2020-12-23 17:10:48,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:48,471 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2020-12-23 17:10:48,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 17:10:48,472 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-23 17:10:48,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:48,473 INFO L225 Difference]: With dead ends: 58 [2020-12-23 17:10:48,473 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 17:10:48,474 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 17:10:48,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 17:10:48,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2020-12-23 17:10:48,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 17:10:48,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-12-23 17:10:48,482 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2020-12-23 17:10:48,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:48,482 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-12-23 17:10:48,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 17:10:48,483 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-12-23 17:10:48,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 17:10:48,483 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:48,484 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 17:10:48,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 17:10:48,485 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 17:10:48,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:48,486 INFO L82 PathProgramCache]: Analyzing trace with hash 889666573, now seen corresponding path program 1 times [2020-12-23 17:10:48,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:48,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649073036] [2020-12-23 17:10:48,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:48,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:48,572 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 17:10:48,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649073036] [2020-12-23 17:10:48,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:10:48,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 17:10:48,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924422599] [2020-12-23 17:10:48,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 17:10:48,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:48,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 17:10:48,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 17:10:48,581 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 4 states. [2020-12-23 17:10:48,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:48,661 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-12-23 17:10:48,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 17:10:48,662 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-23 17:10:48,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:48,665 INFO L225 Difference]: With dead ends: 32 [2020-12-23 17:10:48,665 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 17:10:48,667 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 17:10:48,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 17:10:48,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-23 17:10:48,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 17:10:48,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-12-23 17:10:48,680 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2020-12-23 17:10:48,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:48,680 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-12-23 17:10:48,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 17:10:48,681 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-12-23 17:10:48,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 17:10:48,681 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:48,681 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 17:10:48,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 17:10:48,682 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 17:10:48,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:48,686 INFO L82 PathProgramCache]: Analyzing trace with hash 889666574, now seen corresponding path program 1 times [2020-12-23 17:10:48,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:48,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333817693] [2020-12-23 17:10:48,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:48,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:48,784 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 17:10:48,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333817693] [2020-12-23 17:10:48,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:10:48,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 17:10:48,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317518738] [2020-12-23 17:10:48,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 17:10:48,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:48,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 17:10:48,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 17:10:48,787 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 4 states. [2020-12-23 17:10:48,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:48,871 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2020-12-23 17:10:48,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 17:10:48,872 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-23 17:10:48,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:48,873 INFO L225 Difference]: With dead ends: 55 [2020-12-23 17:10:48,874 INFO L226 Difference]: Without dead ends: 55 [2020-12-23 17:10:48,874 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 17:10:48,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-23 17:10:48,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2020-12-23 17:10:48,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 17:10:48,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-12-23 17:10:48,881 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2020-12-23 17:10:48,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:48,881 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-12-23 17:10:48,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 17:10:48,881 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-12-23 17:10:48,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 17:10:48,882 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:48,882 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:48,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 17:10:48,883 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 17:10:48,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:48,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1809810359, now seen corresponding path program 1 times [2020-12-23 17:10:48,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:48,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392893466] [2020-12-23 17:10:48,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:48,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:48,929 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 17:10:48,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392893466] [2020-12-23 17:10:48,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:10:48,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 17:10:48,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162406875] [2020-12-23 17:10:48,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 17:10:48,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:48,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 17:10:48,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 17:10:48,933 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 3 states. [2020-12-23 17:10:48,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:48,965 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2020-12-23 17:10:48,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 17:10:48,965 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-23 17:10:48,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:48,967 INFO L225 Difference]: With dead ends: 35 [2020-12-23 17:10:48,967 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 17:10:48,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 17:10:48,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 17:10:48,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-12-23 17:10:48,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 17:10:48,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-12-23 17:10:48,973 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 7 [2020-12-23 17:10:48,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:48,973 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-12-23 17:10:48,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 17:10:48,974 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-12-23 17:10:48,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 17:10:48,974 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:48,975 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:48,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 17:10:48,975 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 17:10:48,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:48,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1480744241, now seen corresponding path program 1 times [2020-12-23 17:10:48,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:48,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338119088] [2020-12-23 17:10:48,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:48,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:49,030 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 17:10:49,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338119088] [2020-12-23 17:10:49,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847055253] [2020-12-23 17:10:49,031 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 17:10:49,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:49,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 17:10:49,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:49,136 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 17:10:49,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:10:49,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2020-12-23 17:10:49,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455713892] [2020-12-23 17:10:49,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 17:10:49,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:49,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 17:10:49,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 17:10:49,139 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 4 states. [2020-12-23 17:10:49,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:49,212 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2020-12-23 17:10:49,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 17:10:49,213 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-23 17:10:49,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:49,214 INFO L225 Difference]: With dead ends: 61 [2020-12-23 17:10:49,215 INFO L226 Difference]: Without dead ends: 61 [2020-12-23 17:10:49,215 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 17:10:49,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-23 17:10:49,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 37. [2020-12-23 17:10:49,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 17:10:49,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-12-23 17:10:49,222 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 10 [2020-12-23 17:10:49,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:49,222 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-12-23 17:10:49,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 17:10:49,223 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-12-23 17:10:49,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 17:10:49,223 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:49,224 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:49,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 17:10:49,439 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 17:10:49,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:49,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1341568839, now seen corresponding path program 1 times [2020-12-23 17:10:49,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:49,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258485522] [2020-12-23 17:10:49,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:49,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:49,517 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 17:10:49,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258485522] [2020-12-23 17:10:49,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:10:49,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 17:10:49,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897287100] [2020-12-23 17:10:49,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 17:10:49,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:49,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 17:10:49,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 17:10:49,535 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 5 states. [2020-12-23 17:10:49,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:49,630 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-12-23 17:10:49,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 17:10:49,631 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-23 17:10:49,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:49,632 INFO L225 Difference]: With dead ends: 36 [2020-12-23 17:10:49,632 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 17:10:49,632 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 17:10:49,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 17:10:49,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-23 17:10:49,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 17:10:49,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-12-23 17:10:49,646 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 11 [2020-12-23 17:10:49,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:49,647 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-12-23 17:10:49,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 17:10:49,647 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-12-23 17:10:49,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 17:10:49,647 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:49,648 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:49,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 17:10:49,648 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 17:10:49,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:49,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1361088610, now seen corresponding path program 1 times [2020-12-23 17:10:49,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:49,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611334260] [2020-12-23 17:10:49,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:49,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:49,748 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 17:10:49,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611334260] [2020-12-23 17:10:49,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071017078] [2020-12-23 17:10:49,749 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 17:10:49,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:49,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 17:10:49,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:49,882 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 17:10:49,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:10:49,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-23 17:10:49,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932851817] [2020-12-23 17:10:49,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 17:10:49,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:49,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 17:10:49,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-23 17:10:49,885 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 6 states. [2020-12-23 17:10:49,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:49,914 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-12-23 17:10:49,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 17:10:49,914 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-23 17:10:49,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:49,915 INFO L225 Difference]: With dead ends: 39 [2020-12-23 17:10:49,915 INFO L226 Difference]: Without dead ends: 39 [2020-12-23 17:10:49,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-23 17:10:49,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-23 17:10:49,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-12-23 17:10:49,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 17:10:49,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-12-23 17:10:49,920 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 12 [2020-12-23 17:10:49,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:49,921 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-12-23 17:10:49,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 17:10:49,921 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-12-23 17:10:49,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 17:10:49,922 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:49,922 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1] [2020-12-23 17:10:50,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:50,136 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 17:10:50,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:50,138 INFO L82 PathProgramCache]: Analyzing trace with hash 2073745800, now seen corresponding path program 2 times [2020-12-23 17:10:50,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:50,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35651058] [2020-12-23 17:10:50,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:50,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:50,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:10:50,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35651058] [2020-12-23 17:10:50,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680656631] [2020-12-23 17:10:50,231 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 17:10:50,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 17:10:50,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:10:50,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 17:10:50,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:50,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:10:50,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:10:50,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2020-12-23 17:10:50,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790936120] [2020-12-23 17:10:50,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 17:10:50,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:50,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 17:10:50,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-23 17:10:50,375 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 9 states. [2020-12-23 17:10:50,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:50,482 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2020-12-23 17:10:50,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 17:10:50,483 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-12-23 17:10:50,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:50,486 INFO L225 Difference]: With dead ends: 84 [2020-12-23 17:10:50,486 INFO L226 Difference]: Without dead ends: 84 [2020-12-23 17:10:50,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-12-23 17:10:50,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-23 17:10:50,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 34. [2020-12-23 17:10:50,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 17:10:50,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-12-23 17:10:50,492 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 15 [2020-12-23 17:10:50,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:50,493 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-12-23 17:10:50,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 17:10:50,493 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-12-23 17:10:50,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 17:10:50,494 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:50,494 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:50,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:50,709 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 17:10:50,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:50,710 INFO L82 PathProgramCache]: Analyzing trace with hash 4840471, now seen corresponding path program 2 times [2020-12-23 17:10:50,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:50,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24783316] [2020-12-23 17:10:50,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:50,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:50,800 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:10:50,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24783316] [2020-12-23 17:10:50,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899294576] [2020-12-23 17:10:50,801 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 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 17:10:50,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 17:10:50,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:10:50,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-23 17:10:50,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:50,919 INFO L348 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-12-23 17:10:50,921 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 17:10:50,922 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:10:50,927 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:10:50,930 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 17:10:50,930 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2020-12-23 17:10:50,975 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 17:10:50,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 17:10:50,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2020-12-23 17:10:50,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375373846] [2020-12-23 17:10:50,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 17:10:50,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:50,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 17:10:50,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 17:10:50,978 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 3 states. [2020-12-23 17:10:50,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:50,997 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-12-23 17:10:50,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 17:10:50,997 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-23 17:10:50,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:51,001 INFO L225 Difference]: With dead ends: 32 [2020-12-23 17:10:51,001 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 17:10:51,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 17:10:51,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 17:10:51,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-23 17:10:51,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 17:10:51,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-12-23 17:10:51,011 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 17 [2020-12-23 17:10:51,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:51,011 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-12-23 17:10:51,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 17:10:51,011 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-12-23 17:10:51,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 17:10:51,012 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:51,012 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:51,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:51,214 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 17:10:51,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:51,217 INFO L82 PathProgramCache]: Analyzing trace with hash 4840472, now seen corresponding path program 1 times [2020-12-23 17:10:51,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:51,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752214644] [2020-12-23 17:10:51,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:51,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:51,294 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:10:51,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752214644] [2020-12-23 17:10:51,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438937916] [2020-12-23 17:10:51,295 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 17:10:51,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:51,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 17:10:51,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:51,439 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:10:51,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:10:51,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-23 17:10:51,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030120509] [2020-12-23 17:10:51,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 17:10:51,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:51,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 17:10:51,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-23 17:10:51,442 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 8 states. [2020-12-23 17:10:51,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:51,478 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2020-12-23 17:10:51,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 17:10:51,478 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-12-23 17:10:51,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:51,479 INFO L225 Difference]: With dead ends: 41 [2020-12-23 17:10:51,479 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 17:10:51,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-23 17:10:51,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 17:10:51,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2020-12-23 17:10:51,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 17:10:51,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-12-23 17:10:51,483 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 17 [2020-12-23 17:10:51,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:51,483 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-12-23 17:10:51,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 17:10:51,484 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-12-23 17:10:51,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 17:10:51,484 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:51,484 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:51,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 17:10:51,694 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 17:10:51,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:51,695 INFO L82 PathProgramCache]: Analyzing trace with hash 452809535, now seen corresponding path program 2 times [2020-12-23 17:10:51,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:51,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712978881] [2020-12-23 17:10:51,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:51,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:51,785 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:10:51,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712978881] [2020-12-23 17:10:51,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954104895] [2020-12-23 17:10:51,787 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 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 17:10:51,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 17:10:51,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:10:51,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 17:10:51,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:51,858 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_10|], 1=[|v_#valid_21|]} [2020-12-23 17:10:51,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 17:10:51,864 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 17:10:51,865 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:10:51,875 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:10:51,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 17:10:51,883 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 17:10:51,885 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 17:10:51,892 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:10:51,894 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 17:10:51,894 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:17 [2020-12-23 17:10:52,008 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 17:10:52,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 17:10:52,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2020-12-23 17:10:52,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178312054] [2020-12-23 17:10:52,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 17:10:52,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:52,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 17:10:52,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 17:10:52,010 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 3 states. [2020-12-23 17:10:52,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:52,046 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2020-12-23 17:10:52,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 17:10:52,047 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-12-23 17:10:52,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:52,048 INFO L225 Difference]: With dead ends: 58 [2020-12-23 17:10:52,049 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 17:10:52,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 17:10:52,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 17:10:52,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2020-12-23 17:10:52,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 17:10:52,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-12-23 17:10:52,053 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 22 [2020-12-23 17:10:52,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:52,054 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-12-23 17:10:52,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 17:10:52,054 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-12-23 17:10:52,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 17:10:52,055 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:52,055 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:52,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:52,270 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 17:10:52,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:52,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1462146076, now seen corresponding path program 1 times [2020-12-23 17:10:52,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:52,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173410256] [2020-12-23 17:10:52,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:52,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:52,345 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 17:10:52,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173410256] [2020-12-23 17:10:52,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984612557] [2020-12-23 17:10:52,346 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 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 17:10:52,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:52,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 17:10:52,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:52,508 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:10:52,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:10:52,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 8 [2020-12-23 17:10:52,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197518124] [2020-12-23 17:10:52,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 17:10:52,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:52,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 17:10:52,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-12-23 17:10:52,511 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 8 states. [2020-12-23 17:10:52,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:52,713 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2020-12-23 17:10:52,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 17:10:52,714 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-12-23 17:10:52,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:52,715 INFO L225 Difference]: With dead ends: 123 [2020-12-23 17:10:52,715 INFO L226 Difference]: Without dead ends: 123 [2020-12-23 17:10:52,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2020-12-23 17:10:52,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-23 17:10:52,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-12-23 17:10:52,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 17:10:52,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2020-12-23 17:10:52,721 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 28 [2020-12-23 17:10:52,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:52,722 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2020-12-23 17:10:52,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 17:10:52,722 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2020-12-23 17:10:52,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 17:10:52,724 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:52,724 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:52,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:52,939 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 17:10:52,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:52,940 INFO L82 PathProgramCache]: Analyzing trace with hash -2053576093, now seen corresponding path program 1 times [2020-12-23 17:10:52,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:52,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222500382] [2020-12-23 17:10:52,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:52,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:53,097 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 90 proven. 34 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-23 17:10:53,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222500382] [2020-12-23 17:10:53,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007332691] [2020-12-23 17:10:53,098 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 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 17:10:53,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:53,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 17:10:53,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:53,323 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 90 proven. 34 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-23 17:10:53,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:10:53,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-12-23 17:10:53,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896419493] [2020-12-23 17:10:53,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 17:10:53,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:53,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 17:10:53,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2020-12-23 17:10:53,334 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand 12 states. [2020-12-23 17:10:53,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:53,429 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2020-12-23 17:10:53,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 17:10:53,429 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2020-12-23 17:10:53,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:53,430 INFO L225 Difference]: With dead ends: 91 [2020-12-23 17:10:53,430 INFO L226 Difference]: Without dead ends: 91 [2020-12-23 17:10:53,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2020-12-23 17:10:53,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-23 17:10:53,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2020-12-23 17:10:53,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-23 17:10:53,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2020-12-23 17:10:53,449 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 54 [2020-12-23 17:10:53,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:53,453 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2020-12-23 17:10:53,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 17:10:53,453 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2020-12-23 17:10:53,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 17:10:53,457 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:53,457 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:53,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 17:10:53,672 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 17:10:53,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:53,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1430852155, now seen corresponding path program 2 times [2020-12-23 17:10:53,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:53,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350691210] [2020-12-23 17:10:53,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:53,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:53,785 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 137 proven. 55 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-12-23 17:10:53,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350691210] [2020-12-23 17:10:53,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400542602] [2020-12-23 17:10:53,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:53,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 17:10:53,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:10:53,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 17:10:53,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:54,042 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 137 proven. 55 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-12-23 17:10:54,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:10:54,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-12-23 17:10:54,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576343850] [2020-12-23 17:10:54,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 17:10:54,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:54,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 17:10:54,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2020-12-23 17:10:54,045 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand 14 states. [2020-12-23 17:10:54,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:54,102 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2020-12-23 17:10:54,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 17:10:54,102 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 64 [2020-12-23 17:10:54,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:54,106 INFO L225 Difference]: With dead ends: 101 [2020-12-23 17:10:54,106 INFO L226 Difference]: Without dead ends: 101 [2020-12-23 17:10:54,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2020-12-23 17:10:54,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-23 17:10:54,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 93. [2020-12-23 17:10:54,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-23 17:10:54,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2020-12-23 17:10:54,123 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 64 [2020-12-23 17:10:54,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:54,123 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2020-12-23 17:10:54,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 17:10:54,123 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2020-12-23 17:10:54,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-23 17:10:54,133 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:54,133 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:54,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 17:10:54,348 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 17:10:54,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:54,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1919974563, now seen corresponding path program 3 times [2020-12-23 17:10:54,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:54,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069061539] [2020-12-23 17:10:54,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:54,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:54,495 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 194 proven. 81 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-12-23 17:10:54,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069061539] [2020-12-23 17:10:54,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249123006] [2020-12-23 17:10:54,496 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 17:10:54,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 17:10:54,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:10:54,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 17:10:54,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:54,579 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_11|], 1=[|v_#valid_22|]} [2020-12-23 17:10:54,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 17:10:54,585 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 17:10:54,586 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:10:54,596 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:10:54,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 17:10:54,607 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 17:10:54,610 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 17:10:54,618 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:10:54,620 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 17:10:54,620 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:17 [2020-12-23 17:10:54,955 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 0 proven. 197 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-12-23 17:10:54,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:10:54,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 3] total 11 [2020-12-23 17:10:54,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615535222] [2020-12-23 17:10:54,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 17:10:54,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:54,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 17:10:54,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-23 17:10:54,958 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand 11 states. [2020-12-23 17:10:55,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:55,492 INFO L93 Difference]: Finished difference Result 156 states and 163 transitions. [2020-12-23 17:10:55,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 17:10:55,493 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 74 [2020-12-23 17:10:55,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:55,494 INFO L225 Difference]: With dead ends: 156 [2020-12-23 17:10:55,494 INFO L226 Difference]: Without dead ends: 156 [2020-12-23 17:10:55,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2020-12-23 17:10:55,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-12-23 17:10:55,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 142. [2020-12-23 17:10:55,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-23 17:10:55,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 149 transitions. [2020-12-23 17:10:55,501 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 149 transitions. Word has length 74 [2020-12-23 17:10:55,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:55,501 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 149 transitions. [2020-12-23 17:10:55,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 17:10:55,501 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 149 transitions. [2020-12-23 17:10:55,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-23 17:10:55,507 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:55,507 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:55,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 17:10:55,722 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 17:10:55,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:55,723 INFO L82 PathProgramCache]: Analyzing trace with hash -703043040, now seen corresponding path program 2 times [2020-12-23 17:10:55,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:55,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972972962] [2020-12-23 17:10:55,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:55,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:55,892 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-12-23 17:10:55,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972972962] [2020-12-23 17:10:55,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977104939] [2020-12-23 17:10:55,896 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 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 17:10:55,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 17:10:55,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:10:55,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 17:10:55,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:55,954 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_12|], 1=[|v_#valid_23|]} [2020-12-23 17:10:55,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 17:10:55,959 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 17:10:55,960 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:10:55,968 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:10:55,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 17:10:55,974 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 17:10:55,975 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 17:10:55,981 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:10:55,982 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 17:10:55,983 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-12-23 17:10:56,351 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2020-12-23 17:10:56,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 17:10:56,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2020-12-23 17:10:56,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964663064] [2020-12-23 17:10:56,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 17:10:56,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:56,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 17:10:56,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 17:10:56,354 INFO L87 Difference]: Start difference. First operand 142 states and 149 transitions. Second operand 4 states. [2020-12-23 17:10:56,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:56,403 INFO L93 Difference]: Finished difference Result 143 states and 149 transitions. [2020-12-23 17:10:56,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 17:10:56,404 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2020-12-23 17:10:56,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:56,406 INFO L225 Difference]: With dead ends: 143 [2020-12-23 17:10:56,406 INFO L226 Difference]: Without dead ends: 143 [2020-12-23 17:10:56,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 17:10:56,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-12-23 17:10:56,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2020-12-23 17:10:56,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-23 17:10:56,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 148 transitions. [2020-12-23 17:10:56,410 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 148 transitions. Word has length 90 [2020-12-23 17:10:56,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:56,411 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 148 transitions. [2020-12-23 17:10:56,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 17:10:56,411 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 148 transitions. [2020-12-23 17:10:56,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-23 17:10:56,412 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:56,412 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:56,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 17:10:56,624 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 17:10:56,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:56,625 INFO L82 PathProgramCache]: Analyzing trace with hash -2094673244, now seen corresponding path program 1 times [2020-12-23 17:10:56,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:56,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635633123] [2020-12-23 17:10:56,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:56,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:56,762 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 262 proven. 112 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2020-12-23 17:10:56,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635633123] [2020-12-23 17:10:56,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766145354] [2020-12-23 17:10:56,762 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 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 17:10:56,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:56,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 17:10:56,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:57,117 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 262 proven. 112 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2020-12-23 17:10:57,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:10:57,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-12-23 17:10:57,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421043365] [2020-12-23 17:10:57,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 17:10:57,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:57,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 17:10:57,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2020-12-23 17:10:57,120 INFO L87 Difference]: Start difference. First operand 142 states and 148 transitions. Second operand 18 states. [2020-12-23 17:10:57,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:57,221 INFO L93 Difference]: Finished difference Result 169 states and 175 transitions. [2020-12-23 17:10:57,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 17:10:57,222 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 93 [2020-12-23 17:10:57,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:57,223 INFO L225 Difference]: With dead ends: 169 [2020-12-23 17:10:57,223 INFO L226 Difference]: Without dead ends: 169 [2020-12-23 17:10:57,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2020-12-23 17:10:57,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-12-23 17:10:57,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 157. [2020-12-23 17:10:57,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-23 17:10:57,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 163 transitions. [2020-12-23 17:10:57,228 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 163 transitions. Word has length 93 [2020-12-23 17:10:57,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:57,229 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 163 transitions. [2020-12-23 17:10:57,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 17:10:57,229 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 163 transitions. [2020-12-23 17:10:57,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-23 17:10:57,230 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:57,230 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:57,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 17:10:57,443 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 17:10:57,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:57,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1716143932, now seen corresponding path program 2 times [2020-12-23 17:10:57,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:57,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384582494] [2020-12-23 17:10:57,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:57,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:57,644 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 339 proven. 148 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2020-12-23 17:10:57,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384582494] [2020-12-23 17:10:57,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49410177] [2020-12-23 17:10:57,645 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 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 17:10:57,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 17:10:57,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:10:57,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 17:10:57,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:57,958 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 641 trivial. 0 not checked. [2020-12-23 17:10:57,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 17:10:57,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 13 [2020-12-23 17:10:57,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520261734] [2020-12-23 17:10:57,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 17:10:57,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:57,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 17:10:57,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-12-23 17:10:57,962 INFO L87 Difference]: Start difference. First operand 157 states and 163 transitions. Second operand 4 states. [2020-12-23 17:10:57,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:57,995 INFO L93 Difference]: Finished difference Result 156 states and 162 transitions. [2020-12-23 17:10:57,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 17:10:57,996 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 103 [2020-12-23 17:10:57,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:57,999 INFO L225 Difference]: With dead ends: 156 [2020-12-23 17:10:58,000 INFO L226 Difference]: Without dead ends: 153 [2020-12-23 17:10:58,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-12-23 17:10:58,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-12-23 17:10:58,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 150. [2020-12-23 17:10:58,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-23 17:10:58,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 154 transitions. [2020-12-23 17:10:58,004 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 154 transitions. Word has length 103 [2020-12-23 17:10:58,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:58,004 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 154 transitions. [2020-12-23 17:10:58,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 17:10:58,005 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 154 transitions. [2020-12-23 17:10:58,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-23 17:10:58,006 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:58,006 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:58,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:58,220 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 17:10:58,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:58,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1660976843, now seen corresponding path program 1 times [2020-12-23 17:10:58,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:58,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332282445] [2020-12-23 17:10:58,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:58,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:58,375 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 339 proven. 148 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-12-23 17:10:58,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332282445] [2020-12-23 17:10:58,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219563848] [2020-12-23 17:10:58,376 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 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 17:10:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:58,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 17:10:58,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:58,805 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 339 proven. 148 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-12-23 17:10:58,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:10:58,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-12-23 17:10:58,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089040778] [2020-12-23 17:10:58,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 17:10:58,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:58,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 17:10:58,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2020-12-23 17:10:58,808 INFO L87 Difference]: Start difference. First operand 150 states and 154 transitions. Second operand 20 states. [2020-12-23 17:10:58,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:58,901 INFO L93 Difference]: Finished difference Result 177 states and 181 transitions. [2020-12-23 17:10:58,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 17:10:58,901 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 104 [2020-12-23 17:10:58,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:58,902 INFO L225 Difference]: With dead ends: 177 [2020-12-23 17:10:58,903 INFO L226 Difference]: Without dead ends: 177 [2020-12-23 17:10:58,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2020-12-23 17:10:58,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-12-23 17:10:58,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 165. [2020-12-23 17:10:58,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-12-23 17:10:58,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 169 transitions. [2020-12-23 17:10:58,907 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 169 transitions. Word has length 104 [2020-12-23 17:10:58,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:58,908 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 169 transitions. [2020-12-23 17:10:58,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 17:10:58,908 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 169 transitions. [2020-12-23 17:10:58,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-23 17:10:58,909 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:58,909 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:59,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:59,126 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 17:10:59,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:59,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1846195037, now seen corresponding path program 2 times [2020-12-23 17:10:59,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:59,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607171027] [2020-12-23 17:10:59,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:59,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:59,303 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 426 proven. 189 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2020-12-23 17:10:59,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607171027] [2020-12-23 17:10:59,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758174365] [2020-12-23 17:10:59,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:59,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 17:10:59,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:10:59,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 17:10:59,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:59,754 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 426 proven. 189 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2020-12-23 17:10:59,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:10:59,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2020-12-23 17:10:59,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055797630] [2020-12-23 17:10:59,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 17:10:59,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:59,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 17:10:59,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2020-12-23 17:10:59,757 INFO L87 Difference]: Start difference. First operand 165 states and 169 transitions. Second operand 22 states. [2020-12-23 17:10:59,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:59,856 INFO L93 Difference]: Finished difference Result 192 states and 196 transitions. [2020-12-23 17:10:59,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 17:10:59,856 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 114 [2020-12-23 17:10:59,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:59,857 INFO L225 Difference]: With dead ends: 192 [2020-12-23 17:10:59,858 INFO L226 Difference]: Without dead ends: 192 [2020-12-23 17:10:59,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2020-12-23 17:10:59,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-12-23 17:10:59,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 180. [2020-12-23 17:10:59,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-12-23 17:10:59,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 184 transitions. [2020-12-23 17:10:59,863 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 184 transitions. Word has length 114 [2020-12-23 17:10:59,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:59,863 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 184 transitions. [2020-12-23 17:10:59,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 17:10:59,863 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 184 transitions. [2020-12-23 17:10:59,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-23 17:10:59,864 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:59,865 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:11:00,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 17:11:00,079 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 17:11:00,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:11:00,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1224310517, now seen corresponding path program 3 times [2020-12-23 17:11:00,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:11:00,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747109763] [2020-12-23 17:11:00,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:11:00,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:00,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 523 proven. 235 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-12-23 17:11:00,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747109763] [2020-12-23 17:11:00,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87755273] [2020-12-23 17:11:00,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:11:00,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 17:11:00,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:11:00,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 17:11:00,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:11:00,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 995 trivial. 0 not checked. [2020-12-23 17:11:00,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:11:00,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 19 [2020-12-23 17:11:00,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658693669] [2020-12-23 17:11:00,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 17:11:00,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:11:00,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 17:11:00,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-12-23 17:11:00,714 INFO L87 Difference]: Start difference. First operand 180 states and 184 transitions. Second operand 19 states. [2020-12-23 17:11:02,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:11:02,114 INFO L93 Difference]: Finished difference Result 218 states and 223 transitions. [2020-12-23 17:11:02,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 17:11:02,115 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 124 [2020-12-23 17:11:02,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:11:02,117 INFO L225 Difference]: With dead ends: 218 [2020-12-23 17:11:02,117 INFO L226 Difference]: Without dead ends: 218 [2020-12-23 17:11:02,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=899, Invalid=1963, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 17:11:02,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-12-23 17:11:02,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 199. [2020-12-23 17:11:02,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-12-23 17:11:02,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 203 transitions. [2020-12-23 17:11:02,124 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 203 transitions. Word has length 124 [2020-12-23 17:11:02,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:11:02,124 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 203 transitions. [2020-12-23 17:11:02,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 17:11:02,124 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 203 transitions. [2020-12-23 17:11:02,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-23 17:11:02,126 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:11:02,126 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-23 17:11:02,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:11:02,342 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 17:11:02,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:11:02,343 INFO L82 PathProgramCache]: Analyzing trace with hash 496940454, now seen corresponding path program 4 times [2020-12-23 17:11:02,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:11:02,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522383163] [2020-12-23 17:11:02,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:11:02,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:02,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 630 proven. 286 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-12-23 17:11:02,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522383163] [2020-12-23 17:11:02,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796021120] [2020-12-23 17:11:02,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:11:02,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 17:11:02,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:11:02,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 17:11:02,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:11:02,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 0 proven. 636 refuted. 0 times theorem prover too weak. 580 trivial. 0 not checked. [2020-12-23 17:11:02,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:11:02,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2020-12-23 17:11:02,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979704454] [2020-12-23 17:11:02,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 17:11:02,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:11:02,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 17:11:02,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2020-12-23 17:11:02,946 INFO L87 Difference]: Start difference. First operand 199 states and 203 transitions. Second operand 17 states. [2020-12-23 17:11:03,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:11:03,997 INFO L93 Difference]: Finished difference Result 307 states and 312 transitions. [2020-12-23 17:11:03,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-23 17:11:03,997 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 138 [2020-12-23 17:11:03,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:11:03,999 INFO L225 Difference]: With dead ends: 307 [2020-12-23 17:11:04,000 INFO L226 Difference]: Without dead ends: 307 [2020-12-23 17:11:04,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=910, Invalid=1846, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 17:11:04,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-12-23 17:11:04,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 217. [2020-12-23 17:11:04,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-12-23 17:11:04,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 221 transitions. [2020-12-23 17:11:04,007 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 221 transitions. Word has length 138 [2020-12-23 17:11:04,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:11:04,007 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 221 transitions. [2020-12-23 17:11:04,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 17:11:04,008 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 221 transitions. [2020-12-23 17:11:04,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-12-23 17:11:04,010 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:11:04,010 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1] [2020-12-23 17:11:04,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 17:11:04,225 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 17:11:04,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:11:04,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1540658664, now seen corresponding path program 4 times [2020-12-23 17:11:04,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:11:04,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634399849] [2020-12-23 17:11:04,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:11:04,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:04,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3275 backedges. 1492 proven. 342 refuted. 0 times theorem prover too weak. 1441 trivial. 0 not checked. [2020-12-23 17:11:04,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634399849] [2020-12-23 17:11:04,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53298635] [2020-12-23 17:11:04,523 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 17:11:04,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 17:11:04,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:11:04,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 17:11:04,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:11:05,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3275 backedges. 1492 proven. 342 refuted. 0 times theorem prover too weak. 1441 trivial. 0 not checked. [2020-12-23 17:11:05,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:11:05,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2020-12-23 17:11:05,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218503492] [2020-12-23 17:11:05,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 17:11:05,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:11:05,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 17:11:05,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2020-12-23 17:11:05,343 INFO L87 Difference]: Start difference. First operand 217 states and 221 transitions. Second operand 28 states. [2020-12-23 17:11:05,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:11:05,484 INFO L93 Difference]: Finished difference Result 244 states and 248 transitions. [2020-12-23 17:11:05,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 17:11:05,484 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 201 [2020-12-23 17:11:05,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:11:05,486 INFO L225 Difference]: With dead ends: 244 [2020-12-23 17:11:05,486 INFO L226 Difference]: Without dead ends: 244 [2020-12-23 17:11:05,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2020-12-23 17:11:05,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-12-23 17:11:05,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 232. [2020-12-23 17:11:05,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-12-23 17:11:05,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 236 transitions. [2020-12-23 17:11:05,492 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 236 transitions. Word has length 201 [2020-12-23 17:11:05,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:11:05,492 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 236 transitions. [2020-12-23 17:11:05,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 17:11:05,493 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 236 transitions. [2020-12-23 17:11:05,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-12-23 17:11:05,495 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:11:05,495 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1] [2020-12-23 17:11:05,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 17:11:05,710 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 17:11:05,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:11:05,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1369292055, now seen corresponding path program 5 times [2020-12-23 17:11:05,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:11:05,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570384454] [2020-12-23 17:11:05,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:11:05,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:06,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3839 backedges. 1746 proven. 403 refuted. 0 times theorem prover too weak. 1690 trivial. 0 not checked. [2020-12-23 17:11:06,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570384454] [2020-12-23 17:11:06,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336208432] [2020-12-23 17:11:06,031 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 17:11:06,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2020-12-23 17:11:06,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:11:06,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 17:11:06,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:11:06,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3839 backedges. 1746 proven. 403 refuted. 0 times theorem prover too weak. 1690 trivial. 0 not checked. [2020-12-23 17:11:06,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:11:06,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2020-12-23 17:11:06,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518315193] [2020-12-23 17:11:06,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 17:11:06,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:11:06,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 17:11:06,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2020-12-23 17:11:06,943 INFO L87 Difference]: Start difference. First operand 232 states and 236 transitions. Second operand 30 states. [2020-12-23 17:11:07,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:11:07,096 INFO L93 Difference]: Finished difference Result 259 states and 263 transitions. [2020-12-23 17:11:07,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 17:11:07,096 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 216 [2020-12-23 17:11:07,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:11:07,098 INFO L225 Difference]: With dead ends: 259 [2020-12-23 17:11:07,098 INFO L226 Difference]: Without dead ends: 259 [2020-12-23 17:11:07,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2020-12-23 17:11:07,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-12-23 17:11:07,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 247. [2020-12-23 17:11:07,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-12-23 17:11:07,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 251 transitions. [2020-12-23 17:11:07,104 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 251 transitions. Word has length 216 [2020-12-23 17:11:07,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:11:07,105 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 251 transitions. [2020-12-23 17:11:07,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 17:11:07,105 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 251 transitions. [2020-12-23 17:11:07,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-12-23 17:11:07,108 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:11:07,108 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1] [2020-12-23 17:11:07,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 17:11:07,323 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 17:11:07,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:11:07,324 INFO L82 PathProgramCache]: Analyzing trace with hash -685055944, now seen corresponding path program 6 times [2020-12-23 17:11:07,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:11:07,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853706722] [2020-12-23 17:11:07,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:11:07,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:11:07,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4448 backedges. 2020 proven. 469 refuted. 0 times theorem prover too weak. 1959 trivial. 0 not checked. [2020-12-23 17:11:07,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853706722] [2020-12-23 17:11:07,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013729105] [2020-12-23 17:11:07,672 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 17:11:07,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 17:11:07,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:11:07,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 17:11:07,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:11:07,752 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_13|], 1=[|v_#valid_26|]} [2020-12-23 17:11:07,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 17:11:07,758 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 17:11:07,759 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:11:07,767 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:11:07,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 17:11:07,772 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 17:11:07,775 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 17:11:07,781 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:11:07,782 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 17:11:07,783 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-12-23 17:11:08,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4448 backedges. 2028 proven. 0 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2020-12-23 17:11:08,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 17:11:08,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [17] total 21 [2020-12-23 17:11:08,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133518480] [2020-12-23 17:11:08,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 17:11:08,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:11:08,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 17:11:08,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2020-12-23 17:11:08,868 INFO L87 Difference]: Start difference. First operand 247 states and 251 transitions. Second operand 6 states. [2020-12-23 17:11:08,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:11:08,913 INFO L93 Difference]: Finished difference Result 245 states and 249 transitions. [2020-12-23 17:11:08,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 17:11:08,914 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 231 [2020-12-23 17:11:08,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:11:08,915 INFO L225 Difference]: With dead ends: 245 [2020-12-23 17:11:08,915 INFO L226 Difference]: Without dead ends: 0 [2020-12-23 17:11:08,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2020-12-23 17:11:08,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-23 17:11:08,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-23 17:11:08,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-23 17:11:08,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-23 17:11:08,916 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 231 [2020-12-23 17:11:08,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:11:08,916 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-23 17:11:08,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 17:11:08,916 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-23 17:11:08,916 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-23 17:11:09,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 17:11:09,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 05:11:09 BoogieIcfgContainer [2020-12-23 17:11:09,136 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 17:11:09,137 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 17:11:09,137 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 17:11:09,137 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 17:11:09,138 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 05:10:47" (3/4) ... [2020-12-23 17:11:09,142 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-23 17:11:09,154 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2020-12-23 17:11:09,154 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-23 17:11:09,155 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-23 17:11:09,203 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/ldv-memsafety/ArraysOfVariableLength6.c-witness.graphml [2020-12-23 17:11:09,203 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 17:11:09,205 INFO L168 Benchmark]: Toolchain (without parser) took 22306.27 ms. Allocated memory was 151.0 MB in the beginning and 377.5 MB in the end (delta: 226.5 MB). Free memory was 126.3 MB in the beginning and 163.0 MB in the end (delta: -36.7 MB). Peak memory consumption was 192.0 MB. Max. memory is 8.0 GB. [2020-12-23 17:11:09,205 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory was 123.5 MB in the beginning and 123.5 MB in the end (delta: 82.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 17:11:09,206 INFO L168 Benchmark]: CACSL2BoogieTranslator took 270.54 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 117.1 MB in the end (delta: 9.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 17:11:09,206 INFO L168 Benchmark]: Boogie Procedure Inliner took 62.01 ms. Allocated memory is still 151.0 MB. Free memory was 117.1 MB in the beginning and 115.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 17:11:09,206 INFO L168 Benchmark]: Boogie Preprocessor took 29.26 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 114.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 17:11:09,207 INFO L168 Benchmark]: RCFGBuilder took 496.12 ms. Allocated memory is still 151.0 MB. Free memory was 114.4 MB in the beginning and 133.5 MB in the end (delta: -19.1 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. [2020-12-23 17:11:09,208 INFO L168 Benchmark]: TraceAbstraction took 21367.85 ms. Allocated memory was 151.0 MB in the beginning and 377.5 MB in the end (delta: 226.5 MB). Free memory was 133.2 MB in the beginning and 165.7 MB in the end (delta: -32.5 MB). Peak memory consumption was 195.1 MB. Max. memory is 8.0 GB. [2020-12-23 17:11:09,208 INFO L168 Benchmark]: Witness Printer took 66.71 ms. Allocated memory is still 377.5 MB. Free memory was 165.7 MB in the beginning and 163.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 17:11:09,211 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory was 123.5 MB in the beginning and 123.5 MB in the end (delta: 82.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 270.54 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 117.1 MB in the end (delta: 9.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 62.01 ms. Allocated memory is still 151.0 MB. Free memory was 117.1 MB in the beginning and 115.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 29.26 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 114.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 496.12 ms. Allocated memory is still 151.0 MB. Free memory was 114.4 MB in the beginning and 133.5 MB in the end (delta: -19.1 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 21367.85 ms. Allocated memory was 151.0 MB in the beginning and 377.5 MB in the end (delta: 226.5 MB). Free memory was 133.2 MB in the beginning and 165.7 MB in the end (delta: -32.5 MB). Peak memory consumption was 195.1 MB. Max. memory is 8.0 GB. * Witness Printer took 66.71 ms. Allocated memory is still 377.5 MB. Free memory was 165.7 MB in the beginning and 163.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 16]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 31 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 21.2s, OverallIterations: 26, TraceHistogramMax: 42, AutomataDifference: 4.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 534 SDtfs, 2229 SDslu, 1522 SDs, 0 SdLazy, 1744 SolverSat, 242 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2006 GetRequests, 1653 SyntacticMatches, 2 SemanticMatches, 351 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1835 ImplicationChecksByTransitivity, 5.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=247occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 26 MinimizatonAttempts, 409 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 8.6s InterpolantComputationTime, 3495 NumberOfCodeBlocks, 2916 NumberOfCodeBlocksAsserted, 81 NumberOfCheckSat, 3449 ConstructedInterpolants, 410 QuantifiedInterpolants, 2706696 SizeOfPredicates, 38 NumberOfNonLiveVariables, 3589 ConjunctsInSsa, 169 ConjunctsInUnsatCore, 46 InterpolantComputations, 11 PerfectInterpolantSequences, 30425/35387 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...