./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/locks/test_locks_5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/locks/test_locks_5.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d28fd50bd3f7e49bee026aec860ad9015a4fdfba ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 07:51:13,210 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 07:51:13,213 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 07:51:13,252 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 07:51:13,253 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 07:51:13,256 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 07:51:13,258 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 07:51:13,263 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 07:51:13,273 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 07:51:13,278 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 07:51:13,279 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 07:51:13,284 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 07:51:13,284 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 07:51:13,285 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 07:51:13,286 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 07:51:13,287 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 07:51:13,288 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 07:51:13,289 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 07:51:13,290 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 07:51:13,292 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 07:51:13,293 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 07:51:13,294 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 07:51:13,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 07:51:13,295 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 07:51:13,298 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 07:51:13,298 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 07:51:13,298 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 07:51:13,299 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 07:51:13,300 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 07:51:13,300 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 07:51:13,301 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 07:51:13,301 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 07:51:13,302 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 07:51:13,303 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 07:51:13,304 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 07:51:13,304 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 07:51:13,304 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 07:51:13,305 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 07:51:13,305 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 07:51:13,306 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 07:51:13,306 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 07:51:13,307 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-27 07:51:13,336 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 07:51:13,337 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 07:51:13,338 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 07:51:13,339 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 07:51:13,340 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 07:51:13,341 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 07:51:13,341 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 07:51:13,341 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 07:51:13,341 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 07:51:13,342 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 07:51:13,342 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 07:51:13,343 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 07:51:13,343 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 07:51:13,343 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 07:51:13,343 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 07:51:13,344 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 07:51:13,344 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 07:51:13,344 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 07:51:13,344 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 07:51:13,344 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 07:51:13,345 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 07:51:13,345 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 07:51:13,345 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 07:51:13,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 07:51:13,346 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 07:51:13,346 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 07:51:13,346 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 07:51:13,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 07:51:13,347 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 07:51:13,347 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d28fd50bd3f7e49bee026aec860ad9015a4fdfba [2021-08-27 07:51:13,642 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 07:51:13,674 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 07:51:13,677 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 07:51:13,678 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 07:51:13,679 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 07:51:13,680 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/locks/test_locks_5.c [2021-08-27 07:51:13,761 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c9b4adbb/674f503618894263bd149d78ca7d40bf/FLAGf890fe772 [2021-08-27 07:51:14,214 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 07:51:14,215 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_5.c [2021-08-27 07:51:14,221 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c9b4adbb/674f503618894263bd149d78ca7d40bf/FLAGf890fe772 [2021-08-27 07:51:14,239 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c9b4adbb/674f503618894263bd149d78ca7d40bf [2021-08-27 07:51:14,242 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 07:51:14,244 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 07:51:14,246 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 07:51:14,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 07:51:14,250 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 07:51:14,250 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 07:51:14" (1/1) ... [2021-08-27 07:51:14,251 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64de308b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:51:14, skipping insertion in model container [2021-08-27 07:51:14,251 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 07:51:14" (1/1) ... [2021-08-27 07:51:14,258 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 07:51:14,273 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 07:51:14,430 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_5.c[2207,2220] [2021-08-27 07:51:14,440 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 07:51:14,450 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 07:51:14,483 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_5.c[2207,2220] [2021-08-27 07:51:14,484 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 07:51:14,498 INFO L208 MainTranslator]: Completed translation [2021-08-27 07:51:14,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:51:14 WrapperNode [2021-08-27 07:51:14,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 07:51:14,502 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 07:51:14,502 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 07:51:14,502 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 07:51:14,511 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:51:14" (1/1) ... [2021-08-27 07:51:14,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:51:14" (1/1) ... [2021-08-27 07:51:14,518 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:51:14" (1/1) ... [2021-08-27 07:51:14,518 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:51:14" (1/1) ... [2021-08-27 07:51:14,532 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:51:14" (1/1) ... [2021-08-27 07:51:14,537 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:51:14" (1/1) ... [2021-08-27 07:51:14,545 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:51:14" (1/1) ... [2021-08-27 07:51:14,548 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 07:51:14,551 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 07:51:14,551 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 07:51:14,551 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 07:51:14,552 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:51:14" (1/1) ... [2021-08-27 07:51:14,558 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 07:51:14,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:51:14,577 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-27 07:51:14,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-27 07:51:14,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 07:51:14,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 07:51:14,624 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-27 07:51:14,624 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 07:51:14,625 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 07:51:14,625 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-27 07:51:14,626 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-27 07:51:14,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 07:51:14,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-27 07:51:14,626 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 07:51:14,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 07:51:14,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-27 07:51:14,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 07:51:14,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-27 07:51:14,627 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-27 07:51:14,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 07:51:14,966 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 07:51:14,967 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-08-27 07:51:14,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 07:51:14 BoogieIcfgContainer [2021-08-27 07:51:14,968 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 07:51:14,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 07:51:14,970 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 07:51:14,972 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 07:51:14,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 07:51:14" (1/3) ... [2021-08-27 07:51:14,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c062ca3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 07:51:14, skipping insertion in model container [2021-08-27 07:51:14,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:51:14" (2/3) ... [2021-08-27 07:51:14,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c062ca3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 07:51:14, skipping insertion in model container [2021-08-27 07:51:14,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 07:51:14" (3/3) ... [2021-08-27 07:51:14,975 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_5.c [2021-08-27 07:51:14,979 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 07:51:14,980 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-08-27 07:51:15,021 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 07:51:15,026 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-27 07:51:15,027 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-27 07:51:15,045 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 26 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 07:51:15,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-27 07:51:15,050 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:51:15,051 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:51:15,052 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-08-27 07:51:15,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:51:15,059 INFO L82 PathProgramCache]: Analyzing trace with hash -907800099, now seen corresponding path program 1 times [2021-08-27 07:51:15,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:51:15,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562600498] [2021-08-27 07:51:15,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:51:15,070 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:51:15,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:15,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:51:15,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:15,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:51:15,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:51:15,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562600498] [2021-08-27 07:51:15,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562600498] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:51:15,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:51:15,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 07:51:15,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161201739] [2021-08-27 07:51:15,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-27 07:51:15,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:51:15,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-27 07:51:15,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 07:51:15,370 INFO L87 Difference]: Start difference. First operand has 31 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 26 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:51:15,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:51:15,403 INFO L93 Difference]: Finished difference Result 30 states and 44 transitions. [2021-08-27 07:51:15,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-27 07:51:15,406 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-08-27 07:51:15,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:51:15,412 INFO L225 Difference]: With dead ends: 30 [2021-08-27 07:51:15,413 INFO L226 Difference]: Without dead ends: 25 [2021-08-27 07:51:15,414 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 07:51:15,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-08-27 07:51:15,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-08-27 07:51:15,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:51:15,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 39 transitions. [2021-08-27 07:51:15,441 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 39 transitions. Word has length 9 [2021-08-27 07:51:15,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:51:15,441 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 39 transitions. [2021-08-27 07:51:15,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:51:15,442 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 39 transitions. [2021-08-27 07:51:15,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-27 07:51:15,442 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:51:15,442 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:51:15,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 07:51:15,443 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-08-27 07:51:15,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:51:15,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1338121182, now seen corresponding path program 1 times [2021-08-27 07:51:15,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:51:15,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288517056] [2021-08-27 07:51:15,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:51:15,444 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:51:15,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:15,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:51:15,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:15,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:51:15,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:51:15,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288517056] [2021-08-27 07:51:15,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288517056] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:51:15,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:51:15,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 07:51:15,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938601246] [2021-08-27 07:51:15,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 07:51:15,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:51:15,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 07:51:15,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:51:15,556 INFO L87 Difference]: Start difference. First operand 25 states and 39 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:51:15,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:51:15,791 INFO L93 Difference]: Finished difference Result 43 states and 69 transitions. [2021-08-27 07:51:15,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 07:51:15,791 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-08-27 07:51:15,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:51:15,792 INFO L225 Difference]: With dead ends: 43 [2021-08-27 07:51:15,793 INFO L226 Difference]: Without dead ends: 43 [2021-08-27 07:51:15,793 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 93.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 07:51:15,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-27 07:51:15,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2021-08-27 07:51:15,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:51:15,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 50 transitions. [2021-08-27 07:51:15,799 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 50 transitions. Word has length 16 [2021-08-27 07:51:15,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:51:15,799 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 50 transitions. [2021-08-27 07:51:15,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:51:15,799 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 50 transitions. [2021-08-27 07:51:15,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-27 07:51:15,800 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:51:15,800 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:51:15,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 07:51:15,801 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-08-27 07:51:15,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:51:15,801 INFO L82 PathProgramCache]: Analyzing trace with hash -2147467808, now seen corresponding path program 1 times [2021-08-27 07:51:15,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:51:15,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819011495] [2021-08-27 07:51:15,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:51:15,802 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:51:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:15,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:51:15,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:15,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:51:15,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:51:15,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819011495] [2021-08-27 07:51:15,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819011495] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:51:15,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:51:15,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 07:51:15,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111541132] [2021-08-27 07:51:15,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 07:51:15,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:51:15,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 07:51:15,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:51:15,892 INFO L87 Difference]: Start difference. First operand 31 states and 50 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:51:16,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:51:16,071 INFO L93 Difference]: Finished difference Result 43 states and 67 transitions. [2021-08-27 07:51:16,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 07:51:16,072 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-08-27 07:51:16,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:51:16,074 INFO L225 Difference]: With dead ends: 43 [2021-08-27 07:51:16,074 INFO L226 Difference]: Without dead ends: 43 [2021-08-27 07:51:16,076 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 81.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 07:51:16,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-27 07:51:16,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2021-08-27 07:51:16,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 37 states have internal predecessors, (63), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:51:16,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 66 transitions. [2021-08-27 07:51:16,091 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 66 transitions. Word has length 16 [2021-08-27 07:51:16,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:51:16,091 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 66 transitions. [2021-08-27 07:51:16,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:51:16,092 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 66 transitions. [2021-08-27 07:51:16,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-27 07:51:16,094 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:51:16,094 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:51:16,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 07:51:16,094 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-08-27 07:51:16,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:51:16,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1468131321, now seen corresponding path program 1 times [2021-08-27 07:51:16,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:51:16,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426812422] [2021-08-27 07:51:16,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:51:16,096 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:51:16,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:16,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:51:16,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:16,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:51:16,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:51:16,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426812422] [2021-08-27 07:51:16,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426812422] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:51:16,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:51:16,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 07:51:16,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240843137] [2021-08-27 07:51:16,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 07:51:16,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:51:16,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 07:51:16,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:51:16,249 INFO L87 Difference]: Start difference. First operand 41 states and 66 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:51:16,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:51:16,403 INFO L93 Difference]: Finished difference Result 46 states and 69 transitions. [2021-08-27 07:51:16,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 07:51:16,404 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-08-27 07:51:16,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:51:16,405 INFO L225 Difference]: With dead ends: 46 [2021-08-27 07:51:16,405 INFO L226 Difference]: Without dead ends: 46 [2021-08-27 07:51:16,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 07:51:16,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-08-27 07:51:16,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2021-08-27 07:51:16,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 40 states have (on average 1.625) internal successors, (65), 40 states have internal predecessors, (65), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:51:16,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 68 transitions. [2021-08-27 07:51:16,410 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 68 transitions. Word has length 17 [2021-08-27 07:51:16,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:51:16,410 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 68 transitions. [2021-08-27 07:51:16,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:51:16,410 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 68 transitions. [2021-08-27 07:51:16,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-27 07:51:16,411 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:51:16,411 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:51:16,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-27 07:51:16,412 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-08-27 07:51:16,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:51:16,412 INFO L82 PathProgramCache]: Analyzing trace with hash -2146777605, now seen corresponding path program 1 times [2021-08-27 07:51:16,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:51:16,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913148666] [2021-08-27 07:51:16,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:51:16,413 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:51:16,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:16,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:51:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:16,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:51:16,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:51:16,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913148666] [2021-08-27 07:51:16,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913148666] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:51:16,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:51:16,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 07:51:16,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850922611] [2021-08-27 07:51:16,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 07:51:16,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:51:16,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 07:51:16,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:51:16,489 INFO L87 Difference]: Start difference. First operand 44 states and 68 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:51:16,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:51:16,642 INFO L93 Difference]: Finished difference Result 77 states and 118 transitions. [2021-08-27 07:51:16,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 07:51:16,643 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-08-27 07:51:16,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:51:16,648 INFO L225 Difference]: With dead ends: 77 [2021-08-27 07:51:16,648 INFO L226 Difference]: Without dead ends: 77 [2021-08-27 07:51:16,649 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 81.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 07:51:16,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-08-27 07:51:16,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2021-08-27 07:51:16,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 71 states have (on average 1.6056338028169015) internal successors, (114), 71 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:51:16,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 117 transitions. [2021-08-27 07:51:16,669 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 117 transitions. Word has length 17 [2021-08-27 07:51:16,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:51:16,670 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 117 transitions. [2021-08-27 07:51:16,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:51:16,670 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 117 transitions. [2021-08-27 07:51:16,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-27 07:51:16,671 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:51:16,671 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:51:16,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-27 07:51:16,671 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-08-27 07:51:16,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:51:16,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1337430979, now seen corresponding path program 1 times [2021-08-27 07:51:16,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:51:16,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493648610] [2021-08-27 07:51:16,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:51:16,672 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:51:16,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:16,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:51:16,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:16,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:51:16,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:51:16,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493648610] [2021-08-27 07:51:16,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493648610] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:51:16,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:51:16,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 07:51:16,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710786710] [2021-08-27 07:51:16,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 07:51:16,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:51:16,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 07:51:16,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:51:16,783 INFO L87 Difference]: Start difference. First operand 75 states and 117 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:51:16,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:51:16,870 INFO L93 Difference]: Finished difference Result 93 states and 144 transitions. [2021-08-27 07:51:16,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 07:51:16,870 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-08-27 07:51:16,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:51:16,871 INFO L225 Difference]: With dead ends: 93 [2021-08-27 07:51:16,871 INFO L226 Difference]: Without dead ends: 93 [2021-08-27 07:51:16,872 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 68.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 07:51:16,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-08-27 07:51:16,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 75. [2021-08-27 07:51:16,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 71 states have (on average 1.5774647887323943) internal successors, (112), 71 states have internal predecessors, (112), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:51:16,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 115 transitions. [2021-08-27 07:51:16,876 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 115 transitions. Word has length 17 [2021-08-27 07:51:16,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:51:16,876 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 115 transitions. [2021-08-27 07:51:16,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:51:16,877 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 115 transitions. [2021-08-27 07:51:16,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-27 07:51:16,877 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:51:16,877 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:51:16,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-27 07:51:16,878 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-08-27 07:51:16,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:51:16,878 INFO L82 PathProgramCache]: Analyzing trace with hash -2125380971, now seen corresponding path program 1 times [2021-08-27 07:51:16,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:51:16,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913124465] [2021-08-27 07:51:16,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:51:16,879 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:51:16,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:16,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:51:16,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:16,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:51:16,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:51:16,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913124465] [2021-08-27 07:51:16,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913124465] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:51:16,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:51:16,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 07:51:16,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713075106] [2021-08-27 07:51:16,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 07:51:16,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:51:16,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 07:51:16,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:51:16,944 INFO L87 Difference]: Start difference. First operand 75 states and 115 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:51:17,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:51:17,038 INFO L93 Difference]: Finished difference Result 129 states and 198 transitions. [2021-08-27 07:51:17,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 07:51:17,038 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-08-27 07:51:17,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:51:17,039 INFO L225 Difference]: With dead ends: 129 [2021-08-27 07:51:17,039 INFO L226 Difference]: Without dead ends: 129 [2021-08-27 07:51:17,039 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 68.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 07:51:17,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-08-27 07:51:17,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 103. [2021-08-27 07:51:17,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 99 states have (on average 1.5555555555555556) internal successors, (154), 99 states have internal predecessors, (154), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:51:17,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 157 transitions. [2021-08-27 07:51:17,044 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 157 transitions. Word has length 18 [2021-08-27 07:51:17,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:51:17,044 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 157 transitions. [2021-08-27 07:51:17,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:51:17,044 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 157 transitions. [2021-08-27 07:51:17,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-27 07:51:17,045 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:51:17,045 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:51:17,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-27 07:51:17,045 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-08-27 07:51:17,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:51:17,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1360239699, now seen corresponding path program 1 times [2021-08-27 07:51:17,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:51:17,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968650826] [2021-08-27 07:51:17,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:51:17,046 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:51:17,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:17,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:51:17,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:17,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:51:17,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:51:17,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968650826] [2021-08-27 07:51:17,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968650826] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:51:17,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:51:17,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 07:51:17,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323898053] [2021-08-27 07:51:17,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 07:51:17,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:51:17,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 07:51:17,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:51:17,109 INFO L87 Difference]: Start difference. First operand 103 states and 157 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:51:17,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:51:17,185 INFO L93 Difference]: Finished difference Result 137 states and 200 transitions. [2021-08-27 07:51:17,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 07:51:17,185 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-08-27 07:51:17,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:51:17,186 INFO L225 Difference]: With dead ends: 137 [2021-08-27 07:51:17,187 INFO L226 Difference]: Without dead ends: 137 [2021-08-27 07:51:17,187 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 07:51:17,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-08-27 07:51:17,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2021-08-27 07:51:17,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 131 states have (on average 1.4961832061068703) internal successors, (196), 131 states have internal predecessors, (196), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:51:17,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 199 transitions. [2021-08-27 07:51:17,193 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 199 transitions. Word has length 18 [2021-08-27 07:51:17,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:51:17,194 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 199 transitions. [2021-08-27 07:51:17,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:51:17,194 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 199 transitions. [2021-08-27 07:51:17,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-27 07:51:17,195 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:51:17,195 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:51:17,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-27 07:51:17,196 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-08-27 07:51:17,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:51:17,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1462084976, now seen corresponding path program 1 times [2021-08-27 07:51:17,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:51:17,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269017190] [2021-08-27 07:51:17,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:51:17,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:51:17,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:17,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:51:17,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:17,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:51:17,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:51:17,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269017190] [2021-08-27 07:51:17,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269017190] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:51:17,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:51:17,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 07:51:17,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249959625] [2021-08-27 07:51:17,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 07:51:17,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:51:17,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 07:51:17,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:51:17,248 INFO L87 Difference]: Start difference. First operand 135 states and 199 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:51:17,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:51:17,320 INFO L93 Difference]: Finished difference Result 143 states and 204 transitions. [2021-08-27 07:51:17,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 07:51:17,325 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-08-27 07:51:17,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:51:17,327 INFO L225 Difference]: With dead ends: 143 [2021-08-27 07:51:17,327 INFO L226 Difference]: Without dead ends: 143 [2021-08-27 07:51:17,330 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 07:51:17,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-08-27 07:51:17,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2021-08-27 07:51:17,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 137 states have (on average 1.4598540145985401) internal successors, (200), 137 states have internal predecessors, (200), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:51:17,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 203 transitions. [2021-08-27 07:51:17,348 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 203 transitions. Word has length 19 [2021-08-27 07:51:17,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:51:17,349 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 203 transitions. [2021-08-27 07:51:17,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:51:17,349 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 203 transitions. [2021-08-27 07:51:17,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-27 07:51:17,351 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:51:17,351 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:51:17,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-27 07:51:17,352 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-08-27 07:51:17,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:51:17,353 INFO L82 PathProgramCache]: Analyzing trace with hash -782026606, now seen corresponding path program 1 times [2021-08-27 07:51:17,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:51:17,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944594897] [2021-08-27 07:51:17,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:51:17,355 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:51:17,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:17,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:51:17,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:17,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:51:17,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:51:17,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944594897] [2021-08-27 07:51:17,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944594897] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:51:17,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:51:17,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 07:51:17,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042216605] [2021-08-27 07:51:17,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 07:51:17,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:51:17,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 07:51:17,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:51:17,424 INFO L87 Difference]: Start difference. First operand 141 states and 203 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:51:17,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:51:17,503 INFO L93 Difference]: Finished difference Result 235 states and 332 transitions. [2021-08-27 07:51:17,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 07:51:17,504 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-08-27 07:51:17,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:51:17,506 INFO L225 Difference]: With dead ends: 235 [2021-08-27 07:51:17,506 INFO L226 Difference]: Without dead ends: 235 [2021-08-27 07:51:17,506 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 07:51:17,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-08-27 07:51:17,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 201. [2021-08-27 07:51:17,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 197 states have (on average 1.4213197969543148) internal successors, (280), 197 states have internal predecessors, (280), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:51:17,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 283 transitions. [2021-08-27 07:51:17,513 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 283 transitions. Word has length 19 [2021-08-27 07:51:17,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:51:17,513 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 283 transitions. [2021-08-27 07:51:17,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:51:17,514 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 283 transitions. [2021-08-27 07:51:17,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-27 07:51:17,519 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:51:17,520 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:51:17,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-27 07:51:17,520 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-08-27 07:51:17,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:51:17,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1591373232, now seen corresponding path program 1 times [2021-08-27 07:51:17,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:51:17,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715934537] [2021-08-27 07:51:17,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:51:17,523 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:51:17,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:17,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:51:17,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:17,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:51:17,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:51:17,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715934537] [2021-08-27 07:51:17,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715934537] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:51:17,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:51:17,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 07:51:17,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966500557] [2021-08-27 07:51:17,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 07:51:17,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:51:17,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 07:51:17,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:51:17,575 INFO L87 Difference]: Start difference. First operand 201 states and 283 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:51:17,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:51:17,647 INFO L93 Difference]: Finished difference Result 259 states and 344 transitions. [2021-08-27 07:51:17,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 07:51:17,647 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-08-27 07:51:17,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:51:17,648 INFO L225 Difference]: With dead ends: 259 [2021-08-27 07:51:17,648 INFO L226 Difference]: Without dead ends: 259 [2021-08-27 07:51:17,649 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 07:51:17,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-08-27 07:51:17,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 257. [2021-08-27 07:51:17,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 253 states have (on average 1.3438735177865613) internal successors, (340), 253 states have internal predecessors, (340), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:51:17,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 343 transitions. [2021-08-27 07:51:17,655 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 343 transitions. Word has length 19 [2021-08-27 07:51:17,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:51:17,655 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 343 transitions. [2021-08-27 07:51:17,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:51:17,655 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 343 transitions. [2021-08-27 07:51:17,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-27 07:51:17,656 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:51:17,656 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:51:17,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-27 07:51:17,657 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-08-27 07:51:17,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:51:17,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1527195016, now seen corresponding path program 1 times [2021-08-27 07:51:17,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:51:17,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646449850] [2021-08-27 07:51:17,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:51:17,657 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:51:17,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:17,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:51:17,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:17,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:51:17,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:51:17,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646449850] [2021-08-27 07:51:17,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646449850] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:51:17,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:51:17,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 07:51:17,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106418888] [2021-08-27 07:51:17,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 07:51:17,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:51:17,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 07:51:17,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:51:17,712 INFO L87 Difference]: Start difference. First operand 257 states and 343 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:51:17,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:51:17,789 INFO L93 Difference]: Finished difference Result 267 states and 344 transitions. [2021-08-27 07:51:17,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 07:51:17,789 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-08-27 07:51:17,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:51:17,791 INFO L225 Difference]: With dead ends: 267 [2021-08-27 07:51:17,791 INFO L226 Difference]: Without dead ends: 267 [2021-08-27 07:51:17,791 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 07:51:17,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-08-27 07:51:17,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 265. [2021-08-27 07:51:17,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 261 states have (on average 1.3026819923371646) internal successors, (340), 261 states have internal predecessors, (340), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:51:17,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 343 transitions. [2021-08-27 07:51:17,798 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 343 transitions. Word has length 20 [2021-08-27 07:51:17,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:51:17,798 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 343 transitions. [2021-08-27 07:51:17,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:51:17,799 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 343 transitions. [2021-08-27 07:51:17,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-27 07:51:17,799 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:51:17,800 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:51:17,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-27 07:51:17,800 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-08-27 07:51:17,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:51:17,801 INFO L82 PathProgramCache]: Analyzing trace with hash -2087713910, now seen corresponding path program 1 times [2021-08-27 07:51:17,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:51:17,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360621102] [2021-08-27 07:51:17,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:51:17,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:51:17,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:17,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:51:17,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:17,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:51:17,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:51:17,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360621102] [2021-08-27 07:51:17,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360621102] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:51:17,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:51:17,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 07:51:17,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969785265] [2021-08-27 07:51:17,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 07:51:17,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:51:17,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 07:51:17,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:51:17,857 INFO L87 Difference]: Start difference. First operand 265 states and 343 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:51:17,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:51:17,931 INFO L93 Difference]: Finished difference Result 425 states and 527 transitions. [2021-08-27 07:51:17,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 07:51:17,931 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-08-27 07:51:17,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:51:17,933 INFO L225 Difference]: With dead ends: 425 [2021-08-27 07:51:17,934 INFO L226 Difference]: Without dead ends: 425 [2021-08-27 07:51:17,934 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 07:51:17,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-08-27 07:51:17,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 393. [2021-08-27 07:51:17,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 389 states have (on average 1.2647814910025708) internal successors, (492), 389 states have internal predecessors, (492), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:51:17,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 495 transitions. [2021-08-27 07:51:17,943 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 495 transitions. Word has length 20 [2021-08-27 07:51:17,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:51:17,945 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 495 transitions. [2021-08-27 07:51:17,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:51:17,946 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 495 transitions. [2021-08-27 07:51:17,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-27 07:51:17,949 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:51:17,949 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:51:17,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-27 07:51:17,950 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-08-27 07:51:17,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:51:17,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1397906760, now seen corresponding path program 1 times [2021-08-27 07:51:17,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:51:17,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361667898] [2021-08-27 07:51:17,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:51:17,951 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:51:17,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:17,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:51:18,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:18,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:51:18,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:51:18,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361667898] [2021-08-27 07:51:18,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361667898] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:51:18,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:51:18,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 07:51:18,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799574060] [2021-08-27 07:51:18,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 07:51:18,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:51:18,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 07:51:18,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:51:18,021 INFO L87 Difference]: Start difference. First operand 393 states and 495 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:51:18,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:51:18,090 INFO L93 Difference]: Finished difference Result 487 states and 566 transitions. [2021-08-27 07:51:18,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 07:51:18,090 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-08-27 07:51:18,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:51:18,091 INFO L225 Difference]: With dead ends: 487 [2021-08-27 07:51:18,091 INFO L226 Difference]: Without dead ends: 0 [2021-08-27 07:51:18,092 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 07:51:18,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-27 07:51:18,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-27 07:51:18,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 07:51:18,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-27 07:51:18,093 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2021-08-27 07:51:18,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:51:18,093 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 07:51:18,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:51:18,094 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-27 07:51:18,094 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-27 07:51:18,097 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONMEMORY_LEAK [2021-08-27 07:51:18,099 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 07:51:18,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-27 07:51:18,103 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 07:51:18,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 07:51:18 BoogieIcfgContainer [2021-08-27 07:51:18,112 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 07:51:18,113 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 07:51:18,113 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 07:51:18,113 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 07:51:18,114 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 07:51:14" (3/4) ... [2021-08-27 07:51:18,117 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-27 07:51:18,123 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2021-08-27 07:51:18,123 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-08-27 07:51:18,123 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-08-27 07:51:18,129 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-08-27 07:51:18,129 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-27 07:51:18,129 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-08-27 07:51:18,129 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-27 07:51:18,171 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 07:51:18,172 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 07:51:18,174 INFO L168 Benchmark]: Toolchain (without parser) took 3929.19 ms. Allocated memory was 48.2 MB in the beginning and 104.9 MB in the end (delta: 56.6 MB). Free memory was 24.4 MB in the beginning and 84.1 MB in the end (delta: -59.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 07:51:18,174 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 48.2 MB. Free memory was 30.9 MB in the beginning and 30.9 MB in the end (delta: 33.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 07:51:18,175 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.59 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 24.2 MB in the beginning and 36.1 MB in the end (delta: -12.0 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2021-08-27 07:51:18,175 INFO L168 Benchmark]: Boogie Preprocessor took 47.99 ms. Allocated memory is still 58.7 MB. Free memory was 36.1 MB in the beginning and 34.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 07:51:18,175 INFO L168 Benchmark]: RCFGBuilder took 417.74 ms. Allocated memory is still 58.7 MB. Free memory was 34.5 MB in the beginning and 31.1 MB in the end (delta: 3.4 MB). Peak memory consumption was 7.9 MB. Max. memory is 16.1 GB. [2021-08-27 07:51:18,176 INFO L168 Benchmark]: TraceAbstraction took 3142.39 ms. Allocated memory was 58.7 MB in the beginning and 104.9 MB in the end (delta: 46.1 MB). Free memory was 30.7 MB in the beginning and 87.1 MB in the end (delta: -56.3 MB). Peak memory consumption was 28.8 MB. Max. memory is 16.1 GB. [2021-08-27 07:51:18,176 INFO L168 Benchmark]: Witness Printer took 58.91 ms. Allocated memory is still 104.9 MB. Free memory was 87.1 MB in the beginning and 84.1 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 07:51:18,177 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 48.2 MB. Free memory was 30.9 MB in the beginning and 30.9 MB in the end (delta: 33.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 254.59 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 24.2 MB in the beginning and 36.1 MB in the end (delta: -12.0 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 47.99 ms. Allocated memory is still 58.7 MB. Free memory was 36.1 MB in the beginning and 34.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 417.74 ms. Allocated memory is still 58.7 MB. Free memory was 34.5 MB in the beginning and 31.1 MB in the end (delta: 3.4 MB). Peak memory consumption was 7.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3142.39 ms. Allocated memory was 58.7 MB in the beginning and 104.9 MB in the end (delta: 46.1 MB). Free memory was 30.7 MB in the beginning and 87.1 MB in the end (delta: -56.3 MB). Peak memory consumption was 28.8 MB. Max. memory is 16.1 GB. * Witness Printer took 58.91 ms. Allocated memory is still 104.9 MB. Free memory was 87.1 MB in the beginning and 84.1 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 93]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 6]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 34 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 3083.4ms, OverallIterations: 14, TraceHistogramMax: 1, EmptinessCheckTime: 29.6ms, AutomataDifference: 1531.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 649 SDtfs, 862 SDslu, 81 SDs, 0 SdLazy, 451 SolverSat, 32 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 736.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 95 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 852.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=393occurred in iteration=13, InterpolantAutomatonStates: 55, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 121.1ms AutomataMinimizationTime, 14 MinimizatonAttempts, 136 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 32.8ms SsaConstructionTime, 128.8ms SatisfiabilityAnalysisTime, 1007.1ms InterpolantComputationTime, 245 NumberOfCodeBlocks, 245 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 231 ConstructedInterpolants, 0 QuantifiedInterpolants, 806 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 0/0 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 - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-27 07:51:18,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...