./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/locks/test_locks_6.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_6.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 8a6bc1adbcafb13db44c5d4b4826990150e2f336 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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 07:51:16,803 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 07:51:16,805 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 07:51:16,834 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 07:51:16,835 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 07:51:16,835 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 07:51:16,836 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 07:51:16,838 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 07:51:16,839 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 07:51:16,840 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 07:51:16,840 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 07:51:16,841 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 07:51:16,841 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 07:51:16,842 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 07:51:16,856 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 07:51:16,857 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 07:51:16,857 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 07:51:16,858 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 07:51:16,859 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 07:51:16,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 07:51:16,861 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 07:51:16,862 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 07:51:16,863 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 07:51:16,863 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 07:51:16,865 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 07:51:16,865 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 07:51:16,866 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 07:51:16,866 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 07:51:16,867 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 07:51:16,867 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 07:51:16,867 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 07:51:16,868 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 07:51:16,868 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 07:51:16,869 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 07:51:16,870 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 07:51:16,870 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 07:51:16,870 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 07:51:16,871 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 07:51:16,871 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 07:51:16,871 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 07:51:16,872 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 07:51:16,885 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-27 07:51:16,900 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 07:51:16,900 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 07:51:16,900 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 07:51:16,900 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 07:51:16,901 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 07:51:16,901 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 07:51:16,901 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 07:51:16,902 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 07:51:16,902 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 07:51:16,902 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 07:51:16,902 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 07:51:16,902 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 07:51:16,902 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 07:51:16,903 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 07:51:16,903 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 07:51:16,903 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 07:51:16,903 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 07:51:16,903 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 07:51:16,910 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 07:51:16,910 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 07:51:16,910 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 07:51:16,910 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 07:51:16,911 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 07:51:16,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 07:51:16,911 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 07:51:16,911 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 07:51:16,911 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 07:51:16,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 07:51:16,912 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 07:51:16,912 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8a6bc1adbcafb13db44c5d4b4826990150e2f336 [2021-08-27 07:51:17,146 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 07:51:17,166 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 07:51:17,168 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 07:51:17,169 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 07:51:17,170 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 07:51:17,171 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/locks/test_locks_6.c [2021-08-27 07:51:17,210 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/025e92fad/743028fff45f44dd8d054fdcefa8a3a1/FLAG1beb64b4f [2021-08-27 07:51:17,533 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 07:51:17,534 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_6.c [2021-08-27 07:51:17,540 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/025e92fad/743028fff45f44dd8d054fdcefa8a3a1/FLAG1beb64b4f [2021-08-27 07:51:17,956 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/025e92fad/743028fff45f44dd8d054fdcefa8a3a1 [2021-08-27 07:51:17,961 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 07:51:17,962 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 07:51:17,963 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 07:51:17,963 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 07:51:17,973 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 07:51:17,974 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 07:51:17" (1/1) ... [2021-08-27 07:51:17,975 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5909e132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:51:17, skipping insertion in model container [2021-08-27 07:51:17,975 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 07:51:17" (1/1) ... [2021-08-27 07:51:17,979 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 07:51:17,998 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 07:51:18,093 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_6.c[2544,2557] [2021-08-27 07:51:18,095 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 07:51:18,100 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 07:51:18,111 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_6.c[2544,2557] [2021-08-27 07:51:18,112 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 07:51:18,124 INFO L208 MainTranslator]: Completed translation [2021-08-27 07:51:18,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:51:18 WrapperNode [2021-08-27 07:51:18,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 07:51:18,125 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 07:51:18,125 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 07:51:18,135 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 07:51:18,150 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:51:18" (1/1) ... [2021-08-27 07:51:18,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:51:18" (1/1) ... [2021-08-27 07:51:18,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:51:18" (1/1) ... [2021-08-27 07:51:18,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:51:18" (1/1) ... [2021-08-27 07:51:18,173 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:51:18" (1/1) ... [2021-08-27 07:51:18,177 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:51:18" (1/1) ... [2021-08-27 07:51:18,180 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:51:18" (1/1) ... [2021-08-27 07:51:18,185 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 07:51:18,188 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 07:51:18,188 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 07:51:18,188 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 07:51:18,188 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:51:18" (1/1) ... [2021-08-27 07:51:18,193 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 07:51:18,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:51:18,226 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 07:51:18,251 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 07:51:18,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 07:51:18,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 07:51:18,283 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-27 07:51:18,283 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 07:51:18,283 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 07:51:18,284 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-27 07:51:18,284 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-27 07:51:18,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 07:51:18,284 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-27 07:51:18,285 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 07:51:18,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 07:51:18,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-27 07:51:18,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 07:51:18,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-27 07:51:18,286 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-27 07:51:18,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 07:51:18,482 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 07:51:18,482 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-08-27 07:51:18,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 07:51:18 BoogieIcfgContainer [2021-08-27 07:51:18,484 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 07:51:18,485 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 07:51:18,485 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 07:51:18,487 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 07:51:18,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 07:51:17" (1/3) ... [2021-08-27 07:51:18,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@767cb775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 07:51:18, skipping insertion in model container [2021-08-27 07:51:18,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:51:18" (2/3) ... [2021-08-27 07:51:18,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@767cb775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 07:51:18, skipping insertion in model container [2021-08-27 07:51:18,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 07:51:18" (3/3) ... [2021-08-27 07:51:18,489 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_6.c [2021-08-27 07:51:18,492 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 07:51:18,492 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-08-27 07:51:18,525 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 07:51:18,529 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 07:51:18,529 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-27 07:51:18,552 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 29 states have internal predecessors, (50), 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 07:51:18,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-27 07:51:18,569 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:51:18,569 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:51:18,570 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-08-27 07:51:18,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:51:18,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1067342593, now seen corresponding path program 1 times [2021-08-27 07:51:18,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:51:18,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746532059] [2021-08-27 07:51:18,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:51:18,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:51:18,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:18,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:51:18,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:18,773 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 07:51:18,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:51:18,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746532059] [2021-08-27 07:51:18,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746532059] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:51:18,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:51:18,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 07:51:18,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480281990] [2021-08-27 07:51:18,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-27 07:51:18,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:51:18,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-27 07:51:18,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 07:51:18,800 INFO L87 Difference]: Start difference. First operand has 34 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 29 states have internal predecessors, (50), 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 07:51:18,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:51:18,824 INFO L93 Difference]: Finished difference Result 33 states and 50 transitions. [2021-08-27 07:51:18,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-27 07:51:18,826 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 07:51:18,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:51:18,831 INFO L225 Difference]: With dead ends: 33 [2021-08-27 07:51:18,832 INFO L226 Difference]: Without dead ends: 28 [2021-08-27 07:51:18,833 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 07:51:18,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-08-27 07:51:18,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-08-27 07:51:18,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 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 07:51:18,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 45 transitions. [2021-08-27 07:51:18,858 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 45 transitions. Word has length 9 [2021-08-27 07:51:18,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:51:18,858 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 45 transitions. [2021-08-27 07:51:18,859 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 07:51:18,859 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 45 transitions. [2021-08-27 07:51:18,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-27 07:51:18,860 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:51:18,860 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 07:51:18,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 07:51:18,860 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-08-27 07:51:18,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:51:18,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1993066942, now seen corresponding path program 1 times [2021-08-27 07:51:18,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:51:18,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568419202] [2021-08-27 07:51:18,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:51:18,862 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:51:18,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:18,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:51:18,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:18,974 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 07:51:18,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:51:18,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568419202] [2021-08-27 07:51:18,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568419202] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:51:18,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:51:18,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 07:51:18,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56842139] [2021-08-27 07:51:18,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 07:51:18,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:51:18,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 07:51:18,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:51:18,978 INFO L87 Difference]: Start difference. First operand 28 states and 45 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 07:51:19,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:51:19,076 INFO L93 Difference]: Finished difference Result 49 states and 81 transitions. [2021-08-27 07:51:19,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 07:51:19,077 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 07:51:19,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:51:19,078 INFO L225 Difference]: With dead ends: 49 [2021-08-27 07:51:19,078 INFO L226 Difference]: Without dead ends: 49 [2021-08-27 07:51:19,078 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 07:51:19,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-27 07:51:19,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2021-08-27 07:51:19,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 states have internal predecessors, (55), 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 07:51:19,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 58 transitions. [2021-08-27 07:51:19,082 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 58 transitions. Word has length 17 [2021-08-27 07:51:19,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:51:19,083 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 58 transitions. [2021-08-27 07:51:19,083 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 07:51:19,083 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 58 transitions. [2021-08-27 07:51:19,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-27 07:51:19,084 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:51:19,084 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 07:51:19,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 07:51:19,084 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-08-27 07:51:19,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:51:19,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1313008572, now seen corresponding path program 1 times [2021-08-27 07:51:19,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:51:19,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473160782] [2021-08-27 07:51:19,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:51:19,086 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:51:19,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:19,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:51:19,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:19,133 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 07:51:19,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:51:19,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473160782] [2021-08-27 07:51:19,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473160782] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:51:19,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:51:19,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 07:51:19,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65775078] [2021-08-27 07:51:19,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 07:51:19,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:51:19,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 07:51:19,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:51:19,135 INFO L87 Difference]: Start difference. First operand 35 states and 58 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 07:51:19,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:51:19,208 INFO L93 Difference]: Finished difference Result 49 states and 79 transitions. [2021-08-27 07:51:19,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 07:51:19,209 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 07:51:19,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:51:19,210 INFO L225 Difference]: With dead ends: 49 [2021-08-27 07:51:19,210 INFO L226 Difference]: Without dead ends: 49 [2021-08-27 07:51:19,210 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 07:51:19,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-27 07:51:19,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-08-27 07:51:19,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 43 states have (on average 1.744186046511628) internal successors, (75), 43 states have internal predecessors, (75), 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 07:51:19,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 78 transitions. [2021-08-27 07:51:19,218 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 78 transitions. Word has length 17 [2021-08-27 07:51:19,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:51:19,219 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 78 transitions. [2021-08-27 07:51:19,219 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 07:51:19,219 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 78 transitions. [2021-08-27 07:51:19,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-27 07:51:19,219 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:51:19,220 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 07:51:19,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 07:51:19,220 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-08-27 07:51:19,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:51:19,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1655318379, now seen corresponding path program 1 times [2021-08-27 07:51:19,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:51:19,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619634700] [2021-08-27 07:51:19,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:51:19,221 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:51:19,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:19,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:51:19,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:19,262 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 07:51:19,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:51:19,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619634700] [2021-08-27 07:51:19,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619634700] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:51:19,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:51:19,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 07:51:19,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59133237] [2021-08-27 07:51:19,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 07:51:19,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:51:19,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 07:51:19,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:51:19,264 INFO L87 Difference]: Start difference. First operand 47 states and 78 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 07:51:19,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:51:19,331 INFO L93 Difference]: Finished difference Result 52 states and 81 transitions. [2021-08-27 07:51:19,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 07:51:19,332 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 07:51:19,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:51:19,333 INFO L225 Difference]: With dead ends: 52 [2021-08-27 07:51:19,333 INFO L226 Difference]: Without dead ends: 52 [2021-08-27 07:51:19,333 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 07:51:19,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-08-27 07:51:19,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-08-27 07:51:19,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 46 states have (on average 1.673913043478261) internal successors, (77), 46 states have internal predecessors, (77), 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 07:51:19,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 80 transitions. [2021-08-27 07:51:19,336 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 80 transitions. Word has length 18 [2021-08-27 07:51:19,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:51:19,337 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 80 transitions. [2021-08-27 07:51:19,337 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 07:51:19,337 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 80 transitions. [2021-08-27 07:51:19,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-27 07:51:19,338 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:51:19,338 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 07:51:19,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-27 07:51:19,338 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-08-27 07:51:19,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:51:19,339 INFO L82 PathProgramCache]: Analyzing trace with hash -2048345389, now seen corresponding path program 1 times [2021-08-27 07:51:19,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:51:19,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513971641] [2021-08-27 07:51:19,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:51:19,339 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:51:19,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:19,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:51:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:19,382 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 07:51:19,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:51:19,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513971641] [2021-08-27 07:51:19,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513971641] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:51:19,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:51:19,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 07:51:19,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29760315] [2021-08-27 07:51:19,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 07:51:19,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:51:19,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 07:51:19,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:51:19,385 INFO L87 Difference]: Start difference. First operand 50 states and 80 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 07:51:19,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:51:19,455 INFO L93 Difference]: Finished difference Result 89 states and 142 transitions. [2021-08-27 07:51:19,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 07:51:19,456 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 07:51:19,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:51:19,456 INFO L225 Difference]: With dead ends: 89 [2021-08-27 07:51:19,456 INFO L226 Difference]: Without dead ends: 89 [2021-08-27 07:51:19,457 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 07:51:19,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-08-27 07:51:19,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2021-08-27 07:51:19,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 83 states have (on average 1.6626506024096386) internal successors, (138), 83 states have internal predecessors, (138), 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 07:51:19,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 141 transitions. [2021-08-27 07:51:19,461 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 141 transitions. Word has length 18 [2021-08-27 07:51:19,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:51:19,462 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 141 transitions. [2021-08-27 07:51:19,462 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 07:51:19,462 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 141 transitions. [2021-08-27 07:51:19,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-27 07:51:19,463 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:51:19,463 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 07:51:19,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-27 07:51:19,463 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-08-27 07:51:19,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:51:19,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1566563537, now seen corresponding path program 1 times [2021-08-27 07:51:19,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:51:19,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891587342] [2021-08-27 07:51:19,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:51:19,464 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:51:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:19,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:51:19,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:19,500 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 07:51:19,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:51:19,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891587342] [2021-08-27 07:51:19,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891587342] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:51:19,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:51:19,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 07:51:19,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347707597] [2021-08-27 07:51:19,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 07:51:19,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:51:19,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 07:51:19,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:51:19,502 INFO L87 Difference]: Start difference. First operand 87 states and 141 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 07:51:19,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:51:19,564 INFO L93 Difference]: Finished difference Result 109 states and 176 transitions. [2021-08-27 07:51:19,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 07:51:19,565 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 07:51:19,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:51:19,566 INFO L225 Difference]: With dead ends: 109 [2021-08-27 07:51:19,566 INFO L226 Difference]: Without dead ends: 109 [2021-08-27 07:51:19,566 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 07:51:19,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-08-27 07:51:19,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 87. [2021-08-27 07:51:19,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 83 states have (on average 1.6385542168674698) internal successors, (136), 83 states have internal predecessors, (136), 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 07:51:19,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 139 transitions. [2021-08-27 07:51:19,570 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 139 transitions. Word has length 18 [2021-08-27 07:51:19,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:51:19,571 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 139 transitions. [2021-08-27 07:51:19,571 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 07:51:19,571 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 139 transitions. [2021-08-27 07:51:19,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-27 07:51:19,576 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:51:19,576 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 07:51:19,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-27 07:51:19,577 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-08-27 07:51:19,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:51:19,577 INFO L82 PathProgramCache]: Analyzing trace with hash 926017401, now seen corresponding path program 1 times [2021-08-27 07:51:19,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:51:19,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802849052] [2021-08-27 07:51:19,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:51:19,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:51:19,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:19,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:51:19,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:19,613 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 07:51:19,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:51:19,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802849052] [2021-08-27 07:51:19,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802849052] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:51:19,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:51:19,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 07:51:19,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511889616] [2021-08-27 07:51:19,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 07:51:19,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:51:19,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 07:51:19,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:51:19,615 INFO L87 Difference]: Start difference. First operand 87 states and 139 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 07:51:19,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:51:19,678 INFO L93 Difference]: Finished difference Result 153 states and 246 transitions. [2021-08-27 07:51:19,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 07:51:19,679 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 07:51:19,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:51:19,679 INFO L225 Difference]: With dead ends: 153 [2021-08-27 07:51:19,680 INFO L226 Difference]: Without dead ends: 153 [2021-08-27 07:51:19,680 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 07:51:19,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-08-27 07:51:19,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 119. [2021-08-27 07:51:19,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 115 states have (on average 1.617391304347826) internal successors, (186), 115 states have internal predecessors, (186), 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 07:51:19,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 189 transitions. [2021-08-27 07:51:19,684 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 189 transitions. Word has length 19 [2021-08-27 07:51:19,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:51:19,685 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 189 transitions. [2021-08-27 07:51:19,685 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 07:51:19,685 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 189 transitions. [2021-08-27 07:51:19,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-27 07:51:19,686 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:51:19,686 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 07:51:19,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-27 07:51:19,686 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-08-27 07:51:19,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:51:19,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1606075771, now seen corresponding path program 1 times [2021-08-27 07:51:19,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:51:19,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926349344] [2021-08-27 07:51:19,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:51:19,687 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:51:19,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:19,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:51:19,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:19,720 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 07:51:19,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:51:19,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926349344] [2021-08-27 07:51:19,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926349344] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:51:19,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:51:19,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 07:51:19,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541910802] [2021-08-27 07:51:19,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 07:51:19,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:51:19,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 07:51:19,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:51:19,722 INFO L87 Difference]: Start difference. First operand 119 states and 189 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 07:51:19,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:51:19,789 INFO L93 Difference]: Finished difference Result 161 states and 248 transitions. [2021-08-27 07:51:19,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 07:51:19,789 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 07:51:19,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:51:19,790 INFO L225 Difference]: With dead ends: 161 [2021-08-27 07:51:19,790 INFO L226 Difference]: Without dead ends: 161 [2021-08-27 07:51:19,791 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 07:51:19,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-08-27 07:51:19,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2021-08-27 07:51:19,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 155 states have (on average 1.5741935483870968) internal successors, (244), 155 states have internal predecessors, (244), 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 07:51:19,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 247 transitions. [2021-08-27 07:51:19,796 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 247 transitions. Word has length 19 [2021-08-27 07:51:19,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:51:19,796 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 247 transitions. [2021-08-27 07:51:19,796 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 07:51:19,796 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 247 transitions. [2021-08-27 07:51:19,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-27 07:51:19,797 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:51:19,797 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 07:51:19,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-27 07:51:19,798 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-08-27 07:51:19,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:51:19,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1358016280, now seen corresponding path program 1 times [2021-08-27 07:51:19,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:51:19,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865934096] [2021-08-27 07:51:19,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:51:19,799 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:51:19,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:19,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:51:19,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:19,832 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 07:51:19,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:51:19,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865934096] [2021-08-27 07:51:19,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865934096] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:51:19,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:51:19,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 07:51:19,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133989119] [2021-08-27 07:51:19,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 07:51:19,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:51:19,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 07:51:19,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:51:19,834 INFO L87 Difference]: Start difference. First operand 159 states and 247 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 07:51:19,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:51:19,892 INFO L93 Difference]: Finished difference Result 167 states and 252 transitions. [2021-08-27 07:51:19,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 07:51:19,893 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 07:51:19,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:51:19,894 INFO L225 Difference]: With dead ends: 167 [2021-08-27 07:51:19,894 INFO L226 Difference]: Without dead ends: 167 [2021-08-27 07:51:19,894 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 07:51:19,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-08-27 07:51:19,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2021-08-27 07:51:19,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 161 states have (on average 1.5403726708074534) internal successors, (248), 161 states have internal predecessors, (248), 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 07:51:19,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 251 transitions. [2021-08-27 07:51:19,898 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 251 transitions. Word has length 20 [2021-08-27 07:51:19,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:51:19,898 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 251 transitions. [2021-08-27 07:51:19,898 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 07:51:19,898 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 251 transitions. [2021-08-27 07:51:19,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-27 07:51:19,899 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:51:19,899 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 07:51:19,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-27 07:51:19,899 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-08-27 07:51:19,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:51:19,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1751043290, now seen corresponding path program 1 times [2021-08-27 07:51:19,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:51:19,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878625960] [2021-08-27 07:51:19,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:51:19,900 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:51:19,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:19,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:51:19,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:19,932 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 07:51:19,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:51:19,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878625960] [2021-08-27 07:51:19,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878625960] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:51:19,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:51:19,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 07:51:19,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624172128] [2021-08-27 07:51:19,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 07:51:19,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:51:19,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 07:51:19,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:51:19,934 INFO L87 Difference]: Start difference. First operand 165 states and 251 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 07:51:20,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:51:20,006 INFO L93 Difference]: Finished difference Result 283 states and 428 transitions. [2021-08-27 07:51:20,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 07:51:20,007 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 07:51:20,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:51:20,008 INFO L225 Difference]: With dead ends: 283 [2021-08-27 07:51:20,008 INFO L226 Difference]: Without dead ends: 283 [2021-08-27 07:51:20,008 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 07:51:20,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-08-27 07:51:20,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 233. [2021-08-27 07:51:20,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 229 states have (on average 1.502183406113537) internal successors, (344), 229 states have internal predecessors, (344), 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 07:51:20,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 347 transitions. [2021-08-27 07:51:20,013 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 347 transitions. Word has length 20 [2021-08-27 07:51:20,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:51:20,013 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 347 transitions. [2021-08-27 07:51:20,013 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 07:51:20,013 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 347 transitions. [2021-08-27 07:51:20,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-27 07:51:20,014 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:51:20,014 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 07:51:20,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-27 07:51:20,015 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-08-27 07:51:20,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:51:20,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1070984920, now seen corresponding path program 1 times [2021-08-27 07:51:20,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:51:20,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724928410] [2021-08-27 07:51:20,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:51:20,016 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:51:20,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:20,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:51:20,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:20,062 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 07:51:20,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:51:20,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724928410] [2021-08-27 07:51:20,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724928410] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:51:20,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:51:20,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 07:51:20,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621457661] [2021-08-27 07:51:20,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 07:51:20,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:51:20,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 07:51:20,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:51:20,064 INFO L87 Difference]: Start difference. First operand 233 states and 347 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 07:51:20,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:51:20,122 INFO L93 Difference]: Finished difference Result 307 states and 440 transitions. [2021-08-27 07:51:20,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 07:51:20,122 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 07:51:20,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:51:20,123 INFO L225 Difference]: With dead ends: 307 [2021-08-27 07:51:20,123 INFO L226 Difference]: Without dead ends: 307 [2021-08-27 07:51:20,124 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 07:51:20,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-08-27 07:51:20,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 305. [2021-08-27 07:51:20,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 301 states have (on average 1.4485049833887043) internal successors, (436), 301 states have internal predecessors, (436), 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 07:51:20,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 439 transitions. [2021-08-27 07:51:20,128 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 439 transitions. Word has length 20 [2021-08-27 07:51:20,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:51:20,128 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 439 transitions. [2021-08-27 07:51:20,128 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 07:51:20,128 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 439 transitions. [2021-08-27 07:51:20,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 07:51:20,129 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:51:20,129 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, 1] [2021-08-27 07:51:20,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-27 07:51:20,130 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-08-27 07:51:20,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:51:20,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1552448560, now seen corresponding path program 1 times [2021-08-27 07:51:20,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:51:20,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151022308] [2021-08-27 07:51:20,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:51:20,130 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:51:20,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:20,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:51:20,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:20,162 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 07:51:20,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:51:20,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151022308] [2021-08-27 07:51:20,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151022308] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:51:20,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:51:20,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 07:51:20,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647187701] [2021-08-27 07:51:20,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 07:51:20,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:51:20,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 07:51:20,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:51:20,164 INFO L87 Difference]: Start difference. First operand 305 states and 439 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 07:51:20,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:51:20,233 INFO L93 Difference]: Finished difference Result 315 states and 440 transitions. [2021-08-27 07:51:20,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 07:51:20,233 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 21 [2021-08-27 07:51:20,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:51:20,234 INFO L225 Difference]: With dead ends: 315 [2021-08-27 07:51:20,235 INFO L226 Difference]: Without dead ends: 315 [2021-08-27 07:51:20,235 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 07:51:20,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-08-27 07:51:20,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 313. [2021-08-27 07:51:20,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 309 states have (on average 1.4110032362459546) internal successors, (436), 309 states have internal predecessors, (436), 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 07:51:20,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 439 transitions. [2021-08-27 07:51:20,240 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 439 transitions. Word has length 21 [2021-08-27 07:51:20,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:51:20,240 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 439 transitions. [2021-08-27 07:51:20,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 07:51:20,241 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 439 transitions. [2021-08-27 07:51:20,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 07:51:20,241 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:51:20,241 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, 1] [2021-08-27 07:51:20,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-27 07:51:20,242 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-08-27 07:51:20,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:51:20,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1159421550, now seen corresponding path program 1 times [2021-08-27 07:51:20,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:51:20,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593652844] [2021-08-27 07:51:20,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:51:20,243 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:51:20,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:20,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:51:20,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:20,274 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 07:51:20,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:51:20,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593652844] [2021-08-27 07:51:20,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593652844] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:51:20,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:51:20,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 07:51:20,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215099919] [2021-08-27 07:51:20,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 07:51:20,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:51:20,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 07:51:20,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:51:20,275 INFO L87 Difference]: Start difference. First operand 313 states and 439 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 07:51:20,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:51:20,331 INFO L93 Difference]: Finished difference Result 523 states and 720 transitions. [2021-08-27 07:51:20,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 07:51:20,332 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 21 [2021-08-27 07:51:20,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:51:20,333 INFO L225 Difference]: With dead ends: 523 [2021-08-27 07:51:20,333 INFO L226 Difference]: Without dead ends: 523 [2021-08-27 07:51:20,334 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 07:51:20,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-08-27 07:51:20,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 457. [2021-08-27 07:51:20,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 453 states have (on average 1.3686534216335542) internal successors, (620), 453 states have internal predecessors, (620), 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 07:51:20,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 623 transitions. [2021-08-27 07:51:20,340 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 623 transitions. Word has length 21 [2021-08-27 07:51:20,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:51:20,340 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 623 transitions. [2021-08-27 07:51:20,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 07:51:20,340 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 623 transitions. [2021-08-27 07:51:20,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 07:51:20,341 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:51:20,341 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, 1] [2021-08-27 07:51:20,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-27 07:51:20,341 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-08-27 07:51:20,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:51:20,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1839479920, now seen corresponding path program 1 times [2021-08-27 07:51:20,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:51:20,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250735228] [2021-08-27 07:51:20,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:51:20,342 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:51:20,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:20,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:51:20,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:20,371 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 07:51:20,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:51:20,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250735228] [2021-08-27 07:51:20,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250735228] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:51:20,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:51:20,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 07:51:20,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446579335] [2021-08-27 07:51:20,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 07:51:20,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:51:20,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 07:51:20,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:51:20,373 INFO L87 Difference]: Start difference. First operand 457 states and 623 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 07:51:20,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:51:20,455 INFO L93 Difference]: Finished difference Result 587 states and 760 transitions. [2021-08-27 07:51:20,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 07:51:20,455 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 21 [2021-08-27 07:51:20,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:51:20,457 INFO L225 Difference]: With dead ends: 587 [2021-08-27 07:51:20,457 INFO L226 Difference]: Without dead ends: 587 [2021-08-27 07:51:20,457 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 07:51:20,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-08-27 07:51:20,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 585. [2021-08-27 07:51:20,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 581 states have (on average 1.3012048192771084) internal successors, (756), 581 states have internal predecessors, (756), 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 07:51:20,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 759 transitions. [2021-08-27 07:51:20,464 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 759 transitions. Word has length 21 [2021-08-27 07:51:20,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:51:20,464 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 759 transitions. [2021-08-27 07:51:20,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 07:51:20,465 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 759 transitions. [2021-08-27 07:51:20,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-27 07:51:20,465 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:51:20,466 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, 1, 1] [2021-08-27 07:51:20,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-27 07:51:20,466 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-08-27 07:51:20,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:51:20,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1582545725, now seen corresponding path program 1 times [2021-08-27 07:51:20,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:51:20,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481361596] [2021-08-27 07:51:20,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:51:20,467 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:51:20,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:20,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:51:20,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:20,496 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 07:51:20,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:51:20,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481361596] [2021-08-27 07:51:20,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481361596] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:51:20,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:51:20,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 07:51:20,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116401778] [2021-08-27 07:51:20,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 07:51:20,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:51:20,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 07:51:20,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:51:20,498 INFO L87 Difference]: Start difference. First operand 585 states and 759 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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 07:51:20,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:51:20,553 INFO L93 Difference]: Finished difference Result 603 states and 760 transitions. [2021-08-27 07:51:20,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 07:51:20,554 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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 22 [2021-08-27 07:51:20,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:51:20,555 INFO L225 Difference]: With dead ends: 603 [2021-08-27 07:51:20,555 INFO L226 Difference]: Without dead ends: 603 [2021-08-27 07:51:20,556 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 07:51:20,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-08-27 07:51:20,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 601. [2021-08-27 07:51:20,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 597 states have (on average 1.2663316582914572) internal successors, (756), 597 states have internal predecessors, (756), 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 07:51:20,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 759 transitions. [2021-08-27 07:51:20,563 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 759 transitions. Word has length 22 [2021-08-27 07:51:20,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:51:20,563 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 759 transitions. [2021-08-27 07:51:20,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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 07:51:20,563 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 759 transitions. [2021-08-27 07:51:20,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-27 07:51:20,564 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:51:20,564 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, 1, 1] [2021-08-27 07:51:20,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-27 07:51:20,564 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-08-27 07:51:20,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:51:20,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1189518715, now seen corresponding path program 1 times [2021-08-27 07:51:20,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:51:20,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913361753] [2021-08-27 07:51:20,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:51:20,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:51:20,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:20,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:51:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:20,595 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 07:51:20,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:51:20,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913361753] [2021-08-27 07:51:20,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913361753] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:51:20,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:51:20,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 07:51:20,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996455986] [2021-08-27 07:51:20,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 07:51:20,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:51:20,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 07:51:20,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:51:20,596 INFO L87 Difference]: Start difference. First operand 601 states and 759 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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 07:51:20,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:51:20,663 INFO L93 Difference]: Finished difference Result 969 states and 1175 transitions. [2021-08-27 07:51:20,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 07:51:20,664 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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 22 [2021-08-27 07:51:20,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:51:20,666 INFO L225 Difference]: With dead ends: 969 [2021-08-27 07:51:20,666 INFO L226 Difference]: Without dead ends: 969 [2021-08-27 07:51:20,667 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 07:51:20,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2021-08-27 07:51:20,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 905. [2021-08-27 07:51:20,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 901 states have (on average 1.2297447280799112) internal successors, (1108), 901 states have internal predecessors, (1108), 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 07:51:20,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1111 transitions. [2021-08-27 07:51:20,678 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1111 transitions. Word has length 22 [2021-08-27 07:51:20,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:51:20,678 INFO L470 AbstractCegarLoop]: Abstraction has 905 states and 1111 transitions. [2021-08-27 07:51:20,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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 07:51:20,678 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1111 transitions. [2021-08-27 07:51:20,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-27 07:51:20,679 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:51:20,679 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, 1, 1] [2021-08-27 07:51:20,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-27 07:51:20,680 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr1ENSURES_VIOLATIONMEMORY_LEAK] === [2021-08-27 07:51:20,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:51:20,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1869577085, now seen corresponding path program 1 times [2021-08-27 07:51:20,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:51:20,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393461751] [2021-08-27 07:51:20,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:51:20,681 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:51:20,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:20,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:51:20,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:51:20,710 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 07:51:20,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:51:20,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393461751] [2021-08-27 07:51:20,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393461751] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:51:20,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:51:20,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 07:51:20,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76948070] [2021-08-27 07:51:20,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 07:51:20,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:51:20,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 07:51:20,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:51:20,712 INFO L87 Difference]: Start difference. First operand 905 states and 1111 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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 07:51:20,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:51:20,768 INFO L93 Difference]: Finished difference Result 1127 states and 1286 transitions. [2021-08-27 07:51:20,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 07:51:20,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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 22 [2021-08-27 07:51:20,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:51:20,769 INFO L225 Difference]: With dead ends: 1127 [2021-08-27 07:51:20,769 INFO L226 Difference]: Without dead ends: 0 [2021-08-27 07:51:20,769 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 07:51:20,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-27 07:51:20,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-27 07:51:20,770 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 07:51:20,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-27 07:51:20,770 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2021-08-27 07:51:20,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:51:20,770 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 07:51:20,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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 07:51:20,770 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-27 07:51:20,770 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-27 07:51:20,772 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONMEMORY_LEAK [2021-08-27 07:51:20,773 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 07:51:20,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-27 07:51:20,776 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 07:51:20,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 07:51:20 BoogieIcfgContainer [2021-08-27 07:51:20,777 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 07:51:20,778 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 07:51:20,778 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 07:51:20,778 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 07:51:20,778 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 07:51:18" (3/4) ... [2021-08-27 07:51:20,780 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-27 07:51:20,784 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2021-08-27 07:51:20,784 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-08-27 07:51:20,784 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-08-27 07:51:20,787 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-08-27 07:51:20,787 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-27 07:51:20,787 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-08-27 07:51:20,787 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-27 07:51:20,808 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 07:51:20,808 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 07:51:20,809 INFO L168 Benchmark]: Toolchain (without parser) took 2846.62 ms. Allocated memory was 56.6 MB in the beginning and 111.1 MB in the end (delta: 54.5 MB). Free memory was 35.7 MB in the beginning and 39.1 MB in the end (delta: -3.4 MB). Peak memory consumption was 50.2 MB. Max. memory is 16.1 GB. [2021-08-27 07:51:20,809 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 56.6 MB. Free memory was 38.7 MB in the beginning and 38.6 MB in the end (delta: 39.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 07:51:20,809 INFO L168 Benchmark]: CACSL2BoogieTranslator took 161.99 ms. Allocated memory is still 56.6 MB. Free memory was 35.5 MB in the beginning and 40.8 MB in the end (delta: -5.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-27 07:51:20,810 INFO L168 Benchmark]: Boogie Preprocessor took 61.78 ms. Allocated memory is still 56.6 MB. Free memory was 40.8 MB in the beginning and 39.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 07:51:20,810 INFO L168 Benchmark]: RCFGBuilder took 295.98 ms. Allocated memory was 56.6 MB in the beginning and 75.5 MB in the end (delta: 18.9 MB). Free memory was 39.2 MB in the beginning and 54.0 MB in the end (delta: -14.8 MB). Peak memory consumption was 15.8 MB. Max. memory is 16.1 GB. [2021-08-27 07:51:20,810 INFO L168 Benchmark]: TraceAbstraction took 2292.38 ms. Allocated memory was 75.5 MB in the beginning and 111.1 MB in the end (delta: 35.7 MB). Free memory was 53.7 MB in the beginning and 42.3 MB in the end (delta: 11.5 MB). Peak memory consumption was 45.9 MB. Max. memory is 16.1 GB. [2021-08-27 07:51:20,810 INFO L168 Benchmark]: Witness Printer took 30.43 ms. Allocated memory is still 111.1 MB. Free memory was 42.3 MB in the beginning and 39.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 07:51:20,811 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 56.6 MB. Free memory was 38.7 MB in the beginning and 38.6 MB in the end (delta: 39.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 161.99 ms. Allocated memory is still 56.6 MB. Free memory was 35.5 MB in the beginning and 40.8 MB in the end (delta: -5.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 61.78 ms. Allocated memory is still 56.6 MB. Free memory was 40.8 MB in the beginning and 39.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 295.98 ms. Allocated memory was 56.6 MB in the beginning and 75.5 MB in the end (delta: 18.9 MB). Free memory was 39.2 MB in the beginning and 54.0 MB in the end (delta: -14.8 MB). Peak memory consumption was 15.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2292.38 ms. Allocated memory was 75.5 MB in the beginning and 111.1 MB in the end (delta: 35.7 MB). Free memory was 53.7 MB in the beginning and 42.3 MB in the end (delta: 11.5 MB). Peak memory consumption was 45.9 MB. Max. memory is 16.1 GB. * Witness Printer took 30.43 ms. Allocated memory is still 111.1 MB. Free memory was 42.3 MB in the beginning and 39.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 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: 107]: 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, 37 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 2259.9ms, OverallIterations: 17, TraceHistogramMax: 1, EmptinessCheckTime: 48.0ms, AutomataDifference: 1159.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 918 SDtfs, 1261 SDslu, 99 SDs, 0 SdLazy, 642 SolverSat, 39 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 613.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 116 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 553.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=905occurred in iteration=16, InterpolantAutomatonStates: 67, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 98.1ms AutomataMinimizationTime, 17 MinimizatonAttempts, 268 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 23.2ms SsaConstructionTime, 91.3ms SatisfiabilityAnalysisTime, 637.2ms InterpolantComputationTime, 324 NumberOfCodeBlocks, 324 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 307 ConstructedInterpolants, 0 QuantifiedInterpolants, 1045 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 17 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 07:51:20,849 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...