./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../sv-benchmarks/c/list-properties/simple-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 5fbdf5bf 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/list-properties/simple-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-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-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash af4b28e958de4f654443dbaa4f0a24d91f735460 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-memcleanup) --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-30 16:03:41,112 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-30 16:03:41,115 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-30 16:03:41,150 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-30 16:03:41,151 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-30 16:03:41,153 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-30 16:03:41,155 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-30 16:03:41,158 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-30 16:03:41,160 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-30 16:03:41,164 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-30 16:03:41,164 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-30 16:03:41,167 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-30 16:03:41,168 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-30 16:03:41,169 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-30 16:03:41,171 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-30 16:03:41,177 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-30 16:03:41,178 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-30 16:03:41,178 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-30 16:03:41,180 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-30 16:03:41,184 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-30 16:03:41,185 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-30 16:03:41,186 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-30 16:03:41,187 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-30 16:03:41,188 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-30 16:03:41,193 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-30 16:03:41,193 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-30 16:03:41,193 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-30 16:03:41,195 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-30 16:03:41,195 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-30 16:03:41,196 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-30 16:03:41,196 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-30 16:03:41,196 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-30 16:03:41,198 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-30 16:03:41,198 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-30 16:03:41,199 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-30 16:03:41,199 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-30 16:03:41,200 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-30 16:03:41,200 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-30 16:03:41,200 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-30 16:03:41,201 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-30 16:03:41,202 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-30 16:03:41,203 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2021-08-30 16:03:41,243 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-30 16:03:41,243 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-30 16:03:41,244 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-30 16:03:41,244 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-30 16:03:41,246 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-30 16:03:41,246 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-30 16:03:41,246 INFO L138 SettingsManager]: * Use SBE=true [2021-08-30 16:03:41,246 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-30 16:03:41,246 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-30 16:03:41,246 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-30 16:03:41,247 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-30 16:03:41,247 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-30 16:03:41,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-30 16:03:41,247 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-30 16:03:41,248 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-30 16:03:41,248 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-30 16:03:41,248 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-30 16:03:41,248 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-30 16:03:41,248 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-30 16:03:41,248 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-30 16:03:41,248 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-30 16:03:41,249 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-30 16:03:41,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 16:03:41,249 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-30 16:03:41,249 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-30 16:03:41,249 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-30 16:03:41,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-30 16:03:41,249 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-30 16:03:41,250 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af4b28e958de4f654443dbaa4f0a24d91f735460 [2021-08-30 16:03:41,520 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-30 16:03:41,534 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-30 16:03:41,536 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-30 16:03:41,536 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-30 16:03:41,537 INFO L275 PluginConnector]: CDTParser initialized [2021-08-30 16:03:41,538 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/simple-1.i [2021-08-30 16:03:41,592 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a77f5a1c9/21a7646640a54e25b233800f84c12f1b/FLAG4af49a40b [2021-08-30 16:03:42,008 INFO L306 CDTParser]: Found 1 translation units. [2021-08-30 16:03:42,008 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/simple-1.i [2021-08-30 16:03:42,027 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a77f5a1c9/21a7646640a54e25b233800f84c12f1b/FLAG4af49a40b [2021-08-30 16:03:42,036 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a77f5a1c9/21a7646640a54e25b233800f84c12f1b [2021-08-30 16:03:42,038 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-30 16:03:42,039 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-30 16:03:42,040 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-30 16:03:42,044 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-30 16:03:42,046 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-30 16:03:42,047 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:03:42" (1/1) ... [2021-08-30 16:03:42,047 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e56926b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:03:42, skipping insertion in model container [2021-08-30 16:03:42,048 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:03:42" (1/1) ... [2021-08-30 16:03:42,052 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-30 16:03:42,073 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-30 16:03:42,305 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/list-properties/simple-1.i[23237,23250] [2021-08-30 16:03:42,309 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 16:03:42,316 INFO L203 MainTranslator]: Completed pre-run [2021-08-30 16:03:42,349 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/list-properties/simple-1.i[23237,23250] [2021-08-30 16:03:42,350 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 16:03:42,366 INFO L208 MainTranslator]: Completed translation [2021-08-30 16:03:42,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:03:42 WrapperNode [2021-08-30 16:03:42,367 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-30 16:03:42,368 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-30 16:03:42,368 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-30 16:03:42,368 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-30 16:03:42,375 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:03:42" (1/1) ... [2021-08-30 16:03:42,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:03:42" (1/1) ... [2021-08-30 16:03:42,383 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:03:42" (1/1) ... [2021-08-30 16:03:42,384 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:03:42" (1/1) ... [2021-08-30 16:03:42,392 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:03:42" (1/1) ... [2021-08-30 16:03:42,395 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:03:42" (1/1) ... [2021-08-30 16:03:42,397 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:03:42" (1/1) ... [2021-08-30 16:03:42,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-30 16:03:42,400 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-30 16:03:42,401 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-30 16:03:42,401 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-30 16:03:42,401 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:03:42" (1/1) ... [2021-08-30 16:03:42,408 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 16:03:42,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:03:42,431 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) [2021-08-30 16:03:42,437 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 [2021-08-30 16:03:42,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-30 16:03:42,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-30 16:03:42,465 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-30 16:03:42,465 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-30 16:03:42,465 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-30 16:03:42,465 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-30 16:03:42,466 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-30 16:03:42,466 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-30 16:03:42,466 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-08-30 16:03:42,466 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-30 16:03:42,466 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-30 16:03:42,466 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-30 16:03:42,466 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-08-30 16:03:42,466 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-08-30 16:03:42,467 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-30 16:03:42,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-30 16:03:42,467 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-30 16:03:42,467 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-30 16:03:42,470 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-30 16:03:42,470 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-30 16:03:42,470 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-30 16:03:42,470 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-30 16:03:42,470 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-30 16:03:42,470 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-30 16:03:42,470 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-30 16:03:42,471 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-30 16:03:42,471 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-30 16:03:42,471 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-30 16:03:42,471 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-30 16:03:42,471 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-30 16:03:42,471 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-30 16:03:42,471 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-30 16:03:42,471 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-30 16:03:42,472 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-30 16:03:42,472 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-30 16:03:42,472 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-30 16:03:42,472 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-30 16:03:42,472 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-30 16:03:42,472 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-30 16:03:42,472 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-30 16:03:42,472 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-30 16:03:42,472 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-30 16:03:42,473 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-30 16:03:42,473 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-30 16:03:42,473 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-30 16:03:42,473 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-30 16:03:42,473 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-30 16:03:42,473 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-30 16:03:42,474 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-30 16:03:42,474 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-30 16:03:42,474 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-30 16:03:42,474 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-30 16:03:42,475 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-30 16:03:42,475 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-30 16:03:42,475 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-30 16:03:42,475 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-30 16:03:42,475 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-30 16:03:42,475 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-30 16:03:42,475 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-30 16:03:42,476 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-30 16:03:42,476 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-30 16:03:42,476 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-30 16:03:42,476 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-30 16:03:42,476 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-30 16:03:42,477 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-30 16:03:42,477 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-30 16:03:42,477 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-30 16:03:42,478 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-30 16:03:42,478 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-30 16:03:42,478 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-30 16:03:42,478 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-30 16:03:42,478 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-30 16:03:42,478 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-30 16:03:42,479 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-30 16:03:42,479 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-30 16:03:42,479 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-30 16:03:42,479 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-30 16:03:42,480 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-30 16:03:42,480 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-30 16:03:42,481 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-30 16:03:42,481 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-30 16:03:42,481 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-30 16:03:42,481 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-30 16:03:42,481 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-30 16:03:42,481 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-30 16:03:42,481 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-30 16:03:42,481 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-30 16:03:42,481 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-30 16:03:42,482 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-30 16:03:42,482 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-30 16:03:42,482 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-30 16:03:42,482 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-30 16:03:42,482 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-30 16:03:42,482 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-30 16:03:42,489 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-30 16:03:42,489 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-30 16:03:42,489 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-30 16:03:42,489 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-30 16:03:42,489 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-30 16:03:42,489 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-30 16:03:42,489 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-30 16:03:42,490 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-30 16:03:42,490 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-30 16:03:42,490 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-30 16:03:42,490 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-30 16:03:42,490 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-30 16:03:42,491 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-30 16:03:42,491 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-30 16:03:42,491 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-30 16:03:42,491 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-30 16:03:42,491 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-30 16:03:42,492 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-30 16:03:42,492 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-30 16:03:42,492 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-30 16:03:42,492 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-30 16:03:42,492 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-30 16:03:42,492 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-30 16:03:42,493 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-30 16:03:42,493 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-30 16:03:42,493 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-30 16:03:42,493 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-30 16:03:42,493 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-30 16:03:42,493 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-30 16:03:42,493 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-08-30 16:03:42,494 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-30 16:03:42,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-30 16:03:42,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-30 16:03:42,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-30 16:03:42,495 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-30 16:03:42,497 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-30 16:03:42,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-30 16:03:42,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-30 16:03:42,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-30 16:03:42,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-30 16:03:42,741 INFO L757 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-08-30 16:03:42,831 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-30 16:03:42,831 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-30 16:03:42,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:03:42 BoogieIcfgContainer [2021-08-30 16:03:42,836 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-30 16:03:42,838 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-30 16:03:42,838 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-30 16:03:42,840 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-30 16:03:42,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:03:42" (1/3) ... [2021-08-30 16:03:42,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26050f21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:03:42, skipping insertion in model container [2021-08-30 16:03:42,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:03:42" (2/3) ... [2021-08-30 16:03:42,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26050f21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:03:42, skipping insertion in model container [2021-08-30 16:03:42,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:03:42" (3/3) ... [2021-08-30 16:03:42,843 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-1.i [2021-08-30 16:03:42,847 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-30 16:03:42,848 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2021-08-30 16:03:42,885 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-30 16:03:42,891 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 [2021-08-30 16:03:42,891 INFO L340 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2021-08-30 16:03:42,907 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 47 states have internal predecessors, (53), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 16:03:42,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-30 16:03:42,913 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:03:42,914 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:03:42,914 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 13 more)] === [2021-08-30 16:03:42,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:03:42,922 INFO L82 PathProgramCache]: Analyzing trace with hash -733404871, now seen corresponding path program 1 times [2021-08-30 16:03:42,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:03:42,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831344633] [2021-08-30 16:03:42,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:03:42,932 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:03:43,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:03:43,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:03:43,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:03:43,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:03:43,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:03:43,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831344633] [2021-08-30 16:03:43,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831344633] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:03:43,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:03:43,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 16:03:43,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687583203] [2021-08-30 16:03:43,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 16:03:43,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:03:43,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 16:03:43,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 16:03:43,206 INFO L87 Difference]: Start difference. First operand has 53 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 47 states have internal predecessors, (53), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2021-08-30 16:03:43,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:03:43,337 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2021-08-30 16:03:43,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 16:03:43,340 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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 [2021-08-30 16:03:43,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:03:43,347 INFO L225 Difference]: With dead ends: 52 [2021-08-30 16:03:43,347 INFO L226 Difference]: Without dead ends: 45 [2021-08-30 16:03:43,349 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.19ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 16:03:43,352 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 42 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 80.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.43ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 101.60ms IncrementalHoareTripleChecker+Time [2021-08-30 16:03:43,353 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 11 Invalid, 108 Unknown, 0 Unchecked, 4.43ms Time], IncrementalHoareTripleChecker [4 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 101.60ms Time] [2021-08-30 16:03:43,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-08-30 16:03:43,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-08-30 16:03:43,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 25 states have (on average 1.72) internal successors, (43), 41 states have internal predecessors, (43), 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) [2021-08-30 16:03:43,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-08-30 16:03:43,380 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 9 [2021-08-30 16:03:43,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:03:43,380 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-08-30 16:03:43,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2021-08-30 16:03:43,381 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-08-30 16:03:43,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-30 16:03:43,381 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:03:43,381 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:03:43,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-30 16:03:43,383 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 13 more)] === [2021-08-30 16:03:43,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:03:43,386 INFO L82 PathProgramCache]: Analyzing trace with hash -733404870, now seen corresponding path program 1 times [2021-08-30 16:03:43,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:03:43,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665669737] [2021-08-30 16:03:43,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:03:43,387 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:03:43,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:03:43,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:03:43,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:03:43,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:03:43,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:03:43,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665669737] [2021-08-30 16:03:43,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665669737] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:03:43,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:03:43,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 16:03:43,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227667546] [2021-08-30 16:03:43,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 16:03:43,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:03:43,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 16:03:43,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 16:03:43,490 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2021-08-30 16:03:43,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:03:43,576 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-08-30 16:03:43,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 16:03:43,576 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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 [2021-08-30 16:03:43,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:03:43,577 INFO L225 Difference]: With dead ends: 44 [2021-08-30 16:03:43,577 INFO L226 Difference]: Without dead ends: 44 [2021-08-30 16:03:43,577 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.50ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 16:03:43,578 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 36 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.11ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 73.17ms IncrementalHoareTripleChecker+Time [2021-08-30 16:03:43,578 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 7 Invalid, 88 Unknown, 0 Unchecked, 2.11ms Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 73.17ms Time] [2021-08-30 16:03:43,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-08-30 16:03:43,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-08-30 16:03:43,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 25 states have (on average 1.68) internal successors, (42), 40 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) [2021-08-30 16:03:43,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-08-30 16:03:43,582 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 9 [2021-08-30 16:03:43,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:03:43,582 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-08-30 16:03:43,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2021-08-30 16:03:43,582 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-08-30 16:03:43,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-30 16:03:43,582 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:03:43,582 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:03:43,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-30 16:03:43,583 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 13 more)] === [2021-08-30 16:03:43,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:03:43,583 INFO L82 PathProgramCache]: Analyzing trace with hash -365871131, now seen corresponding path program 1 times [2021-08-30 16:03:43,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:03:43,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269896158] [2021-08-30 16:03:43,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:03:43,583 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:03:43,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:03:43,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:03:43,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:03:43,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:03:43,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:03:43,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269896158] [2021-08-30 16:03:43,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269896158] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:03:43,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:03:43,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-30 16:03:43,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287849971] [2021-08-30 16:03:43,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 16:03:43,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:03:43,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 16:03:43,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:03:43,631 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-08-30 16:03:43,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:03:43,754 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2021-08-30 16:03:43,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 16:03:43,755 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 12 [2021-08-30 16:03:43,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:03:43,756 INFO L225 Difference]: With dead ends: 75 [2021-08-30 16:03:43,756 INFO L226 Difference]: Without dead ends: 75 [2021-08-30 16:03:43,758 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.64ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-30 16:03:43,763 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 68 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 81.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.29ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 103.45ms IncrementalHoareTripleChecker+Time [2021-08-30 16:03:43,765 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 10 Invalid, 160 Unknown, 0 Unchecked, 2.29ms Time], IncrementalHoareTripleChecker [20 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 103.45ms Time] [2021-08-30 16:03:43,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-08-30 16:03:43,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 48. [2021-08-30 16:03:43,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 44 states have internal predecessors, (52), 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) [2021-08-30 16:03:43,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2021-08-30 16:03:43,778 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 12 [2021-08-30 16:03:43,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:03:43,779 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2021-08-30 16:03:43,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-08-30 16:03:43,779 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2021-08-30 16:03:43,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-30 16:03:43,780 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:03:43,780 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:03:43,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-30 16:03:43,780 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 13 more)] === [2021-08-30 16:03:43,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:03:43,781 INFO L82 PathProgramCache]: Analyzing trace with hash -365871130, now seen corresponding path program 1 times [2021-08-30 16:03:43,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:03:43,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765621197] [2021-08-30 16:03:43,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:03:43,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:03:43,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:03:43,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:03:43,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:03:43,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:03:43,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:03:43,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765621197] [2021-08-30 16:03:43,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765621197] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:03:43,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:03:43,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-30 16:03:43,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988393484] [2021-08-30 16:03:43,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 16:03:43,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:03:43,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 16:03:43,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:03:43,862 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-08-30 16:03:43,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:03:43,956 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2021-08-30 16:03:43,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 16:03:43,956 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 12 [2021-08-30 16:03:43,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:03:43,957 INFO L225 Difference]: With dead ends: 64 [2021-08-30 16:03:43,957 INFO L226 Difference]: Without dead ends: 64 [2021-08-30 16:03:43,958 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.82ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-30 16:03:43,966 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 70 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.33ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 75.71ms IncrementalHoareTripleChecker+Time [2021-08-30 16:03:43,967 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 10 Invalid, 128 Unknown, 0 Unchecked, 1.33ms Time], IncrementalHoareTripleChecker [13 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 75.71ms Time] [2021-08-30 16:03:43,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-30 16:03:43,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2021-08-30 16:03:43,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 52 states have internal predecessors, (59), 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) [2021-08-30 16:03:43,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2021-08-30 16:03:43,977 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 12 [2021-08-30 16:03:43,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:03:43,977 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2021-08-30 16:03:43,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-08-30 16:03:43,978 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2021-08-30 16:03:43,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-30 16:03:43,978 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:03:43,978 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:03:43,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-30 16:03:43,978 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr17ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 13 more)] === [2021-08-30 16:03:43,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:03:43,978 INFO L82 PathProgramCache]: Analyzing trace with hash -695098105, now seen corresponding path program 1 times [2021-08-30 16:03:43,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:03:43,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314983213] [2021-08-30 16:03:43,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:03:43,979 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:03:43,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:03:44,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:03:44,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:03:44,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:03:44,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:03:44,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314983213] [2021-08-30 16:03:44,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314983213] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:03:44,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:03:44,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 16:03:44,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617760778] [2021-08-30 16:03:44,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 16:03:44,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:03:44,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 16:03:44,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:03:44,053 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 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) [2021-08-30 16:03:44,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:03:44,137 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2021-08-30 16:03:44,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 16:03:44,137 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 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 [2021-08-30 16:03:44,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:03:44,137 INFO L225 Difference]: With dead ends: 61 [2021-08-30 16:03:44,138 INFO L226 Difference]: Without dead ends: 61 [2021-08-30 16:03:44,138 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.34ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-30 16:03:44,138 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 60 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 57.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.21ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 74.39ms IncrementalHoareTripleChecker+Time [2021-08-30 16:03:44,138 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 10 Invalid, 118 Unknown, 0 Unchecked, 1.21ms Time], IncrementalHoareTripleChecker [3 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 74.39ms Time] [2021-08-30 16:03:44,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-08-30 16:03:44,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2021-08-30 16:03:44,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 52 states have internal predecessors, (57), 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) [2021-08-30 16:03:44,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-08-30 16:03:44,141 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 17 [2021-08-30 16:03:44,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:03:44,141 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-08-30 16:03:44,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 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) [2021-08-30 16:03:44,141 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-08-30 16:03:44,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-30 16:03:44,142 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:03:44,142 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:03:44,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-30 16:03:44,142 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr14ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 13 more)] === [2021-08-30 16:03:44,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:03:44,142 INFO L82 PathProgramCache]: Analyzing trace with hash -73163862, now seen corresponding path program 1 times [2021-08-30 16:03:44,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:03:44,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481486195] [2021-08-30 16:03:44,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:03:44,142 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:03:44,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:03:44,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:03:44,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:03:44,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:03:44,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:03:44,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481486195] [2021-08-30 16:03:44,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481486195] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:03:44,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:03:44,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-30 16:03:44,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147670381] [2021-08-30 16:03:44,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 16:03:44,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:03:44,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 16:03:44,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-30 16:03:44,217 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 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) [2021-08-30 16:03:44,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:03:44,375 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2021-08-30 16:03:44,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 16:03:44,375 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 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 [2021-08-30 16:03:44,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:03:44,376 INFO L225 Difference]: With dead ends: 77 [2021-08-30 16:03:44,376 INFO L226 Difference]: Without dead ends: 77 [2021-08-30 16:03:44,377 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 32.79ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-30 16:03:44,377 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 42 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 105.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.07ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 140.91ms IncrementalHoareTripleChecker+Time [2021-08-30 16:03:44,378 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 16 Invalid, 255 Unknown, 0 Unchecked, 2.07ms Time], IncrementalHoareTripleChecker [18 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 140.91ms Time] [2021-08-30 16:03:44,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-08-30 16:03:44,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 57. [2021-08-30 16:03:44,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 42 states have (on average 1.380952380952381) internal successors, (58), 53 states have internal predecessors, (58), 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) [2021-08-30 16:03:44,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2021-08-30 16:03:44,380 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 18 [2021-08-30 16:03:44,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:03:44,381 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2021-08-30 16:03:44,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 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) [2021-08-30 16:03:44,381 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2021-08-30 16:03:44,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-30 16:03:44,381 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:03:44,381 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:03:44,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-30 16:03:44,381 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 13 more)] === [2021-08-30 16:03:44,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:03:44,381 INFO L82 PathProgramCache]: Analyzing trace with hash -159453352, now seen corresponding path program 1 times [2021-08-30 16:03:44,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:03:44,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801209101] [2021-08-30 16:03:44,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:03:44,382 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:03:44,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:03:44,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:03:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:03:44,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:03:44,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:03:44,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801209101] [2021-08-30 16:03:44,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801209101] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:03:44,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:03:44,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-30 16:03:44,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213071581] [2021-08-30 16:03:44,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-30 16:03:44,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:03:44,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-30 16:03:44,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-30 16:03:44,440 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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) [2021-08-30 16:03:44,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:03:44,580 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2021-08-30 16:03:44,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 16:03:44,580 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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 [2021-08-30 16:03:44,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:03:44,581 INFO L225 Difference]: With dead ends: 69 [2021-08-30 16:03:44,581 INFO L226 Difference]: Without dead ends: 69 [2021-08-30 16:03:44,581 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.96ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-30 16:03:44,581 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 44 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 90.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.56ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 112.72ms IncrementalHoareTripleChecker+Time [2021-08-30 16:03:44,582 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 16 Invalid, 282 Unknown, 0 Unchecked, 1.56ms Time], IncrementalHoareTripleChecker [7 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 112.72ms Time] [2021-08-30 16:03:44,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-08-30 16:03:44,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2021-08-30 16:03:44,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 51 states have internal predecessors, (56), 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) [2021-08-30 16:03:44,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2021-08-30 16:03:44,584 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 20 [2021-08-30 16:03:44,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:03:44,584 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2021-08-30 16:03:44,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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) [2021-08-30 16:03:44,584 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2021-08-30 16:03:44,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-30 16:03:44,585 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:03:44,585 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:03:44,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-30 16:03:44,585 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 13 more)] === [2021-08-30 16:03:44,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:03:44,585 INFO L82 PathProgramCache]: Analyzing trace with hash -159453351, now seen corresponding path program 1 times [2021-08-30 16:03:44,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:03:44,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527793485] [2021-08-30 16:03:44,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:03:44,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:03:44,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:03:44,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:03:44,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:03:44,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:03:44,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:03:44,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527793485] [2021-08-30 16:03:44,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527793485] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:03:44,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:03:44,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-30 16:03:44,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727280980] [2021-08-30 16:03:44,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-30 16:03:44,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:03:44,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-30 16:03:44,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-30 16:03:44,661 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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) [2021-08-30 16:03:44,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:03:44,861 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2021-08-30 16:03:44,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-30 16:03:44,862 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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 [2021-08-30 16:03:44,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:03:44,862 INFO L225 Difference]: With dead ends: 65 [2021-08-30 16:03:44,862 INFO L226 Difference]: Without dead ends: 65 [2021-08-30 16:03:44,862 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 83.20ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-30 16:03:44,863 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 30 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 111.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.55ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 136.01ms IncrementalHoareTripleChecker+Time [2021-08-30 16:03:44,863 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 16 Invalid, 295 Unknown, 0 Unchecked, 1.55ms Time], IncrementalHoareTripleChecker [7 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 136.01ms Time] [2021-08-30 16:03:44,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-08-30 16:03:44,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 45. [2021-08-30 16:03:44,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 41 states have internal predecessors, (46), 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) [2021-08-30 16:03:44,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-08-30 16:03:44,865 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 20 [2021-08-30 16:03:44,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:03:44,866 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-08-30 16:03:44,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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) [2021-08-30 16:03:44,866 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-08-30 16:03:44,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-30 16:03:44,866 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:03:44,866 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:03:44,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-30 16:03:44,866 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr12REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 13 more)] === [2021-08-30 16:03:44,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:03:44,867 INFO L82 PathProgramCache]: Analyzing trace with hash -2071334378, now seen corresponding path program 1 times [2021-08-30 16:03:44,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:03:44,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937777631] [2021-08-30 16:03:44,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:03:44,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:03:44,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:03:44,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:03:44,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:03:44,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:03:44,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:03:44,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937777631] [2021-08-30 16:03:44,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937777631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:03:44,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48575369] [2021-08-30 16:03:44,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:03:44,983 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:03:44,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:03:44,990 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:03:44,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-30 16:03:45,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:03:45,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-30 16:03:45,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:03:45,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-30 16:03:45,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-30 16:03:45,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-08-30 16:03:45,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-08-30 16:03:45,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:03:45,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:03:45,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 56 [2021-08-30 16:03:45,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 48 [2021-08-30 16:03:45,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:03:45,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48575369] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:03:45,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:03:45,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 17 [2021-08-30 16:03:45,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632390019] [2021-08-30 16:03:45,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-30 16:03:45,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:03:45,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-30 16:03:45,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-08-30 16:03:45,762 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:03:45,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:03:45,950 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2021-08-30 16:03:45,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-30 16:03:45,950 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-08-30 16:03:45,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:03:45,951 INFO L225 Difference]: With dead ends: 61 [2021-08-30 16:03:45,951 INFO L226 Difference]: Without dead ends: 61 [2021-08-30 16:03:45,951 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 225.64ms TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-08-30 16:03:45,952 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 154 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 96.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.50ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 115.99ms IncrementalHoareTripleChecker+Time [2021-08-30 16:03:45,952 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 31 Invalid, 342 Unknown, 0 Unchecked, 2.50ms Time], IncrementalHoareTripleChecker [19 Valid, 272 Invalid, 0 Unknown, 51 Unchecked, 115.99ms Time] [2021-08-30 16:03:45,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-08-30 16:03:45,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 48. [2021-08-30 16:03:45,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 40 states have (on average 1.225) internal successors, (49), 44 states have internal predecessors, (49), 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) [2021-08-30 16:03:45,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-08-30 16:03:45,954 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 21 [2021-08-30 16:03:45,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:03:45,954 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-08-30 16:03:45,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:03:45,954 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-08-30 16:03:45,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-30 16:03:45,954 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:03:45,955 INFO L513 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] [2021-08-30 16:03:45,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-30 16:03:46,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:03:46,172 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr17ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 13 more)] === [2021-08-30 16:03:46,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:03:46,173 INFO L82 PathProgramCache]: Analyzing trace with hash 213142458, now seen corresponding path program 1 times [2021-08-30 16:03:46,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:03:46,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685448928] [2021-08-30 16:03:46,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:03:46,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:03:46,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-30 16:03:46,189 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-30 16:03:46,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-30 16:03:46,219 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-30 16:03:46,219 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-30 16:03:46,219 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr17ENSURES_VIOLATIONMEMORY_LEAK (17 of 18 remaining) [2021-08-30 16:03:46,221 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION (16 of 18 remaining) [2021-08-30 16:03:46,221 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION (15 of 18 remaining) [2021-08-30 16:03:46,221 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION (14 of 18 remaining) [2021-08-30 16:03:46,221 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION (13 of 18 remaining) [2021-08-30 16:03:46,221 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION (12 of 18 remaining) [2021-08-30 16:03:46,222 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION (11 of 18 remaining) [2021-08-30 16:03:46,222 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION (10 of 18 remaining) [2021-08-30 16:03:46,222 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION (9 of 18 remaining) [2021-08-30 16:03:46,222 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION (8 of 18 remaining) [2021-08-30 16:03:46,222 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION (7 of 18 remaining) [2021-08-30 16:03:46,222 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION (6 of 18 remaining) [2021-08-30 16:03:46,222 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION (5 of 18 remaining) [2021-08-30 16:03:46,222 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION (4 of 18 remaining) [2021-08-30 16:03:46,222 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION (3 of 18 remaining) [2021-08-30 16:03:46,223 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14ASSERT_VIOLATIONMEMORY_LEAK (2 of 18 remaining) [2021-08-30 16:03:46,223 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION (1 of 18 remaining) [2021-08-30 16:03:46,223 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION (0 of 18 remaining) [2021-08-30 16:03:46,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-30 16:03:46,227 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-30 16:03:46,233 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-08-30 16:03:46,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 04:03:46 BoogieIcfgContainer [2021-08-30 16:03:46,242 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-30 16:03:46,242 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-30 16:03:46,242 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-30 16:03:46,242 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-30 16:03:46,242 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:03:42" (3/4) ... [2021-08-30 16:03:46,244 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-30 16:03:46,246 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-08-30 16:03:46,265 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-30 16:03:46,265 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-30 16:03:46,265 INFO L158 Benchmark]: Toolchain (without parser) took 4226.82ms. Allocated memory was 58.7MB in the beginning and 88.1MB in the end (delta: 29.4MB). Free memory was 36.4MB in the beginning and 60.4MB in the end (delta: -24.0MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. [2021-08-30 16:03:46,265 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 58.7MB. Free memory was 40.7MB in the beginning and 40.7MB in the end (delta: 50.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 16:03:46,265 INFO L158 Benchmark]: CACSL2BoogieTranslator took 327.69ms. Allocated memory is still 58.7MB. Free memory was 36.2MB in the beginning and 35.7MB in the end (delta: 482.6kB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-08-30 16:03:46,266 INFO L158 Benchmark]: Boogie Preprocessor took 32.26ms. Allocated memory is still 58.7MB. Free memory was 35.7MB in the beginning and 33.2MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-30 16:03:46,266 INFO L158 Benchmark]: RCFGBuilder took 436.16ms. Allocated memory was 58.7MB in the beginning and 73.4MB in the end (delta: 14.7MB). Free memory was 33.2MB in the beginning and 43.5MB in the end (delta: -10.3MB). Peak memory consumption was 12.8MB. Max. memory is 16.1GB. [2021-08-30 16:03:46,266 INFO L158 Benchmark]: TraceAbstraction took 3403.38ms. Allocated memory was 73.4MB in the beginning and 88.1MB in the end (delta: 14.7MB). Free memory was 43.2MB in the beginning and 62.5MB in the end (delta: -19.3MB). Peak memory consumption was 32.7MB. Max. memory is 16.1GB. [2021-08-30 16:03:46,266 INFO L158 Benchmark]: Witness Printer took 22.94ms. Allocated memory is still 88.1MB. Free memory was 62.5MB in the beginning and 60.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-30 16:03:46,267 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 58.7MB. Free memory was 40.7MB in the beginning and 40.7MB in the end (delta: 50.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 327.69ms. Allocated memory is still 58.7MB. Free memory was 36.2MB in the beginning and 35.7MB in the end (delta: 482.6kB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.26ms. Allocated memory is still 58.7MB. Free memory was 35.7MB in the beginning and 33.2MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 436.16ms. Allocated memory was 58.7MB in the beginning and 73.4MB in the end (delta: 14.7MB). Free memory was 33.2MB in the beginning and 43.5MB in the end (delta: -10.3MB). Peak memory consumption was 12.8MB. Max. memory is 16.1GB. * TraceAbstraction took 3403.38ms. Allocated memory was 73.4MB in the beginning and 88.1MB in the end (delta: 14.7MB). Free memory was 43.2MB in the beginning and 62.5MB in the end (delta: -19.3MB). Peak memory consumption was 32.7MB. Max. memory is 16.1GB. * Witness Printer took 22.94ms. Allocated memory is still 88.1MB. Free memory was 62.5MB in the beginning and 60.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 531]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) VAL [a={-1:0}] [L534] List t; [L535] List p = a; VAL [a={-1:0}, p={-1:0}] [L536] a->h = 2 VAL [a={-1:0}, p={-1:0}] [L537] COND FALSE !(__VERIFIER_nondet_int()) [L544] p->h = 2 VAL [a={-1:0}, p={-1:0}] [L545] p->n = 0 VAL [a={-1:0}, p={-1:0}] [L546] p = a VAL [a={-1:0}, p={-1:0}] [L547] COND TRUE p!=0 VAL [a={-1:0}, p={-1:0}] [L548] EXPR p->h VAL [a={-1:0}, p={-1:0}, p->h=2] [L548] COND FALSE !(p->h != 2) [L551] EXPR p->n VAL [a={-1:0}, p={-1:0}, p->n={0:0}] [L551] p = p->n [L547] COND FALSE !(p!=0) VAL [a={-1:0}, p={0:0}] [L553] return 0; VAL [\result=0, a={-1:0}, p={0:0}] - UnprovableResult [Line: 536]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 536]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 72 locations, 18 error locations. Started 1 CEGAR loops. OverallTime: 3342.61ms, OverallIterations: 10, TraceHistogramMax: 2, EmptinessCheckTime: 12.25ms, AutomataDifference: 1289.86ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 12.40ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 546 SdHoareTripleChecker+Valid, 933.95ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 546 mSDsluCounter, 127 SdHoareTripleChecker+Invalid, 745.20ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 51 IncrementalHoareTripleChecker+Unchecked, 474 mSDsCounter, 93 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1632 IncrementalHoareTripleChecker+Invalid, 1776 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 93 mSolverCounterUnsat, 31 mSDtfsCounter, 1632 mSolverCounterSat, 19.05ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 119 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 486.08ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=6, InterpolantAutomatonStates: 59, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 52.92ms AutomataMinimizationTime, 9 MinimizatonAttempts, 107 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 34.00ms SsaConstructionTime, 138.39ms SatisfiabilityAnalysisTime, 1315.35ms InterpolantComputationTime, 181 NumberOfCodeBlocks, 181 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 169 ConstructedInterpolants, 1 QuantifiedInterpolants, 1216 SizeOfPredicates, 10 NumberOfNonLiveVariables, 132 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 11 InterpolantComputations, 8 PerfectInterpolantSequences, 7/10 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-08-30 16:03:46,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...