./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 906a4fb5 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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 0.1.25-906a4fb [2020-10-19 18:26:28,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:26:28,248 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:26:28,274 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:26:28,275 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:26:28,285 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:26:28,287 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:26:28,290 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:26:28,293 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:26:28,296 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:26:28,297 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:26:28,299 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:26:28,301 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:26:28,304 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:26:28,307 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:26:28,308 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:26:28,311 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:26:28,313 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:26:28,316 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:26:28,321 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:26:28,323 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:26:28,325 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:26:28,327 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:26:28,328 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:26:28,339 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:26:28,341 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:26:28,341 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:26:28,344 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:26:28,344 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:26:28,347 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:26:28,347 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:26:28,348 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:26:28,349 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:26:28,350 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:26:28,351 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:26:28,352 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:26:28,353 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:26:28,353 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:26:28,353 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:26:28,355 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:26:28,356 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:26:28,357 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2020-10-19 18:26:28,403 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:26:28,404 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:26:28,406 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:26:28,406 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:26:28,407 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:26:28,407 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:26:28,407 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 18:26:28,407 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:26:28,408 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:26:28,408 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 18:26:28,409 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:26:28,410 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-19 18:26:28,410 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-19 18:26:28,410 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 18:26:28,411 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-19 18:26:28,411 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 18:26:28,412 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:26:28,412 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:26:28,412 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:26:28,412 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 18:26:28,413 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 18:26:28,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 18:26:28,413 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:26:28,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 18:26:28,414 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 18:26:28,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 18:26:28,414 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:26:28,415 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 [2020-10-19 18:26:28,730 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:26:28,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:26:28,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:26:28,748 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:26:28,749 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:26:28,749 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/simple-1.i [2020-10-19 18:26:28,823 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b98ca8c9/ae7a67e41d6647968076ccc2b7133fef/FLAG1f9a9f5e8 [2020-10-19 18:26:29,307 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:26:29,312 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/simple-1.i [2020-10-19 18:26:29,326 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b98ca8c9/ae7a67e41d6647968076ccc2b7133fef/FLAG1f9a9f5e8 [2020-10-19 18:26:29,620 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b98ca8c9/ae7a67e41d6647968076ccc2b7133fef [2020-10-19 18:26:29,624 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:26:29,631 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-19 18:26:29,633 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:26:29,633 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:26:29,637 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:26:29,638 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:26:29" (1/1) ... [2020-10-19 18:26:29,641 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@502097f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:26:29, skipping insertion in model container [2020-10-19 18:26:29,641 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:26:29" (1/1) ... [2020-10-19 18:26:29,649 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:26:29,684 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:26:30,019 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:26:30,093 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:26:30,163 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:26:30,219 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:26:30,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:26:30 WrapperNode [2020-10-19 18:26:30,219 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:26:30,220 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:26:30,220 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:26:30,220 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:26:30,234 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:26:30" (1/1) ... [2020-10-19 18:26:30,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:26:30" (1/1) ... [2020-10-19 18:26:30,249 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:26:30" (1/1) ... [2020-10-19 18:26:30,250 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:26:30" (1/1) ... [2020-10-19 18:26:30,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:26:30" (1/1) ... [2020-10-19 18:26:30,272 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:26:30" (1/1) ... [2020-10-19 18:26:30,275 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:26:30" (1/1) ... [2020-10-19 18:26:30,282 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:26:30,282 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:26:30,282 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:26:30,283 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:26:30,283 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:26:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 18:26:30,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-19 18:26:30,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:26:30,351 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-19 18:26:30,352 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-19 18:26:30,352 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-19 18:26:30,352 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-19 18:26:30,352 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-19 18:26:30,352 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-19 18:26:30,352 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-19 18:26:30,352 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-19 18:26:30,353 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-19 18:26:30,353 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-19 18:26:30,353 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-19 18:26:30,353 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-19 18:26:30,353 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-19 18:26:30,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 18:26:30,354 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-19 18:26:30,354 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-19 18:26:30,354 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-19 18:26:30,354 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-19 18:26:30,354 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-19 18:26:30,354 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-19 18:26:30,355 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-19 18:26:30,355 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-19 18:26:30,355 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-19 18:26:30,355 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-19 18:26:30,355 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-19 18:26:30,355 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-19 18:26:30,356 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-19 18:26:30,356 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-19 18:26:30,356 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-19 18:26:30,356 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-19 18:26:30,356 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-19 18:26:30,356 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-19 18:26:30,356 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-19 18:26:30,357 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-19 18:26:30,357 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-19 18:26:30,357 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-19 18:26:30,357 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-19 18:26:30,357 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-19 18:26:30,357 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-19 18:26:30,357 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-19 18:26:30,358 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-19 18:26:30,358 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-19 18:26:30,358 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-19 18:26:30,358 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-19 18:26:30,358 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-19 18:26:30,358 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-19 18:26:30,358 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-19 18:26:30,358 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-19 18:26:30,359 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-19 18:26:30,359 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-19 18:26:30,359 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-19 18:26:30,359 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-19 18:26:30,359 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-19 18:26:30,359 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-19 18:26:30,359 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-19 18:26:30,360 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-19 18:26:30,360 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-19 18:26:30,360 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-19 18:26:30,360 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-19 18:26:30,360 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-19 18:26:30,360 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-19 18:26:30,361 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-19 18:26:30,361 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-19 18:26:30,361 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-19 18:26:30,361 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-19 18:26:30,361 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-19 18:26:30,361 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-19 18:26:30,361 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-19 18:26:30,361 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-19 18:26:30,362 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-19 18:26:30,362 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-19 18:26:30,362 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-19 18:26:30,362 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-19 18:26:30,362 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-19 18:26:30,362 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-19 18:26:30,362 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-19 18:26:30,363 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-19 18:26:30,363 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-19 18:26:30,363 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-19 18:26:30,363 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-19 18:26:30,363 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-19 18:26:30,363 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-19 18:26:30,363 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-19 18:26:30,364 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-19 18:26:30,364 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-19 18:26:30,364 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-19 18:26:30,364 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-19 18:26:30,364 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-19 18:26:30,364 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-19 18:26:30,364 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-19 18:26:30,365 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-19 18:26:30,365 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-19 18:26:30,365 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-19 18:26:30,365 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-19 18:26:30,365 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-19 18:26:30,365 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-19 18:26:30,365 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-19 18:26:30,365 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-19 18:26:30,366 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-19 18:26:30,366 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-19 18:26:30,366 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-19 18:26:30,366 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-19 18:26:30,366 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-19 18:26:30,366 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-19 18:26:30,366 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-19 18:26:30,367 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-19 18:26:30,367 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-19 18:26:30,367 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-19 18:26:30,367 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-19 18:26:30,367 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-19 18:26:30,367 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-19 18:26:30,367 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-19 18:26:30,367 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-19 18:26:30,368 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-19 18:26:30,368 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-19 18:26:30,368 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-19 18:26:30,368 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-19 18:26:30,368 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-19 18:26:30,368 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-19 18:26:30,369 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-19 18:26:30,369 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-19 18:26:30,369 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-19 18:26:30,369 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-19 18:26:30,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-19 18:26:30,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 18:26:30,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-19 18:26:30,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-19 18:26:30,370 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 18:26:30,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-19 18:26:30,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 18:26:30,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:26:30,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 18:26:30,771 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-19 18:26:30,973 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:26:30,973 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-19 18:26:30,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:26:30 BoogieIcfgContainer [2020-10-19 18:26:30,976 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:26:30,977 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 18:26:30,977 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 18:26:30,981 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 18:26:30,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 06:26:29" (1/3) ... [2020-10-19 18:26:30,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12bde2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:26:30, skipping insertion in model container [2020-10-19 18:26:30,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:26:30" (2/3) ... [2020-10-19 18:26:30,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12bde2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:26:30, skipping insertion in model container [2020-10-19 18:26:30,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:26:30" (3/3) ... [2020-10-19 18:26:30,985 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-1.i [2020-10-19 18:26:30,997 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 18:26:31,005 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 18 error locations. [2020-10-19 18:26:31,018 INFO L253 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2020-10-19 18:26:31,036 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 18:26:31,036 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-19 18:26:31,036 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 18:26:31,036 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:26:31,036 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:26:31,037 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 18:26:31,037 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:26:31,037 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 18:26:31,055 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states. [2020-10-19 18:26:31,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-19 18:26:31,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:26:31,066 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:26:31,067 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2020-10-19 18:26:31,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:26:31,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1710644861, now seen corresponding path program 1 times [2020-10-19 18:26:31,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:26:31,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063347245] [2020-10-19 18:26:31,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:26:31,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:31,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:26:31,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:31,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:26:31,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063347245] [2020-10-19 18:26:31,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:26:31,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:26:31,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144343943] [2020-10-19 18:26:31,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:26:31,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:26:31,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:26:31,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:26:31,409 INFO L87 Difference]: Start difference. First operand 58 states. Second operand 4 states. [2020-10-19 18:26:31,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:26:31,611 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2020-10-19 18:26:31,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:26:31,613 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-10-19 18:26:31,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:26:31,623 INFO L225 Difference]: With dead ends: 54 [2020-10-19 18:26:31,623 INFO L226 Difference]: Without dead ends: 47 [2020-10-19 18:26:31,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:26:31,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-19 18:26:31,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-19 18:26:31,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-19 18:26:31,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-19 18:26:31,666 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 9 [2020-10-19 18:26:31,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:26:31,666 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-19 18:26:31,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:26:31,667 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-19 18:26:31,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-19 18:26:31,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:26:31,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:26:31,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 18:26:31,668 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2020-10-19 18:26:31,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:26:31,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1710644862, now seen corresponding path program 1 times [2020-10-19 18:26:31,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:26:31,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748001053] [2020-10-19 18:26:31,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:26:31,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:31,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:26:31,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:31,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:26:31,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748001053] [2020-10-19 18:26:31,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:26:31,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:26:31,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075210068] [2020-10-19 18:26:31,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:26:31,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:26:31,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:26:31,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:26:31,768 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 4 states. [2020-10-19 18:26:31,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:26:31,884 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-10-19 18:26:31,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:26:31,885 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-10-19 18:26:31,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:26:31,886 INFO L225 Difference]: With dead ends: 46 [2020-10-19 18:26:31,886 INFO L226 Difference]: Without dead ends: 46 [2020-10-19 18:26:31,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:26:31,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-19 18:26:31,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-19 18:26:31,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-19 18:26:31,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-10-19 18:26:31,894 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 9 [2020-10-19 18:26:31,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:26:31,894 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-10-19 18:26:31,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:26:31,895 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-10-19 18:26:31,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-19 18:26:31,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:26:31,896 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:26:31,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 18:26:31,896 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2020-10-19 18:26:31,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:26:31,897 INFO L82 PathProgramCache]: Analyzing trace with hash 2034095075, now seen corresponding path program 1 times [2020-10-19 18:26:31,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:26:31,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843978258] [2020-10-19 18:26:31,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:26:31,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:31,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:26:31,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:32,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:26:32,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843978258] [2020-10-19 18:26:32,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:26:32,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:26:32,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345895011] [2020-10-19 18:26:32,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 18:26:32,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:26:32,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 18:26:32,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:26:32,017 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 5 states. [2020-10-19 18:26:32,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:26:32,215 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2020-10-19 18:26:32,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 18:26:32,215 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-10-19 18:26:32,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:26:32,219 INFO L225 Difference]: With dead ends: 76 [2020-10-19 18:26:32,219 INFO L226 Difference]: Without dead ends: 76 [2020-10-19 18:26:32,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:26:32,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-19 18:26:32,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 50. [2020-10-19 18:26:32,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-19 18:26:32,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2020-10-19 18:26:32,228 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 12 [2020-10-19 18:26:32,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:26:32,229 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2020-10-19 18:26:32,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 18:26:32,229 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2020-10-19 18:26:32,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-19 18:26:32,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:26:32,230 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:26:32,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-19 18:26:32,231 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2020-10-19 18:26:32,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:26:32,231 INFO L82 PathProgramCache]: Analyzing trace with hash 2034095076, now seen corresponding path program 1 times [2020-10-19 18:26:32,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:26:32,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782440206] [2020-10-19 18:26:32,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:26:32,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:32,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:26:32,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:32,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:26:32,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782440206] [2020-10-19 18:26:32,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:26:32,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:26:32,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961733067] [2020-10-19 18:26:32,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 18:26:32,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:26:32,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 18:26:32,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:26:32,324 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 5 states. [2020-10-19 18:26:32,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:26:32,489 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2020-10-19 18:26:32,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:26:32,490 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-10-19 18:26:32,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:26:32,491 INFO L225 Difference]: With dead ends: 65 [2020-10-19 18:26:32,491 INFO L226 Difference]: Without dead ends: 65 [2020-10-19 18:26:32,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:26:32,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-19 18:26:32,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2020-10-19 18:26:32,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-19 18:26:32,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2020-10-19 18:26:32,499 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 12 [2020-10-19 18:26:32,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:26:32,499 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2020-10-19 18:26:32,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 18:26:32,500 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2020-10-19 18:26:32,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-19 18:26:32,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:26:32,501 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:26:32,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-19 18:26:32,501 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2020-10-19 18:26:32,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:26:32,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1492451147, now seen corresponding path program 1 times [2020-10-19 18:26:32,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:26:32,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352164620] [2020-10-19 18:26:32,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:26:32,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:32,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:26:32,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:32,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:26:32,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352164620] [2020-10-19 18:26:32,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:26:32,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 18:26:32,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198398714] [2020-10-19 18:26:32,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 18:26:32,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:26:32,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 18:26:32,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:26:32,605 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand 5 states. [2020-10-19 18:26:32,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:26:32,759 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2020-10-19 18:26:32,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:26:32,762 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-19 18:26:32,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:26:32,763 INFO L225 Difference]: With dead ends: 62 [2020-10-19 18:26:32,763 INFO L226 Difference]: Without dead ends: 62 [2020-10-19 18:26:32,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:26:32,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-19 18:26:32,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2020-10-19 18:26:32,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-19 18:26:32,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2020-10-19 18:26:32,776 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 17 [2020-10-19 18:26:32,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:26:32,777 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2020-10-19 18:26:32,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 18:26:32,777 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2020-10-19 18:26:32,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 18:26:32,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:26:32,779 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:26:32,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-19 18:26:32,780 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2020-10-19 18:26:32,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:26:32,780 INFO L82 PathProgramCache]: Analyzing trace with hash 150016515, now seen corresponding path program 1 times [2020-10-19 18:26:32,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:26:32,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652803132] [2020-10-19 18:26:32,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:26:32,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:32,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:26:32,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:32,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:26:32,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652803132] [2020-10-19 18:26:32,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:26:32,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-19 18:26:32,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400393830] [2020-10-19 18:26:32,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-19 18:26:32,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:26:32,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-19 18:26:32,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-19 18:26:32,933 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 8 states. [2020-10-19 18:26:33,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:26:33,150 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2020-10-19 18:26:33,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-19 18:26:33,151 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-19 18:26:33,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:26:33,154 INFO L225 Difference]: With dead ends: 77 [2020-10-19 18:26:33,154 INFO L226 Difference]: Without dead ends: 77 [2020-10-19 18:26:33,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:26:33,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-19 18:26:33,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 59. [2020-10-19 18:26:33,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-19 18:26:33,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-10-19 18:26:33,172 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 20 [2020-10-19 18:26:33,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:26:33,172 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-10-19 18:26:33,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-19 18:26:33,172 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-10-19 18:26:33,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 18:26:33,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:26:33,176 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:26:33,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-19 18:26:33,177 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2020-10-19 18:26:33,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:26:33,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1581532758, now seen corresponding path program 1 times [2020-10-19 18:26:33,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:26:33,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995970491] [2020-10-19 18:26:33,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:26:33,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:33,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:26:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:33,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:26:33,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995970491] [2020-10-19 18:26:33,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:26:33,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-19 18:26:33,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143938477] [2020-10-19 18:26:33,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 18:26:33,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:26:33,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 18:26:33,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-19 18:26:33,289 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 7 states. [2020-10-19 18:26:33,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:26:33,530 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2020-10-19 18:26:33,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-19 18:26:33,531 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-19 18:26:33,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:26:33,533 INFO L225 Difference]: With dead ends: 70 [2020-10-19 18:26:33,533 INFO L226 Difference]: Without dead ends: 70 [2020-10-19 18:26:33,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-19 18:26:33,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-19 18:26:33,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 57. [2020-10-19 18:26:33,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-19 18:26:33,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-10-19 18:26:33,547 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 20 [2020-10-19 18:26:33,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:26:33,549 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-10-19 18:26:33,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 18:26:33,550 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-10-19 18:26:33,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 18:26:33,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:26:33,552 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:26:33,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-19 18:26:33,553 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2020-10-19 18:26:33,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:26:33,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1581532759, now seen corresponding path program 1 times [2020-10-19 18:26:33,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:26:33,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456715496] [2020-10-19 18:26:33,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:26:33,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:33,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:26:33,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:33,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:26:33,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456715496] [2020-10-19 18:26:33,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:26:33,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-19 18:26:33,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258670132] [2020-10-19 18:26:33,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 18:26:33,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:26:33,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 18:26:33,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-19 18:26:33,710 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 7 states. [2020-10-19 18:26:33,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:26:33,986 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2020-10-19 18:26:33,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 18:26:33,987 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-19 18:26:33,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:26:33,988 INFO L225 Difference]: With dead ends: 66 [2020-10-19 18:26:33,988 INFO L226 Difference]: Without dead ends: 66 [2020-10-19 18:26:33,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-19 18:26:33,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-19 18:26:33,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 47. [2020-10-19 18:26:33,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-19 18:26:33,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-10-19 18:26:33,999 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 20 [2020-10-19 18:26:34,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:26:34,000 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-10-19 18:26:34,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 18:26:34,000 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-10-19 18:26:34,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-19 18:26:34,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:26:34,003 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:26:34,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-19 18:26:34,004 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2020-10-19 18:26:34,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:26:34,005 INFO L82 PathProgramCache]: Analyzing trace with hash 359627482, now seen corresponding path program 1 times [2020-10-19 18:26:34,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:26:34,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066614320] [2020-10-19 18:26:34,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:26:34,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:34,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:26:34,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:34,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:26:34,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066614320] [2020-10-19 18:26:34,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746733270] [2020-10-19 18:26:34,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:26:34,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:34,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-19 18:26:34,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:26:34,480 INFO L384 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 [2020-10-19 18:26:34,481 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:26:34,489 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:26:34,493 INFO L384 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 [2020-10-19 18:26:34,494 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-19 18:26:34,500 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:26:34,500 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 18:26:34,501 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2020-10-19 18:26:34,546 INFO L384 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 15 treesize of output 7 [2020-10-19 18:26:34,547 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:26:34,553 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:26:34,557 INFO L384 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 15 treesize of output 7 [2020-10-19 18:26:34,557 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-19 18:26:34,562 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:26:34,562 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 18:26:34,563 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2020-10-19 18:26:34,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:26:34,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:26:34,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 12 [2020-10-19 18:26:34,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032585364] [2020-10-19 18:26:34,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-19 18:26:34,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:26:34,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-19 18:26:34,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-19 18:26:34,571 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 12 states. [2020-10-19 18:26:34,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:26:34,853 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-10-19 18:26:34,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 18:26:34,854 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2020-10-19 18:26:34,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:26:34,855 INFO L225 Difference]: With dead ends: 62 [2020-10-19 18:26:34,855 INFO L226 Difference]: Without dead ends: 62 [2020-10-19 18:26:34,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-10-19 18:26:34,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-19 18:26:34,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 50. [2020-10-19 18:26:34,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-19 18:26:34,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-10-19 18:26:34,871 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 21 [2020-10-19 18:26:34,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:26:34,872 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-10-19 18:26:34,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-19 18:26:34,872 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-10-19 18:26:34,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-19 18:26:34,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:26:34,873 INFO L422 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] [2020-10-19 18:26:35,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-19 18:26:35,086 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2020-10-19 18:26:35,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:26:35,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1736451208, now seen corresponding path program 1 times [2020-10-19 18:26:35,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:26:35,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606005909] [2020-10-19 18:26:35,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:26:35,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:26:35,103 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:26:35,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:26:35,116 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:26:35,140 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:26:35,141 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 18:26:35,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-19 18:26:35,157 WARN L417 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2020-10-19 18:26:35,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 06:26:35 BoogieIcfgContainer [2020-10-19 18:26:35,173 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 18:26:35,173 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:26:35,173 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:26:35,173 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:26:35,174 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:26:30" (3/4) ... [2020-10-19 18:26:35,176 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-19 18:26:35,183 WARN L417 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2020-10-19 18:26:35,243 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 18:26:35,243 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:26:35,245 INFO L168 Benchmark]: Toolchain (without parser) took 5619.02 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 209.2 MB). Free memory was 960.0 MB in the beginning and 1.0 GB in the end (delta: -53.7 MB). Peak memory consumption was 155.5 MB. Max. memory is 11.5 GB. [2020-10-19 18:26:35,245 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:26:35,246 INFO L168 Benchmark]: CACSL2BoogieTranslator took 587.03 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 954.6 MB in the beginning and 1.1 GB in the end (delta: -164.4 MB). Peak memory consumption was 26.5 MB. Max. memory is 11.5 GB. [2020-10-19 18:26:35,246 INFO L168 Benchmark]: Boogie Preprocessor took 62.04 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 11.5 GB. [2020-10-19 18:26:35,247 INFO L168 Benchmark]: RCFGBuilder took 693.39 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 50.9 MB). Peak memory consumption was 50.9 MB. Max. memory is 11.5 GB. [2020-10-19 18:26:35,248 INFO L168 Benchmark]: TraceAbstraction took 4195.78 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 72.4 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 33.5 MB). Peak memory consumption was 105.8 MB. Max. memory is 11.5 GB. [2020-10-19 18:26:35,248 INFO L168 Benchmark]: Witness Printer took 69.90 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 7.8 MB). Peak memory consumption was 7.8 MB. Max. memory is 11.5 GB. [2020-10-19 18:26:35,251 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 587.03 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 954.6 MB in the beginning and 1.1 GB in the end (delta: -164.4 MB). Peak memory consumption was 26.5 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 62.04 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 11.5 GB. * RCFGBuilder took 693.39 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 50.9 MB). Peak memory consumption was 50.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4195.78 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 72.4 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 33.5 MB). Peak memory consumption was 105.8 MB. Max. memory is 11.5 GB. * Witness Printer took 69.90 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 7.8 MB). Peak memory consumption was 7.8 MB. Max. memory is 11.5 GB. * 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: - 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)); VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}] [L533] COND FALSE !(a == 0) VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}] [L534] List t; [L535] List p = a; VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L536] a->h = 2 VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L537] COND FALSE !(__VERIFIER_nondet_int()) [L544] p->h = 2 VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L545] p->n = 0 VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L546] p = a VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L547] COND TRUE p!=0 VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L548] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->h=2] [L548] COND FALSE !(p->h != 2) [L551] EXPR p->n VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->n={0:0}] [L551] p = p->n [L547] COND FALSE !(p!=0) VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, p={0:0}] [L553] return 0; VAL [\result=0, a={-1:0}, malloc(sizeof(struct node))={-1:0}, p={0:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 74 locations, 18 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.1s, OverallIterations: 10, TraceHistogramMax: 2, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 259 SDtfs, 540 SDslu, 416 SDs, 0 SdLazy, 1119 SolverSat, 99 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 95 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 99 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 183 NumberOfCodeBlocks, 183 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 151 ConstructedInterpolants, 0 QuantifiedInterpolants, 16396 SizeOfPredicates, 12 NumberOfNonLiveVariables, 136 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 10 InterpolantComputations, 8 PerfectInterpolantSequences, 6/8 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! Received shutdown request...