./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../sv-benchmarks/c/list-properties/alternating_list-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.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/alternating_list-2.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 da856cb29218eae000c82400da3ef1c667e9f55c .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.25-9a8b2e8 [2020-10-20 06:19:07,373 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 06:19:07,376 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 06:19:07,412 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 06:19:07,413 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 06:19:07,422 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 06:19:07,423 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 06:19:07,426 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 06:19:07,429 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 06:19:07,430 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 06:19:07,432 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 06:19:07,434 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 06:19:07,435 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 06:19:07,438 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 06:19:07,440 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 06:19:07,442 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 06:19:07,444 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 06:19:07,446 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 06:19:07,449 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 06:19:07,453 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 06:19:07,456 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 06:19:07,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 06:19:07,460 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 06:19:07,461 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 06:19:07,483 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 06:19:07,485 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 06:19:07,485 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 06:19:07,486 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 06:19:07,488 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 06:19:07,489 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 06:19:07,490 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 06:19:07,491 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 06:19:07,492 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 06:19:07,493 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 06:19:07,494 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 06:19:07,494 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 06:19:07,495 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 06:19:07,496 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 06:19:07,496 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 06:19:07,497 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 06:19:07,498 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 06:19:07,500 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2020-10-20 06:19:07,550 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 06:19:07,550 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 06:19:07,551 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 06:19:07,552 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 06:19:07,552 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 06:19:07,552 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 06:19:07,553 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 06:19:07,553 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 06:19:07,553 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 06:19:07,553 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 06:19:07,553 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 06:19:07,554 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-20 06:19:07,554 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-20 06:19:07,554 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 06:19:07,554 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-20 06:19:07,555 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 06:19:07,555 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 06:19:07,555 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 06:19:07,555 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 06:19:07,556 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 06:19:07,556 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 06:19:07,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 06:19:07,557 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 06:19:07,557 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 06:19:07,557 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 06:19:07,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 06:19:07,557 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 06:19:07,558 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 -> da856cb29218eae000c82400da3ef1c667e9f55c [2020-10-20 06:19:07,783 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 06:19:07,802 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 06:19:07,807 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 06:19:07,811 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 06:19:07,811 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 06:19:07,812 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/alternating_list-2.i [2020-10-20 06:19:07,876 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/484363949/cc153bb6884c481bbe16bd9eb11c37e3/FLAG9458e1d5c [2020-10-20 06:19:08,394 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 06:19:08,395 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/alternating_list-2.i [2020-10-20 06:19:08,416 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/484363949/cc153bb6884c481bbe16bd9eb11c37e3/FLAG9458e1d5c [2020-10-20 06:19:08,701 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/484363949/cc153bb6884c481bbe16bd9eb11c37e3 [2020-10-20 06:19:08,704 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 06:19:08,712 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-20 06:19:08,713 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 06:19:08,713 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 06:19:08,717 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 06:19:08,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:19:08" (1/1) ... [2020-10-20 06:19:08,724 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67caf844 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:19:08, skipping insertion in model container [2020-10-20 06:19:08,724 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:19:08" (1/1) ... [2020-10-20 06:19:08,734 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 06:19:08,793 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 06:19:09,194 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:19:09,211 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 06:19:09,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:19:09,376 INFO L208 MainTranslator]: Completed translation [2020-10-20 06:19:09,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:19:09 WrapperNode [2020-10-20 06:19:09,377 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 06:19:09,378 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 06:19:09,378 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 06:19:09,378 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 06:19:09,393 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:19:09" (1/1) ... [2020-10-20 06:19:09,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:19:09" (1/1) ... [2020-10-20 06:19:09,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:19:09" (1/1) ... [2020-10-20 06:19:09,431 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:19:09" (1/1) ... [2020-10-20 06:19:09,455 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:19:09" (1/1) ... [2020-10-20 06:19:09,463 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:19:09" (1/1) ... [2020-10-20 06:19:09,466 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:19:09" (1/1) ... [2020-10-20 06:19:09,473 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 06:19:09,474 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 06:19:09,474 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 06:19:09,474 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 06:19:09,475 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:19:09" (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 [2020-10-20 06:19:09,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-20 06:19:09,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 06:19:09,540 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-20 06:19:09,540 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-20 06:19:09,541 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-20 06:19:09,541 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-20 06:19:09,541 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-20 06:19:09,541 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-20 06:19:09,541 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-20 06:19:09,541 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-20 06:19:09,542 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-20 06:19:09,542 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-20 06:19:09,542 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-20 06:19:09,542 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-20 06:19:09,542 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-20 06:19:09,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 06:19:09,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-20 06:19:09,543 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-20 06:19:09,543 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-20 06:19:09,543 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-20 06:19:09,544 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-20 06:19:09,544 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-20 06:19:09,544 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-20 06:19:09,544 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-20 06:19:09,545 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-20 06:19:09,545 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-20 06:19:09,545 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-20 06:19:09,545 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-20 06:19:09,545 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-20 06:19:09,546 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-20 06:19:09,546 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-20 06:19:09,546 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-20 06:19:09,546 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-20 06:19:09,547 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-20 06:19:09,547 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-20 06:19:09,547 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-20 06:19:09,547 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-20 06:19:09,548 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-20 06:19:09,548 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-20 06:19:09,548 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-20 06:19:09,548 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-20 06:19:09,548 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-20 06:19:09,549 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-20 06:19:09,549 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-20 06:19:09,549 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-20 06:19:09,549 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-20 06:19:09,549 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-20 06:19:09,550 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-20 06:19:09,550 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-20 06:19:09,550 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-20 06:19:09,550 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-20 06:19:09,550 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-20 06:19:09,551 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-20 06:19:09,551 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-20 06:19:09,551 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-20 06:19:09,551 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-20 06:19:09,552 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-20 06:19:09,552 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-20 06:19:09,552 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-20 06:19:09,552 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-20 06:19:09,552 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-20 06:19:09,553 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-20 06:19:09,553 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-20 06:19:09,553 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-20 06:19:09,553 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-20 06:19:09,553 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-20 06:19:09,554 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-20 06:19:09,554 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-20 06:19:09,554 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-20 06:19:09,554 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-20 06:19:09,554 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-20 06:19:09,555 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-20 06:19:09,555 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-20 06:19:09,555 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-20 06:19:09,555 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-20 06:19:09,555 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-20 06:19:09,556 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-20 06:19:09,556 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-20 06:19:09,556 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-20 06:19:09,556 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-20 06:19:09,556 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-20 06:19:09,557 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-20 06:19:09,557 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-20 06:19:09,557 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-20 06:19:09,557 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-20 06:19:09,558 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-20 06:19:09,558 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-20 06:19:09,558 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-20 06:19:09,558 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-20 06:19:09,558 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-20 06:19:09,559 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-20 06:19:09,559 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-20 06:19:09,559 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-20 06:19:09,559 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-20 06:19:09,559 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-20 06:19:09,560 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-20 06:19:09,560 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-20 06:19:09,560 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-20 06:19:09,560 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-20 06:19:09,560 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-20 06:19:09,560 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-20 06:19:09,560 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-20 06:19:09,560 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-20 06:19:09,560 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-20 06:19:09,561 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-20 06:19:09,561 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-20 06:19:09,561 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-20 06:19:09,561 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-20 06:19:09,561 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-20 06:19:09,561 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-20 06:19:09,561 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-20 06:19:09,561 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-20 06:19:09,561 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-20 06:19:09,562 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-20 06:19:09,562 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-20 06:19:09,562 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-20 06:19:09,562 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-20 06:19:09,562 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-20 06:19:09,562 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-20 06:19:09,563 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-20 06:19:09,563 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-20 06:19:09,563 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-20 06:19:09,563 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-20 06:19:09,563 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-20 06:19:09,563 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-20 06:19:09,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-20 06:19:09,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-20 06:19:09,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-20 06:19:09,564 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-20 06:19:09,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 06:19:09,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 06:19:09,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-20 06:19:09,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 06:19:09,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 06:19:09,939 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-20 06:19:10,169 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 06:19:10,170 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-20 06:19:10,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:19:10 BoogieIcfgContainer [2020-10-20 06:19:10,172 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 06:19:10,173 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 06:19:10,174 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 06:19:10,177 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 06:19:10,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 06:19:08" (1/3) ... [2020-10-20 06:19:10,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d05f076 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:19:10, skipping insertion in model container [2020-10-20 06:19:10,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:19:09" (2/3) ... [2020-10-20 06:19:10,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d05f076 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:19:10, skipping insertion in model container [2020-10-20 06:19:10,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:19:10" (3/3) ... [2020-10-20 06:19:10,181 INFO L111 eAbstractionObserver]: Analyzing ICFG alternating_list-2.i [2020-10-20 06:19:10,192 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 06:19:10,200 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 30 error locations. [2020-10-20 06:19:10,226 INFO L253 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2020-10-20 06:19:10,243 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 06:19:10,244 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-20 06:19:10,244 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 06:19:10,244 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 06:19:10,244 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 06:19:10,244 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 06:19:10,245 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 06:19:10,245 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 06:19:10,262 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2020-10-20 06:19:10,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 06:19:10,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:19:10,273 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:19:10,273 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr25ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr23ASSERT_VIOLATIONMEMORY_FREE, mainErr27ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr22ASSERT_VIOLATIONMEMORY_FREE, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr28ENSURES_VIOLATIONMEMORY_LEAK, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr24ASSERT_VIOLATIONMEMORY_FREE, mainErr26ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-20 06:19:10,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:19:10,278 INFO L82 PathProgramCache]: Analyzing trace with hash -463735565, now seen corresponding path program 1 times [2020-10-20 06:19:10,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:19:10,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795181591] [2020-10-20 06:19:10,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:19:10,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:19:10,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:19:10,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:19:10,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:19:10,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795181591] [2020-10-20 06:19:10,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:19:10,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 06:19:10,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842023602] [2020-10-20 06:19:10,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 06:19:10,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:19:10,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 06:19:10,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 06:19:10,630 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 3 states. [2020-10-20 06:19:10,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:19:10,879 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2020-10-20 06:19:10,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 06:19:10,881 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-20 06:19:10,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:19:10,898 INFO L225 Difference]: With dead ends: 83 [2020-10-20 06:19:10,898 INFO L226 Difference]: Without dead ends: 76 [2020-10-20 06:19:10,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 06:19:10,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-20 06:19:10,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-20 06:19:10,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-20 06:19:10,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2020-10-20 06:19:10,943 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 10 [2020-10-20 06:19:10,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:19:10,944 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2020-10-20 06:19:10,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 06:19:10,944 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2020-10-20 06:19:10,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 06:19:10,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:19:10,945 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:19:10,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 06:19:10,946 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr25ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr23ASSERT_VIOLATIONMEMORY_FREE, mainErr27ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr22ASSERT_VIOLATIONMEMORY_FREE, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr28ENSURES_VIOLATIONMEMORY_LEAK, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr24ASSERT_VIOLATIONMEMORY_FREE, mainErr26ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-20 06:19:10,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:19:10,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1490936265, now seen corresponding path program 1 times [2020-10-20 06:19:10,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:19:10,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871365247] [2020-10-20 06:19:10,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:19:10,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:19:11,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:19:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:19:11,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:19:11,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871365247] [2020-10-20 06:19:11,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:19:11,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:19:11,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996123590] [2020-10-20 06:19:11,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 06:19:11,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:19:11,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 06:19:11,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:19:11,078 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand 5 states. [2020-10-20 06:19:11,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:19:11,323 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2020-10-20 06:19:11,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 06:19:11,323 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-10-20 06:19:11,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:19:11,325 INFO L225 Difference]: With dead ends: 97 [2020-10-20 06:19:11,325 INFO L226 Difference]: Without dead ends: 97 [2020-10-20 06:19:11,326 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 [2020-10-20 06:19:11,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-20 06:19:11,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 77. [2020-10-20 06:19:11,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-20 06:19:11,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2020-10-20 06:19:11,337 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 11 [2020-10-20 06:19:11,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:19:11,338 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2020-10-20 06:19:11,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 06:19:11,338 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2020-10-20 06:19:11,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 06:19:11,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:19:11,339 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:19:11,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 06:19:11,340 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr25ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr23ASSERT_VIOLATIONMEMORY_FREE, mainErr27ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr22ASSERT_VIOLATIONMEMORY_FREE, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr28ENSURES_VIOLATIONMEMORY_LEAK, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr24ASSERT_VIOLATIONMEMORY_FREE, mainErr26ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-20 06:19:11,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:19:11,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1490936264, now seen corresponding path program 1 times [2020-10-20 06:19:11,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:19:11,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535440441] [2020-10-20 06:19:11,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:19:11,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:19:11,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:19:11,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:19:11,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:19:11,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535440441] [2020-10-20 06:19:11,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:19:11,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:19:11,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639971864] [2020-10-20 06:19:11,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 06:19:11,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:19:11,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 06:19:11,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:19:11,521 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 5 states. [2020-10-20 06:19:11,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:19:11,797 INFO L93 Difference]: Finished difference Result 104 states and 115 transitions. [2020-10-20 06:19:11,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 06:19:11,798 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-10-20 06:19:11,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:19:11,814 INFO L225 Difference]: With dead ends: 104 [2020-10-20 06:19:11,814 INFO L226 Difference]: Without dead ends: 104 [2020-10-20 06:19:11,815 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 [2020-10-20 06:19:11,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-20 06:19:11,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2020-10-20 06:19:11,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-20 06:19:11,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2020-10-20 06:19:11,831 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 11 [2020-10-20 06:19:11,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:19:11,831 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2020-10-20 06:19:11,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 06:19:11,831 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2020-10-20 06:19:11,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-20 06:19:11,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:19:11,832 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:19:11,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 06:19:11,833 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr25ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr23ASSERT_VIOLATIONMEMORY_FREE, mainErr27ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr22ASSERT_VIOLATIONMEMORY_FREE, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr28ENSURES_VIOLATIONMEMORY_LEAK, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr24ASSERT_VIOLATIONMEMORY_FREE, mainErr26ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-20 06:19:11,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:19:11,833 INFO L82 PathProgramCache]: Analyzing trace with hash -574680799, now seen corresponding path program 1 times [2020-10-20 06:19:11,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:19:11,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13172401] [2020-10-20 06:19:11,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:19:11,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:19:11,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:19:11,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:19:11,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:19:11,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13172401] [2020-10-20 06:19:11,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:19:11,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:19:11,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002734136] [2020-10-20 06:19:11,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 06:19:11,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:19:11,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 06:19:11,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:19:11,912 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand 5 states. [2020-10-20 06:19:12,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:19:12,107 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2020-10-20 06:19:12,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 06:19:12,107 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-20 06:19:12,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:19:12,109 INFO L225 Difference]: With dead ends: 100 [2020-10-20 06:19:12,109 INFO L226 Difference]: Without dead ends: 100 [2020-10-20 06:19:12,109 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 [2020-10-20 06:19:12,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-20 06:19:12,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2020-10-20 06:19:12,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-20 06:19:12,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 106 transitions. [2020-10-20 06:19:12,117 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 106 transitions. Word has length 19 [2020-10-20 06:19:12,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:19:12,117 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 106 transitions. [2020-10-20 06:19:12,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 06:19:12,118 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 106 transitions. [2020-10-20 06:19:12,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-20 06:19:12,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:19:12,119 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] [2020-10-20 06:19:12,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-20 06:19:12,119 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr25ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr23ASSERT_VIOLATIONMEMORY_FREE, mainErr27ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr22ASSERT_VIOLATIONMEMORY_FREE, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr28ENSURES_VIOLATIONMEMORY_LEAK, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr24ASSERT_VIOLATIONMEMORY_FREE, mainErr26ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-20 06:19:12,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:19:12,120 INFO L82 PathProgramCache]: Analyzing trace with hash 633071481, now seen corresponding path program 1 times [2020-10-20 06:19:12,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:19:12,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102886814] [2020-10-20 06:19:12,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:19:12,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:19:12,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:19:12,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:19:12,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:19:12,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102886814] [2020-10-20 06:19:12,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:19:12,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:19:12,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375803658] [2020-10-20 06:19:12,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:19:12,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:19:12,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:19:12,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:19:12,173 INFO L87 Difference]: Start difference. First operand 94 states and 106 transitions. Second operand 4 states. [2020-10-20 06:19:12,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:19:12,311 INFO L93 Difference]: Finished difference Result 143 states and 155 transitions. [2020-10-20 06:19:12,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:19:12,312 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-20 06:19:12,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:19:12,313 INFO L225 Difference]: With dead ends: 143 [2020-10-20 06:19:12,313 INFO L226 Difference]: Without dead ends: 143 [2020-10-20 06:19:12,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:19:12,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-20 06:19:12,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 103. [2020-10-20 06:19:12,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-20 06:19:12,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 119 transitions. [2020-10-20 06:19:12,327 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 119 transitions. Word has length 20 [2020-10-20 06:19:12,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:19:12,328 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 119 transitions. [2020-10-20 06:19:12,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:19:12,328 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 119 transitions. [2020-10-20 06:19:12,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-20 06:19:12,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:19:12,329 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] [2020-10-20 06:19:12,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-20 06:19:12,330 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr25ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr23ASSERT_VIOLATIONMEMORY_FREE, mainErr27ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr22ASSERT_VIOLATIONMEMORY_FREE, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr28ENSURES_VIOLATIONMEMORY_LEAK, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr24ASSERT_VIOLATIONMEMORY_FREE, mainErr26ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-20 06:19:12,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:19:12,331 INFO L82 PathProgramCache]: Analyzing trace with hash 337246851, now seen corresponding path program 1 times [2020-10-20 06:19:12,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:19:12,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19058667] [2020-10-20 06:19:12,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:19:12,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:19:12,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:19:12,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:19:12,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:19:12,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19058667] [2020-10-20 06:19:12,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:19:12,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-20 06:19:12,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998692057] [2020-10-20 06:19:12,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 06:19:12,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:19:12,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 06:19:12,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-20 06:19:12,446 INFO L87 Difference]: Start difference. First operand 103 states and 119 transitions. Second operand 7 states. [2020-10-20 06:19:12,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:19:12,712 INFO L93 Difference]: Finished difference Result 144 states and 159 transitions. [2020-10-20 06:19:12,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 06:19:12,713 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-20 06:19:12,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:19:12,715 INFO L225 Difference]: With dead ends: 144 [2020-10-20 06:19:12,715 INFO L226 Difference]: Without dead ends: 144 [2020-10-20 06:19:12,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-20 06:19:12,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-20 06:19:12,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 106. [2020-10-20 06:19:12,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-20 06:19:12,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 122 transitions. [2020-10-20 06:19:12,724 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 122 transitions. Word has length 20 [2020-10-20 06:19:12,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:19:12,725 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 122 transitions. [2020-10-20 06:19:12,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 06:19:12,725 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 122 transitions. [2020-10-20 06:19:12,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-20 06:19:12,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:19:12,726 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] [2020-10-20 06:19:12,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-20 06:19:12,726 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr25ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr23ASSERT_VIOLATIONMEMORY_FREE, mainErr27ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr22ASSERT_VIOLATIONMEMORY_FREE, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr28ENSURES_VIOLATIONMEMORY_LEAK, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr24ASSERT_VIOLATIONMEMORY_FREE, mainErr26ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-20 06:19:12,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:19:12,727 INFO L82 PathProgramCache]: Analyzing trace with hash -635189694, now seen corresponding path program 1 times [2020-10-20 06:19:12,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:19:12,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135122573] [2020-10-20 06:19:12,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:19:12,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:19:12,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:19:12,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:19:12,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:19:12,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135122573] [2020-10-20 06:19:12,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:19:12,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 06:19:12,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861046291] [2020-10-20 06:19:12,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 06:19:12,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:19:12,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 06:19:12,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-20 06:19:12,805 INFO L87 Difference]: Start difference. First operand 106 states and 122 transitions. Second operand 6 states. [2020-10-20 06:19:12,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:19:12,990 INFO L93 Difference]: Finished difference Result 115 states and 130 transitions. [2020-10-20 06:19:12,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 06:19:12,990 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-20 06:19:12,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:19:12,992 INFO L225 Difference]: With dead ends: 115 [2020-10-20 06:19:12,992 INFO L226 Difference]: Without dead ends: 115 [2020-10-20 06:19:12,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-20 06:19:12,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-20 06:19:12,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 108. [2020-10-20 06:19:12,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-20 06:19:13,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 124 transitions. [2020-10-20 06:19:13,000 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 124 transitions. Word has length 20 [2020-10-20 06:19:13,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:19:13,001 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 124 transitions. [2020-10-20 06:19:13,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 06:19:13,001 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 124 transitions. [2020-10-20 06:19:13,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-20 06:19:13,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:19:13,002 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] [2020-10-20 06:19:13,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-20 06:19:13,002 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr25ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr23ASSERT_VIOLATIONMEMORY_FREE, mainErr27ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr22ASSERT_VIOLATIONMEMORY_FREE, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr28ENSURES_VIOLATIONMEMORY_LEAK, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr24ASSERT_VIOLATIONMEMORY_FREE, mainErr26ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-20 06:19:13,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:19:13,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1782539078, now seen corresponding path program 1 times [2020-10-20 06:19:13,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:19:13,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398534512] [2020-10-20 06:19:13,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:19:13,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:19:13,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:19:13,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:19:13,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:19:13,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398534512] [2020-10-20 06:19:13,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:19:13,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 06:19:13,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47294707] [2020-10-20 06:19:13,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 06:19:13,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:19:13,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 06:19:13,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-20 06:19:13,109 INFO L87 Difference]: Start difference. First operand 108 states and 124 transitions. Second operand 6 states. [2020-10-20 06:19:13,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:19:13,265 INFO L93 Difference]: Finished difference Result 122 states and 138 transitions. [2020-10-20 06:19:13,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 06:19:13,266 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-20 06:19:13,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:19:13,267 INFO L225 Difference]: With dead ends: 122 [2020-10-20 06:19:13,267 INFO L226 Difference]: Without dead ends: 118 [2020-10-20 06:19:13,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-20 06:19:13,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-20 06:19:13,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 111. [2020-10-20 06:19:13,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-20 06:19:13,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 127 transitions. [2020-10-20 06:19:13,281 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 127 transitions. Word has length 21 [2020-10-20 06:19:13,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:19:13,281 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 127 transitions. [2020-10-20 06:19:13,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 06:19:13,282 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 127 transitions. [2020-10-20 06:19:13,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-20 06:19:13,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:19:13,283 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] [2020-10-20 06:19:13,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-20 06:19:13,284 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr25ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr23ASSERT_VIOLATIONMEMORY_FREE, mainErr27ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr22ASSERT_VIOLATIONMEMORY_FREE, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr28ENSURES_VIOLATIONMEMORY_LEAK, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr24ASSERT_VIOLATIONMEMORY_FREE, mainErr26ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-20 06:19:13,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:19:13,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1783956134, now seen corresponding path program 1 times [2020-10-20 06:19:13,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:19:13,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951996187] [2020-10-20 06:19:13,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:19:13,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:19:13,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:19:13,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:19:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:19:13,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951996187] [2020-10-20 06:19:13,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:19:13,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 06:19:13,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954122649] [2020-10-20 06:19:13,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 06:19:13,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:19:13,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 06:19:13,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-20 06:19:13,386 INFO L87 Difference]: Start difference. First operand 111 states and 127 transitions. Second operand 6 states. [2020-10-20 06:19:13,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:19:13,614 INFO L93 Difference]: Finished difference Result 119 states and 134 transitions. [2020-10-20 06:19:13,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 06:19:13,614 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-20 06:19:13,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:19:13,616 INFO L225 Difference]: With dead ends: 119 [2020-10-20 06:19:13,616 INFO L226 Difference]: Without dead ends: 119 [2020-10-20 06:19:13,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-20 06:19:13,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-20 06:19:13,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 112. [2020-10-20 06:19:13,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-20 06:19:13,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 128 transitions. [2020-10-20 06:19:13,622 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 128 transitions. Word has length 21 [2020-10-20 06:19:13,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:19:13,622 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 128 transitions. [2020-10-20 06:19:13,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 06:19:13,622 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 128 transitions. [2020-10-20 06:19:13,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-20 06:19:13,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:19:13,623 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] [2020-10-20 06:19:13,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-20 06:19:13,624 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr25ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr23ASSERT_VIOLATIONMEMORY_FREE, mainErr27ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr22ASSERT_VIOLATIONMEMORY_FREE, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr28ENSURES_VIOLATIONMEMORY_LEAK, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr24ASSERT_VIOLATIONMEMORY_FREE, mainErr26ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-20 06:19:13,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:19:13,624 INFO L82 PathProgramCache]: Analyzing trace with hash 119047172, now seen corresponding path program 1 times [2020-10-20 06:19:13,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:19:13,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730168624] [2020-10-20 06:19:13,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:19:13,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:19:13,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:19:13,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:19:13,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:19:13,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730168624] [2020-10-20 06:19:13,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:19:13,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-20 06:19:13,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126523672] [2020-10-20 06:19:13,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 06:19:13,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:19:13,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 06:19:13,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-20 06:19:13,688 INFO L87 Difference]: Start difference. First operand 112 states and 128 transitions. Second operand 7 states. [2020-10-20 06:19:13,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:19:13,989 INFO L93 Difference]: Finished difference Result 116 states and 132 transitions. [2020-10-20 06:19:13,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 06:19:13,990 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-20 06:19:13,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:19:13,991 INFO L225 Difference]: With dead ends: 116 [2020-10-20 06:19:13,991 INFO L226 Difference]: Without dead ends: 116 [2020-10-20 06:19:13,991 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 [2020-10-20 06:19:13,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-20 06:19:13,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 109. [2020-10-20 06:19:13,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-20 06:19:13,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 125 transitions. [2020-10-20 06:19:13,996 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 125 transitions. Word has length 21 [2020-10-20 06:19:13,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:19:13,997 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 125 transitions. [2020-10-20 06:19:13,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 06:19:13,997 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 125 transitions. [2020-10-20 06:19:13,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-20 06:19:13,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:19:13,998 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] [2020-10-20 06:19:13,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-20 06:19:13,999 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr25ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr23ASSERT_VIOLATIONMEMORY_FREE, mainErr27ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr22ASSERT_VIOLATIONMEMORY_FREE, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr28ENSURES_VIOLATIONMEMORY_LEAK, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr24ASSERT_VIOLATIONMEMORY_FREE, mainErr26ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-20 06:19:13,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:19:14,000 INFO L82 PathProgramCache]: Analyzing trace with hash 119047173, now seen corresponding path program 1 times [2020-10-20 06:19:14,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:19:14,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529585710] [2020-10-20 06:19:14,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:19:14,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:19:14,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:19:14,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:19:14,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:19:14,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529585710] [2020-10-20 06:19:14,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:19:14,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-20 06:19:14,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936014599] [2020-10-20 06:19:14,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 06:19:14,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:19:14,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 06:19:14,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-20 06:19:14,115 INFO L87 Difference]: Start difference. First operand 109 states and 125 transitions. Second operand 7 states. [2020-10-20 06:19:14,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:19:14,472 INFO L93 Difference]: Finished difference Result 129 states and 143 transitions. [2020-10-20 06:19:14,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 06:19:14,472 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-20 06:19:14,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:19:14,473 INFO L225 Difference]: With dead ends: 129 [2020-10-20 06:19:14,474 INFO L226 Difference]: Without dead ends: 129 [2020-10-20 06:19:14,474 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 [2020-10-20 06:19:14,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-20 06:19:14,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 97. [2020-10-20 06:19:14,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-20 06:19:14,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 111 transitions. [2020-10-20 06:19:14,482 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 111 transitions. Word has length 21 [2020-10-20 06:19:14,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:19:14,483 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 111 transitions. [2020-10-20 06:19:14,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 06:19:14,483 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 111 transitions. [2020-10-20 06:19:14,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-20 06:19:14,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:19:14,487 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] [2020-10-20 06:19:14,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-20 06:19:14,488 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr25ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr23ASSERT_VIOLATIONMEMORY_FREE, mainErr27ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr22ASSERT_VIOLATIONMEMORY_FREE, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr28ENSURES_VIOLATIONMEMORY_LEAK, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr24ASSERT_VIOLATIONMEMORY_FREE, mainErr26ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-20 06:19:14,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:19:14,488 INFO L82 PathProgramCache]: Analyzing trace with hash -531934524, now seen corresponding path program 1 times [2020-10-20 06:19:14,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:19:14,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966391816] [2020-10-20 06:19:14,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:19:14,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:19:14,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:19:14,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:19:14,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:19:14,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966391816] [2020-10-20 06:19:14,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:19:14,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:19:14,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241431218] [2020-10-20 06:19:14,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 06:19:14,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:19:14,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 06:19:14,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:19:14,555 INFO L87 Difference]: Start difference. First operand 97 states and 111 transitions. Second operand 5 states. [2020-10-20 06:19:14,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:19:14,671 INFO L93 Difference]: Finished difference Result 96 states and 110 transitions. [2020-10-20 06:19:14,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 06:19:14,671 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-20 06:19:14,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:19:14,672 INFO L225 Difference]: With dead ends: 96 [2020-10-20 06:19:14,672 INFO L226 Difference]: Without dead ends: 96 [2020-10-20 06:19:14,673 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 [2020-10-20 06:19:14,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-20 06:19:14,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-10-20 06:19:14,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-20 06:19:14,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2020-10-20 06:19:14,676 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 22 [2020-10-20 06:19:14,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:19:14,676 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2020-10-20 06:19:14,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 06:19:14,676 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2020-10-20 06:19:14,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 06:19:14,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:19:14,677 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, 1] [2020-10-20 06:19:14,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-20 06:19:14,678 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr25ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr23ASSERT_VIOLATIONMEMORY_FREE, mainErr27ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr22ASSERT_VIOLATIONMEMORY_FREE, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr28ENSURES_VIOLATIONMEMORY_LEAK, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr24ASSERT_VIOLATIONMEMORY_FREE, mainErr26ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-20 06:19:14,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:19:14,678 INFO L82 PathProgramCache]: Analyzing trace with hash 689899095, now seen corresponding path program 1 times [2020-10-20 06:19:14,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:19:14,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480012779] [2020-10-20 06:19:14,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:19:14,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:19:14,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:19:14,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:19:14,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:19:14,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480012779] [2020-10-20 06:19:14,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:19:14,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-20 06:19:14,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020315559] [2020-10-20 06:19:14,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 06:19:14,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:19:14,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 06:19:14,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-20 06:19:14,772 INFO L87 Difference]: Start difference. First operand 96 states and 110 transitions. Second operand 7 states. [2020-10-20 06:19:14,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:19:14,976 INFO L93 Difference]: Finished difference Result 110 states and 122 transitions. [2020-10-20 06:19:14,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 06:19:14,977 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-20 06:19:14,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:19:14,978 INFO L225 Difference]: With dead ends: 110 [2020-10-20 06:19:14,978 INFO L226 Difference]: Without dead ends: 103 [2020-10-20 06:19:14,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-20 06:19:14,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-20 06:19:14,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 89. [2020-10-20 06:19:14,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-20 06:19:14,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 102 transitions. [2020-10-20 06:19:14,986 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 102 transitions. Word has length 23 [2020-10-20 06:19:14,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:19:14,986 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 102 transitions. [2020-10-20 06:19:14,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 06:19:14,986 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 102 transitions. [2020-10-20 06:19:14,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-20 06:19:14,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:19:14,988 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:19:14,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-20 06:19:14,989 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr25ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr23ASSERT_VIOLATIONMEMORY_FREE, mainErr27ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr22ASSERT_VIOLATIONMEMORY_FREE, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr28ENSURES_VIOLATIONMEMORY_LEAK, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr24ASSERT_VIOLATIONMEMORY_FREE, mainErr26ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-20 06:19:14,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:19:14,990 INFO L82 PathProgramCache]: Analyzing trace with hash -514536618, now seen corresponding path program 1 times [2020-10-20 06:19:14,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:19:14,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586597272] [2020-10-20 06:19:14,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:19:15,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:19:15,030 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:19:15,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:19:15,053 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:19:15,126 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:19:15,127 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 06:19:15,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-20 06:19:15,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 06:19:15 BoogieIcfgContainer [2020-10-20 06:19:15,189 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 06:19:15,189 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 06:19:15,190 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 06:19:15,190 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 06:19:15,190 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:19:10" (3/4) ... [2020-10-20 06:19:15,193 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 06:19:15,244 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 06:19:15,245 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 06:19:15,247 INFO L168 Benchmark]: Toolchain (without parser) took 6540.41 ms. Allocated memory was 38.3 MB in the beginning and 88.1 MB in the end (delta: 49.8 MB). Free memory was 19.8 MB in the beginning and 11.2 MB in the end (delta: 8.7 MB). Peak memory consumption was 58.5 MB. Max. memory is 14.3 GB. [2020-10-20 06:19:15,248 INFO L168 Benchmark]: CDTParser took 1.36 ms. Allocated memory is still 35.1 MB. Free memory is still 11.8 MB. There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 06:19:15,249 INFO L168 Benchmark]: CACSL2BoogieTranslator took 664.37 ms. Allocated memory was 38.3 MB in the beginning and 48.2 MB in the end (delta: 10.0 MB). Free memory was 18.9 MB in the beginning and 30.6 MB in the end (delta: -11.7 MB). Peak memory consumption was 17.8 MB. Max. memory is 14.3 GB. [2020-10-20 06:19:15,249 INFO L168 Benchmark]: Boogie Preprocessor took 95.78 ms. Allocated memory is still 48.2 MB. Free memory was 30.6 MB in the beginning and 27.4 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 14.3 GB. [2020-10-20 06:19:15,250 INFO L168 Benchmark]: RCFGBuilder took 698.37 ms. Allocated memory was 48.2 MB in the beginning and 51.4 MB in the end (delta: 3.1 MB). Free memory was 27.4 MB in the beginning and 13.4 MB in the end (delta: 14.0 MB). Peak memory consumption was 17.1 MB. Max. memory is 14.3 GB. [2020-10-20 06:19:15,251 INFO L168 Benchmark]: TraceAbstraction took 5015.72 ms. Allocated memory was 51.4 MB in the beginning and 88.1 MB in the end (delta: 36.7 MB). Free memory was 13.0 MB in the beginning and 14.5 MB in the end (delta: -1.5 MB). Peak memory consumption was 35.2 MB. Max. memory is 14.3 GB. [2020-10-20 06:19:15,251 INFO L168 Benchmark]: Witness Printer took 55.28 ms. Allocated memory is still 88.1 MB. Free memory was 14.5 MB in the beginning and 11.2 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 14.3 GB. [2020-10-20 06:19:15,255 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.36 ms. Allocated memory is still 35.1 MB. Free memory is still 11.8 MB. There was no memory consumed. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 664.37 ms. Allocated memory was 38.3 MB in the beginning and 48.2 MB in the end (delta: 10.0 MB). Free memory was 18.9 MB in the beginning and 30.6 MB in the end (delta: -11.7 MB). Peak memory consumption was 17.8 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 95.78 ms. Allocated memory is still 48.2 MB. Free memory was 30.6 MB in the beginning and 27.4 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 14.3 GB. * RCFGBuilder took 698.37 ms. Allocated memory was 48.2 MB in the beginning and 51.4 MB in the end (delta: 3.1 MB). Free memory was 27.4 MB in the beginning and 13.4 MB in the end (delta: 14.0 MB). Peak memory consumption was 17.1 MB. Max. memory is 14.3 GB. * TraceAbstraction took 5015.72 ms. Allocated memory was 51.4 MB in the beginning and 88.1 MB in the end (delta: 36.7 MB). Free memory was 13.0 MB in the beginning and 14.5 MB in the end (delta: -1.5 MB). Peak memory consumption was 35.2 MB. Max. memory is 14.3 GB. * Witness Printer took 55.28 ms. Allocated memory is still 88.1 MB. Free memory was 14.5 MB in the beginning and 11.2 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L532] int flag = 1; [L533] List a = (List) malloc(sizeof(struct node)); VAL [a={1:0}, flag=1, malloc(sizeof(struct node))={1:0}] [L534] COND FALSE !(a == 0) VAL [a={1:0}, flag=1, malloc(sizeof(struct node))={1:0}] [L535] List t; [L536] List p = a; VAL [a={1:0}, flag=1, malloc(sizeof(struct node))={1:0}, p={1:0}] [L537] COND TRUE __VERIFIER_nondet_int() [L538] COND TRUE \read(flag) VAL [a={1:0}, flag=1, malloc(sizeof(struct node))={1:0}, p={1:0}] [L539] p->h = 2 VAL [a={1:0}, flag=1, malloc(sizeof(struct node))={1:0}, p={1:0}] [L540] flag = 0 VAL [a={1:0}, flag=0, malloc(sizeof(struct node))={1:0}, p={1:0}] [L545] t = (List) malloc(sizeof(struct node)) VAL [a={1:0}, flag=0, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={1:0}, p={1:0}, t={-1:0}] [L546] COND FALSE !(t == 0) VAL [a={1:0}, flag=0, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={1:0}, p={1:0}, t={-1:0}] [L547] p->n = t VAL [a={1:0}, flag=0, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={1:0}, p={1:0}, t={-1:0}] [L548] EXPR p->n VAL [a={1:0}, flag=0, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={1:0}, p={1:0}, p->n={-1:0}, t={-1:0}] [L548] p = p->n [L537] COND FALSE !(__VERIFIER_nondet_int()) [L550] p->h = 3 VAL [a={1:0}, flag=0, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={1:0}, p={-1:0}, t={-1:0}] [L551] p = a [L552] flag = 1 VAL [a={1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={1:0}, p={1:0}, t={-1:0}] [L553] EXPR p->h VAL [a={1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={1:0}, p={1:0}, p->h=2, t={-1:0}] [L553] COND TRUE p->h != 3 [L554] COND TRUE \read(flag) [L555] flag = 0 VAL [a={1:0}, flag=0, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={1:0}, p={1:0}, t={-1:0}] [L556] EXPR p->h VAL [a={1:0}, flag=0, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={1:0}, p={1:0}, p->h=2, t={-1:0}] [L556] COND TRUE p->h != 1 [L573] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "alternating_list-2.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 102 locations, 30 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.8s, OverallIterations: 14, TraceHistogramMax: 2, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 754 SDtfs, 1007 SDslu, 1083 SDs, 0 SdLazy, 2114 SolverSat, 147 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 106 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=112occurred in iteration=9, 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, 13 MinimizatonAttempts, 189 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 270 NumberOfCodeBlocks, 270 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 227 ConstructedInterpolants, 0 QuantifiedInterpolants, 18775 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 13 PerfectInterpolantSequences, 5/5 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...