./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3 --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 3589167bbf5d7f5cd80f4f92aa27b7dbe19a0217 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-memcleanup) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:57:49,507 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:57:49,510 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:57:49,565 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:57:49,566 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:57:49,571 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:57:49,573 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:57:49,575 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:57:49,578 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:57:49,579 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:57:49,580 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:57:49,582 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:57:49,582 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:57:49,584 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:57:49,585 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:57:49,587 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:57:49,588 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:57:49,589 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:57:49,591 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:57:49,594 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:57:49,596 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:57:49,602 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:57:49,604 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:57:49,605 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:57:49,613 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:57:49,614 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:57:49,614 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:57:49,617 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:57:49,618 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:57:49,620 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:57:49,621 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:57:49,622 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:57:49,624 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:57:49,625 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:57:49,627 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:57:49,627 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:57:49,628 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:57:49,629 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:57:49,629 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:57:49,630 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:57:49,631 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:57:49,632 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2021-10-15 19:57:49,684 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:57:49,685 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:57:49,685 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:57:49,686 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:57:49,694 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:57:49,694 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:57:49,695 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:57:49,695 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:57:49,695 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:57:49,695 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-15 19:57:49,697 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:57:49,697 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:57:49,697 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:57:49,697 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-15 19:57:49,697 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-15 19:57:49,698 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:57:49,698 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-15 19:57:49,698 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:57:49,698 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:57:49,699 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:57:49,699 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:57:49,699 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:57:49,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:57:49,700 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:57:49,700 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:57:49,700 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:57:49,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:57:49,700 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:57:49,701 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3589167bbf5d7f5cd80f4f92aa27b7dbe19a0217 [2021-10-15 19:57:50,017 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:57:50,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:57:50,065 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:57:50,067 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:57:50,068 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:57:50,069 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i [2021-10-15 19:57:50,166 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/data/dd010528c/c783b822811945f4b4195b3a87a3255a/FLAGc23f429d5 [2021-10-15 19:57:50,694 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:57:50,694 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i [2021-10-15 19:57:50,721 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/data/dd010528c/c783b822811945f4b4195b3a87a3255a/FLAGc23f429d5 [2021-10-15 19:57:51,016 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/data/dd010528c/c783b822811945f4b4195b3a87a3255a [2021-10-15 19:57:51,019 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:57:51,021 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-15 19:57:51,022 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:57:51,023 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:57:51,027 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:57:51,028 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:57:51" (1/1) ... [2021-10-15 19:57:51,029 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ba67af2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:57:51, skipping insertion in model container [2021-10-15 19:57:51,029 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:57:51" (1/1) ... [2021-10-15 19:57:51,037 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:57:51,089 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:57:51,440 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i[23818,23831] [2021-10-15 19:57:51,445 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:57:51,459 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:57:51,523 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i[23818,23831] [2021-10-15 19:57:51,524 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:57:51,561 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:57:51,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:57:51 WrapperNode [2021-10-15 19:57:51,562 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:57:51,563 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:57:51,563 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:57:51,564 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:57:51,578 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:57:51" (1/1) ... [2021-10-15 19:57:51,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:57:51" (1/1) ... [2021-10-15 19:57:51,598 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:57:51" (1/1) ... [2021-10-15 19:57:51,598 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:57:51" (1/1) ... [2021-10-15 19:57:51,624 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:57:51" (1/1) ... [2021-10-15 19:57:51,640 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:57:51" (1/1) ... [2021-10-15 19:57:51,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:57:51" (1/1) ... [2021-10-15 19:57:51,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:57:51,653 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:57:51,654 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:57:51,654 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:57:51,655 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:57:51" (1/1) ... [2021-10-15 19:57:51,676 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:57:51,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:57:51,704 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:57:51,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:57:51,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-15 19:57:51,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:57:51,749 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-15 19:57:51,749 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-15 19:57:51,749 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-15 19:57:51,749 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-15 19:57:51,750 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2021-10-15 19:57:51,750 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2021-10-15 19:57:51,750 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2021-10-15 19:57:51,750 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-15 19:57:51,750 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-15 19:57:51,751 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-15 19:57:51,751 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-15 19:57:51,751 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-15 19:57:51,751 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-15 19:57:51,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:57:51,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-15 19:57:51,751 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-15 19:57:51,752 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-15 19:57:51,752 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-15 19:57:51,752 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-15 19:57:51,752 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-15 19:57:51,752 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-15 19:57:51,754 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-15 19:57:51,754 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-15 19:57:51,754 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-15 19:57:51,754 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-15 19:57:51,755 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-15 19:57:51,755 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-15 19:57:51,755 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-15 19:57:51,755 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-15 19:57:51,755 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-15 19:57:51,755 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-15 19:57:51,755 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-15 19:57:51,755 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-15 19:57:51,755 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-15 19:57:51,755 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-15 19:57:51,755 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-15 19:57:51,755 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-15 19:57:51,756 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-15 19:57:51,756 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-15 19:57:51,756 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-15 19:57:51,756 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-15 19:57:51,756 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-15 19:57:51,756 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-15 19:57:51,756 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-15 19:57:51,756 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-15 19:57:51,756 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-15 19:57:51,757 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-15 19:57:51,757 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-15 19:57:51,757 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-15 19:57:51,757 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-15 19:57:51,757 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-15 19:57:51,757 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-15 19:57:51,757 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-15 19:57:51,758 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-15 19:57:51,758 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-15 19:57:51,758 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-15 19:57:51,758 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-15 19:57:51,758 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-15 19:57:51,758 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-15 19:57:51,758 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-15 19:57:51,759 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-15 19:57:51,759 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-15 19:57:51,759 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-15 19:57:51,759 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-15 19:57:51,759 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-15 19:57:51,759 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-15 19:57:51,759 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-15 19:57:51,760 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-15 19:57:51,760 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-15 19:57:51,760 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-15 19:57:51,760 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-15 19:57:51,760 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-15 19:57:51,764 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-15 19:57:51,764 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-15 19:57:51,765 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-15 19:57:51,765 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-15 19:57:51,765 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-15 19:57:51,766 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-15 19:57:51,766 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-15 19:57:51,766 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-15 19:57:51,766 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-15 19:57:51,766 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-15 19:57:51,766 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-15 19:57:51,766 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-15 19:57:51,767 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-15 19:57:51,767 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-15 19:57:51,767 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-15 19:57:51,767 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-15 19:57:51,767 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-15 19:57:51,767 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-15 19:57:51,767 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-15 19:57:51,767 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-15 19:57:51,768 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-15 19:57:51,768 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-15 19:57:51,768 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-15 19:57:51,768 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-15 19:57:51,768 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-15 19:57:51,768 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-15 19:57:51,768 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-15 19:57:51,769 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-15 19:57:51,769 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-15 19:57:51,769 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-15 19:57:51,769 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-15 19:57:51,769 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-15 19:57:51,769 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-15 19:57:51,769 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-15 19:57:51,769 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-15 19:57:51,770 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-15 19:57:51,770 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-15 19:57:51,770 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-15 19:57:51,770 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-15 19:57:51,770 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-15 19:57:51,770 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-15 19:57:51,770 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-15 19:57:51,770 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-15 19:57:51,771 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-15 19:57:51,771 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-15 19:57:51,771 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-15 19:57:51,771 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-15 19:57:51,771 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-15 19:57:51,771 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2021-10-15 19:57:51,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-15 19:57:51,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-15 19:57:51,772 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2021-10-15 19:57:51,772 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-15 19:57:51,772 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2021-10-15 19:57:51,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-15 19:57:51,772 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-15 19:57:51,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-15 19:57:51,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:57:51,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:57:51,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-15 19:57:51,773 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-15 19:57:52,127 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-15 19:57:52,314 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:57:52,314 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-15 19:57:52,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:57:52 BoogieIcfgContainer [2021-10-15 19:57:52,316 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:57:52,319 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:57:52,319 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:57:52,322 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:57:52,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:57:51" (1/3) ... [2021-10-15 19:57:52,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2493e3dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:57:52, skipping insertion in model container [2021-10-15 19:57:52,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:57:51" (2/3) ... [2021-10-15 19:57:52,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2493e3dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:57:52, skipping insertion in model container [2021-10-15 19:57:52,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:57:52" (3/3) ... [2021-10-15 19:57:52,326 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_length_check-1.i [2021-10-15 19:57:52,332 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:57:52,332 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2021-10-15 19:57:52,379 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:57:52,385 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-15 19:57:52,385 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-10-15 19:57:52,400 INFO L276 IsEmpty]: Start isEmpty. Operand has 59 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 47 states have internal predecessors, (58), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-15 19:57:52,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-15 19:57:52,408 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:57:52,409 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:57:52,409 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting sll_createErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-15 19:57:52,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:57:52,415 INFO L82 PathProgramCache]: Analyzing trace with hash 116076339, now seen corresponding path program 1 times [2021-10-15 19:57:52,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:57:52,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205996535] [2021-10-15 19:57:52,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:57:52,424 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:57:52,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:52,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:57:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:52,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:57:52,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:57:52,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205996535] [2021-10-15 19:57:52,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205996535] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:57:52,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:57:52,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:57:52,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855974461] [2021-10-15 19:57:52,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:57:52,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:57:52,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:57:52,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:57:52,651 INFO L87 Difference]: Start difference. First operand has 59 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 47 states have internal predecessors, (58), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:57:52,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:57:52,904 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2021-10-15 19:57:52,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:57:52,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-10-15 19:57:52,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:57:52,916 INFO L225 Difference]: With dead ends: 86 [2021-10-15 19:57:52,916 INFO L226 Difference]: Without dead ends: 77 [2021-10-15 19:57:52,918 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:57:52,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-10-15 19:57:52,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 65. [2021-10-15 19:57:52,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 53 states have internal predecessors, (59), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-15 19:57:52,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 74 transitions. [2021-10-15 19:57:52,980 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 74 transitions. Word has length 12 [2021-10-15 19:57:52,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:57:52,981 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 74 transitions. [2021-10-15 19:57:52,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:57:52,981 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 74 transitions. [2021-10-15 19:57:52,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-15 19:57:52,982 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:57:52,983 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:57:52,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:57:52,984 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting sll_createErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-15 19:57:52,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:57:52,989 INFO L82 PathProgramCache]: Analyzing trace with hash -153533958, now seen corresponding path program 1 times [2021-10-15 19:57:52,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:57:52,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271284261] [2021-10-15 19:57:52,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:57:52,990 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:57:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:53,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:57:53,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:53,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:57:53,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:57:53,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271284261] [2021-10-15 19:57:53,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271284261] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:57:53,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:57:53,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:57:53,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58427704] [2021-10-15 19:57:53,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:57:53,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:57:53,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:57:53,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:57:53,109 INFO L87 Difference]: Start difference. First operand 65 states and 74 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:57:53,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:57:53,319 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2021-10-15 19:57:53,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:57:53,320 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-10-15 19:57:53,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:57:53,326 INFO L225 Difference]: With dead ends: 76 [2021-10-15 19:57:53,326 INFO L226 Difference]: Without dead ends: 76 [2021-10-15 19:57:53,326 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:57:53,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-10-15 19:57:53,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 64. [2021-10-15 19:57:53,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 52 states have internal predecessors, (58), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-15 19:57:53,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2021-10-15 19:57:53,354 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 14 [2021-10-15 19:57:53,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:57:53,354 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2021-10-15 19:57:53,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:57:53,355 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2021-10-15 19:57:53,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-15 19:57:53,355 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:57:53,355 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:57:53,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:57:53,356 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting sll_createErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-15 19:57:53,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:57:53,356 INFO L82 PathProgramCache]: Analyzing trace with hash -153533957, now seen corresponding path program 1 times [2021-10-15 19:57:53,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:57:53,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117673683] [2021-10-15 19:57:53,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:57:53,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:57:53,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:53,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:57:53,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:53,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:57:53,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:57:53,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117673683] [2021-10-15 19:57:53,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117673683] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:57:53,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:57:53,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:57:53,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879986271] [2021-10-15 19:57:53,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:57:53,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:57:53,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:57:53,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:57:53,511 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:57:53,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:57:53,703 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2021-10-15 19:57:53,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:57:53,704 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-10-15 19:57:53,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:57:53,706 INFO L225 Difference]: With dead ends: 75 [2021-10-15 19:57:53,706 INFO L226 Difference]: Without dead ends: 75 [2021-10-15 19:57:53,706 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:57:53,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-15 19:57:53,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 63. [2021-10-15 19:57:53,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 51 states have internal predecessors, (57), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-15 19:57:53,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2021-10-15 19:57:53,729 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 14 [2021-10-15 19:57:53,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:57:53,730 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2021-10-15 19:57:53,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 19:57:53,730 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2021-10-15 19:57:53,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-15 19:57:53,731 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:57:53,731 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:57:53,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:57:53,732 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting sll_lengthErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-15 19:57:53,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:57:53,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1624967577, now seen corresponding path program 1 times [2021-10-15 19:57:53,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:57:53,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705463711] [2021-10-15 19:57:53,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:57:53,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:57:53,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:53,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:57:53,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:53,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-15 19:57:53,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:54,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:57:54,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:57:54,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705463711] [2021-10-15 19:57:54,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705463711] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:57:54,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:57:54,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-15 19:57:54,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445878650] [2021-10-15 19:57:54,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 19:57:54,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:57:54,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 19:57:54,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-10-15 19:57:54,016 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-15 19:57:54,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:57:54,625 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2021-10-15 19:57:54,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 19:57:54,627 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-10-15 19:57:54,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:57:54,628 INFO L225 Difference]: With dead ends: 86 [2021-10-15 19:57:54,628 INFO L226 Difference]: Without dead ends: 86 [2021-10-15 19:57:54,628 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 404.9ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-10-15 19:57:54,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-10-15 19:57:54,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 68. [2021-10-15 19:57:54,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 55 states have internal predecessors, (61), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-15 19:57:54,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2021-10-15 19:57:54,644 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 20 [2021-10-15 19:57:54,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:57:54,646 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2021-10-15 19:57:54,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-15 19:57:54,647 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2021-10-15 19:57:54,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-15 19:57:54,648 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:57:54,649 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:57:54,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 19:57:54,649 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting sll_lengthErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-15 19:57:54,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:57:54,650 INFO L82 PathProgramCache]: Analyzing trace with hash 454825470, now seen corresponding path program 1 times [2021-10-15 19:57:54,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:57:54,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917968625] [2021-10-15 19:57:54,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:57:54,651 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:57:54,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:54,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:57:54,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:54,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-15 19:57:54,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:54,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:57:54,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:57:54,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917968625] [2021-10-15 19:57:54,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917968625] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:57:54,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:57:54,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-15 19:57:54,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933313904] [2021-10-15 19:57:54,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 19:57:54,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:57:54,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 19:57:54,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-10-15 19:57:54,820 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 11 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-15 19:57:55,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:57:55,349 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2021-10-15 19:57:55,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 19:57:55,350 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-10-15 19:57:55,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:57:55,352 INFO L225 Difference]: With dead ends: 92 [2021-10-15 19:57:55,353 INFO L226 Difference]: Without dead ends: 92 [2021-10-15 19:57:55,353 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 164.2ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-10-15 19:57:55,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-15 19:57:55,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 70. [2021-10-15 19:57:55,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 57 states have internal predecessors, (65), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-15 19:57:55,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2021-10-15 19:57:55,362 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 24 [2021-10-15 19:57:55,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:57:55,363 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2021-10-15 19:57:55,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-15 19:57:55,363 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2021-10-15 19:57:55,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-15 19:57:55,364 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:57:55,365 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:57:55,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 19:57:55,365 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting sll_lengthErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-15 19:57:55,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:57:55,366 INFO L82 PathProgramCache]: Analyzing trace with hash 454825471, now seen corresponding path program 1 times [2021-10-15 19:57:55,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:57:55,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096828929] [2021-10-15 19:57:55,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:57:55,367 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:57:55,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:55,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:57:55,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:55,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-15 19:57:55,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:55,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:57:55,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:57:55,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096828929] [2021-10-15 19:57:55,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096828929] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:57:55,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548557485] [2021-10-15 19:57:55,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:57:55,484 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:57:55,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:57:55,489 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:57:55,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:57:55,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:55,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 19:57:55,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:57:55,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:57:55,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548557485] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:57:55,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:57:55,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2021-10-15 19:57:55,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636390164] [2021-10-15 19:57:55,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 19:57:55,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:57:55,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 19:57:55,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-15 19:57:55,781 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-15 19:57:56,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:57:56,237 INFO L93 Difference]: Finished difference Result 94 states and 106 transitions. [2021-10-15 19:57:56,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 19:57:56,239 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 24 [2021-10-15 19:57:56,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:57:56,240 INFO L225 Difference]: With dead ends: 94 [2021-10-15 19:57:56,240 INFO L226 Difference]: Without dead ends: 88 [2021-10-15 19:57:56,241 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 260.2ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-10-15 19:57:56,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-15 19:57:56,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 58. [2021-10-15 19:57:56,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 40 states have (on average 1.375) internal successors, (55), 48 states have internal predecessors, (55), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-15 19:57:56,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2021-10-15 19:57:56,252 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 24 [2021-10-15 19:57:56,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:57:56,252 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2021-10-15 19:57:56,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-15 19:57:56,253 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2021-10-15 19:57:56,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-15 19:57:56,254 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:57:56,254 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:57:56,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:57:56,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:57:56,476 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting sll_lengthErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-15 19:57:56,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:57:56,476 INFO L82 PathProgramCache]: Analyzing trace with hash -2135191018, now seen corresponding path program 2 times [2021-10-15 19:57:56,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:57:56,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216831493] [2021-10-15 19:57:56,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:57:56,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:57:56,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:56,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:57:56,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:56,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-15 19:57:56,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:56,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:57:56,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:57:56,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216831493] [2021-10-15 19:57:56,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216831493] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:57:56,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692609548] [2021-10-15 19:57:56,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:57:56,645 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:57:56,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:57:56,646 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:57:56,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:57:56,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:57:56,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:57:56,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-15 19:57:56,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:57:56,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:57:56,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692609548] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:57:56,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:57:56,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2021-10-15 19:57:56,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451824699] [2021-10-15 19:57:56,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 19:57:56,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:57:56,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 19:57:56,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-10-15 19:57:56,970 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-15 19:57:57,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:57:57,365 INFO L93 Difference]: Finished difference Result 95 states and 107 transitions. [2021-10-15 19:57:57,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 19:57:57,366 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-10-15 19:57:57,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:57:57,368 INFO L225 Difference]: With dead ends: 95 [2021-10-15 19:57:57,368 INFO L226 Difference]: Without dead ends: 92 [2021-10-15 19:57:57,368 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 193.0ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-10-15 19:57:57,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-15 19:57:57,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 62. [2021-10-15 19:57:57,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 52 states have internal predecessors, (59), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-15 19:57:57,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2021-10-15 19:57:57,373 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 28 [2021-10-15 19:57:57,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:57:57,373 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2021-10-15 19:57:57,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-15 19:57:57,373 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2021-10-15 19:57:57,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-15 19:57:57,375 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:57:57,375 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:57:57,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:57:57,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-15 19:57:57,600 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting sll_lengthErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-15 19:57:57,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:57:57,600 INFO L82 PathProgramCache]: Analyzing trace with hash -746509651, now seen corresponding path program 3 times [2021-10-15 19:57:57,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:57:57,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465350560] [2021-10-15 19:57:57,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:57:57,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:57:57,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:57,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:57:57,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:57,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-15 19:57:57,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:57,812 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-15 19:57:57,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:57:57,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465350560] [2021-10-15 19:57:57,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465350560] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:57:57,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:57:57,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-15 19:57:57,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74739854] [2021-10-15 19:57:57,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 19:57:57,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:57:57,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 19:57:57,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-10-15 19:57:57,816 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-15 19:57:58,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:57:58,257 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2021-10-15 19:57:58,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 19:57:58,257 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2021-10-15 19:57:58,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:57:58,258 INFO L225 Difference]: With dead ends: 79 [2021-10-15 19:57:58,258 INFO L226 Difference]: Without dead ends: 79 [2021-10-15 19:57:58,259 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 229.6ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-10-15 19:57:58,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-15 19:57:58,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 62. [2021-10-15 19:57:58,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 52 states have internal predecessors, (58), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-15 19:57:58,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2021-10-15 19:57:58,262 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 32 [2021-10-15 19:57:58,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:57:58,263 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2021-10-15 19:57:58,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-15 19:57:58,263 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2021-10-15 19:57:58,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-15 19:57:58,264 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:57:58,264 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:57:58,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-15 19:57:58,264 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting sll_lengthErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-15 19:57:58,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:57:58,265 INFO L82 PathProgramCache]: Analyzing trace with hash 71636682, now seen corresponding path program 1 times [2021-10-15 19:57:58,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:57:58,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139024939] [2021-10-15 19:57:58,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:57:58,266 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:57:58,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:58,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:57:58,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:58,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-15 19:57:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:58,558 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-15 19:57:58,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:57:58,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139024939] [2021-10-15 19:57:58,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139024939] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:57:58,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469286791] [2021-10-15 19:57:58,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:57:58,560 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:57:58,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:57:58,564 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:57:58,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:57:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:58,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-15 19:57:58,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:57:58,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-15 19:57:58,836 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-15 19:57:58,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-10-15 19:57:58,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-15 19:57:59,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-10-15 19:57:59,247 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 19:57:59,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469286791] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:57:59,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:57:59,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 23 [2021-10-15 19:57:59,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142411686] [2021-10-15 19:57:59,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-15 19:57:59,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:57:59,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-15 19:57:59,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-10-15 19:57:59,252 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand has 24 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 18 states have internal predecessors, (43), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-15 19:58:00,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:58:00,075 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2021-10-15 19:58:00,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-15 19:58:00,076 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 18 states have internal predecessors, (43), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2021-10-15 19:58:00,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:58:00,077 INFO L225 Difference]: With dead ends: 88 [2021-10-15 19:58:00,077 INFO L226 Difference]: Without dead ends: 88 [2021-10-15 19:58:00,078 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 613.9ms TimeCoverageRelationStatistics Valid=159, Invalid=963, Unknown=0, NotChecked=0, Total=1122 [2021-10-15 19:58:00,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-15 19:58:00,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 65. [2021-10-15 19:58:00,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 55 states have internal predecessors, (63), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-15 19:58:00,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2021-10-15 19:58:00,082 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 35 [2021-10-15 19:58:00,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:58:00,082 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2021-10-15 19:58:00,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 18 states have internal predecessors, (43), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-15 19:58:00,082 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2021-10-15 19:58:00,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-15 19:58:00,084 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:58:00,084 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:58:00,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-10-15 19:58:00,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-10-15 19:58:00,304 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting sll_lengthErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-15 19:58:00,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:58:00,304 INFO L82 PathProgramCache]: Analyzing trace with hash 71636683, now seen corresponding path program 1 times [2021-10-15 19:58:00,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:58:00,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234021586] [2021-10-15 19:58:00,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:58:00,304 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:58:00,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:58:00,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:58:00,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:58:00,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-15 19:58:00,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:58:00,643 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 19:58:00,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:58:00,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234021586] [2021-10-15 19:58:00,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234021586] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:58:00,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685261603] [2021-10-15 19:58:00,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:58:00,647 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:58:00,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:58:00,649 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:58:00,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 19:58:00,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:58:00,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 46 conjunts are in the unsatisfiable core [2021-10-15 19:58:00,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:58:00,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-15 19:58:00,924 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-15 19:58:00,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-10-15 19:58:00,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 19:58:00,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-15 19:58:01,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-10-15 19:58:01,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-10-15 19:58:01,422 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 19:58:01,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685261603] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:58:01,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:58:01,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-10-15 19:58:01,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862576078] [2021-10-15 19:58:01,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-15 19:58:01,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:58:01,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-15 19:58:01,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-10-15 19:58:01,425 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 23 states, 20 states have (on average 2.1) internal successors, (42), 17 states have internal predecessors, (42), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-15 19:58:02,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:58:02,259 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2021-10-15 19:58:02,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-15 19:58:02,259 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 2.1) internal successors, (42), 17 states have internal predecessors, (42), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2021-10-15 19:58:02,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:58:02,260 INFO L225 Difference]: With dead ends: 85 [2021-10-15 19:58:02,260 INFO L226 Difference]: Without dead ends: 85 [2021-10-15 19:58:02,261 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 706.0ms TimeCoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2021-10-15 19:58:02,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-10-15 19:58:02,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 65. [2021-10-15 19:58:02,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.3191489361702127) internal successors, (62), 55 states have internal predecessors, (62), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-15 19:58:02,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2021-10-15 19:58:02,265 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 35 [2021-10-15 19:58:02,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:58:02,266 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2021-10-15 19:58:02,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 2.1) internal successors, (42), 17 states have internal predecessors, (42), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-15 19:58:02,266 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2021-10-15 19:58:02,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-15 19:58:02,267 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:58:02,268 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-10-15 19:58:02,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:58:02,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:58:02,480 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-15 19:58:02,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:58:02,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1444078125, now seen corresponding path program 1 times [2021-10-15 19:58:02,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:58:02,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404356062] [2021-10-15 19:58:02,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:58:02,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:58:02,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:58:02,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:58:02,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:58:02,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-15 19:58:02,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:58:02,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-10-15 19:58:02,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:58:02,643 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-15 19:58:02,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:58:02,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404356062] [2021-10-15 19:58:02,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404356062] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:58:02,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:58:02,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-15 19:58:02,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21852006] [2021-10-15 19:58:02,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 19:58:02,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:58:02,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 19:58:02,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-10-15 19:58:02,646 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 11 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-15 19:58:03,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:58:03,005 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2021-10-15 19:58:03,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 19:58:03,005 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2021-10-15 19:58:03,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:58:03,006 INFO L225 Difference]: With dead ends: 81 [2021-10-15 19:58:03,006 INFO L226 Difference]: Without dead ends: 78 [2021-10-15 19:58:03,007 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 172.9ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-10-15 19:58:03,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-15 19:58:03,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 65. [2021-10-15 19:58:03,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.297872340425532) internal successors, (61), 55 states have internal predecessors, (61), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-15 19:58:03,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2021-10-15 19:58:03,011 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 37 [2021-10-15 19:58:03,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:58:03,012 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2021-10-15 19:58:03,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-15 19:58:03,012 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2021-10-15 19:58:03,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-15 19:58:03,017 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:58:03,017 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:58:03,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-15 19:58:03,017 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting sll_lengthErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-15 19:58:03,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:58:03,018 INFO L82 PathProgramCache]: Analyzing trace with hash -470331924, now seen corresponding path program 2 times [2021-10-15 19:58:03,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:58:03,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376335016] [2021-10-15 19:58:03,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:58:03,019 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:58:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:58:03,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:58:03,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:58:03,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-15 19:58:03,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:58:03,387 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:58:03,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:58:03,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376335016] [2021-10-15 19:58:03,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376335016] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:58:03,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474751628] [2021-10-15 19:58:03,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:58:03,388 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:58:03,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:58:03,392 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:58:03,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 19:58:03,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:58:03,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:58:03,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 57 conjunts are in the unsatisfiable core [2021-10-15 19:58:03,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:58:03,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-15 19:58:03,661 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-15 19:58:03,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-15 19:58:03,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-15 19:58:03,842 INFO L354 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2021-10-15 19:58:03,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2021-10-15 19:58:03,988 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-15 19:58:03,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 37 [2021-10-15 19:58:04,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 19:58:04,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 69 [2021-10-15 19:58:04,843 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-15 19:58:04,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 34 [2021-10-15 19:58:05,076 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:58:05,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474751628] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:58:05,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:58:05,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 34 [2021-10-15 19:58:05,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410464130] [2021-10-15 19:58:05,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-15 19:58:05,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:58:05,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-15 19:58:05,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2021-10-15 19:58:05,080 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 35 states, 32 states have (on average 1.8125) internal successors, (58), 29 states have internal predecessors, (58), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-15 19:58:06,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:58:06,834 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2021-10-15 19:58:06,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-15 19:58:06,835 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.8125) internal successors, (58), 29 states have internal predecessors, (58), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2021-10-15 19:58:06,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:58:06,836 INFO L225 Difference]: With dead ends: 94 [2021-10-15 19:58:06,836 INFO L226 Difference]: Without dead ends: 94 [2021-10-15 19:58:06,838 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1657.4ms TimeCoverageRelationStatistics Valid=296, Invalid=2154, Unknown=0, NotChecked=0, Total=2450 [2021-10-15 19:58:06,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-15 19:58:06,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 68. [2021-10-15 19:58:06,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 50 states have (on average 1.32) internal successors, (66), 58 states have internal predecessors, (66), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-15 19:58:06,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2021-10-15 19:58:06,844 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 38 [2021-10-15 19:58:06,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:58:06,844 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2021-10-15 19:58:06,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.8125) internal successors, (58), 29 states have internal predecessors, (58), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-15 19:58:06,845 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2021-10-15 19:58:06,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-15 19:58:06,856 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:58:06,859 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:58:06,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 19:58:07,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:58:07,085 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting sll_lengthErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-15 19:58:07,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:58:07,086 INFO L82 PathProgramCache]: Analyzing trace with hash -470331923, now seen corresponding path program 2 times [2021-10-15 19:58:07,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:58:07,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47134476] [2021-10-15 19:58:07,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:58:07,086 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:58:07,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:58:07,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:58:07,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:58:07,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-15 19:58:07,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:58:07,636 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:58:07,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:58:07,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47134476] [2021-10-15 19:58:07,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47134476] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:58:07,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20929120] [2021-10-15 19:58:07,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:58:07,637 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:58:07,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:58:07,640 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:58:07,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 19:58:07,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:58:07,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:58:07,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 67 conjunts are in the unsatisfiable core [2021-10-15 19:58:07,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:58:07,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-15 19:58:08,129 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-15 19:58:08,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-15 19:58:08,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-10-15 19:58:08,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2021-10-15 19:58:08,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2021-10-15 19:58:08,462 INFO L354 Elim1Store]: treesize reduction 32, result has 41.8 percent of original size [2021-10-15 19:58:08,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 40 [2021-10-15 19:58:08,503 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-10-15 19:58:08,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2021-10-15 19:58:08,665 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-15 19:58:08,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 61 [2021-10-15 19:58:08,680 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-15 19:58:08,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 82 [2021-10-15 19:58:09,858 INFO L354 Elim1Store]: treesize reduction 29, result has 21.6 percent of original size [2021-10-15 19:58:09,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 68 [2021-10-15 19:58:09,875 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-10-15 19:58:09,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 45 [2021-10-15 19:58:10,196 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:58:10,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20929120] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:58:10,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:58:10,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 39 [2021-10-15 19:58:10,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780100496] [2021-10-15 19:58:10,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-15 19:58:10,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:58:10,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-15 19:58:10,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1456, Unknown=0, NotChecked=0, Total=1560 [2021-10-15 19:58:10,200 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand has 40 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 34 states have internal predecessors, (59), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-15 19:58:14,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:58:14,101 INFO L93 Difference]: Finished difference Result 91 states and 98 transitions. [2021-10-15 19:58:14,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-15 19:58:14,102 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 34 states have internal predecessors, (59), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2021-10-15 19:58:14,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:58:14,103 INFO L225 Difference]: With dead ends: 91 [2021-10-15 19:58:14,104 INFO L226 Difference]: Without dead ends: 91 [2021-10-15 19:58:14,105 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 4126.4ms TimeCoverageRelationStatistics Valid=386, Invalid=3154, Unknown=0, NotChecked=0, Total=3540 [2021-10-15 19:58:14,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-10-15 19:58:14,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2021-10-15 19:58:14,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 50 states have (on average 1.3) internal successors, (65), 58 states have internal predecessors, (65), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-15 19:58:14,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2021-10-15 19:58:14,110 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 38 [2021-10-15 19:58:14,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:58:14,110 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2021-10-15 19:58:14,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 34 states have internal predecessors, (59), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-15 19:58:14,111 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2021-10-15 19:58:14,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-15 19:58:14,112 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:58:14,112 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-10-15 19:58:14,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-15 19:58:14,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:58:14,335 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-15 19:58:14,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:58:14,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1710101621, now seen corresponding path program 1 times [2021-10-15 19:58:14,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:58:14,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764884671] [2021-10-15 19:58:14,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:58:14,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:58:14,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:58:14,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:58:14,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:58:14,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-15 19:58:14,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:58:14,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-10-15 19:58:14,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:58:14,614 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 19:58:14,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:58:14,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764884671] [2021-10-15 19:58:14,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764884671] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:58:14,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208378671] [2021-10-15 19:58:14,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:58:14,614 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:58:14,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:58:14,616 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:58:14,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-15 19:58:14,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:58:14,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-15 19:58:14,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:58:15,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-15 19:58:15,458 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 19:58:15,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208378671] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:58:15,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:58:15,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-10-15 19:58:15,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834604436] [2021-10-15 19:58:15,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-15 19:58:15,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:58:15,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-15 19:58:15,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-10-15 19:58:15,460 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 26 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 21 states have internal predecessors, (50), 3 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-15 19:58:22,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:58:22,399 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2021-10-15 19:58:22,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-15 19:58:22,400 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 21 states have internal predecessors, (50), 3 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 40 [2021-10-15 19:58:22,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:58:22,401 INFO L225 Difference]: With dead ends: 84 [2021-10-15 19:58:22,401 INFO L226 Difference]: Without dead ends: 81 [2021-10-15 19:58:22,402 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 680.7ms TimeCoverageRelationStatistics Valid=181, Invalid=1225, Unknown=0, NotChecked=0, Total=1406 [2021-10-15 19:58:22,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-15 19:58:22,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 68. [2021-10-15 19:58:22,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 50 states have (on average 1.28) internal successors, (64), 58 states have internal predecessors, (64), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-15 19:58:22,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2021-10-15 19:58:22,406 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 40 [2021-10-15 19:58:22,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:58:22,406 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2021-10-15 19:58:22,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 21 states have internal predecessors, (50), 3 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-15 19:58:22,406 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2021-10-15 19:58:22,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-15 19:58:22,407 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:58:22,407 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:58:22,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-15 19:58:22,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-15 19:58:22,628 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting sll_lengthErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-15 19:58:22,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:58:22,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1475007606, now seen corresponding path program 3 times [2021-10-15 19:58:22,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:58:22,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579849653] [2021-10-15 19:58:22,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:58:22,629 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:58:22,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:58:23,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:58:23,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:58:23,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-15 19:58:23,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:58:23,634 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:58:23,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:58:23,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579849653] [2021-10-15 19:58:23,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579849653] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:58:23,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210996806] [2021-10-15 19:58:23,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:58:23,635 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:58:23,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:58:23,644 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:58:23,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-15 19:58:24,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-15 19:58:24,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:58:24,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 74 conjunts are in the unsatisfiable core [2021-10-15 19:58:24,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:58:24,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-15 19:58:24,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 19:58:24,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 19:58:24,260 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-15 19:58:24,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-15 19:58:24,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-15 19:58:24,406 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-15 19:58:24,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2021-10-15 19:58:24,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-15 19:58:24,420 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-15 19:58:24,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 50 [2021-10-15 19:58:24,688 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-10-15 19:58:24,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2021-10-15 19:58:24,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-15 19:58:24,849 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-10-15 19:58:24,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 71 [2021-10-15 19:58:24,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-15 19:58:24,880 INFO L354 Elim1Store]: treesize reduction 100, result has 21.3 percent of original size [2021-10-15 19:58:24,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 97 [2021-10-15 19:58:32,626 INFO L354 Elim1Store]: treesize reduction 203, result has 6.5 percent of original size [2021-10-15 19:58:32,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 175 treesize of output 107 [2021-10-15 19:58:32,679 INFO L354 Elim1Store]: treesize reduction 159, result has 5.9 percent of original size [2021-10-15 19:58:32,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 72 treesize of output 58 [2021-10-15 19:58:32,854 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 23 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:58:32,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210996806] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:58:32,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:58:32,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 44 [2021-10-15 19:58:32,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926916901] [2021-10-15 19:58:32,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-15 19:58:32,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:58:32,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-15 19:58:32,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1788, Unknown=4, NotChecked=0, Total=1892 [2021-10-15 19:58:32,858 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 44 states, 42 states have (on average 1.5238095238095237) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-15 19:59:20,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:59:20,857 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2021-10-15 19:59:20,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-15 19:59:20,858 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 1.5238095238095237) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2021-10-15 19:59:20,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:59:20,859 INFO L225 Difference]: With dead ends: 117 [2021-10-15 19:59:20,859 INFO L226 Difference]: Without dead ends: 117 [2021-10-15 19:59:20,861 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 28205.3ms TimeCoverageRelationStatistics Valid=308, Invalid=4236, Unknown=12, NotChecked=0, Total=4556 [2021-10-15 19:59:20,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-10-15 19:59:20,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2021-10-15 19:59:20,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 79 states have internal predecessors, (86), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-15 19:59:20,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2021-10-15 19:59:20,866 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 41 [2021-10-15 19:59:20,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:59:20,867 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2021-10-15 19:59:20,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 1.5238095238095237) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-15 19:59:20,867 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2021-10-15 19:59:20,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-15 19:59:20,868 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:59:20,868 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 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] [2021-10-15 19:59:20,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-15 19:59:21,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-15 19:59:21,084 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-15 19:59:21,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:59:21,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1710554477, now seen corresponding path program 2 times [2021-10-15 19:59:21,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:59:21,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511319687] [2021-10-15 19:59:21,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:59:21,085 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:59:21,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:59:21,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:59:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:59:21,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-15 19:59:21,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:59:21,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-10-15 19:59:21,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:59:21,319 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-15 19:59:21,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:59:21,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511319687] [2021-10-15 19:59:21,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511319687] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:59:21,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18514142] [2021-10-15 19:59:21,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:59:21,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:59:21,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:59:21,322 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:59:21,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-15 19:59:21,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:59:21,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:59:21,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-15 19:59:21,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:59:21,915 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-15 19:59:21,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18514142] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:59:21,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:59:21,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-10-15 19:59:21,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910724126] [2021-10-15 19:59:21,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 19:59:21,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:59:21,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 19:59:21,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-15 19:59:21,917 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-15 19:59:22,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:59:22,299 INFO L93 Difference]: Finished difference Result 128 states and 145 transitions. [2021-10-15 19:59:22,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 19:59:22,300 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2021-10-15 19:59:22,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:59:22,301 INFO L225 Difference]: With dead ends: 128 [2021-10-15 19:59:22,301 INFO L226 Difference]: Without dead ends: 128 [2021-10-15 19:59:22,302 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 234.7ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-10-15 19:59:22,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-15 19:59:22,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 107. [2021-10-15 19:59:22,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 81 states have (on average 1.2222222222222223) internal successors, (99), 92 states have internal predecessors, (99), 9 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2021-10-15 19:59:22,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 122 transitions. [2021-10-15 19:59:22,310 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 122 transitions. Word has length 43 [2021-10-15 19:59:22,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:59:22,311 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 122 transitions. [2021-10-15 19:59:22,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-15 19:59:22,311 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 122 transitions. [2021-10-15 19:59:22,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-15 19:59:22,312 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:59:22,313 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 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] [2021-10-15 19:59:22,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-10-15 19:59:22,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-15 19:59:22,520 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting sll_destroyErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-15 19:59:22,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:59:22,520 INFO L82 PathProgramCache]: Analyzing trace with hash 660848846, now seen corresponding path program 1 times [2021-10-15 19:59:22,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:59:22,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117652399] [2021-10-15 19:59:22,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:59:22,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:59:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:59:22,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:59:22,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:59:22,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-15 19:59:22,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:59:22,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-10-15 19:59:22,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:59:22,678 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-15 19:59:22,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:59:22,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117652399] [2021-10-15 19:59:22,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117652399] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:59:22,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:59:22,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-15 19:59:22,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85523836] [2021-10-15 19:59:22,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 19:59:22,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:59:22,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 19:59:22,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-10-15 19:59:22,682 INFO L87 Difference]: Start difference. First operand 107 states and 122 transitions. Second operand has 11 states, 10 states have (on average 2.9) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-15 19:59:23,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:59:23,024 INFO L93 Difference]: Finished difference Result 120 states and 135 transitions. [2021-10-15 19:59:23,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 19:59:23,027 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2021-10-15 19:59:23,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:59:23,028 INFO L225 Difference]: With dead ends: 120 [2021-10-15 19:59:23,029 INFO L226 Difference]: Without dead ends: 120 [2021-10-15 19:59:23,029 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 166.6ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-10-15 19:59:23,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-10-15 19:59:23,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 108. [2021-10-15 19:59:23,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 83 states have (on average 1.2289156626506024) internal successors, (102), 93 states have internal predecessors, (102), 9 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2021-10-15 19:59:23,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 125 transitions. [2021-10-15 19:59:23,036 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 125 transitions. Word has length 46 [2021-10-15 19:59:23,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:59:23,037 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 125 transitions. [2021-10-15 19:59:23,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-15 19:59:23,037 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 125 transitions. [2021-10-15 19:59:23,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-15 19:59:23,038 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:59:23,038 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 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] [2021-10-15 19:59:23,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-15 19:59:23,039 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting sll_destroyErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-15 19:59:23,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:59:23,039 INFO L82 PathProgramCache]: Analyzing trace with hash 660848847, now seen corresponding path program 1 times [2021-10-15 19:59:23,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:59:23,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176204062] [2021-10-15 19:59:23,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:59:23,039 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:59:23,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:59:23,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:59:23,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:59:23,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-15 19:59:23,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:59:23,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-10-15 19:59:23,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:59:23,252 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-15 19:59:23,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:59:23,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176204062] [2021-10-15 19:59:23,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176204062] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:59:23,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:59:23,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-15 19:59:23,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825364492] [2021-10-15 19:59:23,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 19:59:23,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:59:23,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 19:59:23,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-10-15 19:59:23,257 INFO L87 Difference]: Start difference. First operand 108 states and 125 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-15 19:59:23,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:59:23,686 INFO L93 Difference]: Finished difference Result 115 states and 131 transitions. [2021-10-15 19:59:23,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 19:59:23,687 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2021-10-15 19:59:23,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:59:23,688 INFO L225 Difference]: With dead ends: 115 [2021-10-15 19:59:23,688 INFO L226 Difference]: Without dead ends: 115 [2021-10-15 19:59:23,688 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 232.2ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-10-15 19:59:23,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-10-15 19:59:23,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 110. [2021-10-15 19:59:23,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 85 states have (on average 1.2117647058823529) internal successors, (103), 95 states have internal predecessors, (103), 9 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2021-10-15 19:59:23,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 126 transitions. [2021-10-15 19:59:23,695 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 126 transitions. Word has length 46 [2021-10-15 19:59:23,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:59:23,696 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 126 transitions. [2021-10-15 19:59:23,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-15 19:59:23,696 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 126 transitions. [2021-10-15 19:59:23,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-15 19:59:23,697 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:59:23,698 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:59:23,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-15 19:59:23,698 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting sll_lengthErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-15 19:59:23,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:59:23,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1493663661, now seen corresponding path program 4 times [2021-10-15 19:59:23,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:59:23,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700908205] [2021-10-15 19:59:23,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:59:23,699 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:59:23,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:59:23,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 19:59:23,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:59:23,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-15 19:59:23,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:59:23,836 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-15 19:59:23,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:59:23,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700908205] [2021-10-15 19:59:23,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700908205] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:59:23,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262956697] [2021-10-15 19:59:23,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:59:23,836 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:59:23,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:59:23,837 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:59:23,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-15 19:59:24,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:59:24,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:59:24,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:59:24,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:59:24,410 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-15 19:59:24,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262956697] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:59:24,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 19:59:24,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 12 [2021-10-15 19:59:24,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281939410] [2021-10-15 19:59:24,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-15 19:59:24,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:59:24,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-15 19:59:24,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-15 19:59:24,412 INFO L87 Difference]: Start difference. First operand 110 states and 126 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-15 19:59:24,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:59:24,760 INFO L93 Difference]: Finished difference Result 121 states and 135 transitions. [2021-10-15 19:59:24,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 19:59:24,761 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2021-10-15 19:59:24,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 19:59:24,763 INFO L225 Difference]: With dead ends: 121 [2021-10-15 19:59:24,763 INFO L226 Difference]: Without dead ends: 121 [2021-10-15 19:59:24,763 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 157.0ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-10-15 19:59:24,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-10-15 19:59:24,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 105. [2021-10-15 19:59:24,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 82 states have (on average 1.2195121951219512) internal successors, (100), 91 states have internal predecessors, (100), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-10-15 19:59:24,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 118 transitions. [2021-10-15 19:59:24,770 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 118 transitions. Word has length 45 [2021-10-15 19:59:24,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 19:59:24,770 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 118 transitions. [2021-10-15 19:59:24,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-15 19:59:24,771 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 118 transitions. [2021-10-15 19:59:24,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-15 19:59:24,772 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 19:59:24,772 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2021-10-15 19:59:24,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-15 19:59:24,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:59:24,992 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 7 more)] === [2021-10-15 19:59:24,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:59:24,992 INFO L82 PathProgramCache]: Analyzing trace with hash 212662197, now seen corresponding path program 3 times [2021-10-15 19:59:24,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:59:24,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640901675] [2021-10-15 19:59:24,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:59:24,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:59:25,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:59:25,020 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 19:59:25,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:59:25,086 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 19:59:25,086 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-15 19:59:25,087 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr0ASSERT_VIOLATIONMEMORY_LEAK [2021-10-15 19:59:25,089 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_destroyErr0REQUIRES_VIOLATION [2021-10-15 19:59:25,090 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_destroyErr1REQUIRES_VIOLATION [2021-10-15 19:59:25,090 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:59:25,090 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:59:25,090 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_destroyErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 19:59:25,091 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_lengthErr0REQUIRES_VIOLATION [2021-10-15 19:59:25,091 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_lengthErr1REQUIRES_VIOLATION [2021-10-15 19:59:25,091 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_createErr0REQUIRES_VIOLATION [2021-10-15 19:59:25,091 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location sll_createErr1REQUIRES_VIOLATION [2021-10-15 19:59:25,091 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1ENSURES_VIOLATIONMEMORY_LEAK [2021-10-15 19:59:25,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-15 19:59:25,099 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:59:25,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:59:25 BoogieIcfgContainer [2021-10-15 19:59:25,143 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:59:25,143 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:59:25,143 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:59:25,143 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:59:25,144 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:57:52" (3/4) ... [2021-10-15 19:59:25,146 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-15 19:59:25,228 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:59:25,228 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:59:25,230 INFO L168 Benchmark]: Toolchain (without parser) took 94208.40 ms. Allocated memory was 121.6 MB in the beginning and 159.4 MB in the end (delta: 37.7 MB). Free memory was 84.2 MB in the beginning and 70.3 MB in the end (delta: 13.9 MB). Peak memory consumption was 50.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:59:25,230 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 121.6 MB. Free memory was 102.6 MB in the beginning and 102.5 MB in the end (delta: 80.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:59:25,231 INFO L168 Benchmark]: CACSL2BoogieTranslator took 539.88 ms. Allocated memory is still 121.6 MB. Free memory was 84.1 MB in the beginning and 91.7 MB in the end (delta: -7.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:59:25,231 INFO L168 Benchmark]: Boogie Preprocessor took 89.57 ms. Allocated memory is still 121.6 MB. Free memory was 91.7 MB in the beginning and 88.8 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:59:25,232 INFO L168 Benchmark]: RCFGBuilder took 663.11 ms. Allocated memory is still 121.6 MB. Free memory was 88.8 MB in the beginning and 68.2 MB in the end (delta: 20.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-15 19:59:25,232 INFO L168 Benchmark]: TraceAbstraction took 92824.08 ms. Allocated memory was 121.6 MB in the beginning and 159.4 MB in the end (delta: 37.7 MB). Free memory was 67.9 MB in the beginning and 73.5 MB in the end (delta: -5.6 MB). Peak memory consumption was 34.0 MB. Max. memory is 16.1 GB. [2021-10-15 19:59:25,233 INFO L168 Benchmark]: Witness Printer took 85.36 ms. Allocated memory is still 159.4 MB. Free memory was 73.5 MB in the beginning and 70.3 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:59:25,235 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 121.6 MB. Free memory was 102.6 MB in the beginning and 102.5 MB in the end (delta: 80.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 539.88 ms. Allocated memory is still 121.6 MB. Free memory was 84.1 MB in the beginning and 91.7 MB in the end (delta: -7.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 89.57 ms. Allocated memory is still 121.6 MB. Free memory was 91.7 MB in the beginning and 88.8 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 663.11 ms. Allocated memory is still 121.6 MB. Free memory was 88.8 MB in the beginning and 68.2 MB in the end (delta: 20.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 92824.08 ms. Allocated memory was 121.6 MB in the beginning and 159.4 MB in the end (delta: 37.7 MB). Free memory was 67.9 MB in the beginning and 73.5 MB in the end (delta: -5.6 MB). Peak memory consumption was 34.0 MB. Max. memory is 16.1 GB. * Witness Printer took 85.36 ms. Allocated memory is still 159.4 MB. Free memory was 73.5 MB in the beginning and 70.3 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 613]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L603] int len = 2; VAL [len=2] [L604] len < 32 && __VERIFIER_nondet_int() [L604] len < 32 && __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, len=2, len < 32 && __VERIFIER_nondet_int()=0] [L604] COND FALSE !(len < 32 && __VERIFIER_nondet_int()) [L607] CALL, EXPR sll_create(len + 1) VAL [\old(len)=3] [L575] SLL head = ((void *)0); VAL [\old(len)=3, head={0:0}, len=3] [L576] COND TRUE len > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=3, head={0:0}, len=3, new_head={-1:0}] [L581] new_head->next = head VAL [\old(len)=3, head={0:0}, len=3, new_head={-1:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=3, head={-1:0}, len=2, new_head={-1:0}] [L576] COND TRUE len > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=3, head={-1:0}, len=2, new_head={-2:0}] [L581] new_head->next = head VAL [\old(len)=3, head={-1:0}, len=2, new_head={-2:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=3, head={-2:0}, len=1, new_head={-2:0}] [L576] COND TRUE len > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=3, head={-2:0}, len=1, new_head={-3:0}] [L581] new_head->next = head VAL [\old(len)=3, head={-2:0}, len=1, new_head={-3:0}] [L582] head = new_head [L583] len-- VAL [\old(len)=3, head={-3:0}, len=0, new_head={-3:0}] [L576] COND FALSE !(len > 0) VAL [\old(len)=3, head={-3:0}, len=0, new_head={-3:0}] [L585] return head; VAL [\old(len)=3, \result={-3:0}, head={-3:0}, len=0, new_head={-3:0}] [L607] RET, EXPR sll_create(len + 1) VAL [len=2, sll_create(len + 1)={-3:0}] [L607] SLL s = sll_create(len + 1); [L608] CALL, EXPR sll_length(s) VAL [head={-3:0}] [L588] int len = 0; VAL [head={-3:0}, head={-3:0}, len=0] [L589] COND TRUE \read(head) [L590] len++ VAL [head={-3:0}, head={-3:0}, len=1] [L591] EXPR head->next VAL [head={-3:0}, head={-3:0}, head->next={-2:0}, len=1] [L591] head = head->next [L589] COND TRUE \read(head) [L590] len++ VAL [head={-2:0}, head={-3:0}, len=2] [L591] EXPR head->next VAL [head={-2:0}, head={-3:0}, head->next={-1:0}, len=2] [L591] head = head->next [L589] COND TRUE \read(head) [L590] len++ VAL [head={-1:0}, head={-3:0}, len=3] [L591] EXPR head->next VAL [head={-3:0}, head={-1:0}, head->next={0:0}, len=3] [L591] head = head->next [L589] COND FALSE !(\read(head)) VAL [head={0:0}, head={-3:0}, len=3] [L593] return len; VAL [\result=3, head={-3:0}, head={0:0}, len=3] [L608] RET, EXPR sll_length(s) VAL [len=2, s={-3:0}, sll_length(s)=3] [L608] COND TRUE len != sll_length(s) [L613] reach_error() VAL [len=2, s={-3:0}] - UnprovableResult [Line: 597]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 597]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 598]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 598]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 598]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 591]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 591]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 69 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 92719.7ms, OverallIterations: 20, TraceHistogramMax: 4, EmptinessCheckTime: 43.8ms, AutomataDifference: 67305.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 761 SDtfs, 2112 SDslu, 2593 SDs, 0 SdLazy, 10951 SolverSat, 410 SolverUnsat, 16 SolverUnknown, 0 SolverNotchecked, 38558.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 781 GetRequests, 359 SyntacticMatches, 5 SemanticMatches, 417 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2147 ImplicationChecksByTransitivity, 38265.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=110occurred in iteration=18, InterpolantAutomatonStates: 243, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 195.9ms AutomataMinimizationTime, 19 MinimizatonAttempts, 351 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 177.7ms SsaConstructionTime, 662.2ms SatisfiabilityAnalysisTime, 19441.2ms InterpolantComputationTime, 1025 NumberOfCodeBlocks, 1022 NumberOfCodeBlocksAsserted, 37 NumberOfCheckSat, 950 ConstructedInterpolants, 35 QuantifiedInterpolants, 11130 SizeOfPredicates, 104 NumberOfNonLiveVariables, 2089 ConjunctsInSsa, 349 ConjunctsInUnsatCore, 29 InterpolantComputations, 9 PerfectInterpolantSequences, 265/459 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-15 19:59:25,463 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-10-15 19:59:25,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d109585f-1733-4493-9465-cbee8a307496/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...