./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/test-0158_1-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5058e44a-0b74-45a6-b923-0ebca46ea405/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5058e44a-0b74-45a6-b923-0ebca46ea405/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5058e44a-0b74-45a6-b923-0ebca46ea405/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5058e44a-0b74-45a6-b923-0ebca46ea405/bin/uautomizer-UnR33cPsHg/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/test-0158_1-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5058e44a-0b74-45a6-b923-0ebca46ea405/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5058e44a-0b74-45a6-b923-0ebca46ea405/bin/uautomizer-UnR33cPsHg --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash da0196598caa8f7971f5c05318e98ec0e7e9ad277348cd08159b1fad4465fe6c ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-free) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 09:59:39,478 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:59:39,482 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:59:39,521 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:59:39,522 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:59:39,527 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:59:39,529 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:59:39,533 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:59:39,536 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:59:39,543 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:59:39,544 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:59:39,546 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:59:39,547 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:59:39,550 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:59:39,552 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:59:39,559 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:59:39,561 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:59:39,562 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:59:39,567 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:59:39,572 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:59:39,576 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:59:39,578 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:59:39,581 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:59:39,582 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:59:39,589 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:59:39,589 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:59:39,590 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:59:39,592 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:59:39,593 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:59:39,594 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:59:39,595 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:59:39,596 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:59:39,598 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:59:39,599 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:59:39,601 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:59:39,601 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:59:39,602 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:59:39,602 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:59:39,602 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:59:39,603 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:59:39,604 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:59:39,605 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5058e44a-0b74-45a6-b923-0ebca46ea405/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 09:59:39,655 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:59:39,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:59:39,657 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:59:39,657 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:59:39,659 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:59:39,659 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:59:39,659 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:59:39,659 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:59:39,660 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 09:59:39,660 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 09:59:39,661 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:59:39,661 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 09:59:39,661 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:59:39,662 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 09:59:39,662 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 09:59:39,662 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 09:59:39,662 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 09:59:39,663 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 09:59:39,663 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 09:59:39,663 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:59:39,663 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:59:39,663 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:59:39,664 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 09:59:39,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:59:39,664 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:59:39,664 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 09:59:39,665 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 09:59:39,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 09:59:39,665 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:59:39,667 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_5058e44a-0b74-45a6-b923-0ebca46ea405/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5058e44a-0b74-45a6-b923-0ebca46ea405/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da0196598caa8f7971f5c05318e98ec0e7e9ad277348cd08159b1fad4465fe6c [2021-10-28 09:59:39,913 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:59:39,934 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:59:39,937 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:59:39,938 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:59:39,939 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:59:39,940 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5058e44a-0b74-45a6-b923-0ebca46ea405/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/list-ext-properties/test-0158_1-3.i [2021-10-28 09:59:40,006 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5058e44a-0b74-45a6-b923-0ebca46ea405/bin/uautomizer-UnR33cPsHg/data/3888da3ac/2a4e8c79948a403cb527b34a6ea7e41c/FLAGc0e04d40b [2021-10-28 09:59:40,555 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:59:40,559 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5058e44a-0b74-45a6-b923-0ebca46ea405/sv-benchmarks/c/list-ext-properties/test-0158_1-3.i [2021-10-28 09:59:40,572 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5058e44a-0b74-45a6-b923-0ebca46ea405/bin/uautomizer-UnR33cPsHg/data/3888da3ac/2a4e8c79948a403cb527b34a6ea7e41c/FLAGc0e04d40b [2021-10-28 09:59:41,031 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5058e44a-0b74-45a6-b923-0ebca46ea405/bin/uautomizer-UnR33cPsHg/data/3888da3ac/2a4e8c79948a403cb527b34a6ea7e41c [2021-10-28 09:59:41,036 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:59:41,038 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 09:59:41,039 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:59:41,040 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:59:41,059 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:59:41,060 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:59:41" (1/1) ... [2021-10-28 09:59:41,062 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47df7916 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:59:41, skipping insertion in model container [2021-10-28 09:59:41,062 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:59:41" (1/1) ... [2021-10-28 09:59:41,069 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:59:41,134 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:59:41,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:59:41,425 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:59:41,504 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:59:41,542 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:59:41,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:59:41 WrapperNode [2021-10-28 09:59:41,544 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:59:41,545 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:59:41,545 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:59:41,545 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:59:41,557 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:59:41" (1/1) ... [2021-10-28 09:59:41,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:59:41" (1/1) ... [2021-10-28 09:59:41,576 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:59:41" (1/1) ... [2021-10-28 09:59:41,576 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:59:41" (1/1) ... [2021-10-28 09:59:41,605 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:59:41" (1/1) ... [2021-10-28 09:59:41,606 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:59:41" (1/1) ... [2021-10-28 09:59:41,610 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:59:41" (1/1) ... [2021-10-28 09:59:41,627 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:59:41,628 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:59:41,628 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:59:41,628 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:59:41,633 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:59:41" (1/1) ... [2021-10-28 09:59:41,642 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:59:41,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5058e44a-0b74-45a6-b923-0ebca46ea405/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:59:41,681 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5058e44a-0b74-45a6-b923-0ebca46ea405/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 09:59:41,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5058e44a-0b74-45a6-b923-0ebca46ea405/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 09:59:41,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 09:59:41,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:59:41,726 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 09:59:41,726 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 09:59:41,726 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 09:59:41,726 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-28 09:59:41,726 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-28 09:59:41,727 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-28 09:59:41,728 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 09:59:41,728 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 09:59:41,728 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 09:59:41,729 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-28 09:59:41,729 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-28 09:59:41,729 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 09:59:41,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 09:59:41,729 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 09:59:41,729 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 09:59:41,730 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 09:59:41,730 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 09:59:41,730 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 09:59:41,730 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 09:59:41,730 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 09:59:41,730 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 09:59:41,730 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 09:59:41,730 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 09:59:41,731 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 09:59:41,731 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 09:59:41,731 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 09:59:41,731 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 09:59:41,731 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 09:59:41,731 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 09:59:41,731 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 09:59:41,732 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 09:59:41,732 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-28 09:59:41,732 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-28 09:59:41,732 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-28 09:59:41,732 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 09:59:41,733 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 09:59:41,733 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 09:59:41,733 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 09:59:41,733 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 09:59:41,733 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 09:59:41,733 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 09:59:41,733 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 09:59:41,734 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 09:59:41,734 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 09:59:41,734 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 09:59:41,734 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 09:59:41,734 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 09:59:41,735 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 09:59:41,735 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 09:59:41,736 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 09:59:41,736 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 09:59:41,736 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 09:59:41,736 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 09:59:41,736 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 09:59:41,736 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 09:59:41,736 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 09:59:41,737 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 09:59:41,737 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 09:59:41,737 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 09:59:41,737 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 09:59:41,737 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 09:59:41,738 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 09:59:41,738 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 09:59:41,738 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 09:59:41,738 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 09:59:41,739 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 09:59:41,740 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 09:59:41,740 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 09:59:41,741 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 09:59:41,741 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 09:59:41,741 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 09:59:41,741 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 09:59:41,741 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 09:59:41,741 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 09:59:41,741 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 09:59:41,741 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 09:59:41,742 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 09:59:41,742 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 09:59:41,742 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 09:59:41,742 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 09:59:41,742 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 09:59:41,742 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 09:59:41,742 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 09:59:41,742 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 09:59:41,743 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 09:59:41,743 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 09:59:41,744 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 09:59:41,744 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 09:59:41,744 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 09:59:41,744 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 09:59:41,744 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 09:59:41,744 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 09:59:41,744 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 09:59:41,745 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 09:59:41,745 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 09:59:41,745 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 09:59:41,745 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 09:59:41,745 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 09:59:41,745 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 09:59:41,745 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 09:59:41,745 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 09:59:41,746 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 09:59:41,746 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 09:59:41,746 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 09:59:41,746 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 09:59:41,746 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 09:59:41,747 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 09:59:41,747 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 09:59:41,747 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 09:59:41,747 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 09:59:41,748 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 09:59:41,748 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 09:59:41,748 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 09:59:41,749 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 09:59:41,749 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 09:59:41,749 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 09:59:41,749 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 09:59:41,749 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 09:59:41,749 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 09:59:41,749 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 09:59:41,749 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 09:59:41,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 09:59:41,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 09:59:41,750 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 09:59:41,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 09:59:41,750 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 09:59:41,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 09:59:41,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 09:59:41,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 09:59:41,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:59:42,286 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:59:42,286 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-10-28 09:59:42,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:59:42 BoogieIcfgContainer [2021-10-28 09:59:42,288 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:59:42,290 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 09:59:42,290 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 09:59:42,303 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 09:59:42,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:59:41" (1/3) ... [2021-10-28 09:59:42,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b092a2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:59:42, skipping insertion in model container [2021-10-28 09:59:42,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:59:41" (2/3) ... [2021-10-28 09:59:42,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b092a2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:59:42, skipping insertion in model container [2021-10-28 09:59:42,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:59:42" (3/3) ... [2021-10-28 09:59:42,306 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0158_1-3.i [2021-10-28 09:59:42,319 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 09:59:42,320 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2021-10-28 09:59:42,417 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 09:59:42,425 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, mAutomataTypeConcurrency=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 [2021-10-28 09:59:42,425 INFO L340 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2021-10-28 09:59:42,446 INFO L276 IsEmpty]: Start isEmpty. Operand has 48 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 43 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 09:59:42,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-28 09:59:42,455 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:59:42,456 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:59:42,457 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 16 more)] === [2021-10-28 09:59:42,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:59:42,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1605920523, now seen corresponding path program 1 times [2021-10-28 09:59:42,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:59:42,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461372507] [2021-10-28 09:59:42,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:42,478 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:59:42,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:42,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:59:42,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:42,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:59:42,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:59:42,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461372507] [2021-10-28 09:59:42,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461372507] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:59:42,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:59:42,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:59:42,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587635242] [2021-10-28 09:59:42,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:59:42,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:59:42,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:59:42,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:59:42,835 INFO L87 Difference]: Start difference. First operand has 48 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 43 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:59:42,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:59:42,951 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2021-10-28 09:59:42,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:59:42,953 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-10-28 09:59:42,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:59:42,961 INFO L225 Difference]: With dead ends: 41 [2021-10-28 09:59:42,961 INFO L226 Difference]: Without dead ends: 38 [2021-10-28 09:59:42,962 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:59:42,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-28 09:59:42,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-10-28 09:59:42,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 34 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:59:42,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-10-28 09:59:42,997 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 7 [2021-10-28 09:59:42,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:59:42,997 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-10-28 09:59:42,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:59:42,998 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-10-28 09:59:42,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-28 09:59:42,998 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:59:42,998 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:59:42,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 09:59:42,999 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 16 more)] === [2021-10-28 09:59:43,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:59:43,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1605920524, now seen corresponding path program 1 times [2021-10-28 09:59:43,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:59:43,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564287021] [2021-10-28 09:59:43,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:43,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:59:43,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:43,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:59:43,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:43,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:59:43,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:59:43,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564287021] [2021-10-28 09:59:43,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564287021] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:59:43,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:59:43,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:59:43,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61944393] [2021-10-28 09:59:43,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:59:43,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:59:43,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:59:43,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:59:43,115 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:59:43,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:59:43,187 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-10-28 09:59:43,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:59:43,188 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-10-28 09:59:43,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:59:43,189 INFO L225 Difference]: With dead ends: 31 [2021-10-28 09:59:43,189 INFO L226 Difference]: Without dead ends: 31 [2021-10-28 09:59:43,190 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:59:43,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-28 09:59:43,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-10-28 09:59:43,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.380952380952381) internal successors, (29), 27 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:59:43,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-10-28 09:59:43,195 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 7 [2021-10-28 09:59:43,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:59:43,195 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-10-28 09:59:43,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:59:43,196 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-10-28 09:59:43,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 09:59:43,197 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:59:43,197 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:59:43,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 09:59:43,198 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr14ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 16 more)] === [2021-10-28 09:59:43,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:59:43,198 INFO L85 PathProgramCache]: Analyzing trace with hash -202342310, now seen corresponding path program 1 times [2021-10-28 09:59:43,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:59:43,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393755144] [2021-10-28 09:59:43,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:43,200 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:59:43,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:43,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:59:43,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:43,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:59:43,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:59:43,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393755144] [2021-10-28 09:59:43,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393755144] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:59:43,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:59:43,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:59:43,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971985018] [2021-10-28 09:59:43,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:59:43,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:59:43,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:59:43,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:59:43,302 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:59:43,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:59:43,400 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2021-10-28 09:59:43,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:59:43,401 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-10-28 09:59:43,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:59:43,402 INFO L225 Difference]: With dead ends: 47 [2021-10-28 09:59:43,402 INFO L226 Difference]: Without dead ends: 47 [2021-10-28 09:59:43,403 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:59:43,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-28 09:59:43,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 33. [2021-10-28 09:59:43,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 29 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:59:43,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-10-28 09:59:43,409 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 16 [2021-10-28 09:59:43,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:59:43,409 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-10-28 09:59:43,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:59:43,410 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-10-28 09:59:43,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 09:59:43,410 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:59:43,411 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:59:43,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 09:59:43,411 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr14ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 16 more)] === [2021-10-28 09:59:43,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:59:43,412 INFO L85 PathProgramCache]: Analyzing trace with hash -54578950, now seen corresponding path program 1 times [2021-10-28 09:59:43,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:59:43,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465299571] [2021-10-28 09:59:43,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:43,413 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:59:43,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:43,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:59:43,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:43,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:59:43,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:59:43,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465299571] [2021-10-28 09:59:43,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465299571] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:59:43,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:59:43,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:59:43,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415555983] [2021-10-28 09:59:43,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:59:43,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:59:43,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:59:43,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:59:43,520 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:59:43,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:59:43,598 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2021-10-28 09:59:43,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:59:43,599 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-10-28 09:59:43,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:59:43,600 INFO L225 Difference]: With dead ends: 32 [2021-10-28 09:59:43,600 INFO L226 Difference]: Without dead ends: 32 [2021-10-28 09:59:43,601 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:59:43,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-28 09:59:43,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-10-28 09:59:43,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 28 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:59:43,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-10-28 09:59:43,606 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 16 [2021-10-28 09:59:43,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:59:43,606 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-10-28 09:59:43,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:59:43,607 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-10-28 09:59:43,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 09:59:43,608 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:59:43,608 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:59:43,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 09:59:43,608 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr15ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 16 more)] === [2021-10-28 09:59:43,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:59:43,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1691947366, now seen corresponding path program 1 times [2021-10-28 09:59:43,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:59:43,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600763185] [2021-10-28 09:59:43,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:43,610 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:59:43,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:43,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:59:43,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:43,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:59:43,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:59:43,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600763185] [2021-10-28 09:59:43,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600763185] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:59:43,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:59:43,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:59:43,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82258105] [2021-10-28 09:59:43,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:59:43,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:59:43,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:59:43,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:59:43,714 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:59:43,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:59:43,799 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-10-28 09:59:43,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:59:43,800 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-10-28 09:59:43,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:59:43,800 INFO L225 Difference]: With dead ends: 31 [2021-10-28 09:59:43,801 INFO L226 Difference]: Without dead ends: 31 [2021-10-28 09:59:43,801 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:59:43,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-28 09:59:43,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-10-28 09:59:43,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 27 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:59:43,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-10-28 09:59:43,805 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 17 [2021-10-28 09:59:43,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:59:43,806 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-10-28 09:59:43,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:59:43,806 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-10-28 09:59:43,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 09:59:43,807 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:59:43,807 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:59:43,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 09:59:43,808 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr16ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 16 more)] === [2021-10-28 09:59:43,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:59:43,808 INFO L85 PathProgramCache]: Analyzing trace with hash -910760708, now seen corresponding path program 1 times [2021-10-28 09:59:43,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:59:43,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65679118] [2021-10-28 09:59:43,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:43,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:59:43,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:43,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:59:43,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:43,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:59:43,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:59:43,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65679118] [2021-10-28 09:59:43,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65679118] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:59:43,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:59:43,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:59:43,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047841621] [2021-10-28 09:59:43,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:59:43,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:59:43,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:59:43,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:59:43,894 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:59:43,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:59:43,972 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2021-10-28 09:59:43,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:59:43,973 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-10-28 09:59:43,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:59:43,974 INFO L225 Difference]: With dead ends: 30 [2021-10-28 09:59:43,974 INFO L226 Difference]: Without dead ends: 30 [2021-10-28 09:59:43,974 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:59:43,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-28 09:59:43,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-10-28 09:59:43,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:59:43,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-10-28 09:59:43,978 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 18 [2021-10-28 09:59:43,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:59:43,979 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-10-28 09:59:43,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:59:43,979 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-10-28 09:59:43,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 09:59:43,980 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:59:43,980 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:59:43,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 09:59:43,981 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr17ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 16 more)] === [2021-10-28 09:59:43,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:59:43,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1831189212, now seen corresponding path program 1 times [2021-10-28 09:59:43,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:59:43,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475260096] [2021-10-28 09:59:43,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:43,982 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:59:43,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:44,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:59:44,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:44,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:59:44,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:59:44,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475260096] [2021-10-28 09:59:44,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475260096] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:59:44,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:59:44,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 09:59:44,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062526803] [2021-10-28 09:59:44,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:59:44,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:59:44,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:59:44,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:59:44,074 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:59:44,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:59:44,156 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2021-10-28 09:59:44,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:59:44,157 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-10-28 09:59:44,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:59:44,158 INFO L225 Difference]: With dead ends: 29 [2021-10-28 09:59:44,158 INFO L226 Difference]: Without dead ends: 29 [2021-10-28 09:59:44,158 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:59:44,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-28 09:59:44,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-28 09:59:44,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.173913043478261) internal successors, (27), 25 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:59:44,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-10-28 09:59:44,162 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 19 [2021-10-28 09:59:44,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:59:44,162 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-10-28 09:59:44,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:59:44,163 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-10-28 09:59:44,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 09:59:44,164 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:59:44,164 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:59:44,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 09:59:44,164 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr18ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 16 more)] === [2021-10-28 09:59:44,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:59:44,165 INFO L85 PathProgramCache]: Analyzing trace with hash 932290814, now seen corresponding path program 1 times [2021-10-28 09:59:44,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:59:44,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703713019] [2021-10-28 09:59:44,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:44,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:59:44,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:44,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:59:44,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:59:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:59:44,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:59:44,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703713019] [2021-10-28 09:59:44,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703713019] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:59:44,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:59:44,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 09:59:44,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717744655] [2021-10-28 09:59:44,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:59:44,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:59:44,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:59:44,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:59:44,247 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:59:44,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:59:44,344 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-10-28 09:59:44,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:59:44,345 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-10-28 09:59:44,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:59:44,348 INFO L225 Difference]: With dead ends: 28 [2021-10-28 09:59:44,348 INFO L226 Difference]: Without dead ends: 28 [2021-10-28 09:59:44,349 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:59:44,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-28 09:59:44,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-28 09:59:44,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:59:44,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-10-28 09:59:44,363 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 20 [2021-10-28 09:59:44,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:59:44,363 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-10-28 09:59:44,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:59:44,364 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-10-28 09:59:44,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 09:59:44,365 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:59:44,365 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:59:44,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-28 09:59:44,365 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr19ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 16 more)] === [2021-10-28 09:59:44,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:59:44,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1163755746, now seen corresponding path program 1 times [2021-10-28 09:59:44,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:59:44,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375271335] [2021-10-28 09:59:44,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:59:44,367 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:59:44,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:59:44,409 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:59:44,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:59:44,461 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:59:44,461 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 09:59:44,462 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr19ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 09:59:44,464 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-28 09:59:44,465 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-28 09:59:44,465 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-28 09:59:44,465 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-28 09:59:44,465 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-28 09:59:44,465 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-28 09:59:44,466 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-10-28 09:59:44,466 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-28 09:59:44,466 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-28 09:59:44,466 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-10-28 09:59:44,467 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-10-28 09:59:44,467 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-10-28 09:59:44,467 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-10-28 09:59:44,467 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-10-28 09:59:44,468 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 09:59:44,468 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 09:59:44,468 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 09:59:44,468 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 09:59:44,469 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 09:59:44,469 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 09:59:44,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-28 09:59:44,477 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:59:44,481 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 09:59:44,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:59:44 BoogieIcfgContainer [2021-10-28 09:59:44,516 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 09:59:44,517 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:59:44,517 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:59:44,517 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:59:44,517 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:59:42" (3/4) ... [2021-10-28 09:59:44,519 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-28 09:59:44,572 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5058e44a-0b74-45a6-b923-0ebca46ea405/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 09:59:44,572 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:59:44,575 INFO L168 Benchmark]: Toolchain (without parser) took 3534.92 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 69.1 MB in the beginning and 48.3 MB in the end (delta: 20.8 MB). Peak memory consumption was 38.4 MB. Max. memory is 16.1 GB. [2021-10-28 09:59:44,576 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 90.2 MB. Free memory is still 66.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:59:44,576 INFO L168 Benchmark]: CACSL2BoogieTranslator took 504.86 ms. Allocated memory is still 90.2 MB. Free memory was 68.9 MB in the beginning and 57.6 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 09:59:44,577 INFO L168 Benchmark]: Boogie Preprocessor took 82.29 ms. Allocated memory is still 90.2 MB. Free memory was 57.6 MB in the beginning and 55.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:59:44,577 INFO L168 Benchmark]: RCFGBuilder took 660.49 ms. Allocated memory is still 90.2 MB. Free memory was 55.1 MB in the beginning and 35.2 MB in the end (delta: 19.9 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-28 09:59:44,577 INFO L168 Benchmark]: TraceAbstraction took 2225.72 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 34.8 MB in the beginning and 50.4 MB in the end (delta: -15.7 MB). Peak memory consumption was 4.7 MB. Max. memory is 16.1 GB. [2021-10-28 09:59:44,578 INFO L168 Benchmark]: Witness Printer took 55.39 ms. Allocated memory is still 109.1 MB. Free memory was 50.1 MB in the beginning and 48.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:59:44,580 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 90.2 MB. Free memory is still 66.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 504.86 ms. Allocated memory is still 90.2 MB. Free memory was 68.9 MB in the beginning and 57.6 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 82.29 ms. Allocated memory is still 90.2 MB. Free memory was 57.6 MB in the beginning and 55.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 660.49 ms. Allocated memory is still 90.2 MB. Free memory was 55.1 MB in the beginning and 35.2 MB in the end (delta: 19.9 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2225.72 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 34.8 MB in the beginning and 50.4 MB in the end (delta: -15.7 MB). Peak memory consumption was 4.7 MB. Max. memory is 16.1 GB. * Witness Printer took 55.39 ms. Allocated memory is still 109.1 MB. Free memory was 50.1 MB in the beginning and 48.3 MB in the end (delta: 1.7 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, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 545]: free of unallocated memory possible free of unallocated memory possible We found a FailurePath: [L526-L533] union { void *p0; struct { char c[2]; int p1; int p2; } str; } data; [L534] data.p0 = malloc(37U) VAL [data={3:0}, malloc(37U)={-1:0}] [L535] EXPR data.p0 VAL [data={3:0}, data.p0={-1:0}] [L535] void *ptr = data.p0; [L536] COND FALSE !(__VERIFIER_nondet_int()) [L539] data.str.p2 = 30 VAL [data={3:0}, ptr={-1:0}] [L541] EXPR data.str.p2 VAL [data={3:0}, data.str.p2=30, ptr={-1:0}] [L541] COND FALSE !(25 > data.str.p2) [L544] EXPR data.p0 VAL [data={3:0}, data.p0={-1:0}, ptr={-1:0}] [L544] free(data.p0) VAL [data={3:0}, data.p0={-1:0}, ptr={-1:0}] [L544] free(data.p0) VAL [data={3:0}, data.p0={-1:0}, ptr={-1:0}] [L544] free(data.p0) [L545] free(ptr) VAL [data={3:0}, ptr={-1:0}] [L545] free(ptr) VAL [data={3:0}, ptr={-1:0}] [L545] free(ptr) VAL [data={3:0}, ptr={-1:0}] - UnprovableResult [Line: 534]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 524]: 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 9 procedures, 66 locations, 21 error locations. Started 1 CEGAR loops. OverallTime: 2.0s, OverallIterations: 9, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 166 SDtfs, 141 SDslu, 277 SDs, 0 SdLazy, 499 SolverSat, 43 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=0, InterpolantAutomatonStates: 52, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 14 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 141 NumberOfCodeBlocks, 141 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 112 ConstructedInterpolants, 0 QuantifiedInterpolants, 632 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-28 09:59:44,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5058e44a-0b74-45a6-b923-0ebca46ea405/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...