./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-15/count_up_and_down_alloca.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-15/count_up_and_down_alloca.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8 --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 64bit --witnessprinter.graph.data.programhash 00bfc508b8ea24f88f85b042e795fbae14e8287990a04ebdf542583ad129e19a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 17:56:27,525 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 17:56:27,527 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 17:56:27,544 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 17:56:27,545 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 17:56:27,546 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 17:56:27,547 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 17:56:27,548 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 17:56:27,550 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 17:56:27,550 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 17:56:27,551 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 17:56:27,552 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 17:56:27,552 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 17:56:27,553 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 17:56:27,554 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 17:56:27,555 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 17:56:27,556 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 17:56:27,557 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 17:56:27,558 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 17:56:27,560 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 17:56:27,561 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 17:56:27,562 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 17:56:27,563 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 17:56:27,564 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 17:56:27,567 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 17:56:27,567 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 17:56:27,567 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 17:56:27,568 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 17:56:27,569 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 17:56:27,570 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 17:56:27,570 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 17:56:27,571 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 17:56:27,571 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 17:56:27,572 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 17:56:27,573 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 17:56:27,573 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 17:56:27,574 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 17:56:27,574 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 17:56:27,574 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 17:56:27,575 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 17:56:27,575 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 17:56:27,576 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2022-12-13 17:56:27,595 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 17:56:27,595 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 17:56:27,595 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 17:56:27,596 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 17:56:27,596 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 17:56:27,596 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 17:56:27,597 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 17:56:27,597 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 17:56:27,597 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 17:56:27,597 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 17:56:27,598 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 17:56:27,598 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 17:56:27,598 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 17:56:27,598 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 17:56:27,598 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 17:56:27,598 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 17:56:27,599 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 17:56:27,599 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 17:56:27,599 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 17:56:27,599 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 17:56:27,599 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 17:56:27,599 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 17:56:27,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:56:27,600 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 17:56:27,600 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 17:56:27,600 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 17:56:27,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 17:56:27,600 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 17:56:27,601 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 17:56:27,601 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 17:56:27,601 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 17:56:27,601 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00bfc508b8ea24f88f85b042e795fbae14e8287990a04ebdf542583ad129e19a [2022-12-13 17:56:27,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 17:56:27,823 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 17:56:27,825 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 17:56:27,826 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 17:56:27,827 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 17:56:27,828 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/termination-15/count_up_and_down_alloca.i [2022-12-13 17:56:30,466 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 17:56:30,665 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 17:56:30,665 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/sv-benchmarks/c/termination-15/count_up_and_down_alloca.i [2022-12-13 17:56:30,673 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/data/136b55a7d/87c4a6f1b5ed4ea4b12c5340324292fb/FLAG59d79ee8c [2022-12-13 17:56:30,685 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/data/136b55a7d/87c4a6f1b5ed4ea4b12c5340324292fb [2022-12-13 17:56:30,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 17:56:30,688 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 17:56:30,689 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 17:56:30,689 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 17:56:30,692 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 17:56:30,693 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:56:30" (1/1) ... [2022-12-13 17:56:30,694 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77631ea6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:56:30, skipping insertion in model container [2022-12-13 17:56:30,694 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:56:30" (1/1) ... [2022-12-13 17:56:30,699 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 17:56:30,722 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 17:56:30,948 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:56:30,957 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 17:56:30,991 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:56:31,014 INFO L208 MainTranslator]: Completed translation [2022-12-13 17:56:31,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:56:31 WrapperNode [2022-12-13 17:56:31,014 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 17:56:31,015 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 17:56:31,015 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 17:56:31,015 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 17:56:31,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:56:31" (1/1) ... [2022-12-13 17:56:31,032 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:56:31" (1/1) ... [2022-12-13 17:56:31,048 INFO L138 Inliner]: procedures = 151, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 57 [2022-12-13 17:56:31,048 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 17:56:31,048 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 17:56:31,048 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 17:56:31,049 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 17:56:31,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:56:31" (1/1) ... [2022-12-13 17:56:31,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:56:31" (1/1) ... [2022-12-13 17:56:31,057 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:56:31" (1/1) ... [2022-12-13 17:56:31,057 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:56:31" (1/1) ... [2022-12-13 17:56:31,062 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:56:31" (1/1) ... [2022-12-13 17:56:31,065 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:56:31" (1/1) ... [2022-12-13 17:56:31,067 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:56:31" (1/1) ... [2022-12-13 17:56:31,067 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:56:31" (1/1) ... [2022-12-13 17:56:31,069 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 17:56:31,070 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 17:56:31,070 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 17:56:31,070 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 17:56:31,071 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:56:31" (1/1) ... [2022-12-13 17:56:31,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:56:31,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:56:31,097 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 17:56:31,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 17:56:31,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 17:56:31,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 17:56:31,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 17:56:31,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 17:56:31,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 17:56:31,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 17:56:31,193 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 17:56:31,194 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 17:56:31,328 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 17:56:31,332 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 17:56:31,332 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 17:56:31,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:56:31 BoogieIcfgContainer [2022-12-13 17:56:31,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 17:56:31,335 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 17:56:31,336 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 17:56:31,338 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 17:56:31,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 05:56:30" (1/3) ... [2022-12-13 17:56:31,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5530d378 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:56:31, skipping insertion in model container [2022-12-13 17:56:31,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:56:31" (2/3) ... [2022-12-13 17:56:31,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5530d378 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:56:31, skipping insertion in model container [2022-12-13 17:56:31,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:56:31" (3/3) ... [2022-12-13 17:56:31,340 INFO L112 eAbstractionObserver]: Analyzing ICFG count_up_and_down_alloca.i [2022-12-13 17:56:31,354 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 17:56:31,354 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2022-12-13 17:56:31,387 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:56:31,391 INFO L357 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=PETRI_NET, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@27dc1794, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:56:31,392 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2022-12-13 17:56:31,395 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 24 states have (on average 1.875) internal successors, (45), 37 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:31,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 17:56:31,399 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:56:31,400 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 17:56:31,400 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:56:31,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:56:31,404 INFO L85 PathProgramCache]: Analyzing trace with hash 889508776, now seen corresponding path program 1 times [2022-12-13 17:56:31,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:56:31,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574080992] [2022-12-13 17:56:31,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:56:31,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:56:31,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:56:31,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:56:31,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:56:31,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574080992] [2022-12-13 17:56:31,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574080992] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:56:31,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:56:31,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:56:31,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572645792] [2022-12-13 17:56:31,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:56:31,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:56:31,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:56:31,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:56:31,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:56:31,594 INFO L87 Difference]: Start difference. First operand has 38 states, 24 states have (on average 1.875) internal successors, (45), 37 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:31,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:56:31,639 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2022-12-13 17:56:31,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:56:31,642 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-13 17:56:31,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:56:31,647 INFO L225 Difference]: With dead ends: 38 [2022-12-13 17:56:31,647 INFO L226 Difference]: Without dead ends: 36 [2022-12-13 17:56:31,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:56:31,651 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 36 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:56:31,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 25 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:56:31,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-12-13 17:56:31,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-12-13 17:56:31,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 35 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:31,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-12-13 17:56:31,684 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 6 [2022-12-13 17:56:31,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:56:31,684 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-12-13 17:56:31,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:31,684 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-12-13 17:56:31,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 17:56:31,685 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:56:31,685 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 17:56:31,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 17:56:31,685 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:56:31,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:56:31,686 INFO L85 PathProgramCache]: Analyzing trace with hash 889508777, now seen corresponding path program 1 times [2022-12-13 17:56:31,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:56:31,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548202381] [2022-12-13 17:56:31,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:56:31,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:56:31,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:56:31,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:56:31,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:56:31,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548202381] [2022-12-13 17:56:31,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548202381] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:56:31,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:56:31,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:56:31,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76770853] [2022-12-13 17:56:31,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:56:31,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:56:31,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:56:31,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:56:31,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:56:31,742 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:31,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:56:31,774 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-12-13 17:56:31,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:56:31,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-13 17:56:31,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:56:31,776 INFO L225 Difference]: With dead ends: 30 [2022-12-13 17:56:31,776 INFO L226 Difference]: Without dead ends: 30 [2022-12-13 17:56:31,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:56:31,778 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 25 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:56:31,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 21 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:56:31,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-12-13 17:56:31,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-12-13 17:56:31,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.434782608695652) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:31,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-12-13 17:56:31,784 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 6 [2022-12-13 17:56:31,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:56:31,784 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-12-13 17:56:31,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:31,784 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-12-13 17:56:31,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 17:56:31,785 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:56:31,785 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 17:56:31,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 17:56:31,786 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:56:31,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:56:31,786 INFO L85 PathProgramCache]: Analyzing trace with hash 889508778, now seen corresponding path program 1 times [2022-12-13 17:56:31,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:56:31,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999151310] [2022-12-13 17:56:31,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:56:31,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:56:31,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:56:31,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:56:31,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:56:31,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999151310] [2022-12-13 17:56:31,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999151310] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:56:31,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:56:31,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:56:31,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775031828] [2022-12-13 17:56:31,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:56:31,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:56:31,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:56:31,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:56:31,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:56:31,931 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:32,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:56:32,001 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2022-12-13 17:56:32,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:56:32,002 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-13 17:56:32,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:56:32,003 INFO L225 Difference]: With dead ends: 56 [2022-12-13 17:56:32,003 INFO L226 Difference]: Without dead ends: 56 [2022-12-13 17:56:32,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:56:32,005 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 54 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:56:32,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 59 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:56:32,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-12-13 17:56:32,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 33. [2022-12-13 17:56:32,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:32,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-12-13 17:56:32,009 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 6 [2022-12-13 17:56:32,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:56:32,009 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-12-13 17:56:32,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:32,010 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-12-13 17:56:32,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 17:56:32,010 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:56:32,010 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 17:56:32,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 17:56:32,010 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:56:32,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:56:32,011 INFO L85 PathProgramCache]: Analyzing trace with hash 889568360, now seen corresponding path program 1 times [2022-12-13 17:56:32,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:56:32,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425354039] [2022-12-13 17:56:32,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:56:32,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:56:32,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:56:32,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:56:32,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:56:32,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425354039] [2022-12-13 17:56:32,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425354039] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:56:32,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:56:32,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:56:32,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528507150] [2022-12-13 17:56:32,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:56:32,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:56:32,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:56:32,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:56:32,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:56:32,110 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:32,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:56:32,156 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-12-13 17:56:32,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:56:32,156 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-13 17:56:32,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:56:32,157 INFO L225 Difference]: With dead ends: 32 [2022-12-13 17:56:32,157 INFO L226 Difference]: Without dead ends: 32 [2022-12-13 17:56:32,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 17:56:32,158 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 82 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:56:32,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 15 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:56:32,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-12-13 17:56:32,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2022-12-13 17:56:32,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.391304347826087) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:32,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-12-13 17:56:32,161 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 6 [2022-12-13 17:56:32,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:56:32,161 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-12-13 17:56:32,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:32,161 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-12-13 17:56:32,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-13 17:56:32,161 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:56:32,161 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:56:32,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 17:56:32,162 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:56:32,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:56:32,162 INFO L85 PathProgramCache]: Analyzing trace with hash -592252371, now seen corresponding path program 1 times [2022-12-13 17:56:32,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:56:32,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791752313] [2022-12-13 17:56:32,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:56:32,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:56:32,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:56:32,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:56:32,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:56:32,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791752313] [2022-12-13 17:56:32,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791752313] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:56:32,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:56:32,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:56:32,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195497042] [2022-12-13 17:56:32,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:56:32,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:56:32,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:56:32,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:56:32,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:56:32,198 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:32,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:56:32,213 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2022-12-13 17:56:32,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:56:32,214 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-13 17:56:32,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:56:32,215 INFO L225 Difference]: With dead ends: 49 [2022-12-13 17:56:32,215 INFO L226 Difference]: Without dead ends: 49 [2022-12-13 17:56:32,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:56:32,216 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 34 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:56:32,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 54 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:56:32,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-12-13 17:56:32,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2022-12-13 17:56:32,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 33 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:32,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-12-13 17:56:32,221 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 9 [2022-12-13 17:56:32,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:56:32,221 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-12-13 17:56:32,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:32,222 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-12-13 17:56:32,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-13 17:56:32,222 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:56:32,222 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:56:32,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 17:56:32,223 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:56:32,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:56:32,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1182754991, now seen corresponding path program 1 times [2022-12-13 17:56:32,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:56:32,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885878891] [2022-12-13 17:56:32,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:56:32,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:56:32,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:56:32,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:56:32,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:56:32,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885878891] [2022-12-13 17:56:32,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885878891] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:56:32,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:56:32,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:56:32,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948593785] [2022-12-13 17:56:32,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:56:32,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:56:32,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:56:32,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:56:32,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:56:32,282 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:32,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:56:32,327 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2022-12-13 17:56:32,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:56:32,327 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-13 17:56:32,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:56:32,328 INFO L225 Difference]: With dead ends: 55 [2022-12-13 17:56:32,328 INFO L226 Difference]: Without dead ends: 55 [2022-12-13 17:56:32,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:56:32,329 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 71 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:56:32,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 34 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:56:32,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-12-13 17:56:32,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 36. [2022-12-13 17:56:32,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:32,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-12-13 17:56:32,331 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 9 [2022-12-13 17:56:32,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:56:32,331 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-12-13 17:56:32,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:32,332 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-12-13 17:56:32,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-13 17:56:32,332 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:56:32,332 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:56:32,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 17:56:32,332 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:56:32,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:56:32,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1989300973, now seen corresponding path program 1 times [2022-12-13 17:56:32,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:56:32,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80128090] [2022-12-13 17:56:32,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:56:32,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:56:32,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:56:32,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:56:32,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:56:32,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80128090] [2022-12-13 17:56:32,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80128090] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:56:32,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:56:32,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 17:56:32,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018335127] [2022-12-13 17:56:32,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:56:32,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 17:56:32,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:56:32,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 17:56:32,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 17:56:32,483 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:32,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:56:32,569 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2022-12-13 17:56:32,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:56:32,569 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-13 17:56:32,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:56:32,570 INFO L225 Difference]: With dead ends: 54 [2022-12-13 17:56:32,570 INFO L226 Difference]: Without dead ends: 54 [2022-12-13 17:56:32,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-13 17:56:32,570 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 115 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:56:32,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 32 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:56:32,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-12-13 17:56:32,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2022-12-13 17:56:32,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:32,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-12-13 17:56:32,573 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 10 [2022-12-13 17:56:32,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:56:32,573 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-12-13 17:56:32,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:32,573 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-12-13 17:56:32,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 17:56:32,574 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:56:32,574 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:56:32,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 17:56:32,574 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:56:32,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:56:32,574 INFO L85 PathProgramCache]: Analyzing trace with hash 2076073376, now seen corresponding path program 1 times [2022-12-13 17:56:32,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:56:32,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287063538] [2022-12-13 17:56:32,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:56:32,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:56:32,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:56:32,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:56:32,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:56:32,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287063538] [2022-12-13 17:56:32,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287063538] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:56:32,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:56:32,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:56:32,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223239991] [2022-12-13 17:56:32,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:56:32,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:56:32,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:56:32,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:56:32,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:56:32,630 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:32,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:56:32,668 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2022-12-13 17:56:32,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:56:32,668 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-13 17:56:32,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:56:32,669 INFO L225 Difference]: With dead ends: 48 [2022-12-13 17:56:32,669 INFO L226 Difference]: Without dead ends: 48 [2022-12-13 17:56:32,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:56:32,669 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 33 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:56:32,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 37 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:56:32,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-12-13 17:56:32,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2022-12-13 17:56:32,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:32,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2022-12-13 17:56:32,672 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 11 [2022-12-13 17:56:32,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:56:32,672 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2022-12-13 17:56:32,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:32,672 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2022-12-13 17:56:32,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-13 17:56:32,673 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:56:32,673 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:56:32,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 17:56:32,673 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:56:32,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:56:32,673 INFO L85 PathProgramCache]: Analyzing trace with hash -66235978, now seen corresponding path program 1 times [2022-12-13 17:56:32,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:56:32,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827746513] [2022-12-13 17:56:32,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:56:32,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:56:32,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:56:32,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:56:32,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:56:32,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827746513] [2022-12-13 17:56:32,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827746513] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:56:32,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:56:32,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:56:32,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818120494] [2022-12-13 17:56:32,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:56:32,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:56:32,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:56:32,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:56:32,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:56:32,701 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:32,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:56:32,722 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2022-12-13 17:56:32,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:56:32,722 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-13 17:56:32,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:56:32,723 INFO L225 Difference]: With dead ends: 45 [2022-12-13 17:56:32,723 INFO L226 Difference]: Without dead ends: 45 [2022-12-13 17:56:32,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:56:32,723 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 31 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:56:32,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 40 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:56:32,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-13 17:56:32,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2022-12-13 17:56:32,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 43 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:32,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2022-12-13 17:56:32,726 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 12 [2022-12-13 17:56:32,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:56:32,726 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2022-12-13 17:56:32,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:32,726 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2022-12-13 17:56:32,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-13 17:56:32,726 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:56:32,727 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:56:32,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 17:56:32,727 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:56:32,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:56:32,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1848753290, now seen corresponding path program 1 times [2022-12-13 17:56:32,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:56:32,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553335673] [2022-12-13 17:56:32,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:56:32,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:56:32,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:56:32,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:56:32,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:56:32,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553335673] [2022-12-13 17:56:32,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553335673] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:56:32,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168966798] [2022-12-13 17:56:32,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:56:32,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:56:32,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:56:32,797 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:56:32,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 17:56:32,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:56:32,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:56:32,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:56:32,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:56:32,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:56:32,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168966798] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:56:32,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 17:56:32,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2022-12-13 17:56:32,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364407520] [2022-12-13 17:56:32,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:56:32,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 17:56:32,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:56:32,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 17:56:32,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-12-13 17:56:32,932 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:33,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:56:33,000 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2022-12-13 17:56:33,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 17:56:33,000 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-13 17:56:33,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:56:33,001 INFO L225 Difference]: With dead ends: 67 [2022-12-13 17:56:33,001 INFO L226 Difference]: Without dead ends: 67 [2022-12-13 17:56:33,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-13 17:56:33,002 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 58 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:56:33,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 62 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:56:33,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-12-13 17:56:33,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 43. [2022-12-13 17:56:33,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.263157894736842) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:33,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-12-13 17:56:33,007 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 14 [2022-12-13 17:56:33,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:56:33,007 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-12-13 17:56:33,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:33,007 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-12-13 17:56:33,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-13 17:56:33,008 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:56:33,008 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:56:33,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 17:56:33,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:56:33,209 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:56:33,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:56:33,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1810540493, now seen corresponding path program 1 times [2022-12-13 17:56:33,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:56:33,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645965737] [2022-12-13 17:56:33,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:56:33,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:56:33,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:56:33,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:56:33,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:56:33,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645965737] [2022-12-13 17:56:33,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645965737] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:56:33,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718857987] [2022-12-13 17:56:33,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:56:33,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:56:33,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:56:33,253 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:56:33,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 17:56:33,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:56:33,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 17:56:33,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:56:33,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:56:33,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:56:33,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718857987] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:56:33,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 17:56:33,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-12-13 17:56:33,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625078149] [2022-12-13 17:56:33,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:56:33,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:56:33,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:56:33,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:56:33,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 17:56:33,345 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:33,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:56:33,372 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2022-12-13 17:56:33,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:56:33,372 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-13 17:56:33,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:56:33,372 INFO L225 Difference]: With dead ends: 56 [2022-12-13 17:56:33,372 INFO L226 Difference]: Without dead ends: 56 [2022-12-13 17:56:33,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 17:56:33,373 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:56:33,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 65 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:56:33,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-12-13 17:56:33,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2022-12-13 17:56:33,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:33,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2022-12-13 17:56:33,377 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 15 [2022-12-13 17:56:33,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:56:33,377 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2022-12-13 17:56:33,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:33,378 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2022-12-13 17:56:33,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-13 17:56:33,378 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:56:33,378 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:56:33,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 17:56:33,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:56:33,580 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:56:33,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:56:33,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1897620789, now seen corresponding path program 1 times [2022-12-13 17:56:33,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:56:33,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320402045] [2022-12-13 17:56:33,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:56:33,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:56:33,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:56:33,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:56:33,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:56:33,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320402045] [2022-12-13 17:56:33,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320402045] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:56:33,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828690707] [2022-12-13 17:56:33,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:56:33,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:56:33,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:56:33,701 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:56:33,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 17:56:33,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:56:33,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 17:56:33,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:56:33,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:56:33,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 17:56:33,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828690707] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:56:33,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 17:56:33,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2022-12-13 17:56:33,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376383419] [2022-12-13 17:56:33,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:56:33,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 17:56:33,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:56:33,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 17:56:33,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-12-13 17:56:33,788 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:33,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:56:33,834 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2022-12-13 17:56:33,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 17:56:33,835 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-13 17:56:33,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:56:33,835 INFO L225 Difference]: With dead ends: 68 [2022-12-13 17:56:33,836 INFO L226 Difference]: Without dead ends: 68 [2022-12-13 17:56:33,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-13 17:56:33,836 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 39 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:56:33,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 71 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:56:33,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-12-13 17:56:33,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 53. [2022-12-13 17:56:33,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:33,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2022-12-13 17:56:33,841 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 15 [2022-12-13 17:56:33,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:56:33,841 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2022-12-13 17:56:33,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:33,841 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2022-12-13 17:56:33,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-13 17:56:33,842 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:56:33,842 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:56:33,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 17:56:34,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 17:56:34,043 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:56:34,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:56:34,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1476777172, now seen corresponding path program 1 times [2022-12-13 17:56:34,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:56:34,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251087951] [2022-12-13 17:56:34,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:56:34,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:56:34,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:56:34,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:56:34,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:56:34,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251087951] [2022-12-13 17:56:34,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251087951] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:56:34,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253721294] [2022-12-13 17:56:34,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:56:34,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:56:34,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:56:34,247 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:56:34,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 17:56:34,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:56:34,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 17:56:34,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:56:34,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-12-13 17:56:34,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:56:34,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:56:34,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:56:34,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253721294] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:56:34,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:56:34,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 21 [2022-12-13 17:56:34,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354294453] [2022-12-13 17:56:34,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:56:34,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 17:56:34,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:56:34,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 17:56:34,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2022-12-13 17:56:34,811 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:35,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:56:35,026 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2022-12-13 17:56:35,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 17:56:35,027 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-13 17:56:35,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:56:35,027 INFO L225 Difference]: With dead ends: 57 [2022-12-13 17:56:35,027 INFO L226 Difference]: Without dead ends: 57 [2022-12-13 17:56:35,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=455, Unknown=0, NotChecked=0, Total=650 [2022-12-13 17:56:35,029 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 106 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:56:35,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 97 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:56:35,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-12-13 17:56:35,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2022-12-13 17:56:35,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 49 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:35,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2022-12-13 17:56:35,033 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 15 [2022-12-13 17:56:35,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:56:35,034 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2022-12-13 17:56:35,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:35,034 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2022-12-13 17:56:35,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-13 17:56:35,035 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:56:35,035 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:56:35,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 17:56:35,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 17:56:35,236 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:56:35,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:56:35,236 INFO L85 PathProgramCache]: Analyzing trace with hash -292181629, now seen corresponding path program 1 times [2022-12-13 17:56:35,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:56:35,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688617417] [2022-12-13 17:56:35,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:56:35,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:56:35,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:56:35,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:56:35,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:56:35,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688617417] [2022-12-13 17:56:35,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688617417] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:56:35,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:56:35,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:56:35,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393196467] [2022-12-13 17:56:35,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:56:35,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:56:35,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:56:35,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:56:35,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:56:35,308 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:35,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:56:35,323 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2022-12-13 17:56:35,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:56:35,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-13 17:56:35,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:56:35,324 INFO L225 Difference]: With dead ends: 49 [2022-12-13 17:56:35,324 INFO L226 Difference]: Without dead ends: 32 [2022-12-13 17:56:35,324 INFO L412 NwaCegarLoop]: 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 [2022-12-13 17:56:35,324 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 14 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:56:35,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 40 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:56:35,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-12-13 17:56:35,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-12-13 17:56:35,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 29 states have (on average 1.206896551724138) internal successors, (35), 31 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:35,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-12-13 17:56:35,327 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 16 [2022-12-13 17:56:35,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:56:35,327 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-12-13 17:56:35,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:35,327 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-12-13 17:56:35,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-13 17:56:35,328 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:56:35,328 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:56:35,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 17:56:35,328 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:56:35,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:56:35,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1219047748, now seen corresponding path program 1 times [2022-12-13 17:56:35,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:56:35,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117237358] [2022-12-13 17:56:35,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:56:35,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:56:35,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:56:35,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:56:35,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:56:35,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117237358] [2022-12-13 17:56:35,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117237358] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:56:35,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110818826] [2022-12-13 17:56:35,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:56:35,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:56:35,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:56:35,443 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:56:35,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 17:56:35,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:56:35,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 17:56:35,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:56:35,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:56:35,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:56:35,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-12-13 17:56:35,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:56:35,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110818826] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:56:35,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:56:35,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2022-12-13 17:56:35,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12726988] [2022-12-13 17:56:35,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:56:35,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 17:56:35,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:56:35,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 17:56:35,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-12-13 17:56:35,680 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 18 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:35,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:56:35,823 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2022-12-13 17:56:35,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 17:56:35,823 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-12-13 17:56:35,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:56:35,824 INFO L225 Difference]: With dead ends: 44 [2022-12-13 17:56:35,824 INFO L226 Difference]: Without dead ends: 44 [2022-12-13 17:56:35,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2022-12-13 17:56:35,825 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 152 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:56:35,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 70 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:56:35,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-12-13 17:56:35,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 33. [2022-12-13 17:56:35,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:35,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-12-13 17:56:35,827 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 20 [2022-12-13 17:56:35,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:56:35,827 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-12-13 17:56:35,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:35,827 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-12-13 17:56:35,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-13 17:56:35,828 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:56:35,828 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:56:35,832 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 17:56:36,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 17:56:36,029 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:56:36,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:56:36,029 INFO L85 PathProgramCache]: Analyzing trace with hash 2107104079, now seen corresponding path program 2 times [2022-12-13 17:56:36,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:56:36,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121391582] [2022-12-13 17:56:36,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:56:36,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:56:36,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:56:36,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:56:36,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:56:36,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121391582] [2022-12-13 17:56:36,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121391582] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:56:36,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388048389] [2022-12-13 17:56:36,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:56:36,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:56:36,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:56:36,094 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:56:36,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 17:56:36,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:56:36,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:56:36,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 17:56:36,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:56:36,193 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:56:36,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:56:36,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:56:36,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388048389] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:56:36,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:56:36,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-12-13 17:56:36,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596644444] [2022-12-13 17:56:36,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:56:36,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 17:56:36,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:56:36,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 17:56:36,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-12-13 17:56:36,239 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:36,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:56:36,332 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-12-13 17:56:36,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 17:56:36,332 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-12-13 17:56:36,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:56:36,333 INFO L225 Difference]: With dead ends: 60 [2022-12-13 17:56:36,333 INFO L226 Difference]: Without dead ends: 42 [2022-12-13 17:56:36,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2022-12-13 17:56:36,334 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 44 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:56:36,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 109 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:56:36,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-12-13 17:56:36,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2022-12-13 17:56:36,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:36,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2022-12-13 17:56:36,337 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 24 [2022-12-13 17:56:36,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:56:36,337 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2022-12-13 17:56:36,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:36,337 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2022-12-13 17:56:36,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-13 17:56:36,338 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:56:36,338 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:56:36,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 17:56:36,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 17:56:36,538 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 17:56:36,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:56:36,539 INFO L85 PathProgramCache]: Analyzing trace with hash -69387864, now seen corresponding path program 3 times [2022-12-13 17:56:36,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:56:36,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106603898] [2022-12-13 17:56:36,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:56:36,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:56:36,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:56:36,665 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:56:36,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:56:36,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106603898] [2022-12-13 17:56:36,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106603898] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:56:36,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644758003] [2022-12-13 17:56:36,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:56:36,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:56:36,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:56:36,667 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:56:36,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 17:56:36,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 17:56:36,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:56:36,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 17:56:36,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:56:36,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-12-13 17:56:37,102 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 17:56:37,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:56:37,360 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 17:56:37,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644758003] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:56:37,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:56:37,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2022-12-13 17:56:37,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311722240] [2022-12-13 17:56:37,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:56:37,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 17:56:37,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:56:37,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 17:56:37,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-12-13 17:56:37,362 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 21 states, 20 states have (on average 3.65) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:37,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:56:37,882 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2022-12-13 17:56:37,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 17:56:37,883 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.65) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-12-13 17:56:37,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:56:37,883 INFO L225 Difference]: With dead ends: 53 [2022-12-13 17:56:37,883 INFO L226 Difference]: Without dead ends: 0 [2022-12-13 17:56:37,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=261, Invalid=669, Unknown=0, NotChecked=0, Total=930 [2022-12-13 17:56:37,884 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 146 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:56:37,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 89 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:56:37,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-12-13 17:56:37,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-12-13 17:56:37,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:37,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-12-13 17:56:37,885 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2022-12-13 17:56:37,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:56:37,886 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-12-13 17:56:37,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.65) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:56:37,886 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-12-13 17:56:37,886 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-12-13 17:56:37,888 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 13 remaining) [2022-12-13 17:56:37,889 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 13 remaining) [2022-12-13 17:56:37,889 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 13 remaining) [2022-12-13 17:56:37,889 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 13 remaining) [2022-12-13 17:56:37,889 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 13 remaining) [2022-12-13 17:56:37,889 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2022-12-13 17:56:37,889 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 13 remaining) [2022-12-13 17:56:37,889 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 13 remaining) [2022-12-13 17:56:37,890 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 13 remaining) [2022-12-13 17:56:37,890 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 13 remaining) [2022-12-13 17:56:37,890 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 13 remaining) [2022-12-13 17:56:37,890 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 13 remaining) [2022-12-13 17:56:37,890 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (0 of 13 remaining) [2022-12-13 17:56:37,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 17:56:38,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 17:56:38,094 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:56:38,095 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 17:56:38,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 05:56:38 BoogieIcfgContainer [2022-12-13 17:56:38,098 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 17:56:38,098 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 17:56:38,098 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 17:56:38,099 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 17:56:38,099 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:56:31" (3/4) ... [2022-12-13 17:56:38,101 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-12-13 17:56:38,107 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2022-12-13 17:56:38,108 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-12-13 17:56:38,108 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-12-13 17:56:38,108 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-12-13 17:56:38,138 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/witness.graphml [2022-12-13 17:56:38,138 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 17:56:38,139 INFO L158 Benchmark]: Toolchain (without parser) took 7450.82ms. Allocated memory was 163.6MB in the beginning and 197.1MB in the end (delta: 33.6MB). Free memory was 116.0MB in the beginning and 132.0MB in the end (delta: -16.0MB). Peak memory consumption was 20.4MB. Max. memory is 16.1GB. [2022-12-13 17:56:38,139 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 163.6MB. Free memory was 133.5MB in the beginning and 133.3MB in the end (delta: 141.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 17:56:38,139 INFO L158 Benchmark]: CACSL2BoogieTranslator took 325.81ms. Allocated memory is still 163.6MB. Free memory was 116.0MB in the beginning and 98.9MB in the end (delta: 17.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-12-13 17:56:38,139 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.81ms. Allocated memory is still 163.6MB. Free memory was 98.9MB in the beginning and 96.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 17:56:38,140 INFO L158 Benchmark]: Boogie Preprocessor took 20.98ms. Allocated memory is still 163.6MB. Free memory was 96.8MB in the beginning and 95.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 17:56:38,140 INFO L158 Benchmark]: RCFGBuilder took 263.58ms. Allocated memory is still 163.6MB. Free memory was 95.5MB in the beginning and 83.0MB in the end (delta: 12.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-13 17:56:38,140 INFO L158 Benchmark]: TraceAbstraction took 6762.52ms. Allocated memory was 163.6MB in the beginning and 197.1MB in the end (delta: 33.6MB). Free memory was 82.1MB in the beginning and 134.9MB in the end (delta: -52.8MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 17:56:38,140 INFO L158 Benchmark]: Witness Printer took 40.10ms. Allocated memory is still 197.1MB. Free memory was 133.8MB in the beginning and 132.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 17:56:38,142 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 163.6MB. Free memory was 133.5MB in the beginning and 133.3MB in the end (delta: 141.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 325.81ms. Allocated memory is still 163.6MB. Free memory was 116.0MB in the beginning and 98.9MB in the end (delta: 17.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.81ms. Allocated memory is still 163.6MB. Free memory was 98.9MB in the beginning and 96.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.98ms. Allocated memory is still 163.6MB. Free memory was 96.8MB in the beginning and 95.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 263.58ms. Allocated memory is still 163.6MB. Free memory was 95.5MB in the beginning and 83.0MB in the end (delta: 12.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 6762.52ms. Allocated memory was 163.6MB in the beginning and 197.1MB in the end (delta: 33.6MB). Free memory was 82.1MB in the beginning and 134.9MB in the end (delta: -52.8MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 40.10ms. Allocated memory is still 197.1MB. Free memory was 133.8MB in the beginning and 132.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * 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 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 364]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 38 locations, 13 error locations. Started 1 CEGAR loops. OverallTime: 6.7s, OverallIterations: 17, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1051 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1051 mSDsluCounter, 920 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 590 mSDsCounter, 34 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1025 IncrementalHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 34 mSolverCounterUnsat, 330 mSDtfsCounter, 1025 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 323 GetRequests, 179 SyntacticMatches, 6 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred in iteration=11, InterpolantAutomatonStates: 102, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 146 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 355 NumberOfCodeBlocks, 346 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 415 ConstructedInterpolants, 0 QuantifiedInterpolants, 4250 SizeOfPredicates, 19 NumberOfNonLiveVariables, 467 ConjunctsInSsa, 59 ConjunctsInUnsatCore, 28 InterpolantComputations, 13 PerfectInterpolantSequences, 51/103 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 - AllSpecificationsHoldResult: All specifications hold 13 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-12-13 17:56:38,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522d96c4-9417-47b8-a884-fc0caeeb7440/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE