./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/25_stack_longer-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d03be3e-ab0c-4bbc-811f-5497b54f0ef8/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d03be3e-ab0c-4bbc-811f-5497b54f0ef8/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d03be3e-ab0c-4bbc-811f-5497b54f0ef8/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d03be3e-ab0c-4bbc-811f-5497b54f0ef8/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/25_stack_longer-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d03be3e-ab0c-4bbc-811f-5497b54f0ef8/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d03be3e-ab0c-4bbc-811f-5497b54f0ef8/bin/utaipan-gh47qXpMRh --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 71de1c8da7c81d1cb6f2035741a17645b8c79e199c0fda7e542c1cb232593d6b --- 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 [2022-12-14 07:11:30,755 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:11:30,757 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:11:30,769 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:11:30,769 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:11:30,770 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:11:30,771 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:11:30,772 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:11:30,773 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:11:30,773 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:11:30,774 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:11:30,775 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:11:30,775 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:11:30,775 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:11:30,776 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:11:30,777 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:11:30,777 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:11:30,778 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:11:30,779 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:11:30,780 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:11:30,781 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:11:30,783 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:11:30,784 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:11:30,785 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:11:30,787 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:11:30,787 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:11:30,787 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:11:30,788 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:11:30,789 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:11:30,789 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:11:30,789 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:11:30,790 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:11:30,790 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:11:30,791 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:11:30,791 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:11:30,791 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:11:30,792 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:11:30,792 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:11:30,792 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:11:30,792 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:11:30,793 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:11:30,793 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d03be3e-ab0c-4bbc-811f-5497b54f0ef8/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 07:11:30,808 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:11:30,808 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:11:30,808 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:11:30,808 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:11:30,808 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:11:30,809 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:11:30,809 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:11:30,809 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:11:30,809 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:11:30,809 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 07:11:30,809 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:11:30,809 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:11:30,809 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 07:11:30,809 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 07:11:30,809 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:11:30,810 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 07:11:30,810 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 07:11:30,810 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 07:11:30,810 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 07:11:30,810 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 07:11:30,810 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:11:30,811 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:11:30,811 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 07:11:30,811 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:11:30,811 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:11:30,811 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:11:30,811 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 07:11:30,811 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 07:11:30,811 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 07:11:30,811 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:11:30,811 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 07:11:30,811 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:11:30,812 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:11:30,812 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:11:30,812 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:11:30,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:11:30,812 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:11:30,812 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 07:11:30,812 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:11:30,812 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 07:11:30,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 07:11:30,812 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:11:30,813 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d03be3e-ab0c-4bbc-811f-5497b54f0ef8/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d03be3e-ab0c-4bbc-811f-5497b54f0ef8/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71de1c8da7c81d1cb6f2035741a17645b8c79e199c0fda7e542c1cb232593d6b [2022-12-14 07:11:30,980 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:11:30,997 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:11:31,000 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:11:31,001 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:11:31,001 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:11:31,002 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d03be3e-ab0c-4bbc-811f-5497b54f0ef8/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/pthread-ext/25_stack_longer-1.i [2022-12-14 07:11:33,534 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:11:33,737 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:11:33,737 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d03be3e-ab0c-4bbc-811f-5497b54f0ef8/sv-benchmarks/c/pthread-ext/25_stack_longer-1.i [2022-12-14 07:11:33,748 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d03be3e-ab0c-4bbc-811f-5497b54f0ef8/bin/utaipan-gh47qXpMRh/data/febf6dd74/ad335ccc157f47c4baa4a19e2b2c7bbf/FLAG94b1fb689 [2022-12-14 07:11:34,084 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d03be3e-ab0c-4bbc-811f-5497b54f0ef8/bin/utaipan-gh47qXpMRh/data/febf6dd74/ad335ccc157f47c4baa4a19e2b2c7bbf [2022-12-14 07:11:34,086 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:11:34,087 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:11:34,089 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:11:34,089 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:11:34,092 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:11:34,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:11:34" (1/1) ... [2022-12-14 07:11:34,093 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52661184 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:11:34, skipping insertion in model container [2022-12-14 07:11:34,094 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:11:34" (1/1) ... [2022-12-14 07:11:34,100 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:11:34,124 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:11:34,328 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d03be3e-ab0c-4bbc-811f-5497b54f0ef8/sv-benchmarks/c/pthread-ext/25_stack_longer-1.i[31042,31055] [2022-12-14 07:11:34,336 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:11:34,345 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 07:11:34,370 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d03be3e-ab0c-4bbc-811f-5497b54f0ef8/sv-benchmarks/c/pthread-ext/25_stack_longer-1.i[31042,31055] [2022-12-14 07:11:34,373 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:11:34,394 INFO L208 MainTranslator]: Completed translation [2022-12-14 07:11:34,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:11:34 WrapperNode [2022-12-14 07:11:34,394 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:11:34,395 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 07:11:34,395 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 07:11:34,395 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 07:11:34,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:11:34" (1/1) ... [2022-12-14 07:11:34,409 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:11:34" (1/1) ... [2022-12-14 07:11:34,426 INFO L138 Inliner]: procedures = 177, calls = 34, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 174 [2022-12-14 07:11:34,426 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 07:11:34,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 07:11:34,427 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 07:11:34,427 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 07:11:34,434 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:11:34" (1/1) ... [2022-12-14 07:11:34,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:11:34" (1/1) ... [2022-12-14 07:11:34,436 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:11:34" (1/1) ... [2022-12-14 07:11:34,436 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:11:34" (1/1) ... [2022-12-14 07:11:34,440 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:11:34" (1/1) ... [2022-12-14 07:11:34,443 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:11:34" (1/1) ... [2022-12-14 07:11:34,444 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:11:34" (1/1) ... [2022-12-14 07:11:34,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:11:34" (1/1) ... [2022-12-14 07:11:34,447 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 07:11:34,448 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 07:11:34,448 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 07:11:34,448 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 07:11:34,449 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:11:34" (1/1) ... [2022-12-14 07:11:34,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:11:34,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d03be3e-ab0c-4bbc-811f-5497b54f0ef8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:11:34,474 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d03be3e-ab0c-4bbc-811f-5497b54f0ef8/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 07:11:34,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d03be3e-ab0c-4bbc-811f-5497b54f0ef8/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 07:11:34,511 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 07:11:34,511 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-12-14 07:11:34,511 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-12-14 07:11:34,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 07:11:34,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 07:11:34,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 07:11:34,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 07:11:34,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 07:11:34,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 07:11:34,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 07:11:34,513 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-14 07:11:34,621 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 07:11:34,623 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 07:11:34,925 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:11:35,075 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:11:35,076 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 07:11:35,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:11:35 BoogieIcfgContainer [2022-12-14 07:11:35,078 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:11:35,079 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:11:35,079 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:11:35,081 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:11:35,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:11:34" (1/3) ... [2022-12-14 07:11:35,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4428c11e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:11:35, skipping insertion in model container [2022-12-14 07:11:35,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:11:34" (2/3) ... [2022-12-14 07:11:35,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4428c11e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:11:35, skipping insertion in model container [2022-12-14 07:11:35,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:11:35" (3/3) ... [2022-12-14 07:11:35,083 INFO L112 eAbstractionObserver]: Analyzing ICFG 25_stack_longer-1.i [2022-12-14 07:11:35,097 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:11:35,097 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2022-12-14 07:11:35,097 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 07:11:35,158 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 07:11:35,181 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 07:11:35,191 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 140 places, 144 transitions, 293 flow [2022-12-14 07:11:35,193 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 140 places, 144 transitions, 293 flow [2022-12-14 07:11:35,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 144 transitions, 293 flow [2022-12-14 07:11:35,236 INFO L130 PetriNetUnfolder]: 8/160 cut-off events. [2022-12-14 07:11:35,236 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-14 07:11:35,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 160 events. 8/160 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 301 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 118. Up to 4 conditions per place. [2022-12-14 07:11:35,242 INFO L119 LiptonReduction]: Number of co-enabled transitions 3800 [2022-12-14 07:11:40,900 INFO L134 LiptonReduction]: Checked pairs total: 4895 [2022-12-14 07:11:40,900 INFO L136 LiptonReduction]: Total number of compositions: 182 [2022-12-14 07:11:40,906 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 51 places, 52 transitions, 109 flow [2022-12-14 07:11:40,926 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 325 states, 163 states have (on average 3.8466257668711656) internal successors, (627), 324 states have internal predecessors, (627), 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) [2022-12-14 07:11:40,939 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:11:40,943 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@49527291, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:11:40,944 INFO L358 AbstractCegarLoop]: Starting to check reachability of 66 error locations. [2022-12-14 07:11:40,946 INFO L276 IsEmpty]: Start isEmpty. Operand has 325 states, 163 states have (on average 3.8466257668711656) internal successors, (627), 324 states have internal predecessors, (627), 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) [2022-12-14 07:11:40,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 07:11:40,949 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:11:40,949 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 07:11:40,950 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 63 more)] === [2022-12-14 07:11:40,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:11:40,953 INFO L85 PathProgramCache]: Analyzing trace with hash 31425, now seen corresponding path program 1 times [2022-12-14 07:11:40,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:11:40,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899064255] [2022-12-14 07:11:40,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:11:40,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:11:41,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:11:41,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:11:41,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:11:41,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899064255] [2022-12-14 07:11:41,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899064255] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:11:41,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:11:41,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:11:41,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064405968] [2022-12-14 07:11:41,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:11:41,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:11:41,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:11:41,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:11:41,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:11:41,130 INFO L87 Difference]: Start difference. First operand has 325 states, 163 states have (on average 3.8466257668711656) internal successors, (627), 324 states have internal predecessors, (627), 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, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-12-14 07:11:41,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:11:41,180 INFO L93 Difference]: Finished difference Result 94 states and 176 transitions. [2022-12-14 07:11:41,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:11:41,182 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-12-14 07:11:41,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:11:41,187 INFO L225 Difference]: With dead ends: 94 [2022-12-14 07:11:41,188 INFO L226 Difference]: Without dead ends: 94 [2022-12-14 07:11:41,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:11:41,190 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:11:41,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 1 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:11:41,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-12-14 07:11:41,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-12-14 07:11:41,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 73 states have (on average 2.410958904109589) internal successors, (176), 93 states have internal predecessors, (176), 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) [2022-12-14 07:11:41,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 176 transitions. [2022-12-14 07:11:41,216 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 176 transitions. Word has length 2 [2022-12-14 07:11:41,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:11:41,216 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 176 transitions. [2022-12-14 07:11:41,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-12-14 07:11:41,217 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 176 transitions. [2022-12-14 07:11:41,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 07:11:41,217 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:11:41,217 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 07:11:41,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 07:11:41,217 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 63 more)] === [2022-12-14 07:11:41,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:11:41,218 INFO L85 PathProgramCache]: Analyzing trace with hash 31426, now seen corresponding path program 1 times [2022-12-14 07:11:41,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:11:41,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463544778] [2022-12-14 07:11:41,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:11:41,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:11:41,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:11:41,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:11:41,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:11:41,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463544778] [2022-12-14 07:11:41,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463544778] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:11:41,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:11:41,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:11:41,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578825635] [2022-12-14 07:11:41,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:11:41,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:11:41,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:11:41,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:11:41,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:11:41,290 INFO L87 Difference]: Start difference. First operand 94 states and 176 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-12-14 07:11:41,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:11:41,331 INFO L93 Difference]: Finished difference Result 75 states and 137 transitions. [2022-12-14 07:11:41,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:11:41,331 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-12-14 07:11:41,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:11:41,332 INFO L225 Difference]: With dead ends: 75 [2022-12-14 07:11:41,332 INFO L226 Difference]: Without dead ends: 75 [2022-12-14 07:11:41,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:11:41,333 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 24 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:11:41,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 1 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:11:41,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-12-14 07:11:41,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-12-14 07:11:41,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 74 states have internal predecessors, (137), 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) [2022-12-14 07:11:41,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 137 transitions. [2022-12-14 07:11:41,338 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 137 transitions. Word has length 2 [2022-12-14 07:11:41,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:11:41,338 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 137 transitions. [2022-12-14 07:11:41,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-12-14 07:11:41,339 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 137 transitions. [2022-12-14 07:11:41,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 07:11:41,339 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:11:41,339 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 07:11:41,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 07:11:41,339 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 63 more)] === [2022-12-14 07:11:41,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:11:41,340 INFO L85 PathProgramCache]: Analyzing trace with hash 30226059, now seen corresponding path program 1 times [2022-12-14 07:11:41,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:11:41,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823567249] [2022-12-14 07:11:41,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:11:41,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:11:41,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:11:41,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:11:41,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:11:41,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823567249] [2022-12-14 07:11:41,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823567249] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:11:41,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:11:41,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:11:41,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091086049] [2022-12-14 07:11:41,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:11:41,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:11:41,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:11:41,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:11:41,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:11:41,448 INFO L87 Difference]: Start difference. First operand 75 states and 137 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-12-14 07:11:41,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:11:41,495 INFO L93 Difference]: Finished difference Result 71 states and 130 transitions. [2022-12-14 07:11:41,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:11:41,495 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2022-12-14 07:11:41,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:11:41,496 INFO L225 Difference]: With dead ends: 71 [2022-12-14 07:11:41,496 INFO L226 Difference]: Without dead ends: 71 [2022-12-14 07:11:41,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:11:41,498 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 44 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:11:41,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 1 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:11:41,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-12-14 07:11:41,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-12-14 07:11:41,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 62 states have (on average 2.096774193548387) internal successors, (130), 70 states have internal predecessors, (130), 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) [2022-12-14 07:11:41,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 130 transitions. [2022-12-14 07:11:41,504 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 130 transitions. Word has length 4 [2022-12-14 07:11:41,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:11:41,505 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 130 transitions. [2022-12-14 07:11:41,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-12-14 07:11:41,505 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 130 transitions. [2022-12-14 07:11:41,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 07:11:41,505 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:11:41,505 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 07:11:41,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 07:11:41,506 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 63 more)] === [2022-12-14 07:11:41,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:11:41,506 INFO L85 PathProgramCache]: Analyzing trace with hash 30226060, now seen corresponding path program 1 times [2022-12-14 07:11:41,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:11:41,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881867137] [2022-12-14 07:11:41,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:11:41,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:11:41,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:11:41,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:11:41,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:11:41,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881867137] [2022-12-14 07:11:41,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881867137] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:11:41,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:11:41,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:11:41,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15727637] [2022-12-14 07:11:41,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:11:41,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:11:41,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:11:41,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:11:41,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:11:41,622 INFO L87 Difference]: Start difference. First operand 71 states and 130 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-12-14 07:11:41,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:11:41,658 INFO L93 Difference]: Finished difference Result 67 states and 123 transitions. [2022-12-14 07:11:41,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:11:41,659 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2022-12-14 07:11:41,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:11:41,659 INFO L225 Difference]: With dead ends: 67 [2022-12-14 07:11:41,660 INFO L226 Difference]: Without dead ends: 67 [2022-12-14 07:11:41,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:11:41,660 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 22 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:11:41,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 1 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:11:41,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-12-14 07:11:41,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-12-14 07:11:41,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 66 states have internal predecessors, (123), 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) [2022-12-14 07:11:41,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 123 transitions. [2022-12-14 07:11:41,664 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 123 transitions. Word has length 4 [2022-12-14 07:11:41,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:11:41,664 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 123 transitions. [2022-12-14 07:11:41,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-12-14 07:11:41,665 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 123 transitions. [2022-12-14 07:11:41,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 07:11:41,665 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:11:41,665 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 07:11:41,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 07:11:41,665 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 63 more)] === [2022-12-14 07:11:41,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:11:41,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1017355512, now seen corresponding path program 1 times [2022-12-14 07:11:41,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:11:41,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228918662] [2022-12-14 07:11:41,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:11:41,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:11:41,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:11:41,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:11:41,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:11:41,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228918662] [2022-12-14 07:11:41,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228918662] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:11:41,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:11:41,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:11:41,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71330708] [2022-12-14 07:11:41,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:11:41,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:11:41,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:11:41,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:11:41,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:11:41,757 INFO L87 Difference]: Start difference. First operand 67 states and 123 transitions. Second operand has 4 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) [2022-12-14 07:11:41,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:11:41,791 INFO L93 Difference]: Finished difference Result 59 states and 109 transitions. [2022-12-14 07:11:41,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:11:41,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 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 [2022-12-14 07:11:41,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:11:41,793 INFO L225 Difference]: With dead ends: 59 [2022-12-14 07:11:41,793 INFO L226 Difference]: Without dead ends: 59 [2022-12-14 07:11:41,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:11:41,794 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:11:41,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 1 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:11:41,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-12-14 07:11:41,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-12-14 07:11:41,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 2.056603773584906) internal successors, (109), 58 states have internal predecessors, (109), 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) [2022-12-14 07:11:41,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 109 transitions. [2022-12-14 07:11:41,798 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 109 transitions. Word has length 6 [2022-12-14 07:11:41,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:11:41,798 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 109 transitions. [2022-12-14 07:11:41,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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) [2022-12-14 07:11:41,798 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 109 transitions. [2022-12-14 07:11:41,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 07:11:41,799 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:11:41,799 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 07:11:41,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 07:11:41,799 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 63 more)] === [2022-12-14 07:11:41,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:11:41,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1017355511, now seen corresponding path program 1 times [2022-12-14 07:11:41,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:11:41,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209772] [2022-12-14 07:11:41,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:11:41,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:11:41,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:11:41,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:11:41,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:11:41,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209772] [2022-12-14 07:11:41,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209772] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:11:41,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:11:41,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:11:41,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487060555] [2022-12-14 07:11:41,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:11:41,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:11:41,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:11:41,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:11:41,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:11:41,909 INFO L87 Difference]: Start difference. First operand 59 states and 109 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2022-12-14 07:11:41,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:11:41,941 INFO L93 Difference]: Finished difference Result 51 states and 95 transitions. [2022-12-14 07:11:41,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:11:41,941 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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 [2022-12-14 07:11:41,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:11:41,942 INFO L225 Difference]: With dead ends: 51 [2022-12-14 07:11:41,942 INFO L226 Difference]: Without dead ends: 51 [2022-12-14 07:11:41,942 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 [2022-12-14 07:11:41,943 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 14 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:11:41,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 1 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:11:41,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-12-14 07:11:41,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-12-14 07:11:41,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 47 states have (on average 2.021276595744681) internal successors, (95), 50 states have internal predecessors, (95), 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) [2022-12-14 07:11:41,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 95 transitions. [2022-12-14 07:11:41,948 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 95 transitions. Word has length 6 [2022-12-14 07:11:41,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:11:41,948 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 95 transitions. [2022-12-14 07:11:41,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2022-12-14 07:11:41,948 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 95 transitions. [2022-12-14 07:11:41,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 07:11:41,949 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:11:41,949 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-12-14 07:11:41,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 07:11:41,949 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 63 more)] === [2022-12-14 07:11:41,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:11:41,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1017448056, now seen corresponding path program 1 times [2022-12-14 07:11:41,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:11:41,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918617590] [2022-12-14 07:11:41,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:11:41,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:11:41,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 07:11:41,955 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 07:11:41,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 07:11:41,971 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 07:11:41,972 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 07:11:41,972 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (65 of 66 remaining) [2022-12-14 07:11:41,974 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 66 remaining) [2022-12-14 07:11:41,974 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 66 remaining) [2022-12-14 07:11:41,974 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 66 remaining) [2022-12-14 07:11:41,974 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 66 remaining) [2022-12-14 07:11:41,974 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 66 remaining) [2022-12-14 07:11:41,974 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 66 remaining) [2022-12-14 07:11:41,974 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 66 remaining) [2022-12-14 07:11:41,975 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 66 remaining) [2022-12-14 07:11:41,975 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 66 remaining) [2022-12-14 07:11:41,975 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 66 remaining) [2022-12-14 07:11:41,975 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 66 remaining) [2022-12-14 07:11:41,975 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 66 remaining) [2022-12-14 07:11:41,975 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 66 remaining) [2022-12-14 07:11:41,975 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 66 remaining) [2022-12-14 07:11:41,975 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 66 remaining) [2022-12-14 07:11:41,975 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 66 remaining) [2022-12-14 07:11:41,975 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 66 remaining) [2022-12-14 07:11:41,975 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 66 remaining) [2022-12-14 07:11:41,975 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 66 remaining) [2022-12-14 07:11:41,975 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 66 remaining) [2022-12-14 07:11:41,976 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (44 of 66 remaining) [2022-12-14 07:11:41,976 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 66 remaining) [2022-12-14 07:11:41,976 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 66 remaining) [2022-12-14 07:11:41,976 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 66 remaining) [2022-12-14 07:11:41,976 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 66 remaining) [2022-12-14 07:11:41,976 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (39 of 66 remaining) [2022-12-14 07:11:41,976 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30ASSERT_VIOLATIONMEMORY_LEAK (38 of 66 remaining) [2022-12-14 07:11:41,976 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 66 remaining) [2022-12-14 07:11:41,976 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 66 remaining) [2022-12-14 07:11:41,976 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 66 remaining) [2022-12-14 07:11:41,976 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 66 remaining) [2022-12-14 07:11:41,976 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 66 remaining) [2022-12-14 07:11:41,977 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 66 remaining) [2022-12-14 07:11:41,977 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (31 of 66 remaining) [2022-12-14 07:11:41,977 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 66 remaining) [2022-12-14 07:11:41,977 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 66 remaining) [2022-12-14 07:11:41,977 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 66 remaining) [2022-12-14 07:11:41,977 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 66 remaining) [2022-12-14 07:11:41,983 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 66 remaining) [2022-12-14 07:11:41,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 66 remaining) [2022-12-14 07:11:41,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 66 remaining) [2022-12-14 07:11:41,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 66 remaining) [2022-12-14 07:11:41,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 66 remaining) [2022-12-14 07:11:41,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 66 remaining) [2022-12-14 07:11:41,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 66 remaining) [2022-12-14 07:11:41,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 66 remaining) [2022-12-14 07:11:41,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 66 remaining) [2022-12-14 07:11:41,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 66 remaining) [2022-12-14 07:11:41,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 66 remaining) [2022-12-14 07:11:41,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 66 remaining) [2022-12-14 07:11:41,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 66 remaining) [2022-12-14 07:11:41,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 66 remaining) [2022-12-14 07:11:41,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 66 remaining) [2022-12-14 07:11:41,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 66 remaining) [2022-12-14 07:11:41,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (10 of 66 remaining) [2022-12-14 07:11:41,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 66 remaining) [2022-12-14 07:11:41,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 66 remaining) [2022-12-14 07:11:41,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 66 remaining) [2022-12-14 07:11:41,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 66 remaining) [2022-12-14 07:11:41,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (5 of 66 remaining) [2022-12-14 07:11:41,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30ASSERT_VIOLATIONMEMORY_LEAK (4 of 66 remaining) [2022-12-14 07:11:41,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 66 remaining) [2022-12-14 07:11:41,986 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 66 remaining) [2022-12-14 07:11:41,986 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 66 remaining) [2022-12-14 07:11:41,986 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 66 remaining) [2022-12-14 07:11:41,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 07:11:41,987 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:11:41,989 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-14 07:11:41,989 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-14 07:11:42,037 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 07:11:42,040 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 07:11:42,040 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 237 places, 245 transitions, 502 flow [2022-12-14 07:11:42,041 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 237 places, 245 transitions, 502 flow [2022-12-14 07:11:42,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 245 transitions, 502 flow [2022-12-14 07:11:42,081 INFO L130 PetriNetUnfolder]: 15/279 cut-off events. [2022-12-14 07:11:42,082 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-14 07:11:42,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289 conditions, 279 events. 15/279 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 794 event pairs, 0 based on Foata normal form. 0/190 useless extension candidates. Maximal degree in co-relation 218. Up to 6 conditions per place. [2022-12-14 07:11:42,093 INFO L119 LiptonReduction]: Number of co-enabled transitions 27800 [2022-12-14 07:11:50,553 INFO L134 LiptonReduction]: Checked pairs total: 71855 [2022-12-14 07:11:50,554 INFO L136 LiptonReduction]: Total number of compositions: 299 [2022-12-14 07:11:50,554 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 115 places, 120 transitions, 252 flow [2022-12-14 07:11:50,966 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 23354 states, 18105 states have (on average 3.9086440209886772) internal successors, (70766), 23353 states have internal predecessors, (70766), 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) [2022-12-14 07:11:50,967 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:11:50,967 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@49527291, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:11:50,967 INFO L358 AbstractCegarLoop]: Starting to check reachability of 97 error locations. [2022-12-14 07:11:50,995 INFO L276 IsEmpty]: Start isEmpty. Operand has 23354 states, 18105 states have (on average 3.9086440209886772) internal successors, (70766), 23353 states have internal predecessors, (70766), 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) [2022-12-14 07:11:50,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 07:11:50,996 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:11:50,996 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 07:11:50,996 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2022-12-14 07:11:50,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:11:50,996 INFO L85 PathProgramCache]: Analyzing trace with hash 51537, now seen corresponding path program 1 times [2022-12-14 07:11:50,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:11:50,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297507663] [2022-12-14 07:11:50,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:11:50,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:11:51,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:11:51,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:11:51,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:11:51,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297507663] [2022-12-14 07:11:51,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297507663] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:11:51,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:11:51,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:11:51,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719805274] [2022-12-14 07:11:51,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:11:51,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:11:51,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:11:51,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:11:51,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:11:51,049 INFO L87 Difference]: Start difference. First operand has 23354 states, 18105 states have (on average 3.9086440209886772) internal successors, (70766), 23353 states have internal predecessors, (70766), 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, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-12-14 07:11:51,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:11:51,331 INFO L93 Difference]: Finished difference Result 8176 states and 24337 transitions. [2022-12-14 07:11:51,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:11:51,332 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-12-14 07:11:51,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:11:51,397 INFO L225 Difference]: With dead ends: 8176 [2022-12-14 07:11:51,397 INFO L226 Difference]: Without dead ends: 8176 [2022-12-14 07:11:51,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:11:51,398 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 86 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:11:51,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 15 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:11:51,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8176 states. [2022-12-14 07:11:51,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8176 to 8176. [2022-12-14 07:11:51,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8176 states, 7509 states have (on average 3.2410440804368092) internal successors, (24337), 8175 states have internal predecessors, (24337), 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) [2022-12-14 07:11:51,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8176 states to 8176 states and 24337 transitions. [2022-12-14 07:11:51,744 INFO L78 Accepts]: Start accepts. Automaton has 8176 states and 24337 transitions. Word has length 2 [2022-12-14 07:11:51,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:11:51,744 INFO L495 AbstractCegarLoop]: Abstraction has 8176 states and 24337 transitions. [2022-12-14 07:11:51,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-12-14 07:11:51,744 INFO L276 IsEmpty]: Start isEmpty. Operand 8176 states and 24337 transitions. [2022-12-14 07:11:51,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 07:11:51,744 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:11:51,745 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 07:11:51,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 07:11:51,745 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2022-12-14 07:11:51,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:11:51,745 INFO L85 PathProgramCache]: Analyzing trace with hash 51535, now seen corresponding path program 1 times [2022-12-14 07:11:51,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:11:51,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464525610] [2022-12-14 07:11:51,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:11:51,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:11:51,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:11:51,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:11:51,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:11:51,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464525610] [2022-12-14 07:11:51,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464525610] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:11:51,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:11:51,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:11:51,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434547677] [2022-12-14 07:11:51,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:11:51,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:11:51,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:11:51,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:11:51,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:11:51,785 INFO L87 Difference]: Start difference. First operand 8176 states and 24337 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-12-14 07:11:51,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:11:51,952 INFO L93 Difference]: Finished difference Result 6807 states and 20046 transitions. [2022-12-14 07:11:51,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:11:51,953 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-12-14 07:11:51,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:11:51,992 INFO L225 Difference]: With dead ends: 6807 [2022-12-14 07:11:51,993 INFO L226 Difference]: Without dead ends: 6807 [2022-12-14 07:11:51,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:11:51,993 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 85 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:11:51,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 15 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:11:52,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6807 states. [2022-12-14 07:11:52,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6807 to 6807. [2022-12-14 07:11:52,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6807 states, 6483 states have (on average 3.092086996760759) internal successors, (20046), 6806 states have internal predecessors, (20046), 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) [2022-12-14 07:11:52,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6807 states to 6807 states and 20046 transitions. [2022-12-14 07:11:52,153 INFO L78 Accepts]: Start accepts. Automaton has 6807 states and 20046 transitions. Word has length 2 [2022-12-14 07:11:52,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:11:52,153 INFO L495 AbstractCegarLoop]: Abstraction has 6807 states and 20046 transitions. [2022-12-14 07:11:52,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-12-14 07:11:52,153 INFO L276 IsEmpty]: Start isEmpty. Operand 6807 states and 20046 transitions. [2022-12-14 07:11:52,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 07:11:52,153 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:11:52,154 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 07:11:52,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 07:11:52,154 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2022-12-14 07:11:52,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:11:52,154 INFO L85 PathProgramCache]: Analyzing trace with hash 49567749, now seen corresponding path program 1 times [2022-12-14 07:11:52,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:11:52,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462146067] [2022-12-14 07:11:52,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:11:52,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:11:52,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:11:52,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:11:52,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:11:52,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462146067] [2022-12-14 07:11:52,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462146067] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:11:52,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:11:52,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:11:52,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717583575] [2022-12-14 07:11:52,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:11:52,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:11:52,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:11:52,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:11:52,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:11:52,209 INFO L87 Difference]: Start difference. First operand 6807 states and 20046 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-12-14 07:11:52,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:11:52,387 INFO L93 Difference]: Finished difference Result 6089 states and 17982 transitions. [2022-12-14 07:11:52,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:11:52,388 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2022-12-14 07:11:52,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:11:52,414 INFO L225 Difference]: With dead ends: 6089 [2022-12-14 07:11:52,414 INFO L226 Difference]: Without dead ends: 6089 [2022-12-14 07:11:52,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:11:52,415 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 160 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:11:52,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 15 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:11:52,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6089 states. [2022-12-14 07:11:52,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6089 to 6089. [2022-12-14 07:11:52,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6089 states, 5833 states have (on average 3.082804731698954) internal successors, (17982), 6088 states have internal predecessors, (17982), 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) [2022-12-14 07:11:52,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6089 states to 6089 states and 17982 transitions. [2022-12-14 07:11:52,583 INFO L78 Accepts]: Start accepts. Automaton has 6089 states and 17982 transitions. Word has length 4 [2022-12-14 07:11:52,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:11:52,583 INFO L495 AbstractCegarLoop]: Abstraction has 6089 states and 17982 transitions. [2022-12-14 07:11:52,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-12-14 07:11:52,583 INFO L276 IsEmpty]: Start isEmpty. Operand 6089 states and 17982 transitions. [2022-12-14 07:11:52,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 07:11:52,584 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:11:52,584 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 07:11:52,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 07:11:52,584 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2022-12-14 07:11:52,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:11:52,584 INFO L85 PathProgramCache]: Analyzing trace with hash 49567750, now seen corresponding path program 1 times [2022-12-14 07:11:52,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:11:52,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083253569] [2022-12-14 07:11:52,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:11:52,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:11:52,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:11:52,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:11:52,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:11:52,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083253569] [2022-12-14 07:11:52,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083253569] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:11:52,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:11:52,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:11:52,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54786174] [2022-12-14 07:11:52,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:11:52,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:11:52,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:11:52,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:11:52,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:11:52,664 INFO L87 Difference]: Start difference. First operand 6089 states and 17982 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-12-14 07:11:52,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:11:52,811 INFO L93 Difference]: Finished difference Result 5411 states and 16030 transitions. [2022-12-14 07:11:52,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:11:52,811 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2022-12-14 07:11:52,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:11:52,832 INFO L225 Difference]: With dead ends: 5411 [2022-12-14 07:11:52,832 INFO L226 Difference]: Without dead ends: 5411 [2022-12-14 07:11:52,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:11:52,833 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 77 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:11:52,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 15 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:11:52,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5411 states. [2022-12-14 07:11:52,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5411 to 5411. [2022-12-14 07:11:52,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5411 states, 5215 states have (on average 3.0738255033557045) internal successors, (16030), 5410 states have internal predecessors, (16030), 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) [2022-12-14 07:11:52,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5411 states to 5411 states and 16030 transitions. [2022-12-14 07:11:52,933 INFO L78 Accepts]: Start accepts. Automaton has 5411 states and 16030 transitions. Word has length 4 [2022-12-14 07:11:52,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:11:52,933 INFO L495 AbstractCegarLoop]: Abstraction has 5411 states and 16030 transitions. [2022-12-14 07:11:52,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-12-14 07:11:52,933 INFO L276 IsEmpty]: Start isEmpty. Operand 5411 states and 16030 transitions. [2022-12-14 07:11:52,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 07:11:52,933 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:11:52,934 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:11:52,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 07:11:52,934 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2022-12-14 07:11:52,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:11:52,934 INFO L85 PathProgramCache]: Analyzing trace with hash -794368913, now seen corresponding path program 1 times [2022-12-14 07:11:52,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:11:52,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992757391] [2022-12-14 07:11:52,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:11:52,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:11:52,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:11:52,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:11:52,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:11:52,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992757391] [2022-12-14 07:11:52,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992757391] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:11:52,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:11:52,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:11:52,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436915068] [2022-12-14 07:11:52,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:11:52,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:11:52,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:11:52,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:11:52,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:11:52,953 INFO L87 Difference]: Start difference. First operand 5411 states and 16030 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-12-14 07:11:53,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:11:53,112 INFO L93 Difference]: Finished difference Result 6241 states and 18385 transitions. [2022-12-14 07:11:53,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:11:53,112 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2022-12-14 07:11:53,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:11:53,132 INFO L225 Difference]: With dead ends: 6241 [2022-12-14 07:11:53,133 INFO L226 Difference]: Without dead ends: 6241 [2022-12-14 07:11:53,133 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 [2022-12-14 07:11:53,133 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 71 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:11:53,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 29 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:11:53,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6241 states. [2022-12-14 07:11:53,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6241 to 5681. [2022-12-14 07:11:53,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5681 states, 5471 states have (on average 3.0665326265764943) internal successors, (16777), 5680 states have internal predecessors, (16777), 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) [2022-12-14 07:11:53,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5681 states to 5681 states and 16777 transitions. [2022-12-14 07:11:53,263 INFO L78 Accepts]: Start accepts. Automaton has 5681 states and 16777 transitions. Word has length 7 [2022-12-14 07:11:53,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:11:53,263 INFO L495 AbstractCegarLoop]: Abstraction has 5681 states and 16777 transitions. [2022-12-14 07:11:53,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-12-14 07:11:53,264 INFO L276 IsEmpty]: Start isEmpty. Operand 5681 states and 16777 transitions. [2022-12-14 07:11:53,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 07:11:53,264 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:11:53,264 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:11:53,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 07:11:53,264 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2022-12-14 07:11:53,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:11:53,264 INFO L85 PathProgramCache]: Analyzing trace with hash -645533535, now seen corresponding path program 1 times [2022-12-14 07:11:53,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:11:53,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776551483] [2022-12-14 07:11:53,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:11:53,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:11:53,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:11:53,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:11:53,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:11:53,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776551483] [2022-12-14 07:11:53,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776551483] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:11:53,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:11:53,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:11:53,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930108329] [2022-12-14 07:11:53,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:11:53,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:11:53,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:11:53,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:11:53,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:11:53,334 INFO L87 Difference]: Start difference. First operand 5681 states and 16777 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2022-12-14 07:11:53,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:11:53,429 INFO L93 Difference]: Finished difference Result 4111 states and 12247 transitions. [2022-12-14 07:11:53,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:11:53,430 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 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 [2022-12-14 07:11:53,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:11:53,440 INFO L225 Difference]: With dead ends: 4111 [2022-12-14 07:11:53,441 INFO L226 Difference]: Without dead ends: 4111 [2022-12-14 07:11:53,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:11:53,441 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 127 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:11:53,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 15 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:11:53,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4111 states. [2022-12-14 07:11:53,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4111 to 4111. [2022-12-14 07:11:53,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4111 states, 4021 states have (on average 3.0457597612534197) internal successors, (12247), 4110 states have internal predecessors, (12247), 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) [2022-12-14 07:11:53,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4111 states to 4111 states and 12247 transitions. [2022-12-14 07:11:53,509 INFO L78 Accepts]: Start accepts. Automaton has 4111 states and 12247 transitions. Word has length 9 [2022-12-14 07:11:53,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:11:53,509 INFO L495 AbstractCegarLoop]: Abstraction has 4111 states and 12247 transitions. [2022-12-14 07:11:53,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2022-12-14 07:11:53,509 INFO L276 IsEmpty]: Start isEmpty. Operand 4111 states and 12247 transitions. [2022-12-14 07:11:53,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 07:11:53,509 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:11:53,509 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:11:53,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 07:11:53,510 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2022-12-14 07:11:53,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:11:53,510 INFO L85 PathProgramCache]: Analyzing trace with hash -645533534, now seen corresponding path program 1 times [2022-12-14 07:11:53,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:11:53,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713601923] [2022-12-14 07:11:53,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:11:53,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:11:53,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:11:53,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:11:53,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:11:53,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713601923] [2022-12-14 07:11:53,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713601923] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:11:53,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:11:53,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:11:53,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511678208] [2022-12-14 07:11:53,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:11:53,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:11:53,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:11:53,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:11:53,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:11:53,631 INFO L87 Difference]: Start difference. First operand 4111 states and 12247 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2022-12-14 07:11:53,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:11:53,701 INFO L93 Difference]: Finished difference Result 2791 states and 8417 transitions. [2022-12-14 07:11:53,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:11:53,702 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 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 [2022-12-14 07:11:53,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:11:53,708 INFO L225 Difference]: With dead ends: 2791 [2022-12-14 07:11:53,708 INFO L226 Difference]: Without dead ends: 2791 [2022-12-14 07:11:53,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:11:53,709 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 107 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:11:53,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 15 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:11:53,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2022-12-14 07:11:53,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 2791. [2022-12-14 07:11:53,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2771 states have (on average 3.037531577047997) internal successors, (8417), 2790 states have internal predecessors, (8417), 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) [2022-12-14 07:11:53,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 8417 transitions. [2022-12-14 07:11:53,753 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 8417 transitions. Word has length 9 [2022-12-14 07:11:53,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:11:53,753 INFO L495 AbstractCegarLoop]: Abstraction has 2791 states and 8417 transitions. [2022-12-14 07:11:53,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2022-12-14 07:11:53,753 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 8417 transitions. [2022-12-14 07:11:53,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 07:11:53,754 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:11:53,754 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-14 07:11:53,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 07:11:53,754 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2022-12-14 07:11:53,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:11:53,755 INFO L85 PathProgramCache]: Analyzing trace with hash 2034710601, now seen corresponding path program 1 times [2022-12-14 07:11:53,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:11:53,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199567702] [2022-12-14 07:11:53,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:11:53,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:11:53,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 07:11:53,761 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 07:11:53,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 07:11:53,768 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 07:11:53,768 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 07:11:53,768 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (96 of 97 remaining) [2022-12-14 07:11:53,768 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (95 of 97 remaining) [2022-12-14 07:11:53,768 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (94 of 97 remaining) [2022-12-14 07:11:53,768 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (93 of 97 remaining) [2022-12-14 07:11:53,768 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (92 of 97 remaining) [2022-12-14 07:11:53,768 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (91 of 97 remaining) [2022-12-14 07:11:53,768 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (90 of 97 remaining) [2022-12-14 07:11:53,768 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (89 of 97 remaining) [2022-12-14 07:11:53,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (88 of 97 remaining) [2022-12-14 07:11:53,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (87 of 97 remaining) [2022-12-14 07:11:53,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (86 of 97 remaining) [2022-12-14 07:11:53,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (85 of 97 remaining) [2022-12-14 07:11:53,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (84 of 97 remaining) [2022-12-14 07:11:53,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (83 of 97 remaining) [2022-12-14 07:11:53,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (82 of 97 remaining) [2022-12-14 07:11:53,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (81 of 97 remaining) [2022-12-14 07:11:53,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 97 remaining) [2022-12-14 07:11:53,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 97 remaining) [2022-12-14 07:11:53,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 97 remaining) [2022-12-14 07:11:53,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 97 remaining) [2022-12-14 07:11:53,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 97 remaining) [2022-12-14 07:11:53,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (75 of 97 remaining) [2022-12-14 07:11:53,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 97 remaining) [2022-12-14 07:11:53,770 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 97 remaining) [2022-12-14 07:11:53,770 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 97 remaining) [2022-12-14 07:11:53,770 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 97 remaining) [2022-12-14 07:11:53,770 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (70 of 97 remaining) [2022-12-14 07:11:53,770 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30ASSERT_VIOLATIONMEMORY_LEAK (69 of 97 remaining) [2022-12-14 07:11:53,770 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 97 remaining) [2022-12-14 07:11:53,770 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 97 remaining) [2022-12-14 07:11:53,770 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 97 remaining) [2022-12-14 07:11:53,770 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 97 remaining) [2022-12-14 07:11:53,770 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 97 remaining) [2022-12-14 07:11:53,770 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 97 remaining) [2022-12-14 07:11:53,770 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (62 of 97 remaining) [2022-12-14 07:11:53,770 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 97 remaining) [2022-12-14 07:11:53,770 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 97 remaining) [2022-12-14 07:11:53,770 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 97 remaining) [2022-12-14 07:11:53,771 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 97 remaining) [2022-12-14 07:11:53,771 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 97 remaining) [2022-12-14 07:11:53,771 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 97 remaining) [2022-12-14 07:11:53,771 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 97 remaining) [2022-12-14 07:11:53,771 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 97 remaining) [2022-12-14 07:11:53,771 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 97 remaining) [2022-12-14 07:11:53,771 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 97 remaining) [2022-12-14 07:11:53,771 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 97 remaining) [2022-12-14 07:11:53,771 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 97 remaining) [2022-12-14 07:11:53,771 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 97 remaining) [2022-12-14 07:11:53,771 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 97 remaining) [2022-12-14 07:11:53,771 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 97 remaining) [2022-12-14 07:11:53,771 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 97 remaining) [2022-12-14 07:11:53,771 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 97 remaining) [2022-12-14 07:11:53,771 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 97 remaining) [2022-12-14 07:11:53,772 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 97 remaining) [2022-12-14 07:11:53,772 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 97 remaining) [2022-12-14 07:11:53,772 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (41 of 97 remaining) [2022-12-14 07:11:53,772 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 97 remaining) [2022-12-14 07:11:53,772 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 97 remaining) [2022-12-14 07:11:53,772 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 97 remaining) [2022-12-14 07:11:53,772 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 97 remaining) [2022-12-14 07:11:53,772 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (36 of 97 remaining) [2022-12-14 07:11:53,772 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30ASSERT_VIOLATIONMEMORY_LEAK (35 of 97 remaining) [2022-12-14 07:11:53,772 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 97 remaining) [2022-12-14 07:11:53,772 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 97 remaining) [2022-12-14 07:11:53,772 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 97 remaining) [2022-12-14 07:11:53,772 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 97 remaining) [2022-12-14 07:11:53,772 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 97 remaining) [2022-12-14 07:11:53,772 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 97 remaining) [2022-12-14 07:11:53,773 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 97 remaining) [2022-12-14 07:11:53,773 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 97 remaining) [2022-12-14 07:11:53,773 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 97 remaining) [2022-12-14 07:11:53,773 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 97 remaining) [2022-12-14 07:11:53,773 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 97 remaining) [2022-12-14 07:11:53,773 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 97 remaining) [2022-12-14 07:11:53,773 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 97 remaining) [2022-12-14 07:11:53,773 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 97 remaining) [2022-12-14 07:11:53,773 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 97 remaining) [2022-12-14 07:11:53,773 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 97 remaining) [2022-12-14 07:11:53,773 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 97 remaining) [2022-12-14 07:11:53,773 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 97 remaining) [2022-12-14 07:11:53,773 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 97 remaining) [2022-12-14 07:11:53,773 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 97 remaining) [2022-12-14 07:11:53,773 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 97 remaining) [2022-12-14 07:11:53,774 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 97 remaining) [2022-12-14 07:11:53,774 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 97 remaining) [2022-12-14 07:11:53,774 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 97 remaining) [2022-12-14 07:11:53,774 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (10 of 97 remaining) [2022-12-14 07:11:53,774 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 97 remaining) [2022-12-14 07:11:53,774 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 97 remaining) [2022-12-14 07:11:53,774 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 97 remaining) [2022-12-14 07:11:53,774 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 97 remaining) [2022-12-14 07:11:53,774 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (5 of 97 remaining) [2022-12-14 07:11:53,774 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30ASSERT_VIOLATIONMEMORY_LEAK (4 of 97 remaining) [2022-12-14 07:11:53,774 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 97 remaining) [2022-12-14 07:11:53,774 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 97 remaining) [2022-12-14 07:11:53,774 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 97 remaining) [2022-12-14 07:11:53,774 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 97 remaining) [2022-12-14 07:11:53,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 07:11:53,775 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:11:53,775 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-14 07:11:53,775 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-14 07:11:53,822 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 07:11:53,824 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 07:11:53,825 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 334 places, 346 transitions, 713 flow [2022-12-14 07:11:53,825 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 334 places, 346 transitions, 713 flow [2022-12-14 07:11:53,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 334 places, 346 transitions, 713 flow [2022-12-14 07:11:53,882 INFO L130 PetriNetUnfolder]: 22/398 cut-off events. [2022-12-14 07:11:53,882 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-14 07:11:53,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 398 events. 22/398 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1448 event pairs, 0 based on Foata normal form. 0/267 useless extension candidates. Maximal degree in co-relation 318. Up to 8 conditions per place. [2022-12-14 07:11:53,902 INFO L119 LiptonReduction]: Number of co-enabled transitions 72000 [2022-12-14 07:12:05,831 INFO L134 LiptonReduction]: Checked pairs total: 194308 [2022-12-14 07:12:05,831 INFO L136 LiptonReduction]: Total number of compositions: 426 [2022-12-14 07:12:05,831 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 168 places, 176 transitions, 373 flow [2022-12-14 07:12:26,527 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1191669 states, 1023605 states have (on average 4.782619272082493) internal successors, (4895513), 1191668 states have internal predecessors, (4895513), 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) [2022-12-14 07:12:26,529 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:12:26,529 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@49527291, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:12:26,529 INFO L358 AbstractCegarLoop]: Starting to check reachability of 128 error locations. [2022-12-14 07:12:27,941 INFO L276 IsEmpty]: Start isEmpty. Operand has 1191669 states, 1023605 states have (on average 4.782619272082493) internal successors, (4895513), 1191668 states have internal predecessors, (4895513), 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) [2022-12-14 07:12:27,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 07:12:27,942 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:12:27,942 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 07:12:27,942 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 125 more)] === [2022-12-14 07:12:27,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:12:27,944 INFO L85 PathProgramCache]: Analyzing trace with hash 79642, now seen corresponding path program 1 times [2022-12-14 07:12:27,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:12:27,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407110163] [2022-12-14 07:12:27,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:12:27,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:12:27,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:12:27,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:12:27,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:12:27,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407110163] [2022-12-14 07:12:27,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407110163] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:12:27,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:12:27,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:12:27,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605358104] [2022-12-14 07:12:27,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:12:27,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:12:27,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:12:27,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:12:27,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:12:30,998 INFO L87 Difference]: Start difference. First operand has 1191669 states, 1023605 states have (on average 4.782619272082493) internal successors, (4895513), 1191668 states have internal predecessors, (4895513), 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, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-12-14 07:12:34,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:12:34,957 INFO L93 Difference]: Finished difference Result 302738 states and 1228160 transitions. [2022-12-14 07:12:34,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:12:34,958 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-12-14 07:12:34,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:12:36,923 INFO L225 Difference]: With dead ends: 302738 [2022-12-14 07:12:36,924 INFO L226 Difference]: Without dead ends: 302738 [2022-12-14 07:12:36,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:12:36,925 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 127 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:12:36,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 23 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:12:37,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302738 states. [2022-12-14 07:12:44,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302738 to 302738. [2022-12-14 07:12:44,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302738 states, 290731 states have (on average 4.2243861163756184) internal successors, (1228160), 302737 states have internal predecessors, (1228160), 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) [2022-12-14 07:12:46,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302738 states to 302738 states and 1228160 transitions. [2022-12-14 07:12:46,742 INFO L78 Accepts]: Start accepts. Automaton has 302738 states and 1228160 transitions. Word has length 2 [2022-12-14 07:12:46,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:12:46,742 INFO L495 AbstractCegarLoop]: Abstraction has 302738 states and 1228160 transitions. [2022-12-14 07:12:46,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-12-14 07:12:46,742 INFO L276 IsEmpty]: Start isEmpty. Operand 302738 states and 1228160 transitions. [2022-12-14 07:12:46,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 07:12:46,742 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:12:46,742 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 07:12:46,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 07:12:46,742 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 125 more)] === [2022-12-14 07:12:46,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:12:46,743 INFO L85 PathProgramCache]: Analyzing trace with hash 79643, now seen corresponding path program 1 times [2022-12-14 07:12:46,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:12:46,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536593930] [2022-12-14 07:12:46,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:12:46,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:12:46,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:12:46,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:12:46,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:12:46,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536593930] [2022-12-14 07:12:46,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536593930] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:12:46,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:12:46,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:12:46,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637370085] [2022-12-14 07:12:46,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:12:46,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:12:46,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:12:46,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:12:46,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:12:46,757 INFO L87 Difference]: Start difference. First operand 302738 states and 1228160 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-12-14 07:12:49,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:12:49,306 INFO L93 Difference]: Finished difference Result 252047 states and 1014518 transitions. [2022-12-14 07:12:49,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:12:49,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-12-14 07:12:49,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:12:50,681 INFO L225 Difference]: With dead ends: 252047 [2022-12-14 07:12:50,681 INFO L226 Difference]: Without dead ends: 252047 [2022-12-14 07:12:50,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:12:50,682 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 126 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:12:50,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 23 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:12:51,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252047 states. [2022-12-14 07:12:56,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252047 to 252047. [2022-12-14 07:12:57,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252047 states, 246215 states have (on average 4.120455699287208) internal successors, (1014518), 252046 states have internal predecessors, (1014518), 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) [2022-12-14 07:12:58,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252047 states to 252047 states and 1014518 transitions. [2022-12-14 07:12:58,542 INFO L78 Accepts]: Start accepts. Automaton has 252047 states and 1014518 transitions. Word has length 2 [2022-12-14 07:12:58,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:12:58,542 INFO L495 AbstractCegarLoop]: Abstraction has 252047 states and 1014518 transitions. [2022-12-14 07:12:58,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-12-14 07:12:58,543 INFO L276 IsEmpty]: Start isEmpty. Operand 252047 states and 1014518 transitions. [2022-12-14 07:12:58,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 07:12:58,543 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:12:58,543 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 07:12:58,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 07:12:58,543 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 125 more)] === [2022-12-14 07:12:58,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:12:58,544 INFO L85 PathProgramCache]: Analyzing trace with hash 76600546, now seen corresponding path program 1 times [2022-12-14 07:12:58,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:12:58,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053852459] [2022-12-14 07:12:58,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:12:58,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:12:58,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:12:58,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:12:58,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:12:58,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053852459] [2022-12-14 07:12:58,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053852459] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:12:58,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:12:58,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:12:58,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175572000] [2022-12-14 07:12:58,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:12:58,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:12:58,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:12:58,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:12:58,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:12:58,599 INFO L87 Difference]: Start difference. First operand 252047 states and 1014518 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-12-14 07:13:00,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:13:00,656 INFO L93 Difference]: Finished difference Result 213293 states and 861260 transitions. [2022-12-14 07:13:00,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:13:00,657 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2022-12-14 07:13:00,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:13:02,086 INFO L225 Difference]: With dead ends: 213293 [2022-12-14 07:13:02,086 INFO L226 Difference]: Without dead ends: 213293 [2022-12-14 07:13:02,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:13:02,087 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 238 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:13:02,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 23 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:13:02,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213293 states. [2022-12-14 07:13:07,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213293 to 213293. [2022-12-14 07:13:07,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213293 states, 209197 states have (on average 4.1169806450379305) internal successors, (861260), 213292 states have internal predecessors, (861260), 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) [2022-12-14 07:13:08,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213293 states to 213293 states and 861260 transitions. [2022-12-14 07:13:08,831 INFO L78 Accepts]: Start accepts. Automaton has 213293 states and 861260 transitions. Word has length 4 [2022-12-14 07:13:08,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:13:08,831 INFO L495 AbstractCegarLoop]: Abstraction has 213293 states and 861260 transitions. [2022-12-14 07:13:08,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-12-14 07:13:08,831 INFO L276 IsEmpty]: Start isEmpty. Operand 213293 states and 861260 transitions. [2022-12-14 07:13:08,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 07:13:08,831 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:13:08,831 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 07:13:08,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-14 07:13:08,832 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 125 more)] === [2022-12-14 07:13:08,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:13:08,832 INFO L85 PathProgramCache]: Analyzing trace with hash 76600547, now seen corresponding path program 1 times [2022-12-14 07:13:08,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:13:08,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657333155] [2022-12-14 07:13:08,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:13:08,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:13:08,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:13:08,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:13:08,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:13:08,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657333155] [2022-12-14 07:13:08,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657333155] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:13:08,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:13:08,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:13:08,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495889206] [2022-12-14 07:13:08,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:13:08,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:13:08,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:13:08,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:13:08,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:13:08,882 INFO L87 Difference]: Start difference. First operand 213293 states and 861260 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-12-14 07:13:10,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:13:10,388 INFO L93 Difference]: Finished difference Result 178731 states and 724266 transitions. [2022-12-14 07:13:10,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:13:10,389 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2022-12-14 07:13:10,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:13:11,338 INFO L225 Difference]: With dead ends: 178731 [2022-12-14 07:13:11,338 INFO L226 Difference]: Without dead ends: 178731 [2022-12-14 07:13:11,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:13:11,339 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 226 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:13:11,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 23 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:13:11,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178731 states. [2022-12-14 07:13:15,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178731 to 178731. [2022-12-14 07:13:15,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178731 states, 175987 states have (on average 4.11545170950127) internal successors, (724266), 178730 states have internal predecessors, (724266), 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) [2022-12-14 07:13:16,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178731 states to 178731 states and 724266 transitions. [2022-12-14 07:13:16,680 INFO L78 Accepts]: Start accepts. Automaton has 178731 states and 724266 transitions. Word has length 4 [2022-12-14 07:13:16,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:13:16,680 INFO L495 AbstractCegarLoop]: Abstraction has 178731 states and 724266 transitions. [2022-12-14 07:13:16,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-12-14 07:13:16,680 INFO L276 IsEmpty]: Start isEmpty. Operand 178731 states and 724266 transitions. [2022-12-14 07:13:16,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 07:13:16,681 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:13:16,681 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:13:16,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 07:13:16,681 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 125 more)] === [2022-12-14 07:13:16,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:13:16,682 INFO L85 PathProgramCache]: Analyzing trace with hash -132617908, now seen corresponding path program 1 times [2022-12-14 07:13:16,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:13:16,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913076698] [2022-12-14 07:13:16,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:13:16,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:13:16,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:13:16,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:13:16,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:13:16,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913076698] [2022-12-14 07:13:16,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913076698] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:13:16,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:13:16,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:13:16,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192336635] [2022-12-14 07:13:16,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:13:16,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:13:16,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:13:16,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:13:16,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:13:16,712 INFO L87 Difference]: Start difference. First operand 178731 states and 724266 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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)