./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6bd9129-f387-4959-a69d-d717444b307d/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6bd9129-f387-4959-a69d-d717444b307d/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_e6bd9129-f387-4959-a69d-d717444b307d/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6bd9129-f387-4959-a69d-d717444b307d/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6bd9129-f387-4959-a69d-d717444b307d/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_e6bd9129-f387-4959-a69d-d717444b307d/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 a8bcba962b15df67a0e136eef2e702f216cc120b7626a7b8dc8877f6ecaf3765 --- 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 13:48:13,357 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:48:13,359 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:48:13,371 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:48:13,372 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:48:13,372 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:48:13,373 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:48:13,374 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:48:13,375 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:48:13,376 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:48:13,377 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:48:13,377 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:48:13,378 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:48:13,378 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:48:13,379 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:48:13,380 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:48:13,381 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:48:13,381 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:48:13,382 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:48:13,384 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:48:13,384 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:48:13,385 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:48:13,386 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:48:13,387 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:48:13,389 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:48:13,389 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:48:13,390 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:48:13,390 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:48:13,391 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:48:13,391 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:48:13,392 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:48:13,392 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:48:13,393 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:48:13,397 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:48:13,399 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:48:13,399 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:48:13,400 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:48:13,400 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:48:13,400 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:48:13,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:48:13,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:48:13,402 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6bd9129-f387-4959-a69d-d717444b307d/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 13:48:13,423 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:48:13,423 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:48:13,423 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:48:13,423 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:48:13,424 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:48:13,424 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:48:13,424 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:48:13,424 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:48:13,424 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:48:13,424 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 13:48:13,424 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:48:13,424 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:48:13,424 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 13:48:13,425 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 13:48:13,425 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:48:13,425 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 13:48:13,425 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 13:48:13,425 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 13:48:13,425 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 13:48:13,425 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 13:48:13,426 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:48:13,426 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:48:13,426 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 13:48:13,426 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:48:13,426 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:48:13,426 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:48:13,426 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 13:48:13,426 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 13:48:13,431 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 13:48:13,432 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:48:13,432 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 13:48:13,432 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:48:13,432 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:48:13,432 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:48:13,432 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:48:13,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:48:13,432 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:48:13,432 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 13:48:13,432 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:48:13,433 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 13:48:13,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 13:48:13,433 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:48:13,433 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_e6bd9129-f387-4959-a69d-d717444b307d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6bd9129-f387-4959-a69d-d717444b307d/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8bcba962b15df67a0e136eef2e702f216cc120b7626a7b8dc8877f6ecaf3765 [2022-12-14 13:48:13,583 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:48:13,600 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:48:13,602 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:48:13,603 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:48:13,603 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:48:13,604 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6bd9129-f387-4959-a69d-d717444b307d/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i [2022-12-14 13:48:16,074 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:48:16,260 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:48:16,261 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6bd9129-f387-4959-a69d-d717444b307d/sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i [2022-12-14 13:48:16,271 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6bd9129-f387-4959-a69d-d717444b307d/bin/utaipan-gh47qXpMRh/data/b999b2e2b/cfbc72d8a8784fbabb0840c9037ecbbb/FLAG4cdd0f63e [2022-12-14 13:48:16,638 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6bd9129-f387-4959-a69d-d717444b307d/bin/utaipan-gh47qXpMRh/data/b999b2e2b/cfbc72d8a8784fbabb0840c9037ecbbb [2022-12-14 13:48:16,644 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:48:16,647 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:48:16,649 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:48:16,649 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:48:16,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:48:16,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:48:16" (1/1) ... [2022-12-14 13:48:16,657 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b11f682 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:48:16, skipping insertion in model container [2022-12-14 13:48:16,657 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:48:16" (1/1) ... [2022-12-14 13:48:16,664 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:48:16,687 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:48:16,882 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_e6bd9129-f387-4959-a69d-d717444b307d/sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i[30726,30739] [2022-12-14 13:48:16,888 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:48:16,896 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:48:16,925 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_e6bd9129-f387-4959-a69d-d717444b307d/sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i[30726,30739] [2022-12-14 13:48:16,926 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:48:16,948 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:48:16,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:48:16 WrapperNode [2022-12-14 13:48:16,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:48:16,949 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:48:16,949 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:48:16,950 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:48:16,955 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:48:16" (1/1) ... [2022-12-14 13:48:16,964 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:48:16" (1/1) ... [2022-12-14 13:48:16,980 INFO L138 Inliner]: procedures = 171, calls = 26, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 85 [2022-12-14 13:48:16,980 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:48:16,981 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:48:16,981 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:48:16,981 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:48:16,987 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:48:16" (1/1) ... [2022-12-14 13:48:16,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:48:16" (1/1) ... [2022-12-14 13:48:16,989 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:48:16" (1/1) ... [2022-12-14 13:48:16,990 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:48:16" (1/1) ... [2022-12-14 13:48:16,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:48:16" (1/1) ... [2022-12-14 13:48:16,995 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:48:16" (1/1) ... [2022-12-14 13:48:16,996 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:48:16" (1/1) ... [2022-12-14 13:48:16,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:48:16" (1/1) ... [2022-12-14 13:48:16,999 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:48:16,999 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:48:16,999 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:48:16,999 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:48:17,000 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:48:16" (1/1) ... [2022-12-14 13:48:17,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:48:17,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6bd9129-f387-4959-a69d-d717444b307d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:48:17,023 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6bd9129-f387-4959-a69d-d717444b307d/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:48:17,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6bd9129-f387-4959-a69d-d717444b307d/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:48:17,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 13:48:17,058 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-12-14 13:48:17,058 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-12-14 13:48:17,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 13:48:17,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 13:48:17,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 13:48:17,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 13:48:17,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 13:48:17,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:48:17,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:48:17,060 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 13:48:17,154 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:48:17,156 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:48:17,349 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:48:17,404 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:48:17,404 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 13:48:17,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:48:17 BoogieIcfgContainer [2022-12-14 13:48:17,406 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:48:17,408 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:48:17,408 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:48:17,411 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:48:17,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:48:16" (1/3) ... [2022-12-14 13:48:17,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a07965b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:48:17, skipping insertion in model container [2022-12-14 13:48:17,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:48:16" (2/3) ... [2022-12-14 13:48:17,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a07965b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:48:17, skipping insertion in model container [2022-12-14 13:48:17,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:48:17" (3/3) ... [2022-12-14 13:48:17,413 INFO L112 eAbstractionObserver]: Analyzing ICFG 37_stack_lock_p0_vs_concur.i [2022-12-14 13:48:17,427 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:48:17,427 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2022-12-14 13:48:17,427 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 13:48:17,481 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 13:48:17,505 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 13:48:17,516 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 98 places, 101 transitions, 207 flow [2022-12-14 13:48:17,518 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 98 places, 101 transitions, 207 flow [2022-12-14 13:48:17,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 101 transitions, 207 flow [2022-12-14 13:48:17,557 INFO L130 PetriNetUnfolder]: 7/117 cut-off events. [2022-12-14 13:48:17,557 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-14 13:48:17,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 117 events. 7/117 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 214 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 81. Up to 4 conditions per place. [2022-12-14 13:48:17,565 INFO L119 LiptonReduction]: Number of co-enabled transitions 2394 [2022-12-14 13:48:19,787 INFO L134 LiptonReduction]: Checked pairs total: 4841 [2022-12-14 13:48:19,788 INFO L136 LiptonReduction]: Total number of compositions: 137 [2022-12-14 13:48:19,794 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 37 transitions, 79 flow [2022-12-14 13:48:19,811 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 221 states, 139 states have (on average 3.0) internal successors, (417), 220 states have internal predecessors, (417), 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 13:48:19,824 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:48:19,829 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;@351f1bc7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:48:19,829 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2022-12-14 13:48:19,831 INFO L276 IsEmpty]: Start isEmpty. Operand has 221 states, 139 states have (on average 3.0) internal successors, (417), 220 states have internal predecessors, (417), 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 13:48:19,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 13:48:19,834 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:48:19,835 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 13:48:19,835 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 13:48:19,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:48:19,839 INFO L85 PathProgramCache]: Analyzing trace with hash 16934, now seen corresponding path program 1 times [2022-12-14 13:48:19,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:48:19,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505360821] [2022-12-14 13:48:19,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:48:19,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:48:19,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:48:19,999 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 13:48:20,000 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:48:20,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505360821] [2022-12-14 13:48:20,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505360821] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:48:20,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:48:20,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 13:48:20,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765791436] [2022-12-14 13:48:20,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:48:20,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:48:20,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:48:20,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:48:20,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:48:20,027 INFO L87 Difference]: Start difference. First operand has 221 states, 139 states have (on average 3.0) internal successors, (417), 220 states have internal predecessors, (417), 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 13:48:20,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:48:20,092 INFO L93 Difference]: Finished difference Result 146 states and 272 transitions. [2022-12-14 13:48:20,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:48:20,094 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 13:48:20,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:48:20,101 INFO L225 Difference]: With dead ends: 146 [2022-12-14 13:48:20,101 INFO L226 Difference]: Without dead ends: 146 [2022-12-14 13:48:20,101 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 13:48:20,103 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:48:20,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 5 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:48:20,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-12-14 13:48:20,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 109. [2022-12-14 13:48:20,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 99 states have (on average 2.212121212121212) internal successors, (219), 108 states have internal predecessors, (219), 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 13:48:20,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 219 transitions. [2022-12-14 13:48:20,132 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 219 transitions. Word has length 2 [2022-12-14 13:48:20,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:48:20,133 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 219 transitions. [2022-12-14 13:48:20,133 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 13:48:20,133 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 219 transitions. [2022-12-14 13:48:20,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 13:48:20,133 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:48:20,133 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 13:48:20,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 13:48:20,134 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 13:48:20,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:48:20,134 INFO L85 PathProgramCache]: Analyzing trace with hash 16936, now seen corresponding path program 1 times [2022-12-14 13:48:20,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:48:20,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077944283] [2022-12-14 13:48:20,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:48:20,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:48:20,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:48:20,200 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 13:48:20,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:48:20,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077944283] [2022-12-14 13:48:20,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077944283] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:48:20,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:48:20,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 13:48:20,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025014005] [2022-12-14 13:48:20,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:48:20,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:48:20,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:48:20,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:48:20,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:48:20,203 INFO L87 Difference]: Start difference. First operand 109 states and 219 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 13:48:20,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:48:20,249 INFO L93 Difference]: Finished difference Result 133 states and 256 transitions. [2022-12-14 13:48:20,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:48:20,250 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 13:48:20,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:48:20,251 INFO L225 Difference]: With dead ends: 133 [2022-12-14 13:48:20,251 INFO L226 Difference]: Without dead ends: 133 [2022-12-14 13:48:20,251 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 13:48:20,252 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:48:20,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 9 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:48:20,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-12-14 13:48:20,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 107. [2022-12-14 13:48:20,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 98 states have (on average 2.193877551020408) internal successors, (215), 106 states have internal predecessors, (215), 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 13:48:20,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 215 transitions. [2022-12-14 13:48:20,258 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 215 transitions. Word has length 2 [2022-12-14 13:48:20,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:48:20,258 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 215 transitions. [2022-12-14 13:48:20,258 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 13:48:20,258 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 215 transitions. [2022-12-14 13:48:20,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 13:48:20,259 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:48:20,259 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-12-14 13:48:20,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 13:48:20,259 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 13:48:20,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:48:20,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1528423827, now seen corresponding path program 1 times [2022-12-14 13:48:20,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:48:20,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588708882] [2022-12-14 13:48:20,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:48:20,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:48:20,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 13:48:20,270 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 13:48:20,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 13:48:20,288 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 13:48:20,289 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 13:48:20,289 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (33 of 34 remaining) [2022-12-14 13:48:20,291 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 34 remaining) [2022-12-14 13:48:20,291 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 34 remaining) [2022-12-14 13:48:20,291 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 34 remaining) [2022-12-14 13:48:20,291 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 34 remaining) [2022-12-14 13:48:20,291 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 34 remaining) [2022-12-14 13:48:20,291 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 34 remaining) [2022-12-14 13:48:20,291 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 34 remaining) [2022-12-14 13:48:20,292 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 34 remaining) [2022-12-14 13:48:20,292 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (24 of 34 remaining) [2022-12-14 13:48:20,292 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 34 remaining) [2022-12-14 13:48:20,292 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 34 remaining) [2022-12-14 13:48:20,292 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (21 of 34 remaining) [2022-12-14 13:48:20,292 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (20 of 34 remaining) [2022-12-14 13:48:20,292 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 34 remaining) [2022-12-14 13:48:20,292 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 34 remaining) [2022-12-14 13:48:20,293 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 34 remaining) [2022-12-14 13:48:20,293 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 34 remaining) [2022-12-14 13:48:20,293 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (15 of 34 remaining) [2022-12-14 13:48:20,293 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 34 remaining) [2022-12-14 13:48:20,293 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 34 remaining) [2022-12-14 13:48:20,293 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 34 remaining) [2022-12-14 13:48:20,293 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 34 remaining) [2022-12-14 13:48:20,293 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 34 remaining) [2022-12-14 13:48:20,293 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 34 remaining) [2022-12-14 13:48:20,294 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 34 remaining) [2022-12-14 13:48:20,294 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 34 remaining) [2022-12-14 13:48:20,294 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (6 of 34 remaining) [2022-12-14 13:48:20,294 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 34 remaining) [2022-12-14 13:48:20,294 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 34 remaining) [2022-12-14 13:48:20,294 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (3 of 34 remaining) [2022-12-14 13:48:20,294 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (2 of 34 remaining) [2022-12-14 13:48:20,295 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 34 remaining) [2022-12-14 13:48:20,295 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 34 remaining) [2022-12-14 13:48:20,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 13:48:20,296 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-14 13:48:20,298 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-14 13:48:20,298 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-14 13:48:20,327 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 13:48:20,331 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 13:48:20,332 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 159 places, 165 transitions, 342 flow [2022-12-14 13:48:20,332 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 159 places, 165 transitions, 342 flow [2022-12-14 13:48:20,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 165 transitions, 342 flow [2022-12-14 13:48:20,366 INFO L130 PetriNetUnfolder]: 13/199 cut-off events. [2022-12-14 13:48:20,366 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-14 13:48:20,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 199 events. 13/199 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 605 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 144. Up to 6 conditions per place. [2022-12-14 13:48:20,373 INFO L119 LiptonReduction]: Number of co-enabled transitions 12852 [2022-12-14 13:48:22,439 INFO L134 LiptonReduction]: Checked pairs total: 58125 [2022-12-14 13:48:22,439 INFO L136 LiptonReduction]: Total number of compositions: 131 [2022-12-14 13:48:22,440 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 79 places, 78 transitions, 168 flow [2022-12-14 13:48:22,619 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 9772 states, 8427 states have (on average 3.39124243503026) internal successors, (28578), 9771 states have internal predecessors, (28578), 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 13:48:22,620 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:48:22,621 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;@351f1bc7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:48:22,621 INFO L358 AbstractCegarLoop]: Starting to check reachability of 49 error locations. [2022-12-14 13:48:22,635 INFO L276 IsEmpty]: Start isEmpty. Operand has 9772 states, 8427 states have (on average 3.39124243503026) internal successors, (28578), 9771 states have internal predecessors, (28578), 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 13:48:22,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 13:48:22,636 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:48:22,636 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 13:48:22,636 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2022-12-14 13:48:22,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:48:22,637 INFO L85 PathProgramCache]: Analyzing trace with hash 28613, now seen corresponding path program 1 times [2022-12-14 13:48:22,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:48:22,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478028742] [2022-12-14 13:48:22,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:48:22,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:48:22,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:48:22,665 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 13:48:22,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:48:22,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478028742] [2022-12-14 13:48:22,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478028742] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:48:22,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:48:22,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 13:48:22,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571540228] [2022-12-14 13:48:22,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:48:22,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:48:22,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:48:22,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:48:22,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:48:22,678 INFO L87 Difference]: Start difference. First operand has 9772 states, 8427 states have (on average 3.39124243503026) internal successors, (28578), 9771 states have internal predecessors, (28578), 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 13:48:22,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:48:22,932 INFO L93 Difference]: Finished difference Result 12975 states and 37002 transitions. [2022-12-14 13:48:22,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:48:22,936 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 13:48:22,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:48:23,007 INFO L225 Difference]: With dead ends: 12975 [2022-12-14 13:48:23,007 INFO L226 Difference]: Without dead ends: 12975 [2022-12-14 13:48:23,007 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 13:48:23,008 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 66 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:48:23,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 34 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:48:23,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12975 states. [2022-12-14 13:48:23,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12975 to 10037. [2022-12-14 13:48:23,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10037 states, 9331 states have (on average 3.222805701425356) internal successors, (30072), 10036 states have internal predecessors, (30072), 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 13:48:23,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10037 states to 10037 states and 30072 transitions. [2022-12-14 13:48:23,293 INFO L78 Accepts]: Start accepts. Automaton has 10037 states and 30072 transitions. Word has length 2 [2022-12-14 13:48:23,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:48:23,294 INFO L495 AbstractCegarLoop]: Abstraction has 10037 states and 30072 transitions. [2022-12-14 13:48:23,294 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 13:48:23,294 INFO L276 IsEmpty]: Start isEmpty. Operand 10037 states and 30072 transitions. [2022-12-14 13:48:23,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 13:48:23,294 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:48:23,294 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 13:48:23,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 13:48:23,295 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2022-12-14 13:48:23,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:48:23,295 INFO L85 PathProgramCache]: Analyzing trace with hash 28614, now seen corresponding path program 1 times [2022-12-14 13:48:23,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:48:23,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171268859] [2022-12-14 13:48:23,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:48:23,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:48:23,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:48:23,327 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 13:48:23,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:48:23,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171268859] [2022-12-14 13:48:23,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171268859] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:48:23,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:48:23,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 13:48:23,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493423868] [2022-12-14 13:48:23,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:48:23,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:48:23,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:48:23,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:48:23,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:48:23,329 INFO L87 Difference]: Start difference. First operand 10037 states and 30072 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 13:48:23,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:48:23,499 INFO L93 Difference]: Finished difference Result 9012 states and 26043 transitions. [2022-12-14 13:48:23,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:48:23,500 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 13:48:23,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:48:23,549 INFO L225 Difference]: With dead ends: 9012 [2022-12-14 13:48:23,549 INFO L226 Difference]: Without dead ends: 9012 [2022-12-14 13:48:23,549 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 13:48:23,550 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 69 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:48:23,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 18 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:48:23,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9012 states. [2022-12-14 13:48:23,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9012 to 9012. [2022-12-14 13:48:23,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9012 states, 8547 states have (on average 3.047034047034047) internal successors, (26043), 9011 states have internal predecessors, (26043), 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 13:48:23,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9012 states to 9012 states and 26043 transitions. [2022-12-14 13:48:23,853 INFO L78 Accepts]: Start accepts. Automaton has 9012 states and 26043 transitions. Word has length 2 [2022-12-14 13:48:23,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:48:23,853 INFO L495 AbstractCegarLoop]: Abstraction has 9012 states and 26043 transitions. [2022-12-14 13:48:23,853 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 13:48:23,853 INFO L276 IsEmpty]: Start isEmpty. Operand 9012 states and 26043 transitions. [2022-12-14 13:48:23,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 13:48:23,854 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:48:23,854 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:48:23,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 13:48:23,854 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2022-12-14 13:48:23,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:48:23,855 INFO L85 PathProgramCache]: Analyzing trace with hash -496138086, now seen corresponding path program 1 times [2022-12-14 13:48:23,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:48:23,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290737238] [2022-12-14 13:48:23,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:48:23,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:48:23,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:48:23,907 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 13:48:23,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:48:23,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290737238] [2022-12-14 13:48:23,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290737238] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:48:23,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:48:23,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:48:23,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864874263] [2022-12-14 13:48:23,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:48:23,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:48:23,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:48:23,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:48:23,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:48:23,909 INFO L87 Difference]: Start difference. First operand 9012 states and 26043 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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 13:48:24,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:48:24,060 INFO L93 Difference]: Finished difference Result 12360 states and 35667 transitions. [2022-12-14 13:48:24,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:48:24,061 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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 13:48:24,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:48:24,113 INFO L225 Difference]: With dead ends: 12360 [2022-12-14 13:48:24,113 INFO L226 Difference]: Without dead ends: 12360 [2022-12-14 13:48:24,113 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 13:48:24,114 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 55 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:48:24,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 45 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:48:24,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12360 states. [2022-12-14 13:48:24,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12360 to 10200. [2022-12-14 13:48:24,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10200 states, 9741 states have (on average 3.1810902371419774) internal successors, (30987), 10199 states have internal predecessors, (30987), 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 13:48:24,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10200 states to 10200 states and 30987 transitions. [2022-12-14 13:48:24,484 INFO L78 Accepts]: Start accepts. Automaton has 10200 states and 30987 transitions. Word has length 7 [2022-12-14 13:48:24,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:48:24,485 INFO L495 AbstractCegarLoop]: Abstraction has 10200 states and 30987 transitions. [2022-12-14 13:48:24,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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 13:48:24,485 INFO L276 IsEmpty]: Start isEmpty. Operand 10200 states and 30987 transitions. [2022-12-14 13:48:24,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 13:48:24,486 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:48:24,486 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:48:24,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 13:48:24,486 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2022-12-14 13:48:24,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:48:24,486 INFO L85 PathProgramCache]: Analyzing trace with hash -496138085, now seen corresponding path program 1 times [2022-12-14 13:48:24,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:48:24,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025140586] [2022-12-14 13:48:24,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:48:24,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:48:24,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:48:24,561 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 13:48:24,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:48:24,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025140586] [2022-12-14 13:48:24,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025140586] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:48:24,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:48:24,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:48:24,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931588732] [2022-12-14 13:48:24,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:48:24,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:48:24,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:48:24,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:48:24,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:48:24,563 INFO L87 Difference]: Start difference. First operand 10200 states and 30987 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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 13:48:24,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:48:24,669 INFO L93 Difference]: Finished difference Result 8508 states and 25071 transitions. [2022-12-14 13:48:24,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:48:24,670 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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 13:48:24,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:48:24,695 INFO L225 Difference]: With dead ends: 8508 [2022-12-14 13:48:24,695 INFO L226 Difference]: Without dead ends: 8508 [2022-12-14 13:48:24,696 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 13:48:24,696 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 56 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:48:24,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 42 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:48:24,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8508 states. [2022-12-14 13:48:24,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8508 to 8508. [2022-12-14 13:48:24,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8508 states, 8235 states have (on average 3.0444444444444443) internal successors, (25071), 8507 states have internal predecessors, (25071), 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 13:48:24,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8508 states to 8508 states and 25071 transitions. [2022-12-14 13:48:24,887 INFO L78 Accepts]: Start accepts. Automaton has 8508 states and 25071 transitions. Word has length 7 [2022-12-14 13:48:24,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:48:24,888 INFO L495 AbstractCegarLoop]: Abstraction has 8508 states and 25071 transitions. [2022-12-14 13:48:24,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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 13:48:24,888 INFO L276 IsEmpty]: Start isEmpty. Operand 8508 states and 25071 transitions. [2022-12-14 13:48:24,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 13:48:24,888 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:48:24,888 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:48:24,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 13:48:24,889 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err8ASSERT_VIOLATIONARRAY_INDEX === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2022-12-14 13:48:24,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:48:24,889 INFO L85 PathProgramCache]: Analyzing trace with hash -47303000, now seen corresponding path program 1 times [2022-12-14 13:48:24,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:48:24,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132927997] [2022-12-14 13:48:24,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:48:24,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:48:24,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:48:24,993 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 13:48:24,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:48:24,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132927997] [2022-12-14 13:48:24,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132927997] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:48:24,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:48:24,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:48:24,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112037092] [2022-12-14 13:48:24,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:48:24,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:48:24,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:48:24,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:48:24,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:48:24,995 INFO L87 Difference]: Start difference. First operand 8508 states and 25071 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 13:48:25,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:48:25,142 INFO L93 Difference]: Finished difference Result 9047 states and 26569 transitions. [2022-12-14 13:48:25,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:48:25,143 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 13:48:25,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:48:25,168 INFO L225 Difference]: With dead ends: 9047 [2022-12-14 13:48:25,168 INFO L226 Difference]: Without dead ends: 9047 [2022-12-14 13:48:25,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:48:25,169 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 29 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:48:25,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 64 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:48:25,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9047 states. [2022-12-14 13:48:25,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9047 to 8842. [2022-12-14 13:48:25,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8842 states, 8569 states have (on average 3.03407632162446) internal successors, (25999), 8841 states have internal predecessors, (25999), 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 13:48:25,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8842 states to 8842 states and 25999 transitions. [2022-12-14 13:48:25,381 INFO L78 Accepts]: Start accepts. Automaton has 8842 states and 25999 transitions. Word has length 9 [2022-12-14 13:48:25,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:48:25,381 INFO L495 AbstractCegarLoop]: Abstraction has 8842 states and 25999 transitions. [2022-12-14 13:48:25,382 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 13:48:25,382 INFO L276 IsEmpty]: Start isEmpty. Operand 8842 states and 25999 transitions. [2022-12-14 13:48:25,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 13:48:25,382 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:48:25,382 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-14 13:48:25,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 13:48:25,382 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2022-12-14 13:48:25,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:48:25,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1652685857, now seen corresponding path program 1 times [2022-12-14 13:48:25,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:48:25,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414406224] [2022-12-14 13:48:25,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:48:25,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:48:25,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 13:48:25,392 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 13:48:25,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 13:48:25,401 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 13:48:25,402 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 13:48:25,402 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (48 of 49 remaining) [2022-12-14 13:48:25,402 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 49 remaining) [2022-12-14 13:48:25,402 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 49 remaining) [2022-12-14 13:48:25,402 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 49 remaining) [2022-12-14 13:48:25,403 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 49 remaining) [2022-12-14 13:48:25,403 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 49 remaining) [2022-12-14 13:48:25,403 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 49 remaining) [2022-12-14 13:48:25,403 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 49 remaining) [2022-12-14 13:48:25,403 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 49 remaining) [2022-12-14 13:48:25,403 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (39 of 49 remaining) [2022-12-14 13:48:25,403 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 49 remaining) [2022-12-14 13:48:25,403 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 49 remaining) [2022-12-14 13:48:25,404 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (36 of 49 remaining) [2022-12-14 13:48:25,404 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (35 of 49 remaining) [2022-12-14 13:48:25,404 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 49 remaining) [2022-12-14 13:48:25,404 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 49 remaining) [2022-12-14 13:48:25,404 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 49 remaining) [2022-12-14 13:48:25,404 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 49 remaining) [2022-12-14 13:48:25,404 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (30 of 49 remaining) [2022-12-14 13:48:25,404 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 49 remaining) [2022-12-14 13:48:25,404 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 49 remaining) [2022-12-14 13:48:25,405 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 49 remaining) [2022-12-14 13:48:25,405 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 49 remaining) [2022-12-14 13:48:25,405 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 49 remaining) [2022-12-14 13:48:25,405 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 49 remaining) [2022-12-14 13:48:25,405 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 49 remaining) [2022-12-14 13:48:25,405 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 49 remaining) [2022-12-14 13:48:25,405 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (21 of 49 remaining) [2022-12-14 13:48:25,405 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 49 remaining) [2022-12-14 13:48:25,406 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 49 remaining) [2022-12-14 13:48:25,406 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (18 of 49 remaining) [2022-12-14 13:48:25,406 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (17 of 49 remaining) [2022-12-14 13:48:25,406 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 49 remaining) [2022-12-14 13:48:25,406 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 49 remaining) [2022-12-14 13:48:25,406 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 49 remaining) [2022-12-14 13:48:25,406 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 49 remaining) [2022-12-14 13:48:25,406 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 49 remaining) [2022-12-14 13:48:25,407 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 49 remaining) [2022-12-14 13:48:25,407 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 49 remaining) [2022-12-14 13:48:25,407 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 49 remaining) [2022-12-14 13:48:25,407 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 49 remaining) [2022-12-14 13:48:25,407 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 49 remaining) [2022-12-14 13:48:25,407 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (6 of 49 remaining) [2022-12-14 13:48:25,407 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 49 remaining) [2022-12-14 13:48:25,407 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 49 remaining) [2022-12-14 13:48:25,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (3 of 49 remaining) [2022-12-14 13:48:25,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (2 of 49 remaining) [2022-12-14 13:48:25,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 49 remaining) [2022-12-14 13:48:25,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 49 remaining) [2022-12-14 13:48:25,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 13:48:25,408 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-12-14 13:48:25,409 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-14 13:48:25,409 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-14 13:48:25,439 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 13:48:25,442 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 13:48:25,443 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 220 places, 229 transitions, 479 flow [2022-12-14 13:48:25,443 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 220 places, 229 transitions, 479 flow [2022-12-14 13:48:25,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 229 transitions, 479 flow [2022-12-14 13:48:25,492 INFO L130 PetriNetUnfolder]: 19/281 cut-off events. [2022-12-14 13:48:25,492 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-14 13:48:25,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 281 events. 19/281 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1064 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 207. Up to 8 conditions per place. [2022-12-14 13:48:25,510 INFO L119 LiptonReduction]: Number of co-enabled transitions 31374 [2022-12-14 13:48:28,086 INFO L134 LiptonReduction]: Checked pairs total: 150229 [2022-12-14 13:48:28,086 INFO L136 LiptonReduction]: Total number of compositions: 179 [2022-12-14 13:48:28,087 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 113 places, 112 transitions, 245 flow [2022-12-14 13:48:33,176 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 312843 states, 291275 states have (on average 4.248016479272166) internal successors, (1237341), 312842 states have internal predecessors, (1237341), 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 13:48:33,177 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:48:33,177 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;@351f1bc7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:48:33,177 INFO L358 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2022-12-14 13:48:33,479 INFO L276 IsEmpty]: Start isEmpty. Operand has 312843 states, 291275 states have (on average 4.248016479272166) internal successors, (1237341), 312842 states have internal predecessors, (1237341), 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 13:48:33,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 13:48:33,480 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:48:33,480 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 13:48:33,480 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-14 13:48:33,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:48:33,481 INFO L85 PathProgramCache]: Analyzing trace with hash 43587, now seen corresponding path program 1 times [2022-12-14 13:48:33,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:48:33,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3962414] [2022-12-14 13:48:33,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:48:33,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:48:33,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:48:33,488 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 13:48:33,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:48:33,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3962414] [2022-12-14 13:48:33,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3962414] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:48:33,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:48:33,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 13:48:33,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343516669] [2022-12-14 13:48:33,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:48:33,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 13:48:33,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:48:33,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 13:48:33,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 13:48:33,793 INFO L87 Difference]: Start difference. First operand has 312843 states, 291275 states have (on average 4.248016479272166) internal successors, (1237341), 312842 states have internal predecessors, (1237341), 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 2 states, 1 states have (on average 2.0) 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 13:48:35,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:48:35,928 INFO L93 Difference]: Finished difference Result 221413 states and 855468 transitions. [2022-12-14 13:48:35,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 13:48:35,929 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 2.0) 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 13:48:35,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:48:37,451 INFO L225 Difference]: With dead ends: 221413 [2022-12-14 13:48:37,452 INFO L226 Difference]: Without dead ends: 221413 [2022-12-14 13:48:37,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 13:48:37,452 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:48:37,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:48:37,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221413 states. [2022-12-14 13:48:42,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221413 to 221413. [2022-12-14 13:48:43,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221413 states, 210806 states have (on average 4.058081838277848) internal successors, (855468), 221412 states have internal predecessors, (855468), 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 13:48:44,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221413 states to 221413 states and 855468 transitions. [2022-12-14 13:48:44,391 INFO L78 Accepts]: Start accepts. Automaton has 221413 states and 855468 transitions. Word has length 2 [2022-12-14 13:48:44,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:48:44,391 INFO L495 AbstractCegarLoop]: Abstraction has 221413 states and 855468 transitions. [2022-12-14 13:48:44,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 2.0) 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 13:48:44,391 INFO L276 IsEmpty]: Start isEmpty. Operand 221413 states and 855468 transitions. [2022-12-14 13:48:44,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 13:48:44,391 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:48:44,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 13:48:44,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 13:48:44,392 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-14 13:48:44,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:48:44,392 INFO L85 PathProgramCache]: Analyzing trace with hash 43575, now seen corresponding path program 1 times [2022-12-14 13:48:44,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:48:44,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064969653] [2022-12-14 13:48:44,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:48:44,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:48:44,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:48:44,408 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 13:48:44,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:48:44,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064969653] [2022-12-14 13:48:44,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064969653] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:48:44,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:48:44,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 13:48:44,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940661538] [2022-12-14 13:48:44,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:48:44,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:48:44,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:48:44,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:48:44,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:48:44,409 INFO L87 Difference]: Start difference. First operand 221413 states and 855468 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 13:48:47,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:48:47,862 INFO L93 Difference]: Finished difference Result 402825 states and 1551048 transitions. [2022-12-14 13:48:47,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:48:47,863 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 13:48:47,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:48:50,272 INFO L225 Difference]: With dead ends: 402825 [2022-12-14 13:48:50,272 INFO L226 Difference]: Without dead ends: 402825 [2022-12-14 13:48:50,272 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 13:48:50,273 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 96 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:48:50,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 44 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:48:51,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402825 states. [2022-12-14 13:48:59,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402825 to 311600. [2022-12-14 13:48:59,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311600 states, 300994 states have (on average 4.135484428261028) internal successors, (1244756), 311599 states have internal predecessors, (1244756), 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 13:49:01,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311600 states to 311600 states and 1244756 transitions. [2022-12-14 13:49:01,271 INFO L78 Accepts]: Start accepts. Automaton has 311600 states and 1244756 transitions. Word has length 2 [2022-12-14 13:49:01,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:49:01,272 INFO L495 AbstractCegarLoop]: Abstraction has 311600 states and 1244756 transitions. [2022-12-14 13:49:01,272 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 13:49:01,272 INFO L276 IsEmpty]: Start isEmpty. Operand 311600 states and 1244756 transitions. [2022-12-14 13:49:01,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 13:49:01,272 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:49:01,272 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 13:49:01,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 13:49:01,272 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-14 13:49:01,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:49:01,273 INFO L85 PathProgramCache]: Analyzing trace with hash 43577, now seen corresponding path program 1 times [2022-12-14 13:49:01,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:49:01,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434821788] [2022-12-14 13:49:01,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:49:01,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:49:01,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:49:01,302 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 13:49:01,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:49:01,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434821788] [2022-12-14 13:49:01,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434821788] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:49:01,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:49:01,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 13:49:01,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456713111] [2022-12-14 13:49:01,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:49:01,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:49:01,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:49:01,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:49:01,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:49:01,303 INFO L87 Difference]: Start difference. First operand 311600 states and 1244756 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 13:49:03,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:49:03,752 INFO L93 Difference]: Finished difference Result 279823 states and 1087991 transitions. [2022-12-14 13:49:03,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:49:03,753 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 13:49:03,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:49:05,535 INFO L225 Difference]: With dead ends: 279823 [2022-12-14 13:49:05,535 INFO L226 Difference]: Without dead ends: 279823 [2022-12-14 13:49:05,535 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 13:49:05,536 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 100 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:49:05,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 23 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:49:06,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279823 states. [2022-12-14 13:49:11,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279823 to 279823. [2022-12-14 13:49:12,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279823 states, 272833 states have (on average 3.987754413872222) internal successors, (1087991), 279822 states have internal predecessors, (1087991), 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 13:49:13,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279823 states to 279823 states and 1087991 transitions. [2022-12-14 13:49:13,457 INFO L78 Accepts]: Start accepts. Automaton has 279823 states and 1087991 transitions. Word has length 2 [2022-12-14 13:49:13,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:49:13,457 INFO L495 AbstractCegarLoop]: Abstraction has 279823 states and 1087991 transitions. [2022-12-14 13:49:13,458 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 13:49:13,458 INFO L276 IsEmpty]: Start isEmpty. Operand 279823 states and 1087991 transitions. [2022-12-14 13:49:13,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 13:49:13,458 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:49:13,458 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:49:13,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 13:49:13,458 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-14 13:49:13,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:49:13,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1184433048, now seen corresponding path program 1 times [2022-12-14 13:49:13,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:49:13,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778501299] [2022-12-14 13:49:13,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:49:13,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:49:13,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:49:13,483 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 13:49:13,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:49:13,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778501299] [2022-12-14 13:49:13,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778501299] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:49:13,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:49:13,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:49:13,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190220720] [2022-12-14 13:49:13,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:49:13,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:49:13,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:49:13,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:49:13,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:49:13,485 INFO L87 Difference]: Start difference. First operand 279823 states and 1087991 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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 13:49:17,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:49:17,397 INFO L93 Difference]: Finished difference Result 466753 states and 1819853 transitions. [2022-12-14 13:49:17,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:49:17,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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 13:49:17,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:49:20,208 INFO L225 Difference]: With dead ends: 466753 [2022-12-14 13:49:20,208 INFO L226 Difference]: Without dead ends: 466753 [2022-12-14 13:49:20,208 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 13:49:20,208 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 85 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:49:20,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 64 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:49:21,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466753 states. [2022-12-14 13:49:29,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466753 to 364153. [2022-12-14 13:49:30,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364153 states, 357169 states have (on average 4.175986717772259) internal successors, (1491533), 364152 states have internal predecessors, (1491533), 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 13:49:32,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364153 states to 364153 states and 1491533 transitions. [2022-12-14 13:49:32,329 INFO L78 Accepts]: Start accepts. Automaton has 364153 states and 1491533 transitions. Word has length 7 [2022-12-14 13:49:32,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:49:32,329 INFO L495 AbstractCegarLoop]: Abstraction has 364153 states and 1491533 transitions. [2022-12-14 13:49:32,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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 13:49:32,329 INFO L276 IsEmpty]: Start isEmpty. Operand 364153 states and 1491533 transitions. [2022-12-14 13:49:32,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 13:49:32,330 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:49:32,330 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:49:32,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 13:49:32,330 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-14 13:49:32,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:49:32,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1184433047, now seen corresponding path program 1 times [2022-12-14 13:49:32,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:49:32,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887272025] [2022-12-14 13:49:32,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:49:32,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:49:32,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:49:32,377 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 13:49:32,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:49:32,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887272025] [2022-12-14 13:49:32,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887272025] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:49:32,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:49:32,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:49:32,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935159905] [2022-12-14 13:49:32,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:49:32,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:49:32,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:49:32,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:49:32,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:49:32,378 INFO L87 Difference]: Start difference. First operand 364153 states and 1491533 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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 13:49:35,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:49:35,041 INFO L93 Difference]: Finished difference Result 311683 states and 1237865 transitions. [2022-12-14 13:49:35,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:49:35,042 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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 13:49:35,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:49:36,919 INFO L225 Difference]: With dead ends: 311683 [2022-12-14 13:49:36,919 INFO L226 Difference]: Without dead ends: 311683 [2022-12-14 13:49:36,919 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 13:49:36,920 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 87 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:49:36,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 62 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:49:37,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311683 states.