./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-barrier.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 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_547c040c-7b60-487e-96a3-308d26c91e72/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_547c040c-7b60-487e-96a3-308d26c91e72/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_547c040c-7b60-487e-96a3-308d26c91e72/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_547c040c-7b60-487e-96a3-308d26c91e72/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-barrier.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_547c040c-7b60-487e-96a3-308d26c91e72/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_547c040c-7b60-487e-96a3-308d26c91e72/bin/utaipan-Q6hlc19bkW --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 22b51332425cd14048935a20a73abea0065b1633fac56d6d6be511ab67585236 --- 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-4e7fbc6 [2022-11-23 16:11:52,355 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 16:11:52,357 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 16:11:52,385 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 16:11:52,390 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 16:11:52,393 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 16:11:52,396 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 16:11:52,399 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 16:11:52,401 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 16:11:52,401 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 16:11:52,402 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 16:11:52,404 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 16:11:52,404 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 16:11:52,405 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 16:11:52,406 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 16:11:52,407 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 16:11:52,408 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 16:11:52,409 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 16:11:52,419 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 16:11:52,421 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 16:11:52,422 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 16:11:52,423 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 16:11:52,424 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 16:11:52,425 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 16:11:52,428 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 16:11:52,429 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 16:11:52,429 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 16:11:52,430 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 16:11:52,431 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 16:11:52,432 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 16:11:52,432 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 16:11:52,433 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 16:11:52,434 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 16:11:52,435 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 16:11:52,436 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 16:11:52,436 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 16:11:52,437 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 16:11:52,437 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 16:11:52,437 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 16:11:52,438 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 16:11:52,439 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 16:11:52,443 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_547c040c-7b60-487e-96a3-308d26c91e72/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-23 16:11:52,476 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 16:11:52,477 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 16:11:52,477 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 16:11:52,478 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 16:11:52,478 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 16:11:52,479 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 16:11:52,479 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 16:11:52,479 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 16:11:52,479 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 16:11:52,480 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 16:11:52,480 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 16:11:52,481 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 16:11:52,481 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 16:11:52,481 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 16:11:52,481 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 16:11:52,482 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 16:11:52,482 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 16:11:52,482 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 16:11:52,483 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 16:11:52,483 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 16:11:52,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 16:11:52,483 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 16:11:52,484 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 16:11:52,484 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 16:11:52,484 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 16:11:52,484 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 16:11:52,484 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 16:11:52,485 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 16:11:52,485 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 16:11:52,485 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 16:11:52,485 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 16:11:52,486 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 16:11:52,486 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 16:11:52,486 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 16:11:52,486 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 16:11:52,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 16:11:52,487 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 16:11:52,487 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 16:11:52,487 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 16:11:52,487 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 16:11:52,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 16:11:52,488 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 16:11:52,488 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_547c040c-7b60-487e-96a3-308d26c91e72/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_547c040c-7b60-487e-96a3-308d26c91e72/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22b51332425cd14048935a20a73abea0065b1633fac56d6d6be511ab67585236 [2022-11-23 16:11:52,800 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 16:11:52,833 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 16:11:52,835 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 16:11:52,837 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 16:11:52,838 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 16:11:52,839 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_547c040c-7b60-487e-96a3-308d26c91e72/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/weaver/parallel-barrier.wvr.c [2022-11-23 16:11:55,862 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 16:11:56,130 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 16:11:56,131 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_547c040c-7b60-487e-96a3-308d26c91e72/sv-benchmarks/c/weaver/parallel-barrier.wvr.c [2022-11-23 16:11:56,139 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_547c040c-7b60-487e-96a3-308d26c91e72/bin/utaipan-Q6hlc19bkW/data/438f1dc6f/de3ce16da6e54aa3a58f0a5fb808a3c8/FLAG1297ac92d [2022-11-23 16:11:56,154 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_547c040c-7b60-487e-96a3-308d26c91e72/bin/utaipan-Q6hlc19bkW/data/438f1dc6f/de3ce16da6e54aa3a58f0a5fb808a3c8 [2022-11-23 16:11:56,157 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 16:11:56,159 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 16:11:56,160 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 16:11:56,160 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 16:11:56,164 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 16:11:56,165 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:11:56" (1/1) ... [2022-11-23 16:11:56,166 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55fb2e43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:11:56, skipping insertion in model container [2022-11-23 16:11:56,167 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:11:56" (1/1) ... [2022-11-23 16:11:56,174 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 16:11:56,197 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 16:11:56,385 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_547c040c-7b60-487e-96a3-308d26c91e72/sv-benchmarks/c/weaver/parallel-barrier.wvr.c[4722,4735] [2022-11-23 16:11:56,390 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 16:11:56,402 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 16:11:56,431 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_547c040c-7b60-487e-96a3-308d26c91e72/sv-benchmarks/c/weaver/parallel-barrier.wvr.c[4722,4735] [2022-11-23 16:11:56,432 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 16:11:56,446 INFO L208 MainTranslator]: Completed translation [2022-11-23 16:11:56,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:11:56 WrapperNode [2022-11-23 16:11:56,446 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 16:11:56,447 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 16:11:56,447 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 16:11:56,448 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 16:11:56,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:11:56" (1/1) ... [2022-11-23 16:11:56,464 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:11:56" (1/1) ... [2022-11-23 16:11:56,492 INFO L138 Inliner]: procedures = 25, calls = 98, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 253 [2022-11-23 16:11:56,492 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 16:11:56,493 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 16:11:56,493 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 16:11:56,493 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 16:11:56,503 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:11:56" (1/1) ... [2022-11-23 16:11:56,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:11:56" (1/1) ... [2022-11-23 16:11:56,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:11:56" (1/1) ... [2022-11-23 16:11:56,508 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:11:56" (1/1) ... [2022-11-23 16:11:56,515 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:11:56" (1/1) ... [2022-11-23 16:11:56,517 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:11:56" (1/1) ... [2022-11-23 16:11:56,519 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:11:56" (1/1) ... [2022-11-23 16:11:56,521 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:11:56" (1/1) ... [2022-11-23 16:11:56,524 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 16:11:56,525 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 16:11:56,525 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 16:11:56,525 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 16:11:56,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:11:56" (1/1) ... [2022-11-23 16:11:56,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 16:11:56,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_547c040c-7b60-487e-96a3-308d26c91e72/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:11:56,567 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_547c040c-7b60-487e-96a3-308d26c91e72/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 16:11:56,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_547c040c-7b60-487e-96a3-308d26c91e72/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 16:11:56,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 16:11:56,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 16:11:56,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 16:11:56,611 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 16:11:56,611 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-23 16:11:56,611 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-23 16:11:56,611 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-23 16:11:56,611 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-23 16:11:56,612 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-23 16:11:56,612 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-23 16:11:56,612 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-23 16:11:56,612 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-23 16:11:56,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 16:11:56,612 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2022-11-23 16:11:56,613 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2022-11-23 16:11:56,613 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2022-11-23 16:11:56,613 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2022-11-23 16:11:56,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-23 16:11:56,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-23 16:11:56,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 16:11:56,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 16:11:56,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 16:11:56,616 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 16:11:56,816 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 16:11:56,818 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 16:11:57,391 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 16:11:57,509 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 16:11:57,509 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-23 16:11:57,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:11:57 BoogieIcfgContainer [2022-11-23 16:11:57,512 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 16:11:57,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 16:11:57,515 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 16:11:57,519 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 16:11:57,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:11:56" (1/3) ... [2022-11-23 16:11:57,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@671a595e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:11:57, skipping insertion in model container [2022-11-23 16:11:57,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:11:56" (2/3) ... [2022-11-23 16:11:57,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@671a595e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:11:57, skipping insertion in model container [2022-11-23 16:11:57,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:11:57" (3/3) ... [2022-11-23 16:11:57,522 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-barrier.wvr.c [2022-11-23 16:11:57,544 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 16:11:57,544 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2022-11-23 16:11:57,544 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 16:11:57,683 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2022-11-23 16:11:57,724 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 16:11:57,741 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 278 places, 267 transitions, 606 flow [2022-11-23 16:11:57,744 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 278 places, 267 transitions, 606 flow [2022-11-23 16:11:57,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 278 places, 267 transitions, 606 flow [2022-11-23 16:11:57,862 INFO L130 PetriNetUnfolder]: 8/235 cut-off events. [2022-11-23 16:11:57,862 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-23 16:11:57,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 235 events. 8/235 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 366 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 198. Up to 3 conditions per place. [2022-11-23 16:11:57,879 INFO L119 LiptonReduction]: Number of co-enabled transitions 10984 [2022-11-23 16:12:05,629 INFO L134 LiptonReduction]: Checked pairs total: 66082 [2022-11-23 16:12:05,630 INFO L136 LiptonReduction]: Total number of compositions: 196 [2022-11-23 16:12:05,643 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 128 places, 113 transitions, 298 flow [2022-11-23 16:12:11,357 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 113233 states, 112951 states have (on average 4.95025276447309) internal successors, (559136), 113232 states have internal predecessors, (559136), 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) [2022-11-23 16:12:11,383 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 16:12:11,390 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;@2369e9d6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 16:12:11,390 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2022-11-23 16:12:11,535 INFO L276 IsEmpty]: Start isEmpty. Operand has 113233 states, 112951 states have (on average 4.95025276447309) internal successors, (559136), 113232 states have internal predecessors, (559136), 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) [2022-11-23 16:12:11,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-11-23 16:12:11,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:12:11,541 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-11-23 16:12:11,542 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-23 16:12:11,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:12:11,547 INFO L85 PathProgramCache]: Analyzing trace with hash 930, now seen corresponding path program 1 times [2022-11-23 16:12:11,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:12:11,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146898701] [2022-11-23 16:12:11,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:12:11,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:12:11,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:12:11,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:12:11,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:12:11,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146898701] [2022-11-23 16:12:11,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146898701] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:12:11,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:12:11,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-23 16:12:11,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275526026] [2022-11-23 16:12:11,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:12:11,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 16:12:11,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:12:11,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 16:12:11,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 16:12:12,202 INFO L87 Difference]: Start difference. First operand has 113233 states, 112951 states have (on average 4.95025276447309) internal successors, (559136), 113232 states have internal predecessors, (559136), 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 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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) [2022-11-23 16:12:15,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:12:15,490 INFO L93 Difference]: Finished difference Result 113230 states and 559133 transitions. [2022-11-23 16:12:15,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 16:12:15,493 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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 1 [2022-11-23 16:12:15,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:12:17,261 INFO L225 Difference]: With dead ends: 113230 [2022-11-23 16:12:17,262 INFO L226 Difference]: Without dead ends: 113230 [2022-11-23 16:12:17,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 16:12:17,268 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:12:17,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:12:17,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113230 states. [2022-11-23 16:12:23,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113230 to 113230. [2022-11-23 16:12:23,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113230 states, 112951 states have (on average 4.950226204283274) internal successors, (559133), 113229 states have internal predecessors, (559133), 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) [2022-11-23 16:12:25,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113230 states to 113230 states and 559133 transitions. [2022-11-23 16:12:25,765 INFO L78 Accepts]: Start accepts. Automaton has 113230 states and 559133 transitions. Word has length 1 [2022-11-23 16:12:25,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:12:25,766 INFO L495 AbstractCegarLoop]: Abstraction has 113230 states and 559133 transitions. [2022-11-23 16:12:25,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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) [2022-11-23 16:12:25,766 INFO L276 IsEmpty]: Start isEmpty. Operand 113230 states and 559133 transitions. [2022-11-23 16:12:25,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 16:12:25,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:12:25,767 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 16:12:25,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 16:12:25,768 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-23 16:12:25,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:12:25,769 INFO L85 PathProgramCache]: Analyzing trace with hash 880616820, now seen corresponding path program 1 times [2022-11-23 16:12:25,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:12:25,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169464557] [2022-11-23 16:12:25,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:12:25,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:12:25,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:12:25,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:12:25,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:12:25,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169464557] [2022-11-23 16:12:25,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169464557] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:12:26,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:12:26,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 16:12:26,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976853223] [2022-11-23 16:12:26,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:12:26,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:12:26,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:12:26,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:12:26,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:12:26,003 INFO L87 Difference]: Start difference. First operand 113230 states and 559133 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-11-23 16:12:28,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:12:28,057 INFO L93 Difference]: Finished difference Result 114721 states and 564278 transitions. [2022-11-23 16:12:28,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:12:28,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2022-11-23 16:12:28,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:12:28,921 INFO L225 Difference]: With dead ends: 114721 [2022-11-23 16:12:28,921 INFO L226 Difference]: Without dead ends: 114721 [2022-11-23 16:12:28,922 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 [2022-11-23 16:12:28,923 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 74 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 16:12:28,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 39 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 16:12:29,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114721 states. [2022-11-23 16:12:33,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114721 to 113561. [2022-11-23 16:12:34,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113561 states, 113290 states have (on average 4.948901050401624) internal successors, (560661), 113560 states have internal predecessors, (560661), 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) [2022-11-23 16:12:35,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113561 states to 113561 states and 560661 transitions. [2022-11-23 16:12:35,606 INFO L78 Accepts]: Start accepts. Automaton has 113561 states and 560661 transitions. Word has length 5 [2022-11-23 16:12:35,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:12:35,607 INFO L495 AbstractCegarLoop]: Abstraction has 113561 states and 560661 transitions. [2022-11-23 16:12:35,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-11-23 16:12:35,607 INFO L276 IsEmpty]: Start isEmpty. Operand 113561 states and 560661 transitions. [2022-11-23 16:12:35,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 16:12:35,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:12:35,608 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 16:12:35,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 16:12:35,609 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-23 16:12:35,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:12:35,609 INFO L85 PathProgramCache]: Analyzing trace with hash 880616821, now seen corresponding path program 1 times [2022-11-23 16:12:35,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:12:35,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446793568] [2022-11-23 16:12:35,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:12:35,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:12:35,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:12:35,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:12:35,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:12:35,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446793568] [2022-11-23 16:12:35,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446793568] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:12:35,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:12:35,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 16:12:35,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169667834] [2022-11-23 16:12:35,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:12:35,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:12:35,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:12:35,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:12:35,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:12:35,774 INFO L87 Difference]: Start difference. First operand 113561 states and 560661 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-11-23 16:12:37,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:12:37,765 INFO L93 Difference]: Finished difference Result 113227 states and 559458 transitions. [2022-11-23 16:12:37,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:12:37,766 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2022-11-23 16:12:37,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:12:38,886 INFO L225 Difference]: With dead ends: 113227 [2022-11-23 16:12:38,886 INFO L226 Difference]: Without dead ends: 113227 [2022-11-23 16:12:38,886 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 [2022-11-23 16:12:38,888 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 79 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:12:38,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 19 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:12:39,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113227 states. [2022-11-23 16:12:42,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113227 to 113227. [2022-11-23 16:12:43,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113227 states, 112974 states have (on average 4.952095172340538) internal successors, (559458), 113226 states have internal predecessors, (559458), 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) [2022-11-23 16:12:44,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113227 states to 113227 states and 559458 transitions. [2022-11-23 16:12:44,707 INFO L78 Accepts]: Start accepts. Automaton has 113227 states and 559458 transitions. Word has length 5 [2022-11-23 16:12:44,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:12:44,707 INFO L495 AbstractCegarLoop]: Abstraction has 113227 states and 559458 transitions. [2022-11-23 16:12:44,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-11-23 16:12:44,707 INFO L276 IsEmpty]: Start isEmpty. Operand 113227 states and 559458 transitions. [2022-11-23 16:12:44,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 16:12:44,708 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:12:44,708 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:12:44,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 16:12:44,709 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-11-23 16:12:44,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:12:44,710 INFO L85 PathProgramCache]: Analyzing trace with hash 164227567, now seen corresponding path program 1 times [2022-11-23 16:12:44,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:12:44,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805115155] [2022-11-23 16:12:44,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:12:44,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:12:44,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:12:44,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:12:44,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:12:44,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805115155] [2022-11-23 16:12:44,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805115155] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:12:44,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:12:44,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 16:12:44,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315268838] [2022-11-23 16:12:44,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:12:44,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:12:44,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:12:44,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:12:44,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:12:44,847 INFO L87 Difference]: Start difference. First operand 113227 states and 559458 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:12:46,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:12:46,608 INFO L93 Difference]: Finished difference Result 85338 states and 413836 transitions. [2022-11-23 16:12:46,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:12:46,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-23 16:12:46,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:12:47,222 INFO L225 Difference]: With dead ends: 85338 [2022-11-23 16:12:47,223 INFO L226 Difference]: Without dead ends: 85338 [2022-11-23 16:12:47,223 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 [2022-11-23 16:12:47,224 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 76 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:12:47,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 20 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:12:47,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85338 states.