./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_24-sound_lock_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f 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_e9dbc54d-33b4-4af4-9833-fbf8188f3394/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dbc54d-33b4-4af4-9833-fbf8188f3394/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dbc54d-33b4-4af4-9833-fbf8188f3394/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dbc54d-33b4-4af4-9833-fbf8188f3394/bin/utaipan-Xvt2sAort0/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_24-sound_lock_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dbc54d-33b4-4af4-9833-fbf8188f3394/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dbc54d-33b4-4af4-9833-fbf8188f3394/bin/utaipan-Xvt2sAort0 --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 1eea0d699fc30cae440905f5eeea19b8e9e5d0b5cc249e9ffded8d356549b279 --- 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-e04fb08 [2022-11-16 15:58:26,194 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 15:58:26,197 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 15:58:26,235 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 15:58:26,235 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 15:58:26,239 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 15:58:26,241 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 15:58:26,246 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 15:58:26,248 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 15:58:26,253 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 15:58:26,254 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 15:58:26,255 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 15:58:26,256 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 15:58:26,256 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 15:58:26,257 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 15:58:26,258 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 15:58:26,259 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 15:58:26,260 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 15:58:26,261 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 15:58:26,269 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 15:58:26,271 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 15:58:26,272 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 15:58:26,275 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 15:58:26,277 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 15:58:26,288 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 15:58:26,288 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 15:58:26,289 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 15:58:26,290 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 15:58:26,290 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 15:58:26,291 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 15:58:26,292 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 15:58:26,293 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 15:58:26,295 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 15:58:26,296 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 15:58:26,297 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 15:58:26,297 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 15:58:26,298 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 15:58:26,298 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 15:58:26,300 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 15:58:26,301 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 15:58:26,301 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 15:58:26,302 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dbc54d-33b4-4af4-9833-fbf8188f3394/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-16 15:58:26,337 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 15:58:26,337 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 15:58:26,338 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 15:58:26,338 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 15:58:26,339 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 15:58:26,339 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 15:58:26,340 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 15:58:26,340 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 15:58:26,340 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 15:58:26,340 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 15:58:26,341 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 15:58:26,342 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 15:58:26,342 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 15:58:26,342 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 15:58:26,342 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 15:58:26,342 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 15:58:26,343 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 15:58:26,343 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 15:58:26,344 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 15:58:26,344 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 15:58:26,345 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 15:58:26,346 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 15:58:26,346 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 15:58:26,346 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 15:58:26,346 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 15:58:26,346 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 15:58:26,347 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 15:58:26,347 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 15:58:26,347 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 15:58:26,347 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 15:58:26,348 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 15:58:26,348 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 15:58:26,356 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 15:58:26,356 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 15:58:26,356 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 15:58:26,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 15:58:26,357 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 15:58:26,357 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 15:58:26,357 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 15:58:26,358 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 15:58:26,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 15:58:26,358 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 15:58:26,358 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_e9dbc54d-33b4-4af4-9833-fbf8188f3394/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dbc54d-33b4-4af4-9833-fbf8188f3394/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1eea0d699fc30cae440905f5eeea19b8e9e5d0b5cc249e9ffded8d356549b279 [2022-11-16 15:58:26,608 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 15:58:26,640 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 15:58:26,643 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 15:58:26,644 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 15:58:26,645 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 15:58:26,646 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dbc54d-33b4-4af4-9833-fbf8188f3394/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/goblint-regression/28-race_reach_24-sound_lock_racing.i [2022-11-16 15:58:26,729 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dbc54d-33b4-4af4-9833-fbf8188f3394/bin/utaipan-Xvt2sAort0/data/517975eaf/691d14abdb9c423c999e1389c12732fa/FLAG88c61a7e0 [2022-11-16 15:58:27,207 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 15:58:27,208 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dbc54d-33b4-4af4-9833-fbf8188f3394/sv-benchmarks/c/goblint-regression/28-race_reach_24-sound_lock_racing.i [2022-11-16 15:58:27,228 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dbc54d-33b4-4af4-9833-fbf8188f3394/bin/utaipan-Xvt2sAort0/data/517975eaf/691d14abdb9c423c999e1389c12732fa/FLAG88c61a7e0 [2022-11-16 15:58:27,559 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dbc54d-33b4-4af4-9833-fbf8188f3394/bin/utaipan-Xvt2sAort0/data/517975eaf/691d14abdb9c423c999e1389c12732fa [2022-11-16 15:58:27,561 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 15:58:27,562 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 15:58:27,564 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 15:58:27,564 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 15:58:27,568 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 15:58:27,568 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 03:58:27" (1/1) ... [2022-11-16 15:58:27,570 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68c1a80a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:58:27, skipping insertion in model container [2022-11-16 15:58:27,570 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 03:58:27" (1/1) ... [2022-11-16 15:58:27,577 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 15:58:27,634 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 15:58:28,014 WARN L229 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_e9dbc54d-33b4-4af4-9833-fbf8188f3394/sv-benchmarks/c/goblint-regression/28-race_reach_24-sound_lock_racing.i[30176,30189] [2022-11-16 15:58:28,043 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 15:58:28,057 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 15:58:28,111 WARN L229 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_e9dbc54d-33b4-4af4-9833-fbf8188f3394/sv-benchmarks/c/goblint-regression/28-race_reach_24-sound_lock_racing.i[30176,30189] [2022-11-16 15:58:28,120 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 15:58:28,165 INFO L208 MainTranslator]: Completed translation [2022-11-16 15:58:28,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:58:28 WrapperNode [2022-11-16 15:58:28,166 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 15:58:28,167 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 15:58:28,167 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 15:58:28,167 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 15:58:28,177 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:58:28" (1/1) ... [2022-11-16 15:58:28,214 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:58:28" (1/1) ... [2022-11-16 15:58:28,238 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2022-11-16 15:58:28,239 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 15:58:28,239 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 15:58:28,240 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 15:58:28,240 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 15:58:28,248 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:58:28" (1/1) ... [2022-11-16 15:58:28,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:58:28" (1/1) ... [2022-11-16 15:58:28,252 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:58:28" (1/1) ... [2022-11-16 15:58:28,252 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:58:28" (1/1) ... [2022-11-16 15:58:28,259 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:58:28" (1/1) ... [2022-11-16 15:58:28,263 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:58:28" (1/1) ... [2022-11-16 15:58:28,265 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:58:28" (1/1) ... [2022-11-16 15:58:28,266 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:58:28" (1/1) ... [2022-11-16 15:58:28,269 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 15:58:28,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 15:58:28,270 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 15:58:28,270 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 15:58:28,271 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:58:28" (1/1) ... [2022-11-16 15:58:28,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 15:58:28,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dbc54d-33b4-4af4-9833-fbf8188f3394/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:58:28,311 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dbc54d-33b4-4af4-9833-fbf8188f3394/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 15:58:28,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dbc54d-33b4-4af4-9833-fbf8188f3394/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 15:58:28,364 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 15:58:28,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 15:58:28,364 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-16 15:58:28,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 15:58:28,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 15:58:28,365 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-16 15:58:28,365 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-16 15:58:28,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 15:58:28,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 15:58:28,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 15:58:28,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 15:58:28,367 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 15:58:28,510 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 15:58:28,511 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 15:58:28,769 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 15:58:28,776 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 15:58:28,776 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-16 15:58:28,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 03:58:28 BoogieIcfgContainer [2022-11-16 15:58:28,778 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 15:58:28,780 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 15:58:28,780 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 15:58:28,793 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 15:58:28,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 03:58:27" (1/3) ... [2022-11-16 15:58:28,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bd2a183 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 03:58:28, skipping insertion in model container [2022-11-16 15:58:28,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:58:28" (2/3) ... [2022-11-16 15:58:28,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bd2a183 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 03:58:28, skipping insertion in model container [2022-11-16 15:58:28,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 03:58:28" (3/3) ... [2022-11-16 15:58:28,805 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_24-sound_lock_racing.i [2022-11-16 15:58:28,833 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 15:58:28,834 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-11-16 15:58:28,834 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 15:58:28,910 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-16 15:58:28,961 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 15:58:28,980 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 127 transitions, 262 flow [2022-11-16 15:58:28,989 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 127 transitions, 262 flow [2022-11-16 15:58:28,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 127 transitions, 262 flow [2022-11-16 15:58:29,130 INFO L130 PetriNetUnfolder]: 18/170 cut-off events. [2022-11-16 15:58:29,131 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-16 15:58:29,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 170 events. 18/170 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 411 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 87. Up to 4 conditions per place. [2022-11-16 15:58:29,142 INFO L119 LiptonReduction]: Number of co-enabled transitions 2744 [2022-11-16 15:58:34,729 INFO L134 LiptonReduction]: Checked pairs total: 4683 [2022-11-16 15:58:34,730 INFO L136 LiptonReduction]: Total number of compositions: 121 [2022-11-16 15:58:34,738 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 37 transitions, 82 flow [2022-11-16 15:58:34,767 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 186 states, 171 states have (on average 2.654970760233918) internal successors, (454), 185 states have internal predecessors, (454), 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) [2022-11-16 15:58:34,783 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 15:58:34,789 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;@cafc6f6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 15:58:34,790 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-16 15:58:34,792 INFO L276 IsEmpty]: Start isEmpty. Operand has 186 states, 171 states have (on average 2.654970760233918) internal successors, (454), 185 states have internal predecessors, (454), 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) [2022-11-16 15:58:34,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 15:58:34,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:58:34,798 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 15:58:34,799 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 15:58:34,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:58:34,804 INFO L85 PathProgramCache]: Analyzing trace with hash 15695, now seen corresponding path program 1 times [2022-11-16 15:58:34,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:58:34,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249905915] [2022-11-16 15:58:34,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:58:34,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:58:34,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:58:35,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:58:35,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:58:35,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249905915] [2022-11-16 15:58:35,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249905915] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 15:58:35,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 15:58:35,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 15:58:35,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792480424] [2022-11-16 15:58:35,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 15:58:35,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 15:58:35,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:58:35,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 15:58:35,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 15:58:35,191 INFO L87 Difference]: Start difference. First operand has 186 states, 171 states have (on average 2.654970760233918) internal successors, (454), 185 states have internal predecessors, (454), 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) [2022-11-16 15:58:35,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:58:35,299 INFO L93 Difference]: Finished difference Result 164 states and 290 transitions. [2022-11-16 15:58:35,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 15:58:35,301 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 [2022-11-16 15:58:35,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:58:35,315 INFO L225 Difference]: With dead ends: 164 [2022-11-16 15:58:35,315 INFO L226 Difference]: Without dead ends: 153 [2022-11-16 15:58:35,316 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 [2022-11-16 15:58:35,321 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 24 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 15:58:35,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 4 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 15:58:35,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-11-16 15:58:35,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-11-16 15:58:35,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 144 states have (on average 1.875) internal successors, (270), 152 states have internal predecessors, (270), 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) [2022-11-16 15:58:35,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 270 transitions. [2022-11-16 15:58:35,395 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 270 transitions. Word has length 2 [2022-11-16 15:58:35,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:58:35,396 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 270 transitions. [2022-11-16 15:58:35,396 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) [2022-11-16 15:58:35,397 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 270 transitions. [2022-11-16 15:58:35,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 15:58:35,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:58:35,398 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 15:58:35,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 15:58:35,399 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 15:58:35,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:58:35,399 INFO L85 PathProgramCache]: Analyzing trace with hash 15696, now seen corresponding path program 1 times [2022-11-16 15:58:35,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:58:35,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984117169] [2022-11-16 15:58:35,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:58:35,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:58:35,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:58:35,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:58:35,584 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:58:35,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984117169] [2022-11-16 15:58:35,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984117169] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 15:58:35,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 15:58:35,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 15:58:35,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484362151] [2022-11-16 15:58:35,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 15:58:35,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 15:58:35,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:58:35,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 15:58:35,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 15:58:35,588 INFO L87 Difference]: Start difference. First operand 153 states and 270 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) [2022-11-16 15:58:35,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:58:35,667 INFO L93 Difference]: Finished difference Result 147 states and 263 transitions. [2022-11-16 15:58:35,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 15:58:35,667 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 [2022-11-16 15:58:35,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:58:35,670 INFO L225 Difference]: With dead ends: 147 [2022-11-16 15:58:35,671 INFO L226 Difference]: Without dead ends: 147 [2022-11-16 15:58:35,672 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 [2022-11-16 15:58:35,674 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 15:58:35,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 6 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 15:58:35,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-16 15:58:35,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-11-16 15:58:35,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 140 states have (on average 1.8785714285714286) internal successors, (263), 146 states have internal predecessors, (263), 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) [2022-11-16 15:58:35,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 263 transitions. [2022-11-16 15:58:35,688 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 263 transitions. Word has length 2 [2022-11-16 15:58:35,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:58:35,689 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 263 transitions. [2022-11-16 15:58:35,689 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) [2022-11-16 15:58:35,689 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 263 transitions. [2022-11-16 15:58:35,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 15:58:35,690 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:58:35,690 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 15:58:35,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 15:58:35,690 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 15:58:35,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:58:35,691 INFO L85 PathProgramCache]: Analyzing trace with hash 467880034, now seen corresponding path program 1 times [2022-11-16 15:58:35,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:58:35,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432269998] [2022-11-16 15:58:35,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:58:35,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:58:35,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:58:35,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:58:35,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:58:35,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432269998] [2022-11-16 15:58:35,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432269998] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:58:35,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086116095] [2022-11-16 15:58:35,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:58:35,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:58:35,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dbc54d-33b4-4af4-9833-fbf8188f3394/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:58:35,935 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dbc54d-33b4-4af4-9833-fbf8188f3394/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:58:35,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dbc54d-33b4-4af4-9833-fbf8188f3394/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 15:58:36,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:58:36,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 15:58:36,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:58:36,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 70 [2022-11-16 15:58:36,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 64 [2022-11-16 15:58:36,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:58:36,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:58:36,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:58:36,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086116095] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 15:58:36,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1399554689] [2022-11-16 15:58:36,407 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 15:58:36,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 15:58:36,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-16 15:58:36,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935740907] [2022-11-16 15:58:36,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 15:58:36,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 15:58:36,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:58:36,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 15:58:36,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-16 15:58:36,412 INFO L87 Difference]: Start difference. First operand 147 states and 263 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:58:36,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:58:36,494 INFO L93 Difference]: Finished difference Result 43 states and 69 transitions. [2022-11-16 15:58:36,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 15:58:36,494 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 15:58:36,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:58:36,495 INFO L225 Difference]: With dead ends: 43 [2022-11-16 15:58:36,495 INFO L226 Difference]: Without dead ends: 43 [2022-11-16 15:58:36,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-16 15:58:36,496 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 51 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 15:58:36,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 6 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 15:58:36,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-16 15:58:36,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-16 15:58:36,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 42 states have internal predecessors, (69), 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) [2022-11-16 15:58:36,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 69 transitions. [2022-11-16 15:58:36,500 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 69 transitions. Word has length 5 [2022-11-16 15:58:36,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:58:36,500 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 69 transitions. [2022-11-16 15:58:36,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:58:36,501 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 69 transitions. [2022-11-16 15:58:36,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 15:58:36,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:58:36,501 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-16 15:58:36,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dbc54d-33b4-4af4-9833-fbf8188f3394/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 15:58:36,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dbc54d-33b4-4af4-9833-fbf8188f3394/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-16 15:58:36,702 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 15:58:36,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:58:36,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1619379442, now seen corresponding path program 1 times [2022-11-16 15:58:36,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:58:36,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58457713] [2022-11-16 15:58:36,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:58:36,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:58:36,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 15:58:36,725 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 15:58:36,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 15:58:36,749 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-16 15:58:36,750 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 15:58:36,751 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-16 15:58:36,752 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-11-16 15:58:36,753 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-11-16 15:58:36,753 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-11-16 15:58:36,753 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-11-16 15:58:36,753 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-11-16 15:58:36,754 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-11-16 15:58:36,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 15:58:36,756 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-16 15:58:36,758 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 15:58:36,758 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-16 15:58:36,776 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 15:58:36,779 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 15:58:36,779 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 142 places, 157 transitions, 332 flow [2022-11-16 15:58:36,780 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 142 places, 157 transitions, 332 flow [2022-11-16 15:58:36,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 157 transitions, 332 flow [2022-11-16 15:58:36,828 INFO L130 PetriNetUnfolder]: 32/273 cut-off events. [2022-11-16 15:58:36,829 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-16 15:58:36,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 273 events. 32/273 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 809 event pairs, 0 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 172. Up to 8 conditions per place. [2022-11-16 15:58:36,837 INFO L119 LiptonReduction]: Number of co-enabled transitions 7672 [2022-11-16 15:58:42,280 INFO L134 LiptonReduction]: Checked pairs total: 17522 [2022-11-16 15:58:42,281 INFO L136 LiptonReduction]: Total number of compositions: 138 [2022-11-16 15:58:42,282 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 49 places, 60 transitions, 138 flow [2022-11-16 15:58:42,405 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2933 states, 2907 states have (on average 3.756449948400413) internal successors, (10920), 2932 states have internal predecessors, (10920), 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) [2022-11-16 15:58:42,407 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 15:58:42,407 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;@cafc6f6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 15:58:42,408 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-16 15:58:42,417 INFO L276 IsEmpty]: Start isEmpty. Operand has 2933 states, 2907 states have (on average 3.756449948400413) internal successors, (10920), 2932 states have internal predecessors, (10920), 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) [2022-11-16 15:58:42,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 15:58:42,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:58:42,418 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 15:58:42,419 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 15:58:42,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:58:42,419 INFO L85 PathProgramCache]: Analyzing trace with hash 26091, now seen corresponding path program 1 times [2022-11-16 15:58:42,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:58:42,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592199148] [2022-11-16 15:58:42,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:58:42,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:58:42,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:58:42,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:58:42,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:58:42,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592199148] [2022-11-16 15:58:42,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592199148] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 15:58:42,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 15:58:42,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 15:58:42,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040402980] [2022-11-16 15:58:42,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 15:58:42,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 15:58:42,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:58:42,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 15:58:42,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 15:58:42,467 INFO L87 Difference]: Start difference. First operand has 2933 states, 2907 states have (on average 3.756449948400413) internal successors, (10920), 2932 states have internal predecessors, (10920), 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) [2022-11-16 15:58:42,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:58:42,588 INFO L93 Difference]: Finished difference Result 2607 states and 6965 transitions. [2022-11-16 15:58:42,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 15:58:42,588 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 [2022-11-16 15:58:42,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:58:42,601 INFO L225 Difference]: With dead ends: 2607 [2022-11-16 15:58:42,602 INFO L226 Difference]: Without dead ends: 2438 [2022-11-16 15:58:42,602 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 [2022-11-16 15:58:42,603 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 15:58:42,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 20 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 15:58:42,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2022-11-16 15:58:42,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 2438. [2022-11-16 15:58:42,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2438 states, 2423 states have (on average 2.6867519603796945) internal successors, (6510), 2437 states have internal predecessors, (6510), 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) [2022-11-16 15:58:42,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2438 states to 2438 states and 6510 transitions. [2022-11-16 15:58:42,686 INFO L78 Accepts]: Start accepts. Automaton has 2438 states and 6510 transitions. Word has length 2 [2022-11-16 15:58:42,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:58:42,687 INFO L495 AbstractCegarLoop]: Abstraction has 2438 states and 6510 transitions. [2022-11-16 15:58:42,687 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) [2022-11-16 15:58:42,687 INFO L276 IsEmpty]: Start isEmpty. Operand 2438 states and 6510 transitions. [2022-11-16 15:58:42,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 15:58:42,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:58:42,688 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 15:58:42,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 15:58:42,688 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 15:58:42,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:58:42,688 INFO L85 PathProgramCache]: Analyzing trace with hash 26092, now seen corresponding path program 1 times [2022-11-16 15:58:42,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:58:42,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830054081] [2022-11-16 15:58:42,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:58:42,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:58:42,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:58:42,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:58:42,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:58:42,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830054081] [2022-11-16 15:58:42,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830054081] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 15:58:42,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 15:58:42,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 15:58:42,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171700173] [2022-11-16 15:58:42,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 15:58:42,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 15:58:42,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:58:42,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 15:58:42,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 15:58:42,797 INFO L87 Difference]: Start difference. First operand 2438 states and 6510 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) [2022-11-16 15:58:42,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:58:42,884 INFO L93 Difference]: Finished difference Result 2432 states and 6503 transitions. [2022-11-16 15:58:42,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 15:58:42,885 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 [2022-11-16 15:58:42,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:58:42,897 INFO L225 Difference]: With dead ends: 2432 [2022-11-16 15:58:42,897 INFO L226 Difference]: Without dead ends: 2432 [2022-11-16 15:58:42,897 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 [2022-11-16 15:58:42,898 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 15:58:42,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 24 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 15:58:42,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2022-11-16 15:58:42,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 2432. [2022-11-16 15:58:42,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2432 states, 2419 states have (on average 2.688300950806118) internal successors, (6503), 2431 states have internal predecessors, (6503), 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) [2022-11-16 15:58:42,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2432 states to 2432 states and 6503 transitions. [2022-11-16 15:58:42,987 INFO L78 Accepts]: Start accepts. Automaton has 2432 states and 6503 transitions. Word has length 2 [2022-11-16 15:58:42,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:58:42,988 INFO L495 AbstractCegarLoop]: Abstraction has 2432 states and 6503 transitions. [2022-11-16 15:58:42,988 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) [2022-11-16 15:58:42,988 INFO L276 IsEmpty]: Start isEmpty. Operand 2432 states and 6503 transitions. [2022-11-16 15:58:42,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 15:58:42,989 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:58:42,989 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 15:58:42,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 15:58:42,989 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 15:58:42,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:58:42,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1655411690, now seen corresponding path program 1 times [2022-11-16 15:58:42,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:58:42,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381587451] [2022-11-16 15:58:42,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:58:42,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:58:43,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:58:43,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:58:43,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:58:43,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381587451] [2022-11-16 15:58:43,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381587451] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:58:43,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179570372] [2022-11-16 15:58:43,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:58:43,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:58:43,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dbc54d-33b4-4af4-9833-fbf8188f3394/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:58:43,163 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dbc54d-33b4-4af4-9833-fbf8188f3394/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:58:43,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dbc54d-33b4-4af4-9833-fbf8188f3394/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 15:58:43,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:58:43,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 15:58:43,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:58:43,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 74 [2022-11-16 15:58:43,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 64 [2022-11-16 15:58:43,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:58:43,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:58:43,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:58:43,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179570372] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 15:58:43,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1492693835] [2022-11-16 15:58:43,381 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 15:58:43,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 15:58:43,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-16 15:58:43,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127319833] [2022-11-16 15:58:43,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 15:58:43,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 15:58:43,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:58:43,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 15:58:43,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 15:58:43,383 INFO L87 Difference]: Start difference. First operand 2432 states and 6503 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:58:43,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:58:43,604 INFO L93 Difference]: Finished difference Result 2216 states and 5945 transitions. [2022-11-16 15:58:43,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 15:58:43,605 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 15:58:43,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:58:43,615 INFO L225 Difference]: With dead ends: 2216 [2022-11-16 15:58:43,616 INFO L226 Difference]: Without dead ends: 2216 [2022-11-16 15:58:43,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-16 15:58:43,616 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 135 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 15:58:43,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 70 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 15:58:43,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2216 states. [2022-11-16 15:58:43,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2216 to 2216. [2022-11-16 15:58:43,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2216 states, 2206 states have (on average 2.6949229374433363) internal successors, (5945), 2215 states have internal predecessors, (5945), 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) [2022-11-16 15:58:43,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2216 states to 2216 states and 5945 transitions. [2022-11-16 15:58:43,681 INFO L78 Accepts]: Start accepts. Automaton has 2216 states and 5945 transitions. Word has length 6 [2022-11-16 15:58:43,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:58:43,682 INFO L495 AbstractCegarLoop]: Abstraction has 2216 states and 5945 transitions. [2022-11-16 15:58:43,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:58:43,682 INFO L276 IsEmpty]: Start isEmpty. Operand 2216 states and 5945 transitions. [2022-11-16 15:58:43,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 15:58:43,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:58:43,683 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-16 15:58:43,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dbc54d-33b4-4af4-9833-fbf8188f3394/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 15:58:43,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dbc54d-33b4-4af4-9833-fbf8188f3394/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 15:58:43,889 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 15:58:43,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:58:43,889 INFO L85 PathProgramCache]: Analyzing trace with hash 691172487, now seen corresponding path program 1 times [2022-11-16 15:58:43,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:58:43,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720114927] [2022-11-16 15:58:43,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:58:43,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:58:43,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 15:58:43,924 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 15:58:43,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 15:58:43,945 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-16 15:58:43,945 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 15:58:43,946 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-16 15:58:43,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-11-16 15:58:43,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-11-16 15:58:43,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-11-16 15:58:43,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-11-16 15:58:43,947 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-11-16 15:58:43,947 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-11-16 15:58:43,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 15:58:43,947 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-16 15:58:43,948 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 15:58:43,948 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-16 15:58:43,974 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-16 15:58:43,978 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 15:58:43,978 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 167 places, 187 transitions, 404 flow [2022-11-16 15:58:43,984 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 167 places, 187 transitions, 404 flow [2022-11-16 15:58:43,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 187 transitions, 404 flow [2022-11-16 15:58:44,083 INFO L130 PetriNetUnfolder]: 51/419 cut-off events. [2022-11-16 15:58:44,083 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-16 15:58:44,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 419 events. 51/419 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1434 event pairs, 1 based on Foata normal form. 0/328 useless extension candidates. Maximal degree in co-relation 281. Up to 16 conditions per place. [2022-11-16 15:58:44,105 INFO L119 LiptonReduction]: Number of co-enabled transitions 14112 [2022-11-16 15:58:49,970 INFO L134 LiptonReduction]: Checked pairs total: 33108 [2022-11-16 15:58:49,970 INFO L136 LiptonReduction]: Total number of compositions: 160 [2022-11-16 15:58:49,971 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 63 places, 79 transitions, 188 flow [2022-11-16 15:58:51,892 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 36581 states, 36536 states have (on average 5.087721699146048) internal successors, (185885), 36580 states have internal predecessors, (185885), 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) [2022-11-16 15:58:51,893 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 15:58:51,894 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;@cafc6f6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 15:58:51,894 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-16 15:58:52,015 INFO L276 IsEmpty]: Start isEmpty. Operand has 36581 states, 36536 states have (on average 5.087721699146048) internal successors, (185885), 36580 states have internal predecessors, (185885), 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) [2022-11-16 15:58:52,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 15:58:52,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:58:52,016 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 15:58:52,018 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 15:58:52,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:58:52,020 INFO L85 PathProgramCache]: Analyzing trace with hash 38157, now seen corresponding path program 1 times [2022-11-16 15:58:52,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:58:52,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527751372] [2022-11-16 15:58:52,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:58:52,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:58:52,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:58:52,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:58:52,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:58:52,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527751372] [2022-11-16 15:58:52,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527751372] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 15:58:52,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 15:58:52,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 15:58:52,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308045624] [2022-11-16 15:58:52,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 15:58:52,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 15:58:52,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:58:52,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 15:58:52,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 15:58:52,215 INFO L87 Difference]: Start difference. First operand has 36581 states, 36536 states have (on average 5.087721699146048) internal successors, (185885), 36580 states have internal predecessors, (185885), 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) [2022-11-16 15:58:53,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:58:53,158 INFO L93 Difference]: Finished difference Result 32499 states and 115523 transitions. [2022-11-16 15:58:53,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 15:58:53,158 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 [2022-11-16 15:58:53,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:58:53,444 INFO L225 Difference]: With dead ends: 32499 [2022-11-16 15:58:53,445 INFO L226 Difference]: Without dead ends: 30302 [2022-11-16 15:58:53,445 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 [2022-11-16 15:58:53,447 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 54 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 15:58:53,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 22 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 15:58:53,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30302 states. [2022-11-16 15:58:55,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30302 to 30302. [2022-11-16 15:58:55,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30302 states, 30277 states have (on average 3.558773986854708) internal successors, (107749), 30301 states have internal predecessors, (107749), 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) [2022-11-16 15:58:55,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30302 states to 30302 states and 107749 transitions. [2022-11-16 15:58:55,802 INFO L78 Accepts]: Start accepts. Automaton has 30302 states and 107749 transitions. Word has length 2 [2022-11-16 15:58:55,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:58:55,803 INFO L495 AbstractCegarLoop]: Abstraction has 30302 states and 107749 transitions. [2022-11-16 15:58:55,803 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) [2022-11-16 15:58:55,803 INFO L276 IsEmpty]: Start isEmpty. Operand 30302 states and 107749 transitions. [2022-11-16 15:58:55,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 15:58:55,803 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:58:55,803 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 15:58:55,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 15:58:55,804 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 15:58:55,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:58:55,804 INFO L85 PathProgramCache]: Analyzing trace with hash 38158, now seen corresponding path program 1 times [2022-11-16 15:58:55,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:58:55,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246028873] [2022-11-16 15:58:55,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:58:55,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:58:55,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:58:55,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:58:55,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:58:55,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246028873] [2022-11-16 15:58:55,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246028873] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 15:58:55,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 15:58:55,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 15:58:55,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535115362] [2022-11-16 15:58:55,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 15:58:55,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 15:58:55,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:58:55,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 15:58:55,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 15:58:55,910 INFO L87 Difference]: Start difference. First operand 30302 states and 107749 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) [2022-11-16 15:58:56,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:58:56,648 INFO L93 Difference]: Finished difference Result 30296 states and 107742 transitions. [2022-11-16 15:58:56,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 15:58:56,663 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 [2022-11-16 15:58:56,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:58:56,926 INFO L225 Difference]: With dead ends: 30296 [2022-11-16 15:58:56,926 INFO L226 Difference]: Without dead ends: 30296 [2022-11-16 15:58:56,926 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 [2022-11-16 15:58:56,928 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 15:58:56,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 26 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 15:58:57,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30296 states. [2022-11-16 15:58:58,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30296 to 30296. [2022-11-16 15:58:58,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30296 states, 30273 states have (on average 3.5590129818650285) internal successors, (107742), 30295 states have internal predecessors, (107742), 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) [2022-11-16 15:58:58,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30296 states to 30296 states and 107742 transitions. [2022-11-16 15:58:58,351 INFO L78 Accepts]: Start accepts. Automaton has 30296 states and 107742 transitions. Word has length 2 [2022-11-16 15:58:58,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:58:58,351 INFO L495 AbstractCegarLoop]: Abstraction has 30296 states and 107742 transitions. [2022-11-16 15:58:58,352 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) [2022-11-16 15:58:58,352 INFO L276 IsEmpty]: Start isEmpty. Operand 30296 states and 107742 transitions. [2022-11-16 15:58:58,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 15:58:58,353 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:58:58,353 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 15:58:58,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 15:58:58,353 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 15:58:58,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:58:58,353 INFO L85 PathProgramCache]: Analyzing trace with hash 908697974, now seen corresponding path program 1 times [2022-11-16 15:58:58,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:58:58,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759754222] [2022-11-16 15:58:58,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:58:58,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:58:58,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:58:58,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:58:58,460 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:58:58,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759754222] [2022-11-16 15:58:58,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759754222] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:58:58,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615648788] [2022-11-16 15:58:58,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:58:58,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:58:58,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dbc54d-33b4-4af4-9833-fbf8188f3394/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:58:58,463 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dbc54d-33b4-4af4-9833-fbf8188f3394/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:58:58,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dbc54d-33b4-4af4-9833-fbf8188f3394/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 15:58:58,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:58:58,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 15:58:58,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:58:58,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 80 [2022-11-16 15:58:58,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 70 [2022-11-16 15:58:58,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:58:58,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:58:58,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:58:58,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615648788] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 15:58:58,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1529042549] [2022-11-16 15:58:58,743 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 15:58:58,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 15:58:58,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-16 15:58:58,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153129978] [2022-11-16 15:58:58,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 15:58:58,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 15:58:58,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:58:58,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 15:58:58,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-16 15:58:58,747 INFO L87 Difference]: Start difference. First operand 30296 states and 107742 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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) [2022-11-16 15:58:59,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:58:59,446 INFO L93 Difference]: Finished difference Result 28908 states and 102188 transitions. [2022-11-16 15:58:59,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 15:58:59,447 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 15:58:59,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:58:59,576 INFO L225 Difference]: With dead ends: 28908 [2022-11-16 15:58:59,577 INFO L226 Difference]: Without dead ends: 28908 [2022-11-16 15:58:59,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-11-16 15:58:59,578 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 217 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 15:58:59,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 64 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 15:58:59,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28908 states. [2022-11-16 15:59:00,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28908 to 28352. [2022-11-16 15:59:00,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28352 states, 28333 states have (on average 3.554300638831045) internal successors, (100704), 28351 states have internal predecessors, (100704), 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) [2022-11-16 15:59:00,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28352 states to 28352 states and 100704 transitions. [2022-11-16 15:59:00,919 INFO L78 Accepts]: Start accepts. Automaton has 28352 states and 100704 transitions. Word has length 6 [2022-11-16 15:59:00,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:59:00,919 INFO L495 AbstractCegarLoop]: Abstraction has 28352 states and 100704 transitions. [2022-11-16 15:59:00,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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) [2022-11-16 15:59:00,920 INFO L276 IsEmpty]: Start isEmpty. Operand 28352 states and 100704 transitions. [2022-11-16 15:59:00,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 15:59:00,921 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:59:00,921 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-16 15:59:00,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dbc54d-33b4-4af4-9833-fbf8188f3394/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-16 15:59:01,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dbc54d-33b4-4af4-9833-fbf8188f3394/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:59:01,123 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 15:59:01,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:59:01,124 INFO L85 PathProgramCache]: Analyzing trace with hash -810268331, now seen corresponding path program 1 times [2022-11-16 15:59:01,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:59:01,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802251073] [2022-11-16 15:59:01,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:59:01,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:59:01,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:59:01,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 15:59:01,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:59:01,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802251073] [2022-11-16 15:59:01,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802251073] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 15:59:01,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 15:59:01,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 15:59:01,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159278475] [2022-11-16 15:59:01,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 15:59:01,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 15:59:01,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:59:01,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 15:59:01,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 15:59:01,186 INFO L87 Difference]: Start difference. First operand 28352 states and 100704 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2022-11-16 15:59:01,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:59:01,551 INFO L93 Difference]: Finished difference Result 40871 states and 142873 transitions. [2022-11-16 15:59:01,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 15:59:01,552 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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 12 [2022-11-16 15:59:01,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:59:02,071 INFO L225 Difference]: With dead ends: 40871 [2022-11-16 15:59:02,071 INFO L226 Difference]: Without dead ends: 40871 [2022-11-16 15:59:02,072 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 [2022-11-16 15:59:02,072 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 15:59:02,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 26 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 15:59:02,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40871 states. [2022-11-16 15:59:02,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40871 to 28202. [2022-11-16 15:59:03,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28202 states, 28183 states have (on average 3.5528155270907993) internal successors, (100129), 28201 states have internal predecessors, (100129), 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) [2022-11-16 15:59:03,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28202 states to 28202 states and 100129 transitions. [2022-11-16 15:59:03,471 INFO L78 Accepts]: Start accepts. Automaton has 28202 states and 100129 transitions. Word has length 12 [2022-11-16 15:59:03,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:59:03,472 INFO L495 AbstractCegarLoop]: Abstraction has 28202 states and 100129 transitions. [2022-11-16 15:59:03,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2022-11-16 15:59:03,472 INFO L276 IsEmpty]: Start isEmpty. Operand 28202 states and 100129 transitions. [2022-11-16 15:59:03,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 15:59:03,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:59:03,475 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:59:03,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 15:59:03,476 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 15:59:03,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:59:03,476 INFO L85 PathProgramCache]: Analyzing trace with hash -986269051, now seen corresponding path program 1 times [2022-11-16 15:59:03,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:59:03,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662974339] [2022-11-16 15:59:03,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:59:03,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:59:03,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:59:03,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 15:59:03,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:59:03,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662974339] [2022-11-16 15:59:03,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662974339] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 15:59:03,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 15:59:03,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 15:59:03,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826007157] [2022-11-16 15:59:03,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 15:59:03,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 15:59:03,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:59:03,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 15:59:03,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 15:59:03,666 INFO L87 Difference]: Start difference. First operand 28202 states and 100129 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:59:04,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:59:04,077 INFO L93 Difference]: Finished difference Result 25082 states and 87957 transitions. [2022-11-16 15:59:04,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 15:59:04,077 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 15:59:04,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:59:04,168 INFO L225 Difference]: With dead ends: 25082 [2022-11-16 15:59:04,168 INFO L226 Difference]: Without dead ends: 25082 [2022-11-16 15:59:04,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-11-16 15:59:04,169 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 250 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 15:59:04,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 73 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 15:59:04,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25082 states. [2022-11-16 15:59:05,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25082 to 24890. [2022-11-16 15:59:05,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24890 states, 24873 states have (on average 3.5209665098701404) internal successors, (87577), 24889 states have internal predecessors, (87577), 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) [2022-11-16 15:59:05,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24890 states to 24890 states and 87577 transitions. [2022-11-16 15:59:05,118 INFO L78 Accepts]: Start accepts. Automaton has 24890 states and 87577 transitions. Word has length 15 [2022-11-16 15:59:05,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:59:05,118 INFO L495 AbstractCegarLoop]: Abstraction has 24890 states and 87577 transitions. [2022-11-16 15:59:05,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:59:05,118 INFO L276 IsEmpty]: Start isEmpty. Operand 24890 states and 87577 transitions. [2022-11-16 15:59:05,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 15:59:05,120 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:59:05,120 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-16 15:59:05,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 15:59:05,121 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 15:59:05,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:59:05,121 INFO L85 PathProgramCache]: Analyzing trace with hash -509866972, now seen corresponding path program 1 times [2022-11-16 15:59:05,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:59:05,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680025531] [2022-11-16 15:59:05,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:59:05,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:59:05,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 15:59:05,140 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 15:59:05,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 15:59:05,156 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-16 15:59:05,157 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 15:59:05,157 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-16 15:59:05,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-11-16 15:59:05,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-11-16 15:59:05,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-11-16 15:59:05,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-11-16 15:59:05,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-11-16 15:59:05,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-11-16 15:59:05,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 15:59:05,159 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-16 15:59:05,159 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 15:59:05,159 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-16 15:59:05,183 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-16 15:59:05,185 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 15:59:05,186 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 192 places, 217 transitions, 478 flow [2022-11-16 15:59:05,186 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 192 places, 217 transitions, 478 flow [2022-11-16 15:59:05,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 217 transitions, 478 flow [2022-11-16 15:59:05,302 INFO L130 PetriNetUnfolder]: 82/653 cut-off events. [2022-11-16 15:59:05,303 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-16 15:59:05,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 708 conditions, 653 events. 82/653 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2690 event pairs, 6 based on Foata normal form. 0/508 useless extension candidates. Maximal degree in co-relation 439. Up to 32 conditions per place. [2022-11-16 15:59:05,335 INFO L119 LiptonReduction]: Number of co-enabled transitions 22288 [2022-11-16 15:59:11,351 INFO L134 LiptonReduction]: Checked pairs total: 54868 [2022-11-16 15:59:11,352 INFO L136 LiptonReduction]: Total number of compositions: 180 [2022-11-16 15:59:11,353 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 77 places, 98 transitions, 240 flow [2022-11-16 15:59:30,405 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 456581 states, 456501 states have (on average 6.439420724160517) internal successors, (2939602), 456580 states have internal predecessors, (2939602), 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) [2022-11-16 15:59:30,408 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 15:59:30,413 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;@cafc6f6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 15:59:30,413 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-16 15:59:31,139 INFO L276 IsEmpty]: Start isEmpty. Operand has 456581 states, 456501 states have (on average 6.439420724160517) internal successors, (2939602), 456580 states have internal predecessors, (2939602), 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) [2022-11-16 15:59:31,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 15:59:31,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:59:31,140 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 15:59:31,140 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-16 15:59:31,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:59:31,141 INFO L85 PathProgramCache]: Analyzing trace with hash 51816, now seen corresponding path program 1 times [2022-11-16 15:59:31,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:59:31,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871375052] [2022-11-16 15:59:31,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:59:31,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:59:31,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:59:31,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:59:31,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:59:31,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871375052] [2022-11-16 15:59:31,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871375052] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 15:59:31,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 15:59:31,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 15:59:31,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499576079] [2022-11-16 15:59:31,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 15:59:31,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 15:59:31,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:59:31,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 15:59:31,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 15:59:31,920 INFO L87 Difference]: Start difference. First operand has 456581 states, 456501 states have (on average 6.439420724160517) internal successors, (2939602), 456580 states have internal predecessors, (2939602), 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)