./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d215b7-dead-42d5-99ea-c1e7378412dd/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d215b7-dead-42d5-99ea-c1e7378412dd/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d215b7-dead-42d5-99ea-c1e7378412dd/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d215b7-dead-42d5-99ea-c1e7378412dd/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d215b7-dead-42d5-99ea-c1e7378412dd/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d215b7-dead-42d5-99ea-c1e7378412dd/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e7fe0631e7f950e2868c8cb954edca4f6de3fdffbf6debba58771511fbac2e8b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 15:55:31,245 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:55:31,248 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:55:31,269 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:55:31,269 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:55:31,270 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:55:31,272 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:55:31,273 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:55:31,275 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:55:31,276 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:55:31,277 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:55:31,278 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:55:31,278 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:55:31,279 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:55:31,280 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:55:31,281 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:55:31,282 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:55:31,283 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:55:31,285 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:55:31,286 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:55:31,288 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:55:31,289 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:55:31,290 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:55:31,291 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:55:31,294 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:55:31,294 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:55:31,295 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:55:31,295 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:55:31,296 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:55:31,297 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:55:31,297 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:55:31,298 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:55:31,299 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:55:31,300 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:55:31,301 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:55:31,301 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:55:31,302 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:55:31,302 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:55:31,302 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:55:31,303 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:55:31,304 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:55:31,305 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d215b7-dead-42d5-99ea-c1e7378412dd/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-23 15:55:31,326 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:55:31,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:55:31,327 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:55:31,328 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:55:31,328 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:55:31,329 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:55:31,329 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:55:31,329 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:55:31,329 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:55:31,330 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:55:31,330 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:55:31,330 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:55:31,330 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:55:31,331 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:55:31,331 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:55:31,331 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:55:31,332 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:55:31,332 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:55:31,332 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 15:55:31,333 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 15:55:31,333 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:55:31,333 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:55:31,334 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 15:55:31,334 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:55:31,334 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:55:31,334 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:55:31,335 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 15:55:31,335 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 15:55:31,335 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 15:55:31,335 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:55:31,336 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 15:55:31,336 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:55:31,336 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:55:31,336 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:55:31,337 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:55:31,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:55:31,337 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:55:31,338 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:55:31,338 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:55:31,338 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:55:31,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:55:31,339 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:55:31,339 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_16d215b7-dead-42d5-99ea-c1e7378412dd/bin/utaipan-Q6hlc19bkW/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d215b7-dead-42d5-99ea-c1e7378412dd/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e7fe0631e7f950e2868c8cb954edca4f6de3fdffbf6debba58771511fbac2e8b [2022-11-23 15:55:31,584 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:55:31,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:55:31,610 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:55:31,612 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:55:31,612 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:55:31,613 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d215b7-dead-42d5-99ea-c1e7378412dd/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i [2022-11-23 15:55:34,798 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:55:35,055 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:55:35,055 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d215b7-dead-42d5-99ea-c1e7378412dd/sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i [2022-11-23 15:55:35,069 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d215b7-dead-42d5-99ea-c1e7378412dd/bin/utaipan-Q6hlc19bkW/data/7e0b890ab/d8cb90725296410fa918fd147378f2e9/FLAGf60dc38ec [2022-11-23 15:55:35,096 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d215b7-dead-42d5-99ea-c1e7378412dd/bin/utaipan-Q6hlc19bkW/data/7e0b890ab/d8cb90725296410fa918fd147378f2e9 [2022-11-23 15:55:35,098 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:55:35,100 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:55:35,101 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:55:35,101 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:55:35,109 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:55:35,110 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:55:35" (1/1) ... [2022-11-23 15:55:35,111 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bc8611 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:55:35, skipping insertion in model container [2022-11-23 15:55:35,112 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:55:35" (1/1) ... [2022-11-23 15:55:35,119 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:55:35,158 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:55:35,493 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d215b7-dead-42d5-99ea-c1e7378412dd/sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i[30687,30700] [2022-11-23 15:55:35,503 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:55:35,517 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:55:35,591 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d215b7-dead-42d5-99ea-c1e7378412dd/sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i[30687,30700] [2022-11-23 15:55:35,593 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:55:35,631 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:55:35,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:55:35 WrapperNode [2022-11-23 15:55:35,632 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:55:35,633 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:55:35,633 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:55:35,633 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:55:35,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:55:35" (1/1) ... [2022-11-23 15:55:35,654 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:55:35" (1/1) ... [2022-11-23 15:55:35,677 INFO L138 Inliner]: procedures = 170, calls = 35, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 104 [2022-11-23 15:55:35,678 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:55:35,678 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:55:35,679 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:55:35,679 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:55:35,687 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:55:35" (1/1) ... [2022-11-23 15:55:35,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:55:35" (1/1) ... [2022-11-23 15:55:35,691 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:55:35" (1/1) ... [2022-11-23 15:55:35,691 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:55:35" (1/1) ... [2022-11-23 15:55:35,697 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:55:35" (1/1) ... [2022-11-23 15:55:35,701 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:55:35" (1/1) ... [2022-11-23 15:55:35,703 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:55:35" (1/1) ... [2022-11-23 15:55:35,704 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:55:35" (1/1) ... [2022-11-23 15:55:35,707 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:55:35,708 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:55:35,708 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:55:35,708 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:55:35,709 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:55:35" (1/1) ... [2022-11-23 15:55:35,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:55:35,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d215b7-dead-42d5-99ea-c1e7378412dd/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:55:35,740 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d215b7-dead-42d5-99ea-c1e7378412dd/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:55:35,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d215b7-dead-42d5-99ea-c1e7378412dd/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:55:35,793 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 15:55:35,793 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-23 15:55:35,794 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-23 15:55:35,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 15:55:35,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:55:35,795 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 15:55:35,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:55:35,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:55:35,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:55:35,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:55:35,797 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 15:55:36,040 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:55:36,042 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:55:36,482 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:55:36,643 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:55:36,644 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-23 15:55:36,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:55:36 BoogieIcfgContainer [2022-11-23 15:55:36,646 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:55:36,649 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:55:36,649 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:55:36,652 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:55:36,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:55:35" (1/3) ... [2022-11-23 15:55:36,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64b69dd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:55:36, skipping insertion in model container [2022-11-23 15:55:36,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:55:35" (2/3) ... [2022-11-23 15:55:36,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64b69dd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:55:36, skipping insertion in model container [2022-11-23 15:55:36,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:55:36" (3/3) ... [2022-11-23 15:55:36,655 INFO L112 eAbstractionObserver]: Analyzing ICFG 36_stack_cas_p0_vs_concur.i [2022-11-23 15:55:36,678 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:55:36,679 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2022-11-23 15:55:36,679 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 15:55:36,776 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 15:55:36,809 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 15:55:36,823 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 127 places, 133 transitions, 271 flow [2022-11-23 15:55:36,826 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 127 places, 133 transitions, 271 flow [2022-11-23 15:55:36,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 133 transitions, 271 flow [2022-11-23 15:55:36,890 INFO L130 PetriNetUnfolder]: 10/149 cut-off events. [2022-11-23 15:55:36,890 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 15:55:36,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 149 events. 10/149 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 316 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 112. Up to 4 conditions per place. [2022-11-23 15:55:36,905 INFO L119 LiptonReduction]: Number of co-enabled transitions 3572 [2022-11-23 15:55:42,052 INFO L134 LiptonReduction]: Checked pairs total: 7254 [2022-11-23 15:55:42,052 INFO L136 LiptonReduction]: Total number of compositions: 157 [2022-11-23 15:55:42,064 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 55 places, 55 transitions, 115 flow [2022-11-23 15:55:42,110 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 357 states, 205 states have (on average 3.317073170731707) internal successors, (680), 356 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:55:42,143 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:55:42,151 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;@427eb2dd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:55:42,152 INFO L358 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2022-11-23 15:55:42,157 INFO L276 IsEmpty]: Start isEmpty. Operand has 357 states, 205 states have (on average 3.317073170731707) internal successors, (680), 356 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:55:42,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-23 15:55:42,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:55:42,162 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-23 15:55:42,163 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2022-11-23 15:55:42,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:55:42,170 INFO L85 PathProgramCache]: Analyzing trace with hash 20962, now seen corresponding path program 1 times [2022-11-23 15:55:42,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:55:42,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125644110] [2022-11-23 15:55:42,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:55:42,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:55:42,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:55:42,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:55:42,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:55:42,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125644110] [2022-11-23 15:55:42,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125644110] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:55:42,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:55:42,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 15:55:42,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784629327] [2022-11-23 15:55:42,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:55:42,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:55:42,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:55:42,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:55:42,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:55:42,482 INFO L87 Difference]: Start difference. First operand has 357 states, 205 states have (on average 3.317073170731707) internal successors, (680), 356 states have internal predecessors, (680), 0 states have call successors, (0), 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) [2022-11-23 15:55:42,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:55:42,595 INFO L93 Difference]: Finished difference Result 169 states and 306 transitions. [2022-11-23 15:55:42,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:55:42,597 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 [2022-11-23 15:55:42,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:55:42,606 INFO L225 Difference]: With dead ends: 169 [2022-11-23 15:55:42,606 INFO L226 Difference]: Without dead ends: 169 [2022-11-23 15:55:42,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:55:42,610 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:55:42,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 4 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:55:42,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-23 15:55:42,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-11-23 15:55:42,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 130 states have (on average 2.353846153846154) internal successors, (306), 168 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:55:42,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 306 transitions. [2022-11-23 15:55:42,669 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 306 transitions. Word has length 2 [2022-11-23 15:55:42,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:55:42,669 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 306 transitions. [2022-11-23 15:55:42,669 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) [2022-11-23 15:55:42,670 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 306 transitions. [2022-11-23 15:55:42,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-23 15:55:42,670 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:55:42,670 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-23 15:55:42,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:55:42,671 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2022-11-23 15:55:42,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:55:42,672 INFO L85 PathProgramCache]: Analyzing trace with hash 20963, now seen corresponding path program 1 times [2022-11-23 15:55:42,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:55:42,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096207811] [2022-11-23 15:55:42,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:55:42,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:55:42,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:55:42,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:55:42,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:55:42,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096207811] [2022-11-23 15:55:42,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096207811] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:55:42,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:55:42,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 15:55:42,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743661437] [2022-11-23 15:55:42,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:55:42,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:55:42,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:55:42,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:55:42,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:55:42,771 INFO L87 Difference]: Start difference. First operand 169 states and 306 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) [2022-11-23 15:55:42,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:55:42,958 INFO L93 Difference]: Finished difference Result 285 states and 511 transitions. [2022-11-23 15:55:42,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:55:42,959 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 [2022-11-23 15:55:42,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:55:42,967 INFO L225 Difference]: With dead ends: 285 [2022-11-23 15:55:42,967 INFO L226 Difference]: Without dead ends: 285 [2022-11-23 15:55:42,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:55:42,969 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 30 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:55:42,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 7 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:55:42,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-11-23 15:55:42,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 221. [2022-11-23 15:55:42,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 183 states have (on average 2.2568306010928962) internal successors, (413), 220 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:55:42,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 413 transitions. [2022-11-23 15:55:42,998 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 413 transitions. Word has length 2 [2022-11-23 15:55:42,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:55:42,999 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 413 transitions. [2022-11-23 15:55:42,999 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) [2022-11-23 15:55:42,999 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 413 transitions. [2022-11-23 15:55:43,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 15:55:43,000 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:55:43,000 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 15:55:43,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:55:43,001 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2022-11-23 15:55:43,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:55:43,002 INFO L85 PathProgramCache]: Analyzing trace with hash -2102223197, now seen corresponding path program 1 times [2022-11-23 15:55:43,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:55:43,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421883595] [2022-11-23 15:55:43,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:55:43,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:55:43,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:55:43,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:55:43,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:55:43,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421883595] [2022-11-23 15:55:43,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421883595] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:55:43,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:55:43,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:55:43,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167567951] [2022-11-23 15:55:43,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:55:43,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:55:43,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:55:43,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:55:43,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:55:43,241 INFO L87 Difference]: Start difference. First operand 221 states and 413 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:55:43,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:55:43,333 INFO L93 Difference]: Finished difference Result 179 states and 335 transitions. [2022-11-23 15:55:43,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:55:43,334 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-23 15:55:43,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:55:43,336 INFO L225 Difference]: With dead ends: 179 [2022-11-23 15:55:43,336 INFO L226 Difference]: Without dead ends: 179 [2022-11-23 15:55:43,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:55:43,340 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 23 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:55:43,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 7 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:55:43,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-11-23 15:55:43,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2022-11-23 15:55:43,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 153 states have (on average 2.189542483660131) internal successors, (335), 178 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:55:43,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 335 transitions. [2022-11-23 15:55:43,370 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 335 transitions. Word has length 6 [2022-11-23 15:55:43,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:55:43,371 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 335 transitions. [2022-11-23 15:55:43,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:55:43,374 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 335 transitions. [2022-11-23 15:55:43,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 15:55:43,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:55:43,375 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-23 15:55:43,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:55:43,378 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2022-11-23 15:55:43,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:55:43,378 INFO L85 PathProgramCache]: Analyzing trace with hash -2102107960, now seen corresponding path program 1 times [2022-11-23 15:55:43,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:55:43,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910915766] [2022-11-23 15:55:43,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:55:43,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:55:43,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 15:55:43,401 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 15:55:43,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 15:55:43,431 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-23 15:55:43,432 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 15:55:43,433 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (61 of 62 remaining) [2022-11-23 15:55:43,438 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 62 remaining) [2022-11-23 15:55:43,439 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 62 remaining) [2022-11-23 15:55:43,440 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 62 remaining) [2022-11-23 15:55:43,441 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 62 remaining) [2022-11-23 15:55:43,441 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 62 remaining) [2022-11-23 15:55:43,442 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 62 remaining) [2022-11-23 15:55:43,442 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 62 remaining) [2022-11-23 15:55:43,442 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 62 remaining) [2022-11-23 15:55:43,442 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (52 of 62 remaining) [2022-11-23 15:55:43,443 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 62 remaining) [2022-11-23 15:55:43,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 62 remaining) [2022-11-23 15:55:43,444 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 62 remaining) [2022-11-23 15:55:43,445 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 62 remaining) [2022-11-23 15:55:43,445 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13ASSERT_VIOLATIONARRAY_INDEX (47 of 62 remaining) [2022-11-23 15:55:43,445 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 62 remaining) [2022-11-23 15:55:43,445 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 62 remaining) [2022-11-23 15:55:43,446 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 62 remaining) [2022-11-23 15:55:43,446 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 62 remaining) [2022-11-23 15:55:43,446 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28ASSERT_VIOLATIONMEMORY_LEAK (42 of 62 remaining) [2022-11-23 15:55:43,446 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 62 remaining) [2022-11-23 15:55:43,446 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 62 remaining) [2022-11-23 15:55:43,447 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 62 remaining) [2022-11-23 15:55:43,447 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 62 remaining) [2022-11-23 15:55:43,447 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 62 remaining) [2022-11-23 15:55:43,447 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 62 remaining) [2022-11-23 15:55:43,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 62 remaining) [2022-11-23 15:55:43,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 62 remaining) [2022-11-23 15:55:43,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 62 remaining) [2022-11-23 15:55:43,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 62 remaining) [2022-11-23 15:55:43,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (31 of 62 remaining) [2022-11-23 15:55:43,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 62 remaining) [2022-11-23 15:55:43,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 62 remaining) [2022-11-23 15:55:43,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 62 remaining) [2022-11-23 15:55:43,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 62 remaining) [2022-11-23 15:55:43,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 62 remaining) [2022-11-23 15:55:43,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 62 remaining) [2022-11-23 15:55:43,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 62 remaining) [2022-11-23 15:55:43,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 62 remaining) [2022-11-23 15:55:43,451 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 62 remaining) [2022-11-23 15:55:43,452 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 62 remaining) [2022-11-23 15:55:43,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (20 of 62 remaining) [2022-11-23 15:55:43,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 62 remaining) [2022-11-23 15:55:43,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 62 remaining) [2022-11-23 15:55:43,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 62 remaining) [2022-11-23 15:55:43,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 62 remaining) [2022-11-23 15:55:43,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13ASSERT_VIOLATIONARRAY_INDEX (15 of 62 remaining) [2022-11-23 15:55:43,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 62 remaining) [2022-11-23 15:55:43,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 62 remaining) [2022-11-23 15:55:43,460 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 62 remaining) [2022-11-23 15:55:43,460 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 62 remaining) [2022-11-23 15:55:43,460 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28ASSERT_VIOLATIONMEMORY_LEAK (10 of 62 remaining) [2022-11-23 15:55:43,461 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 62 remaining) [2022-11-23 15:55:43,461 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 62 remaining) [2022-11-23 15:55:43,461 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 62 remaining) [2022-11-23 15:55:43,461 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 62 remaining) [2022-11-23 15:55:43,462 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 62 remaining) [2022-11-23 15:55:43,462 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 62 remaining) [2022-11-23 15:55:43,462 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 62 remaining) [2022-11-23 15:55:43,462 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 62 remaining) [2022-11-23 15:55:43,463 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 62 remaining) [2022-11-23 15:55:43,463 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 62 remaining) [2022-11-23 15:55:43,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 15:55:43,465 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-23 15:55:43,468 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 15:55:43,468 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-23 15:55:43,563 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 15:55:43,574 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 15:55:43,575 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 216 places, 228 transitions, 468 flow [2022-11-23 15:55:43,575 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 216 places, 228 transitions, 468 flow [2022-11-23 15:55:43,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 216 places, 228 transitions, 468 flow [2022-11-23 15:55:43,687 INFO L130 PetriNetUnfolder]: 19/262 cut-off events. [2022-11-23 15:55:43,687 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 15:55:43,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 262 events. 19/262 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 899 event pairs, 0 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 206. Up to 6 conditions per place. [2022-11-23 15:55:43,709 INFO L119 LiptonReduction]: Number of co-enabled transitions 25004 [2022-11-23 15:55:58,906 INFO L134 LiptonReduction]: Checked pairs total: 93128 [2022-11-23 15:55:58,906 INFO L136 LiptonReduction]: Total number of compositions: 184 [2022-11-23 15:55:58,907 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 106 places, 108 transitions, 228 flow [2022-11-23 15:55:59,540 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 19416 states, 14795 states have (on average 3.909901993916864) internal successors, (57847), 19415 states have internal predecessors, (57847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:55:59,542 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:55:59,543 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;@427eb2dd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:55:59,544 INFO L358 AbstractCegarLoop]: Starting to check reachability of 91 error locations. [2022-11-23 15:55:59,584 INFO L276 IsEmpty]: Start isEmpty. Operand has 19416 states, 14795 states have (on average 3.909901993916864) internal successors, (57847), 19415 states have internal predecessors, (57847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:55:59,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-23 15:55:59,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:55:59,584 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-23 15:55:59,585 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2022-11-23 15:55:59,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:55:59,586 INFO L85 PathProgramCache]: Analyzing trace with hash 37426, now seen corresponding path program 1 times [2022-11-23 15:55:59,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:55:59,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007401579] [2022-11-23 15:55:59,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:55:59,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:55:59,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:55:59,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:55:59,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:55:59,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007401579] [2022-11-23 15:55:59,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007401579] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:55:59,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:55:59,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 15:55:59,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670398808] [2022-11-23 15:55:59,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:55:59,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:55:59,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:55:59,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:55:59,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:55:59,801 INFO L87 Difference]: Start difference. First operand has 19416 states, 14795 states have (on average 3.909901993916864) internal successors, (57847), 19415 states have internal predecessors, (57847), 0 states have call successors, (0), 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) [2022-11-23 15:56:00,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:56:00,142 INFO L93 Difference]: Finished difference Result 11313 states and 32388 transitions. [2022-11-23 15:56:00,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:56:00,142 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 [2022-11-23 15:56:00,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:56:00,222 INFO L225 Difference]: With dead ends: 11313 [2022-11-23 15:56:00,222 INFO L226 Difference]: Without dead ends: 11313 [2022-11-23 15:56:00,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:56:00,225 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 91 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:56:00,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 15 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:56:00,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11313 states. [2022-11-23 15:56:00,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11313 to 11313. [2022-11-23 15:56:00,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11313 states, 9827 states have (on average 3.295817645263051) internal successors, (32388), 11312 states have internal predecessors, (32388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:56:00,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11313 states to 11313 states and 32388 transitions. [2022-11-23 15:56:00,804 INFO L78 Accepts]: Start accepts. Automaton has 11313 states and 32388 transitions. Word has length 2 [2022-11-23 15:56:00,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:56:00,805 INFO L495 AbstractCegarLoop]: Abstraction has 11313 states and 32388 transitions. [2022-11-23 15:56:00,805 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) [2022-11-23 15:56:00,805 INFO L276 IsEmpty]: Start isEmpty. Operand 11313 states and 32388 transitions. [2022-11-23 15:56:00,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-23 15:56:00,806 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:56:00,806 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-23 15:56:00,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 15:56:00,807 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2022-11-23 15:56:00,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:56:00,807 INFO L85 PathProgramCache]: Analyzing trace with hash 37427, now seen corresponding path program 1 times [2022-11-23 15:56:00,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:56:00,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236588642] [2022-11-23 15:56:00,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:56:00,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:56:00,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:56:00,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:56:00,858 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:56:00,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236588642] [2022-11-23 15:56:00,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236588642] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:56:00,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:56:00,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 15:56:00,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938741507] [2022-11-23 15:56:00,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:56:00,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:56:00,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:56:00,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:56:00,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:56:00,861 INFO L87 Difference]: Start difference. First operand 11313 states and 32388 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) [2022-11-23 15:56:01,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:56:01,538 INFO L93 Difference]: Finished difference Result 20058 states and 57044 transitions. [2022-11-23 15:56:01,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:56:01,539 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 [2022-11-23 15:56:01,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:56:01,666 INFO L225 Difference]: With dead ends: 20058 [2022-11-23 15:56:01,666 INFO L226 Difference]: Without dead ends: 20058 [2022-11-23 15:56:01,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:56:01,667 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 86 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:56:01,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 34 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:56:01,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20058 states. [2022-11-23 15:56:02,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20058 to 16362. [2022-11-23 15:56:02,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16362 states, 14877 states have (on average 3.2017207770383815) internal successors, (47632), 16361 states have internal predecessors, (47632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:56:02,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16362 states to 16362 states and 47632 transitions. [2022-11-23 15:56:02,654 INFO L78 Accepts]: Start accepts. Automaton has 16362 states and 47632 transitions. Word has length 2 [2022-11-23 15:56:02,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:56:02,654 INFO L495 AbstractCegarLoop]: Abstraction has 16362 states and 47632 transitions. [2022-11-23 15:56:02,655 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) [2022-11-23 15:56:02,655 INFO L276 IsEmpty]: Start isEmpty. Operand 16362 states and 47632 transitions. [2022-11-23 15:56:02,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 15:56:02,655 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:56:02,656 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:56:02,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 15:56:02,656 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2022-11-23 15:56:02,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:56:02,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1297461875, now seen corresponding path program 1 times [2022-11-23 15:56:02,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:56:02,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363336525] [2022-11-23 15:56:02,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:56:02,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:56:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:56:02,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:56:02,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:56:02,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363336525] [2022-11-23 15:56:02,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363336525] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:56:02,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:56:02,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 15:56:02,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756944765] [2022-11-23 15:56:02,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:56:02,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:56:02,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:56:02,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:56:02,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:56:02,847 INFO L87 Difference]: Start difference. First operand 16362 states and 47632 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:56:03,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:56:03,379 INFO L93 Difference]: Finished difference Result 16515 states and 48057 transitions. [2022-11-23 15:56:03,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:56:03,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-23 15:56:03,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:56:03,484 INFO L225 Difference]: With dead ends: 16515 [2022-11-23 15:56:03,484 INFO L226 Difference]: Without dead ends: 16515 [2022-11-23 15:56:03,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:56:03,485 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 11 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:56:03,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 58 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:56:03,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16515 states. [2022-11-23 15:56:04,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16515 to 16495. [2022-11-23 15:56:04,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16495 states, 15010 states have (on average 3.200599600266489) internal successors, (48041), 16494 states have internal predecessors, (48041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:56:04,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16495 states to 16495 states and 48041 transitions. [2022-11-23 15:56:04,358 INFO L78 Accepts]: Start accepts. Automaton has 16495 states and 48041 transitions. Word has length 7 [2022-11-23 15:56:04,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:56:04,359 INFO L495 AbstractCegarLoop]: Abstraction has 16495 states and 48041 transitions. [2022-11-23 15:56:04,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:56:04,359 INFO L276 IsEmpty]: Start isEmpty. Operand 16495 states and 48041 transitions. [2022-11-23 15:56:04,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 15:56:04,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:56:04,360 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:56:04,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 15:56:04,361 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2022-11-23 15:56:04,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:56:04,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1297461878, now seen corresponding path program 1 times [2022-11-23 15:56:04,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:56:04,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627263882] [2022-11-23 15:56:04,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:56:04,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:56:04,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:56:04,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:56:04,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:56:04,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627263882] [2022-11-23 15:56:04,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627263882] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:56:04,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:56:04,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:56:04,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535445058] [2022-11-23 15:56:04,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:56:04,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:56:04,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:56:04,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:56:04,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:56:04,498 INFO L87 Difference]: Start difference. First operand 16495 states and 48041 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:56:05,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:56:05,243 INFO L93 Difference]: Finished difference Result 23263 states and 67541 transitions. [2022-11-23 15:56:05,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:56:05,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-23 15:56:05,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:56:05,398 INFO L225 Difference]: With dead ends: 23263 [2022-11-23 15:56:05,398 INFO L226 Difference]: Without dead ends: 23263 [2022-11-23 15:56:05,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:56:05,400 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 75 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:56:05,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 44 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 15:56:05,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23263 states. [2022-11-23 15:56:06,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23263 to 18475. [2022-11-23 15:56:06,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18475 states, 16996 states have (on average 3.4359261002588846) internal successors, (58397), 18474 states have internal predecessors, (58397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:56:06,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18475 states to 18475 states and 58397 transitions. [2022-11-23 15:56:06,201 INFO L78 Accepts]: Start accepts. Automaton has 18475 states and 58397 transitions. Word has length 7 [2022-11-23 15:56:06,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:56:06,201 INFO L495 AbstractCegarLoop]: Abstraction has 18475 states and 58397 transitions. [2022-11-23 15:56:06,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:56:06,201 INFO L276 IsEmpty]: Start isEmpty. Operand 18475 states and 58397 transitions. [2022-11-23 15:56:06,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 15:56:06,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:56:06,202 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:56:06,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 15:56:06,203 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2022-11-23 15:56:06,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:56:06,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1297461877, now seen corresponding path program 1 times [2022-11-23 15:56:06,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:56:06,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569762660] [2022-11-23 15:56:06,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:56:06,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:56:06,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:56:06,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:56:06,480 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:56:06,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569762660] [2022-11-23 15:56:06,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569762660] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:56:06,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:56:06,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:56:06,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628744809] [2022-11-23 15:56:06,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:56:06,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:56:06,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:56:06,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:56:06,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:56:06,483 INFO L87 Difference]: Start difference. First operand 18475 states and 58397 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:56:07,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:56:07,057 INFO L93 Difference]: Finished difference Result 16171 states and 50213 transitions. [2022-11-23 15:56:07,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:56:07,057 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-23 15:56:07,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:56:07,201 INFO L225 Difference]: With dead ends: 16171 [2022-11-23 15:56:07,201 INFO L226 Difference]: Without dead ends: 16171 [2022-11-23 15:56:07,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:56:07,203 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 78 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:56:07,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 40 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:56:07,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16171 states. [2022-11-23 15:56:07,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16171 to 16137. [2022-11-23 15:56:07,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16137 states, 14988 states have (on average 3.346210301574593) internal successors, (50153), 16136 states have internal predecessors, (50153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:56:07,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16137 states to 16137 states and 50153 transitions. [2022-11-23 15:56:07,778 INFO L78 Accepts]: Start accepts. Automaton has 16137 states and 50153 transitions. Word has length 7 [2022-11-23 15:56:07,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:56:07,779 INFO L495 AbstractCegarLoop]: Abstraction has 16137 states and 50153 transitions. [2022-11-23 15:56:07,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:56:07,779 INFO L276 IsEmpty]: Start isEmpty. Operand 16137 states and 50153 transitions. [2022-11-23 15:56:07,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 15:56:07,780 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:56:07,780 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:56:07,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 15:56:07,781 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err8ASSERT_VIOLATIONARRAY_INDEX === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2022-11-23 15:56:07,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:56:07,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1320308850, now seen corresponding path program 1 times [2022-11-23 15:56:07,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:56:07,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758194568] [2022-11-23 15:56:07,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:56:07,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:56:07,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:56:07,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:56:07,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:56:07,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758194568] [2022-11-23 15:56:07,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758194568] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:56:07,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:56:07,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:56:07,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493400406] [2022-11-23 15:56:07,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:56:07,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:56:07,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:56:07,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:56:07,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:56:07,973 INFO L87 Difference]: Start difference. First operand 16137 states and 50153 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:56:08,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:56:08,511 INFO L93 Difference]: Finished difference Result 16775 states and 51957 transitions. [2022-11-23 15:56:08,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:56:08,511 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-23 15:56:08,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:56:08,593 INFO L225 Difference]: With dead ends: 16775 [2022-11-23 15:56:08,593 INFO L226 Difference]: Without dead ends: 16775 [2022-11-23 15:56:08,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:56:08,594 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 32 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:56:08,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 76 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 15:56:08,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16775 states. [2022-11-23 15:56:09,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16775 to 16379. [2022-11-23 15:56:09,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16379 states, 15230 states have (on average 3.3405778069599474) internal successors, (50877), 16378 states have internal predecessors, (50877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:56:09,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16379 states to 16379 states and 50877 transitions. [2022-11-23 15:56:09,360 INFO L78 Accepts]: Start accepts. Automaton has 16379 states and 50877 transitions. Word has length 9 [2022-11-23 15:56:09,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:56:09,360 INFO L495 AbstractCegarLoop]: Abstraction has 16379 states and 50877 transitions. [2022-11-23 15:56:09,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:56:09,361 INFO L276 IsEmpty]: Start isEmpty. Operand 16379 states and 50877 transitions. [2022-11-23 15:56:09,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 15:56:09,363 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:56:09,364 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:56:09,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 15:56:09,364 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2022-11-23 15:56:09,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:56:09,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1801420281, now seen corresponding path program 1 times [2022-11-23 15:56:09,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:56:09,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402324461] [2022-11-23 15:56:09,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:56:09,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:56:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:56:10,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:56:10,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:56:10,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402324461] [2022-11-23 15:56:10,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402324461] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:56:10,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:56:10,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 15:56:10,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027490245] [2022-11-23 15:56:10,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:56:10,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 15:56:10,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:56:10,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 15:56:10,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:56:10,071 INFO L87 Difference]: Start difference. First operand 16379 states and 50877 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:56:10,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:56:10,852 INFO L93 Difference]: Finished difference Result 17303 states and 51986 transitions. [2022-11-23 15:56:10,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:56:10,853 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-23 15:56:10,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:56:10,924 INFO L225 Difference]: With dead ends: 17303 [2022-11-23 15:56:10,924 INFO L226 Difference]: Without dead ends: 17303 [2022-11-23 15:56:10,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:56:10,925 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 82 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:56:10,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 67 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 15:56:10,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17303 states. [2022-11-23 15:56:11,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17303 to 16628. [2022-11-23 15:56:11,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16628 states, 15513 states have (on average 3.2979436601559984) internal successors, (51161), 16627 states have internal predecessors, (51161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:56:11,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16628 states to 16628 states and 51161 transitions. [2022-11-23 15:56:11,564 INFO L78 Accepts]: Start accepts. Automaton has 16628 states and 51161 transitions. Word has length 11 [2022-11-23 15:56:11,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:56:11,564 INFO L495 AbstractCegarLoop]: Abstraction has 16628 states and 51161 transitions. [2022-11-23 15:56:11,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:56:11,565 INFO L276 IsEmpty]: Start isEmpty. Operand 16628 states and 51161 transitions. [2022-11-23 15:56:11,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 15:56:11,567 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:56:11,568 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:56:11,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 15:56:11,568 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2022-11-23 15:56:11,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:56:11,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1801420280, now seen corresponding path program 1 times [2022-11-23 15:56:11,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:56:11,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264566881] [2022-11-23 15:56:11,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:56:11,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:56:11,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:56:12,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:56:12,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:56:12,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264566881] [2022-11-23 15:56:12,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264566881] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:56:12,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:56:12,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 15:56:12,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046379328] [2022-11-23 15:56:12,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:56:12,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 15:56:12,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:56:12,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 15:56:12,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:56:12,112 INFO L87 Difference]: Start difference. First operand 16628 states and 51161 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:56:12,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:56:12,907 INFO L93 Difference]: Finished difference Result 14351 states and 43412 transitions. [2022-11-23 15:56:12,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:56:12,908 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-23 15:56:12,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:56:12,963 INFO L225 Difference]: With dead ends: 14351 [2022-11-23 15:56:12,963 INFO L226 Difference]: Without dead ends: 14351 [2022-11-23 15:56:12,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:56:12,964 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 183 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:56:12,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 61 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 15:56:12,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14351 states. [2022-11-23 15:56:13,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14351 to 14351. [2022-11-23 15:56:13,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14351 states, 13509 states have (on average 3.2135613294840475) internal successors, (43412), 14350 states have internal predecessors, (43412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:56:13,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14351 states to 14351 states and 43412 transitions. [2022-11-23 15:56:13,536 INFO L78 Accepts]: Start accepts. Automaton has 14351 states and 43412 transitions. Word has length 11 [2022-11-23 15:56:13,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:56:13,537 INFO L495 AbstractCegarLoop]: Abstraction has 14351 states and 43412 transitions. [2022-11-23 15:56:13,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:56:13,537 INFO L276 IsEmpty]: Start isEmpty. Operand 14351 states and 43412 transitions. [2022-11-23 15:56:13,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 15:56:13,539 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:56:13,540 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:56:13,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 15:56:13,540 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2022-11-23 15:56:13,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:56:13,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1541277010, now seen corresponding path program 1 times [2022-11-23 15:56:13,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:56:13,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897848147] [2022-11-23 15:56:13,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:56:13,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:56:13,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:56:13,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:56:13,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:56:13,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897848147] [2022-11-23 15:56:13,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897848147] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:56:13,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:56:13,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:56:13,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4710053] [2022-11-23 15:56:13,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:56:13,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:56:13,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:56:13,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:56:13,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:56:13,723 INFO L87 Difference]: Start difference. First operand 14351 states and 43412 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:56:14,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:56:14,056 INFO L93 Difference]: Finished difference Result 12163 states and 36730 transitions. [2022-11-23 15:56:14,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:56:14,056 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-23 15:56:14,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:56:14,095 INFO L225 Difference]: With dead ends: 12163 [2022-11-23 15:56:14,095 INFO L226 Difference]: Without dead ends: 12163 [2022-11-23 15:56:14,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:56:14,096 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 63 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:56:14,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 35 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:56:14,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12163 states. [2022-11-23 15:56:14,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12163 to 12163. [2022-11-23 15:56:14,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12163 states, 11537 states have (on average 3.1836699315246597) internal successors, (36730), 12162 states have internal predecessors, (36730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:56:14,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12163 states to 12163 states and 36730 transitions. [2022-11-23 15:56:14,452 INFO L78 Accepts]: Start accepts. Automaton has 12163 states and 36730 transitions. Word has length 11 [2022-11-23 15:56:14,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:56:14,453 INFO L495 AbstractCegarLoop]: Abstraction has 12163 states and 36730 transitions. [2022-11-23 15:56:14,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:56:14,453 INFO L276 IsEmpty]: Start isEmpty. Operand 12163 states and 36730 transitions. [2022-11-23 15:56:14,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 15:56:14,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:56:14,454 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:56:14,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 15:56:14,454 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2022-11-23 15:56:14,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:56:14,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1541277011, now seen corresponding path program 1 times [2022-11-23 15:56:14,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:56:14,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444454856] [2022-11-23 15:56:14,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:56:14,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:56:14,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:56:14,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:56:14,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:56:14,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444454856] [2022-11-23 15:56:14,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444454856] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:56:14,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:56:14,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:56:14,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181381603] [2022-11-23 15:56:14,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:56:14,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:56:14,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:56:14,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:56:14,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:56:14,548 INFO L87 Difference]: Start difference. First operand 12163 states and 36730 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:56:14,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:56:14,925 INFO L93 Difference]: Finished difference Result 14199 states and 42034 transitions. [2022-11-23 15:56:14,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:56:14,926 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-23 15:56:14,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:56:14,972 INFO L225 Difference]: With dead ends: 14199 [2022-11-23 15:56:14,972 INFO L226 Difference]: Without dead ends: 14199 [2022-11-23 15:56:14,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:56:14,973 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 55 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:56:14,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 30 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:56:15,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14199 states. [2022-11-23 15:56:15,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14199 to 12549. [2022-11-23 15:56:15,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12549 states, 12019 states have (on average 3.231134037773525) internal successors, (38835), 12548 states have internal predecessors, (38835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:56:15,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12549 states to 12549 states and 38835 transitions. [2022-11-23 15:56:15,434 INFO L78 Accepts]: Start accepts. Automaton has 12549 states and 38835 transitions. Word has length 11 [2022-11-23 15:56:15,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:56:15,434 INFO L495 AbstractCegarLoop]: Abstraction has 12549 states and 38835 transitions. [2022-11-23 15:56:15,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:56:15,435 INFO L276 IsEmpty]: Start isEmpty. Operand 12549 states and 38835 transitions. [2022-11-23 15:56:15,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 15:56:15,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:56:15,435 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-23 15:56:15,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 15:56:15,435 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2022-11-23 15:56:15,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:56:15,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1544721897, now seen corresponding path program 1 times [2022-11-23 15:56:15,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:56:15,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630805887] [2022-11-23 15:56:15,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:56:15,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:56:15,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 15:56:15,446 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 15:56:15,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 15:56:15,457 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-23 15:56:15,457 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 15:56:15,457 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (90 of 91 remaining) [2022-11-23 15:56:15,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (89 of 91 remaining) [2022-11-23 15:56:15,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (88 of 91 remaining) [2022-11-23 15:56:15,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (87 of 91 remaining) [2022-11-23 15:56:15,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (86 of 91 remaining) [2022-11-23 15:56:15,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (85 of 91 remaining) [2022-11-23 15:56:15,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (84 of 91 remaining) [2022-11-23 15:56:15,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (83 of 91 remaining) [2022-11-23 15:56:15,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (82 of 91 remaining) [2022-11-23 15:56:15,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (81 of 91 remaining) [2022-11-23 15:56:15,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 91 remaining) [2022-11-23 15:56:15,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 91 remaining) [2022-11-23 15:56:15,460 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 91 remaining) [2022-11-23 15:56:15,460 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 91 remaining) [2022-11-23 15:56:15,460 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13ASSERT_VIOLATIONARRAY_INDEX (76 of 91 remaining) [2022-11-23 15:56:15,460 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 91 remaining) [2022-11-23 15:56:15,460 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 91 remaining) [2022-11-23 15:56:15,461 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 91 remaining) [2022-11-23 15:56:15,461 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 91 remaining) [2022-11-23 15:56:15,461 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28ASSERT_VIOLATIONMEMORY_LEAK (71 of 91 remaining) [2022-11-23 15:56:15,461 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 91 remaining) [2022-11-23 15:56:15,461 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 91 remaining) [2022-11-23 15:56:15,462 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 91 remaining) [2022-11-23 15:56:15,462 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 91 remaining) [2022-11-23 15:56:15,462 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 91 remaining) [2022-11-23 15:56:15,462 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 91 remaining) [2022-11-23 15:56:15,462 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 91 remaining) [2022-11-23 15:56:15,463 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 91 remaining) [2022-11-23 15:56:15,463 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 91 remaining) [2022-11-23 15:56:15,463 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 91 remaining) [2022-11-23 15:56:15,463 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (60 of 91 remaining) [2022-11-23 15:56:15,463 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 91 remaining) [2022-11-23 15:56:15,464 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 91 remaining) [2022-11-23 15:56:15,464 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 91 remaining) [2022-11-23 15:56:15,464 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 91 remaining) [2022-11-23 15:56:15,464 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 91 remaining) [2022-11-23 15:56:15,464 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 91 remaining) [2022-11-23 15:56:15,464 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 91 remaining) [2022-11-23 15:56:15,465 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 91 remaining) [2022-11-23 15:56:15,465 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 91 remaining) [2022-11-23 15:56:15,465 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 91 remaining) [2022-11-23 15:56:15,465 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (49 of 91 remaining) [2022-11-23 15:56:15,465 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 91 remaining) [2022-11-23 15:56:15,466 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 91 remaining) [2022-11-23 15:56:15,466 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 91 remaining) [2022-11-23 15:56:15,466 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 91 remaining) [2022-11-23 15:56:15,466 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13ASSERT_VIOLATIONARRAY_INDEX (44 of 91 remaining) [2022-11-23 15:56:15,466 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 91 remaining) [2022-11-23 15:56:15,467 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 91 remaining) [2022-11-23 15:56:15,467 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 91 remaining) [2022-11-23 15:56:15,467 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 91 remaining) [2022-11-23 15:56:15,467 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28ASSERT_VIOLATIONMEMORY_LEAK (39 of 91 remaining) [2022-11-23 15:56:15,467 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 91 remaining) [2022-11-23 15:56:15,467 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 91 remaining) [2022-11-23 15:56:15,468 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 91 remaining) [2022-11-23 15:56:15,468 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 91 remaining) [2022-11-23 15:56:15,468 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 91 remaining) [2022-11-23 15:56:15,468 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 91 remaining) [2022-11-23 15:56:15,468 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 91 remaining) [2022-11-23 15:56:15,469 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 91 remaining) [2022-11-23 15:56:15,469 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 91 remaining) [2022-11-23 15:56:15,469 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 91 remaining) [2022-11-23 15:56:15,469 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 91 remaining) [2022-11-23 15:56:15,469 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 91 remaining) [2022-11-23 15:56:15,469 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 91 remaining) [2022-11-23 15:56:15,470 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 91 remaining) [2022-11-23 15:56:15,470 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 91 remaining) [2022-11-23 15:56:15,470 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 91 remaining) [2022-11-23 15:56:15,470 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 91 remaining) [2022-11-23 15:56:15,470 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 91 remaining) [2022-11-23 15:56:15,471 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (20 of 91 remaining) [2022-11-23 15:56:15,471 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 91 remaining) [2022-11-23 15:56:15,471 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 91 remaining) [2022-11-23 15:56:15,471 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 91 remaining) [2022-11-23 15:56:15,471 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 91 remaining) [2022-11-23 15:56:15,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13ASSERT_VIOLATIONARRAY_INDEX (15 of 91 remaining) [2022-11-23 15:56:15,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 91 remaining) [2022-11-23 15:56:15,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 91 remaining) [2022-11-23 15:56:15,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 91 remaining) [2022-11-23 15:56:15,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 91 remaining) [2022-11-23 15:56:15,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28ASSERT_VIOLATIONMEMORY_LEAK (10 of 91 remaining) [2022-11-23 15:56:15,473 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 91 remaining) [2022-11-23 15:56:15,473 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 91 remaining) [2022-11-23 15:56:15,473 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 91 remaining) [2022-11-23 15:56:15,473 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 91 remaining) [2022-11-23 15:56:15,473 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 91 remaining) [2022-11-23 15:56:15,474 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 91 remaining) [2022-11-23 15:56:15,474 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 91 remaining) [2022-11-23 15:56:15,474 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 91 remaining) [2022-11-23 15:56:15,474 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 91 remaining) [2022-11-23 15:56:15,474 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 91 remaining) [2022-11-23 15:56:15,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-23 15:56:15,475 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:56:15,475 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 15:56:15,475 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-23 15:56:15,541 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 15:56:15,544 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 15:56:15,545 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 305 places, 323 transitions, 667 flow [2022-11-23 15:56:15,545 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 305 places, 323 transitions, 667 flow [2022-11-23 15:56:15,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 305 places, 323 transitions, 667 flow [2022-11-23 15:56:15,627 INFO L130 PetriNetUnfolder]: 28/375 cut-off events. [2022-11-23 15:56:15,627 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-23 15:56:15,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 375 events. 28/375 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1566 event pairs, 0 based on Foata normal form. 0/244 useless extension candidates. Maximal degree in co-relation 300. Up to 8 conditions per place. [2022-11-23 15:56:15,661 INFO L119 LiptonReduction]: Number of co-enabled transitions 64296 [2022-11-23 15:56:26,480 INFO L134 LiptonReduction]: Checked pairs total: 202299 [2022-11-23 15:56:26,480 INFO L136 LiptonReduction]: Total number of compositions: 259 [2022-11-23 15:56:26,481 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 154 places, 156 transitions, 333 flow [2022-11-23 15:56:52,811 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 893323 states, 754603 states have (on average 4.736303725270109) internal successors, (3574029), 893322 states have internal predecessors, (3574029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:56:52,815 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:56:52,816 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;@427eb2dd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:56:52,816 INFO L358 AbstractCegarLoop]: Starting to check reachability of 120 error locations. [2022-11-23 15:56:53,944 INFO L276 IsEmpty]: Start isEmpty. Operand has 893323 states, 754603 states have (on average 4.736303725270109) internal successors, (3574029), 893322 states have internal predecessors, (3574029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:56:53,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-23 15:56:53,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:56:53,944 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-23 15:56:53,945 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 117 more)] === [2022-11-23 15:56:53,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:56:53,947 INFO L85 PathProgramCache]: Analyzing trace with hash 59177, now seen corresponding path program 1 times [2022-11-23 15:56:53,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:56:53,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843180140] [2022-11-23 15:56:53,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:56:53,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:56:53,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:56:53,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:56:53,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:56:53,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843180140] [2022-11-23 15:56:53,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843180140] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:56:53,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:56:53,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 15:56:53,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137226376] [2022-11-23 15:56:53,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:56:53,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 15:56:53,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:56:53,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 15:56:53,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 15:56:54,958 INFO L87 Difference]: Start difference. First operand has 893323 states, 754603 states have (on average 4.736303725270109) internal successors, (3574029), 893322 states have internal predecessors, (3574029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 2.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)