./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e715be9d-e56c-4592-8dce-3184cdbe6f18/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e715be9d-e56c-4592-8dce-3184cdbe6f18/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e715be9d-e56c-4592-8dce-3184cdbe6f18/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e715be9d-e56c-4592-8dce-3184cdbe6f18/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e715be9d-e56c-4592-8dce-3184cdbe6f18/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e715be9d-e56c-4592-8dce-3184cdbe6f18/bin/utaipan-ByfvJB40ur --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 3ace826ce717f8420bd44e3ebb10a0f5689c8f1d5dcaf8399a3f9b8d8dda146f --- 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-38b53e6 [2022-11-26 00:58:01,042 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:58:01,045 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:58:01,070 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:58:01,071 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:58:01,072 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:58:01,074 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:58:01,076 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:58:01,077 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:58:01,079 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:58:01,080 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:58:01,081 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:58:01,082 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:58:01,083 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:58:01,084 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:58:01,086 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:58:01,087 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:58:01,088 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:58:01,090 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:58:01,092 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:58:01,094 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:58:01,095 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:58:01,097 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:58:01,098 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:58:01,102 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:58:01,103 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:58:01,103 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:58:01,104 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:58:01,105 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:58:01,106 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:58:01,106 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:58:01,107 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:58:01,108 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:58:01,109 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:58:01,110 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:58:01,111 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:58:01,112 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:58:01,112 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:58:01,112 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:58:01,113 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:58:01,114 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:58:01,120 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e715be9d-e56c-4592-8dce-3184cdbe6f18/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-26 00:58:01,170 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:58:01,170 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:58:01,171 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:58:01,171 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:58:01,172 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:58:01,172 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:58:01,172 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:58:01,173 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:58:01,173 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:58:01,173 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:58:01,174 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:58:01,174 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:58:01,180 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:58:01,182 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:58:01,182 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:58:01,182 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:58:01,183 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:58:01,183 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:58:01,184 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-26 00:58:01,184 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-26 00:58:01,184 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:58:01,184 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:58:01,185 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-26 00:58:01,185 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:58:01,186 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:58:01,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:58:01,186 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-26 00:58:01,187 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-26 00:58:01,188 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-26 00:58:01,188 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:58:01,189 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-26 00:58:01,189 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:58:01,189 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:58:01,190 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:58:01,190 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:58:01,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:58:01,191 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:58:01,191 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:58:01,192 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:58:01,192 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:58:01,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:58:01,193 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:58:01,193 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_e715be9d-e56c-4592-8dce-3184cdbe6f18/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e715be9d-e56c-4592-8dce-3184cdbe6f18/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ace826ce717f8420bd44e3ebb10a0f5689c8f1d5dcaf8399a3f9b8d8dda146f [2022-11-26 00:58:01,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:58:01,575 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:58:01,579 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:58:01,582 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:58:01,583 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:58:01,584 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e715be9d-e56c-4592-8dce-3184cdbe6f18/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i [2022-11-26 00:58:04,859 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:58:05,195 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:58:05,196 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e715be9d-e56c-4592-8dce-3184cdbe6f18/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i [2022-11-26 00:58:05,217 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e715be9d-e56c-4592-8dce-3184cdbe6f18/bin/utaipan-ByfvJB40ur/data/9c33fd6dc/db65d8b27cdf4bbda077f460a641109c/FLAG40006f002 [2022-11-26 00:58:05,239 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e715be9d-e56c-4592-8dce-3184cdbe6f18/bin/utaipan-ByfvJB40ur/data/9c33fd6dc/db65d8b27cdf4bbda077f460a641109c [2022-11-26 00:58:05,242 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:58:05,244 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:58:05,246 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:58:05,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:58:05,251 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:58:05,252 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:58:05" (1/1) ... [2022-11-26 00:58:05,253 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75889c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:05, skipping insertion in model container [2022-11-26 00:58:05,254 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:58:05" (1/1) ... [2022-11-26 00:58:05,263 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:58:05,303 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:58:05,676 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_e715be9d-e56c-4592-8dce-3184cdbe6f18/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i[30438,30451] [2022-11-26 00:58:05,687 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:58:05,700 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:58:05,745 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_e715be9d-e56c-4592-8dce-3184cdbe6f18/sv-benchmarks/c/pthread-ext/31_simple_loop5_vs.i[30438,30451] [2022-11-26 00:58:05,749 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:58:05,794 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:58:05,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:05 WrapperNode [2022-11-26 00:58:05,795 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:58:05,796 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:58:05,796 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:58:05,797 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:58:05,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:05" (1/1) ... [2022-11-26 00:58:05,821 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:05" (1/1) ... [2022-11-26 00:58:05,847 INFO L138 Inliner]: procedures = 170, calls = 18, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 83 [2022-11-26 00:58:05,847 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:58:05,848 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:58:05,848 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:58:05,849 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:58:05,860 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:05" (1/1) ... [2022-11-26 00:58:05,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:05" (1/1) ... [2022-11-26 00:58:05,864 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:05" (1/1) ... [2022-11-26 00:58:05,864 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:05" (1/1) ... [2022-11-26 00:58:05,871 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:05" (1/1) ... [2022-11-26 00:58:05,877 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:05" (1/1) ... [2022-11-26 00:58:05,879 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:05" (1/1) ... [2022-11-26 00:58:05,880 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:05" (1/1) ... [2022-11-26 00:58:05,883 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:58:05,884 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:58:05,885 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:58:05,885 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:58:05,886 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:05" (1/1) ... [2022-11-26 00:58:05,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:58:05,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e715be9d-e56c-4592-8dce-3184cdbe6f18/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:58:05,926 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e715be9d-e56c-4592-8dce-3184cdbe6f18/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:58:05,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e715be9d-e56c-4592-8dce-3184cdbe6f18/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:58:05,985 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2022-11-26 00:58:05,985 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2022-11-26 00:58:05,986 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-26 00:58:05,986 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-26 00:58:05,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 00:58:05,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:58:05,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:58:05,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:58:05,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:58:05,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:58:05,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:58:05,989 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-26 00:58:06,154 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:58:06,157 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:58:06,449 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:58:06,516 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:58:06,517 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-26 00:58:06,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:58:06 BoogieIcfgContainer [2022-11-26 00:58:06,520 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:58:06,522 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:58:06,523 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:58:06,527 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:58:06,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:58:05" (1/3) ... [2022-11-26 00:58:06,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bb9abb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:58:06, skipping insertion in model container [2022-11-26 00:58:06,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:05" (2/3) ... [2022-11-26 00:58:06,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bb9abb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:58:06, skipping insertion in model container [2022-11-26 00:58:06,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:58:06" (3/3) ... [2022-11-26 00:58:06,531 INFO L112 eAbstractionObserver]: Analyzing ICFG 31_simple_loop5_vs.i [2022-11-26 00:58:06,554 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:58:06,554 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-11-26 00:58:06,554 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-26 00:58:06,611 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-26 00:58:06,652 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-26 00:58:06,670 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 73 places, 73 transitions, 156 flow [2022-11-26 00:58:06,674 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 73 places, 73 transitions, 156 flow [2022-11-26 00:58:06,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 73 transitions, 156 flow [2022-11-26 00:58:06,742 INFO L130 PetriNetUnfolder]: 7/88 cut-off events. [2022-11-26 00:58:06,742 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-26 00:58:06,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 88 events. 7/88 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 153 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 66. Up to 4 conditions per place. [2022-11-26 00:58:06,756 INFO L119 LiptonReduction]: Number of co-enabled transitions 1340 [2022-11-26 00:58:09,496 INFO L134 LiptonReduction]: Checked pairs total: 2316 [2022-11-26 00:58:09,497 INFO L136 LiptonReduction]: Total number of compositions: 62 [2022-11-26 00:58:09,513 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 30 places, 27 transitions, 64 flow [2022-11-26 00:58:09,597 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 327 states, 309 states have (on average 3.0776699029126213) internal successors, (951), 326 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:09,633 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:58:09,654 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;@43a11562, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:58:09,654 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-11-26 00:58:09,663 INFO L276 IsEmpty]: Start isEmpty. Operand has 327 states, 309 states have (on average 3.0776699029126213) internal successors, (951), 326 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:09,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-11-26 00:58:09,669 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:09,670 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-11-26 00:58:09,671 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-26 00:58:09,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:09,678 INFO L85 PathProgramCache]: Analyzing trace with hash 395, now seen corresponding path program 1 times [2022-11-26 00:58:09,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:09,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591561451] [2022-11-26 00:58:09,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:09,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:09,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:09,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:58:09,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:09,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591561451] [2022-11-26 00:58:09,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591561451] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:58:09,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:58:09,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-26 00:58:09,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757948061] [2022-11-26 00:58:09,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:58:09,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-26 00:58:09,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:09,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-26 00:58:09,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:58:09,877 INFO L87 Difference]: Start difference. First operand has 327 states, 309 states have (on average 3.0776699029126213) internal successors, (951), 326 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:09,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:09,963 INFO L93 Difference]: Finished difference Result 177 states and 477 transitions. [2022-11-26 00:58:09,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-26 00:58:09,967 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1 [2022-11-26 00:58:09,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:09,987 INFO L225 Difference]: With dead ends: 177 [2022-11-26 00:58:09,988 INFO L226 Difference]: Without dead ends: 177 [2022-11-26 00:58:09,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:58:09,997 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:09,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:58:10,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-11-26 00:58:10,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2022-11-26 00:58:10,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 175 states have (on average 2.7257142857142855) internal successors, (477), 176 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:10,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 477 transitions. [2022-11-26 00:58:10,092 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 477 transitions. Word has length 1 [2022-11-26 00:58:10,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:10,094 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 477 transitions. [2022-11-26 00:58:10,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:10,095 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 477 transitions. [2022-11-26 00:58:10,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-26 00:58:10,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:10,098 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-26 00:58:10,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:58:10,098 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-26 00:58:10,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:10,101 INFO L85 PathProgramCache]: Analyzing trace with hash 12127916, now seen corresponding path program 1 times [2022-11-26 00:58:10,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:10,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709922203] [2022-11-26 00:58:10,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:10,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:10,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:10,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:58:10,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:10,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709922203] [2022-11-26 00:58:10,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709922203] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:58:10,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:58:10,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:58:10,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085281616] [2022-11-26 00:58:10,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:58:10,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:58:10,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:10,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:58:10,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:58:10,330 INFO L87 Difference]: Start difference. First operand 177 states and 477 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:10,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:10,371 INFO L93 Difference]: Finished difference Result 147 states and 392 transitions. [2022-11-26 00:58:10,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:58:10,372 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-26 00:58:10,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:10,373 INFO L225 Difference]: With dead ends: 147 [2022-11-26 00:58:10,374 INFO L226 Difference]: Without dead ends: 147 [2022-11-26 00:58:10,374 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 [2022-11-26 00:58:10,376 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 15 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:10,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 4 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:58:10,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-26 00:58:10,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-11-26 00:58:10,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.684931506849315) internal successors, (392), 146 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:10,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 392 transitions. [2022-11-26 00:58:10,389 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 392 transitions. Word has length 4 [2022-11-26 00:58:10,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:10,389 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 392 transitions. [2022-11-26 00:58:10,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:10,390 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 392 transitions. [2022-11-26 00:58:10,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-26 00:58:10,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:10,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-26 00:58:10,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:58:10,391 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-26 00:58:10,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:10,392 INFO L85 PathProgramCache]: Analyzing trace with hash 12127917, now seen corresponding path program 1 times [2022-11-26 00:58:10,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:10,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287423658] [2022-11-26 00:58:10,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:10,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:10,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:58:10,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:10,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287423658] [2022-11-26 00:58:10,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287423658] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:58:10,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:58:10,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:58:10,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953880764] [2022-11-26 00:58:10,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:58:10,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:58:10,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:10,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:58:10,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:58:10,600 INFO L87 Difference]: Start difference. First operand 147 states and 392 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:10,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:10,629 INFO L93 Difference]: Finished difference Result 117 states and 307 transitions. [2022-11-26 00:58:10,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:58:10,630 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-26 00:58:10,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:10,634 INFO L225 Difference]: With dead ends: 117 [2022-11-26 00:58:10,634 INFO L226 Difference]: Without dead ends: 117 [2022-11-26 00:58:10,634 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 [2022-11-26 00:58:10,639 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:10,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 4 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:58:10,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-26 00:58:10,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-11-26 00:58:10,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 117 states have (on average 2.623931623931624) internal successors, (307), 116 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:10,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 307 transitions. [2022-11-26 00:58:10,663 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 307 transitions. Word has length 4 [2022-11-26 00:58:10,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:10,664 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 307 transitions. [2022-11-26 00:58:10,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:10,665 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 307 transitions. [2022-11-26 00:58:10,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-26 00:58:10,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:10,666 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-26 00:58:10,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:58:10,668 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-26 00:58:10,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:10,673 INFO L85 PathProgramCache]: Analyzing trace with hash 375921308, now seen corresponding path program 1 times [2022-11-26 00:58:10,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:10,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247773523] [2022-11-26 00:58:10,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:10,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:10,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:10,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:58:10,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:10,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247773523] [2022-11-26 00:58:10,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247773523] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:58:10,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:58:10,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:58:10,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244859398] [2022-11-26 00:58:10,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:58:10,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:58:10,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:10,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:58:10,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:58:10,769 INFO L87 Difference]: Start difference. First operand 117 states and 307 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:10,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:10,805 INFO L93 Difference]: Finished difference Result 142 states and 378 transitions. [2022-11-26 00:58:10,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:58:10,806 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-26 00:58:10,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:10,807 INFO L225 Difference]: With dead ends: 142 [2022-11-26 00:58:10,807 INFO L226 Difference]: Without dead ends: 142 [2022-11-26 00:58:10,808 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 [2022-11-26 00:58:10,809 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 9 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:10,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 5 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:58:10,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-11-26 00:58:10,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2022-11-26 00:58:10,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 142 states have (on average 2.6619718309859155) internal successors, (378), 141 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:10,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 378 transitions. [2022-11-26 00:58:10,820 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 378 transitions. Word has length 5 [2022-11-26 00:58:10,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:10,820 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 378 transitions. [2022-11-26 00:58:10,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:10,821 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 378 transitions. [2022-11-26 00:58:10,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-26 00:58:10,822 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:10,822 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-26 00:58:10,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 00:58:10,823 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-26 00:58:10,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:10,823 INFO L85 PathProgramCache]: Analyzing trace with hash -878368872, now seen corresponding path program 1 times [2022-11-26 00:58:10,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:10,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829836823] [2022-11-26 00:58:10,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:10,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:10,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-26 00:58:10,845 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-26 00:58:10,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-26 00:58:10,881 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-26 00:58:10,882 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-26 00:58:10,883 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2022-11-26 00:58:10,886 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (7 of 9 remaining) [2022-11-26 00:58:10,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2022-11-26 00:58:10,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2022-11-26 00:58:10,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (4 of 9 remaining) [2022-11-26 00:58:10,888 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 9 remaining) [2022-11-26 00:58:10,888 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 9 remaining) [2022-11-26 00:58:10,888 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 9 remaining) [2022-11-26 00:58:10,889 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2022-11-26 00:58:10,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-26 00:58:10,892 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-26 00:58:10,895 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-26 00:58:10,895 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-26 00:58:10,921 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-26 00:58:10,924 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-26 00:58:10,925 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 100 transitions, 224 flow [2022-11-26 00:58:10,925 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 100 transitions, 224 flow [2022-11-26 00:58:10,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 100 transitions, 224 flow [2022-11-26 00:58:10,956 INFO L130 PetriNetUnfolder]: 10/119 cut-off events. [2022-11-26 00:58:10,957 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-26 00:58:10,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 119 events. 10/119 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 241 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 128. Up to 6 conditions per place. [2022-11-26 00:58:10,962 INFO L119 LiptonReduction]: Number of co-enabled transitions 2446 [2022-11-26 00:58:13,723 INFO L134 LiptonReduction]: Checked pairs total: 6910 [2022-11-26 00:58:13,723 INFO L136 LiptonReduction]: Total number of compositions: 79 [2022-11-26 00:58:13,725 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 50 places, 45 transitions, 114 flow [2022-11-26 00:58:13,987 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 3819 states, 3794 states have (on average 3.9688982604111755) internal successors, (15058), 3818 states have internal predecessors, (15058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:13,989 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:58:13,993 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;@43a11562, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:58:13,993 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-11-26 00:58:14,008 INFO L276 IsEmpty]: Start isEmpty. Operand has 3819 states, 3794 states have (on average 3.9688982604111755) internal successors, (15058), 3818 states have internal predecessors, (15058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:14,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-11-26 00:58:14,009 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:14,009 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-11-26 00:58:14,009 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-26 00:58:14,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:14,010 INFO L85 PathProgramCache]: Analyzing trace with hash 602, now seen corresponding path program 1 times [2022-11-26 00:58:14,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:14,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119226179] [2022-11-26 00:58:14,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:14,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:14,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:14,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:58:14,030 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:14,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119226179] [2022-11-26 00:58:14,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119226179] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:58:14,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:58:14,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-26 00:58:14,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779827936] [2022-11-26 00:58:14,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:58:14,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-26 00:58:14,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:14,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-26 00:58:14,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:58:14,046 INFO L87 Difference]: Start difference. First operand has 3819 states, 3794 states have (on average 3.9688982604111755) internal successors, (15058), 3818 states have internal predecessors, (15058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:14,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:14,117 INFO L93 Difference]: Finished difference Result 1957 states and 7307 transitions. [2022-11-26 00:58:14,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-26 00:58:14,118 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1 [2022-11-26 00:58:14,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:14,140 INFO L225 Difference]: With dead ends: 1957 [2022-11-26 00:58:14,141 INFO L226 Difference]: Without dead ends: 1957 [2022-11-26 00:58:14,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:58:14,142 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:14,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:58:14,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2022-11-26 00:58:14,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1957. [2022-11-26 00:58:14,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1957 states, 1955 states have (on average 3.7375959079283887) internal successors, (7307), 1956 states have internal predecessors, (7307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:14,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1957 states to 1957 states and 7307 transitions. [2022-11-26 00:58:14,262 INFO L78 Accepts]: Start accepts. Automaton has 1957 states and 7307 transitions. Word has length 1 [2022-11-26 00:58:14,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:14,263 INFO L495 AbstractCegarLoop]: Abstraction has 1957 states and 7307 transitions. [2022-11-26 00:58:14,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:14,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1957 states and 7307 transitions. [2022-11-26 00:58:14,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-26 00:58:14,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:14,265 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-26 00:58:14,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-26 00:58:14,266 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-26 00:58:14,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:14,267 INFO L85 PathProgramCache]: Analyzing trace with hash 570018069, now seen corresponding path program 1 times [2022-11-26 00:58:14,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:14,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192143871] [2022-11-26 00:58:14,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:14,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:14,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:14,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:58:14,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:14,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192143871] [2022-11-26 00:58:14,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192143871] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:58:14,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:58:14,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:58:14,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926445942] [2022-11-26 00:58:14,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:58:14,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:58:14,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:14,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:58:14,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:58:14,435 INFO L87 Difference]: Start difference. First operand 1957 states and 7307 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:14,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:14,491 INFO L93 Difference]: Finished difference Result 1672 states and 6212 transitions. [2022-11-26 00:58:14,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:58:14,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-26 00:58:14,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:14,509 INFO L225 Difference]: With dead ends: 1672 [2022-11-26 00:58:14,510 INFO L226 Difference]: Without dead ends: 1672 [2022-11-26 00:58:14,510 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 [2022-11-26 00:58:14,513 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:14,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 17 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:58:14,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2022-11-26 00:58:14,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 1672. [2022-11-26 00:58:14,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1671 states have (on average 3.717534410532615) internal successors, (6212), 1671 states have internal predecessors, (6212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:14,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 6212 transitions. [2022-11-26 00:58:14,595 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 6212 transitions. Word has length 5 [2022-11-26 00:58:14,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:14,596 INFO L495 AbstractCegarLoop]: Abstraction has 1672 states and 6212 transitions. [2022-11-26 00:58:14,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:14,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 6212 transitions. [2022-11-26 00:58:14,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-26 00:58:14,597 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:14,597 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-26 00:58:14,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-26 00:58:14,598 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-26 00:58:14,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:14,599 INFO L85 PathProgramCache]: Analyzing trace with hash 570018070, now seen corresponding path program 1 times [2022-11-26 00:58:14,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:14,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448840314] [2022-11-26 00:58:14,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:14,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:14,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:14,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:58:14,678 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:14,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448840314] [2022-11-26 00:58:14,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448840314] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:58:14,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:58:14,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:58:14,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185828421] [2022-11-26 00:58:14,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:58:14,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:58:14,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:14,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:58:14,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:58:14,684 INFO L87 Difference]: Start difference. First operand 1672 states and 6212 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:14,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:14,806 INFO L93 Difference]: Finished difference Result 1387 states and 5117 transitions. [2022-11-26 00:58:14,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:58:14,807 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-26 00:58:14,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:14,823 INFO L225 Difference]: With dead ends: 1387 [2022-11-26 00:58:14,823 INFO L226 Difference]: Without dead ends: 1387 [2022-11-26 00:58:14,824 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 [2022-11-26 00:58:14,825 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:14,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 17 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:58:14,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2022-11-26 00:58:14,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 1387. [2022-11-26 00:58:14,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1387 states, 1387 states have (on average 3.689257390050469) internal successors, (5117), 1386 states have internal predecessors, (5117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:14,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1387 states to 1387 states and 5117 transitions. [2022-11-26 00:58:14,931 INFO L78 Accepts]: Start accepts. Automaton has 1387 states and 5117 transitions. Word has length 5 [2022-11-26 00:58:14,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:14,932 INFO L495 AbstractCegarLoop]: Abstraction has 1387 states and 5117 transitions. [2022-11-26 00:58:14,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:14,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1387 states and 5117 transitions. [2022-11-26 00:58:14,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-26 00:58:14,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:14,934 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-26 00:58:14,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-26 00:58:14,935 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-26 00:58:14,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:14,936 INFO L85 PathProgramCache]: Analyzing trace with hash 570076855, now seen corresponding path program 1 times [2022-11-26 00:58:14,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:14,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308933948] [2022-11-26 00:58:14,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:14,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:14,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:15,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:58:15,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:15,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308933948] [2022-11-26 00:58:15,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308933948] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:58:15,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:58:15,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:58:15,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626940073] [2022-11-26 00:58:15,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:58:15,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:58:15,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:15,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:58:15,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:58:15,022 INFO L87 Difference]: Start difference. First operand 1387 states and 5117 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:15,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:15,126 INFO L93 Difference]: Finished difference Result 2253 states and 8351 transitions. [2022-11-26 00:58:15,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:58:15,127 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-26 00:58:15,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:15,149 INFO L225 Difference]: With dead ends: 2253 [2022-11-26 00:58:15,149 INFO L226 Difference]: Without dead ends: 2253 [2022-11-26 00:58:15,150 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 [2022-11-26 00:58:15,150 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 20 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:15,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 24 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:58:15,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2022-11-26 00:58:15,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 2253. [2022-11-26 00:58:15,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2253 states have (on average 3.706613404349756) internal successors, (8351), 2252 states have internal predecessors, (8351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:15,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 8351 transitions. [2022-11-26 00:58:15,263 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 8351 transitions. Word has length 5 [2022-11-26 00:58:15,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:15,263 INFO L495 AbstractCegarLoop]: Abstraction has 2253 states and 8351 transitions. [2022-11-26 00:58:15,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:15,264 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 8351 transitions. [2022-11-26 00:58:15,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:58:15,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:15,266 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:58:15,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-26 00:58:15,266 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-26 00:58:15,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:15,267 INFO L85 PathProgramCache]: Analyzing trace with hash -189027244, now seen corresponding path program 1 times [2022-11-26 00:58:15,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:15,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044382735] [2022-11-26 00:58:15,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:15,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:15,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:15,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:58:15,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:15,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044382735] [2022-11-26 00:58:15,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044382735] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:58:15,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:58:15,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:58:15,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538366931] [2022-11-26 00:58:15,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:58:15,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:58:15,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:15,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:58:15,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:58:15,340 INFO L87 Difference]: Start difference. First operand 2253 states and 8351 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:15,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:15,392 INFO L93 Difference]: Finished difference Result 542 states and 1538 transitions. [2022-11-26 00:58:15,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:58:15,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2022-11-26 00:58:15,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:15,397 INFO L225 Difference]: With dead ends: 542 [2022-11-26 00:58:15,397 INFO L226 Difference]: Without dead ends: 542 [2022-11-26 00:58:15,398 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 [2022-11-26 00:58:15,398 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 19 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:15,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 33 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:58:15,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-11-26 00:58:15,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 446. [2022-11-26 00:58:15,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 2.8629213483146065) internal successors, (1274), 445 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:15,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 1274 transitions. [2022-11-26 00:58:15,419 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 1274 transitions. Word has length 13 [2022-11-26 00:58:15,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:15,419 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 1274 transitions. [2022-11-26 00:58:15,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:15,420 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 1274 transitions. [2022-11-26 00:58:15,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-26 00:58:15,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:15,422 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:58:15,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-26 00:58:15,423 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-26 00:58:15,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:15,423 INFO L85 PathProgramCache]: Analyzing trace with hash 505989184, now seen corresponding path program 1 times [2022-11-26 00:58:15,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:15,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286817606] [2022-11-26 00:58:15,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:15,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:15,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-26 00:58:15,439 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-26 00:58:15,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-26 00:58:15,454 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-26 00:58:15,454 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-26 00:58:15,454 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2022-11-26 00:58:15,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (8 of 10 remaining) [2022-11-26 00:58:15,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2022-11-26 00:58:15,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2022-11-26 00:58:15,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (5 of 10 remaining) [2022-11-26 00:58:15,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 10 remaining) [2022-11-26 00:58:15,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 10 remaining) [2022-11-26 00:58:15,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 10 remaining) [2022-11-26 00:58:15,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 10 remaining) [2022-11-26 00:58:15,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2022-11-26 00:58:15,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-26 00:58:15,458 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-26 00:58:15,458 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-26 00:58:15,458 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-26 00:58:15,513 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-26 00:58:15,516 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-26 00:58:15,516 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 125 places, 127 transitions, 296 flow [2022-11-26 00:58:15,517 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 125 places, 127 transitions, 296 flow [2022-11-26 00:58:15,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 127 transitions, 296 flow [2022-11-26 00:58:15,548 INFO L130 PetriNetUnfolder]: 13/150 cut-off events. [2022-11-26 00:58:15,549 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-26 00:58:15,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 150 events. 13/150 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 337 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 164. Up to 8 conditions per place. [2022-11-26 00:58:15,555 INFO L119 LiptonReduction]: Number of co-enabled transitions 3864 [2022-11-26 00:58:18,473 INFO L134 LiptonReduction]: Checked pairs total: 11222 [2022-11-26 00:58:18,473 INFO L136 LiptonReduction]: Total number of compositions: 102 [2022-11-26 00:58:18,474 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 66 places, 59 transitions, 160 flow [2022-11-26 00:58:20,408 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 30571 states, 30539 states have (on average 4.946396411146403) internal successors, (151058), 30570 states have internal predecessors, (151058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:20,409 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:58:20,410 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;@43a11562, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:58:20,410 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-11-26 00:58:20,693 INFO L276 IsEmpty]: Start isEmpty. Operand has 30571 states, 30539 states have (on average 4.946396411146403) internal successors, (151058), 30570 states have internal predecessors, (151058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:20,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-11-26 00:58:20,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:20,694 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-11-26 00:58:20,694 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-26 00:58:20,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:20,695 INFO L85 PathProgramCache]: Analyzing trace with hash 857, now seen corresponding path program 1 times [2022-11-26 00:58:20,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:20,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872087644] [2022-11-26 00:58:20,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:20,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:20,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:20,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:58:20,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:20,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872087644] [2022-11-26 00:58:20,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872087644] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:58:20,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:58:20,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-26 00:58:20,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626334303] [2022-11-26 00:58:20,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:58:20,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-26 00:58:20,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:20,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-26 00:58:20,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:58:20,764 INFO L87 Difference]: Start difference. First operand has 30571 states, 30539 states have (on average 4.946396411146403) internal successors, (151058), 30570 states have internal predecessors, (151058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:21,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:21,293 INFO L93 Difference]: Finished difference Result 13717 states and 64882 transitions. [2022-11-26 00:58:21,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-26 00:58:21,294 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1 [2022-11-26 00:58:21,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:21,670 INFO L225 Difference]: With dead ends: 13717 [2022-11-26 00:58:21,670 INFO L226 Difference]: Without dead ends: 13717 [2022-11-26 00:58:21,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:58:21,673 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:21,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:58:21,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13717 states. [2022-11-26 00:58:22,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13717 to 13717. [2022-11-26 00:58:23,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13717 states, 13715 states have (on average 4.73073277433467) internal successors, (64882), 13716 states have internal predecessors, (64882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:23,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13717 states to 13717 states and 64882 transitions. [2022-11-26 00:58:23,184 INFO L78 Accepts]: Start accepts. Automaton has 13717 states and 64882 transitions. Word has length 1 [2022-11-26 00:58:23,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:23,185 INFO L495 AbstractCegarLoop]: Abstraction has 13717 states and 64882 transitions. [2022-11-26 00:58:23,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:23,185 INFO L276 IsEmpty]: Start isEmpty. Operand 13717 states and 64882 transitions. [2022-11-26 00:58:23,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-26 00:58:23,186 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:23,186 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-26 00:58:23,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-26 00:58:23,187 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-26 00:58:23,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:23,187 INFO L85 PathProgramCache]: Analyzing trace with hash 815372811, now seen corresponding path program 1 times [2022-11-26 00:58:23,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:23,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809705230] [2022-11-26 00:58:23,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:23,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:23,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:23,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:58:23,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:23,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809705230] [2022-11-26 00:58:23,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809705230] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:58:23,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:58:23,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:58:23,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210647766] [2022-11-26 00:58:23,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:58:23,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:58:23,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:23,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:58:23,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:58:23,232 INFO L87 Difference]: Start difference. First operand 13717 states and 64882 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:23,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:23,574 INFO L93 Difference]: Finished difference Result 11717 states and 55212 transitions. [2022-11-26 00:58:23,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:58:23,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-26 00:58:23,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:23,676 INFO L225 Difference]: With dead ends: 11717 [2022-11-26 00:58:23,676 INFO L226 Difference]: Without dead ends: 11717 [2022-11-26 00:58:23,677 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 [2022-11-26 00:58:23,678 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 34 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:23,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 22 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:58:23,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11717 states. [2022-11-26 00:58:24,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11717 to 11717. [2022-11-26 00:58:24,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11717 states, 11716 states have (on average 4.712529873677023) internal successors, (55212), 11716 states have internal predecessors, (55212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:24,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11717 states to 11717 states and 55212 transitions. [2022-11-26 00:58:24,673 INFO L78 Accepts]: Start accepts. Automaton has 11717 states and 55212 transitions. Word has length 5 [2022-11-26 00:58:24,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:24,673 INFO L495 AbstractCegarLoop]: Abstraction has 11717 states and 55212 transitions. [2022-11-26 00:58:24,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:24,674 INFO L276 IsEmpty]: Start isEmpty. Operand 11717 states and 55212 transitions. [2022-11-26 00:58:24,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-26 00:58:24,674 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:24,675 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-26 00:58:24,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-26 00:58:24,675 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-26 00:58:24,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:24,676 INFO L85 PathProgramCache]: Analyzing trace with hash 815372812, now seen corresponding path program 1 times [2022-11-26 00:58:24,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:24,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448349716] [2022-11-26 00:58:24,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:24,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:24,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:24,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:58:24,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:24,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448349716] [2022-11-26 00:58:24,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448349716] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:58:24,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:58:24,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:58:24,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588786422] [2022-11-26 00:58:24,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:58:24,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:58:24,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:24,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:58:24,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:58:24,747 INFO L87 Difference]: Start difference. First operand 11717 states and 55212 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:25,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:25,153 INFO L93 Difference]: Finished difference Result 9717 states and 45542 transitions. [2022-11-26 00:58:25,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:58:25,155 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-26 00:58:25,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:25,235 INFO L225 Difference]: With dead ends: 9717 [2022-11-26 00:58:25,235 INFO L226 Difference]: Without dead ends: 9717 [2022-11-26 00:58:25,236 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 [2022-11-26 00:58:25,237 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:25,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 22 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:58:25,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9717 states. [2022-11-26 00:58:25,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9717 to 9717. [2022-11-26 00:58:25,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9717 states, 9717 states have (on average 4.686837501286405) internal successors, (45542), 9716 states have internal predecessors, (45542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:26,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9717 states to 9717 states and 45542 transitions. [2022-11-26 00:58:26,083 INFO L78 Accepts]: Start accepts. Automaton has 9717 states and 45542 transitions. Word has length 5 [2022-11-26 00:58:26,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:26,084 INFO L495 AbstractCegarLoop]: Abstraction has 9717 states and 45542 transitions. [2022-11-26 00:58:26,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:26,084 INFO L276 IsEmpty]: Start isEmpty. Operand 9717 states and 45542 transitions. [2022-11-26 00:58:26,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-26 00:58:26,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:26,087 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-26 00:58:26,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-26 00:58:26,088 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-26 00:58:26,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:26,089 INFO L85 PathProgramCache]: Analyzing trace with hash 815444154, now seen corresponding path program 1 times [2022-11-26 00:58:26,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:26,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448185170] [2022-11-26 00:58:26,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:26,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:26,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:26,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:58:26,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:26,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448185170] [2022-11-26 00:58:26,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448185170] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:58:26,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:58:26,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:58:26,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374341819] [2022-11-26 00:58:26,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:58:26,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:58:26,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:26,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:58:26,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:58:26,138 INFO L87 Difference]: Start difference. First operand 9717 states and 45542 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:26,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:26,429 INFO L93 Difference]: Finished difference Result 15865 states and 74414 transitions. [2022-11-26 00:58:26,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:58:26,430 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-26 00:58:26,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:26,829 INFO L225 Difference]: With dead ends: 15865 [2022-11-26 00:58:26,829 INFO L226 Difference]: Without dead ends: 15865 [2022-11-26 00:58:26,830 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 [2022-11-26 00:58:26,830 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 26 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:26,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 31 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:58:26,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15865 states. [2022-11-26 00:58:27,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15865 to 15865. [2022-11-26 00:58:27,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15865 states, 15865 states have (on average 4.690450677592184) internal successors, (74414), 15864 states have internal predecessors, (74414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:27,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15865 states to 15865 states and 74414 transitions. [2022-11-26 00:58:27,869 INFO L78 Accepts]: Start accepts. Automaton has 15865 states and 74414 transitions. Word has length 5 [2022-11-26 00:58:27,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:27,869 INFO L495 AbstractCegarLoop]: Abstraction has 15865 states and 74414 transitions. [2022-11-26 00:58:27,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:27,870 INFO L276 IsEmpty]: Start isEmpty. Operand 15865 states and 74414 transitions. [2022-11-26 00:58:27,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:58:27,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:27,871 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:58:27,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-26 00:58:27,871 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-26 00:58:27,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:27,872 INFO L85 PathProgramCache]: Analyzing trace with hash -249062117, now seen corresponding path program 1 times [2022-11-26 00:58:27,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:27,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96072378] [2022-11-26 00:58:27,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:27,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:27,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:28,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:58:28,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:28,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96072378] [2022-11-26 00:58:28,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96072378] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:58:28,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:58:28,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:58:28,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531895814] [2022-11-26 00:58:28,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:58:28,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:58:28,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:28,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:58:28,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:58:28,060 INFO L87 Difference]: Start difference. First operand 15865 states and 74414 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:28,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:28,119 INFO L93 Difference]: Finished difference Result 1598 states and 5330 transitions. [2022-11-26 00:58:28,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:58:28,120 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2022-11-26 00:58:28,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:28,126 INFO L225 Difference]: With dead ends: 1598 [2022-11-26 00:58:28,127 INFO L226 Difference]: Without dead ends: 1598 [2022-11-26 00:58:28,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:58:28,128 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 81 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:28,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 40 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:58:28,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1598 states. [2022-11-26 00:58:28,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1598 to 1278. [2022-11-26 00:58:28,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1278 states, 1277 states have (on average 3.371965544244323) internal successors, (4306), 1277 states have internal predecessors, (4306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:28,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 4306 transitions. [2022-11-26 00:58:28,175 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 4306 transitions. Word has length 13 [2022-11-26 00:58:28,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:28,176 INFO L495 AbstractCegarLoop]: Abstraction has 1278 states and 4306 transitions. [2022-11-26 00:58:28,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:28,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 4306 transitions. [2022-11-26 00:58:28,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-26 00:58:28,178 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:28,178 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:58:28,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-26 00:58:28,179 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-26 00:58:28,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:28,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1946525945, now seen corresponding path program 1 times [2022-11-26 00:58:28,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:28,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821159586] [2022-11-26 00:58:28,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:28,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:28,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:28,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:58:28,441 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:28,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821159586] [2022-11-26 00:58:28,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821159586] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:58:28,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:58:28,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:58:28,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793694855] [2022-11-26 00:58:28,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:58:28,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:58:28,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:28,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:58:28,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:58:28,444 INFO L87 Difference]: Start difference. First operand 1278 states and 4306 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:28,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:28,636 INFO L93 Difference]: Finished difference Result 2857 states and 9542 transitions. [2022-11-26 00:58:28,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:58:28,637 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2022-11-26 00:58:28,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:28,648 INFO L225 Difference]: With dead ends: 2857 [2022-11-26 00:58:28,649 INFO L226 Difference]: Without dead ends: 2857 [2022-11-26 00:58:28,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:58:28,650 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 72 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:28,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 71 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:58:28,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2857 states. [2022-11-26 00:58:28,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2857 to 2282. [2022-11-26 00:58:28,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2282 states, 2281 states have (on average 3.3397632617273127) internal successors, (7618), 2281 states have internal predecessors, (7618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:28,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 7618 transitions. [2022-11-26 00:58:28,736 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 7618 transitions. Word has length 16 [2022-11-26 00:58:28,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:28,737 INFO L495 AbstractCegarLoop]: Abstraction has 2282 states and 7618 transitions. [2022-11-26 00:58:28,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:28,737 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 7618 transitions. [2022-11-26 00:58:28,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-26 00:58:28,740 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:28,740 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:58:28,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-26 00:58:28,741 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-26 00:58:28,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:28,741 INFO L85 PathProgramCache]: Analyzing trace with hash -414251569, now seen corresponding path program 1 times [2022-11-26 00:58:28,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:28,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144091354] [2022-11-26 00:58:28,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:28,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:28,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-26 00:58:28,759 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-26 00:58:28,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-26 00:58:28,774 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-26 00:58:28,774 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-26 00:58:28,775 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 11 remaining) [2022-11-26 00:58:28,775 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (9 of 11 remaining) [2022-11-26 00:58:28,775 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2022-11-26 00:58:28,775 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2022-11-26 00:58:28,776 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (6 of 11 remaining) [2022-11-26 00:58:28,776 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 11 remaining) [2022-11-26 00:58:28,776 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 11 remaining) [2022-11-26 00:58:28,777 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 11 remaining) [2022-11-26 00:58:28,777 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 11 remaining) [2022-11-26 00:58:28,777 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 11 remaining) [2022-11-26 00:58:28,777 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 11 remaining) [2022-11-26 00:58:28,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-26 00:58:28,778 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:58:28,779 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-26 00:58:28,779 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-26 00:58:28,816 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-26 00:58:28,819 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-26 00:58:28,819 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 151 places, 154 transitions, 372 flow [2022-11-26 00:58:28,820 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 151 places, 154 transitions, 372 flow [2022-11-26 00:58:28,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 154 transitions, 372 flow [2022-11-26 00:58:28,892 INFO L130 PetriNetUnfolder]: 16/181 cut-off events. [2022-11-26 00:58:28,898 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-26 00:58:28,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 181 events. 16/181 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 418 event pairs, 0 based on Foata normal form. 0/142 useless extension candidates. Maximal degree in co-relation 201. Up to 10 conditions per place. [2022-11-26 00:58:28,910 INFO L119 LiptonReduction]: Number of co-enabled transitions 5594 [2022-11-26 00:58:32,540 INFO L134 LiptonReduction]: Checked pairs total: 19499 [2022-11-26 00:58:32,540 INFO L136 LiptonReduction]: Total number of compositions: 119 [2022-11-26 00:58:32,542 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 82 places, 73 transitions, 210 flow [2022-11-26 00:58:44,330 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 244587 states, 244548 states have (on average 5.94187644143481) internal successors, (1453074), 244586 states have internal predecessors, (1453074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:44,344 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:58:44,345 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;@43a11562, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:58:44,345 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-11-26 00:58:44,782 INFO L276 IsEmpty]: Start isEmpty. Operand has 244587 states, 244548 states have (on average 5.94187644143481) internal successors, (1453074), 244586 states have internal predecessors, (1453074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:44,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-11-26 00:58:44,783 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:44,783 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-11-26 00:58:44,783 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-26 00:58:44,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:44,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1158, now seen corresponding path program 1 times [2022-11-26 00:58:44,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:44,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275476030] [2022-11-26 00:58:44,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:44,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:44,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:44,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:58:44,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:44,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275476030] [2022-11-26 00:58:44,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275476030] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:58:44,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:58:44,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-26 00:58:44,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337997408] [2022-11-26 00:58:44,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:58:44,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-26 00:58:44,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:44,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-26 00:58:44,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:58:45,211 INFO L87 Difference]: Start difference. First operand has 244587 states, 244548 states have (on average 5.94187644143481) internal successors, (1453074), 244586 states have internal predecessors, (1453074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:47,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:47,975 INFO L93 Difference]: Finished difference Result 96037 states and 550227 transitions. [2022-11-26 00:58:47,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-26 00:58:47,975 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1 [2022-11-26 00:58:47,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:50,231 INFO L225 Difference]: With dead ends: 96037 [2022-11-26 00:58:50,232 INFO L226 Difference]: Without dead ends: 96037 [2022-11-26 00:58:50,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:58:50,233 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:50,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:58:50,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96037 states. [2022-11-26 00:58:55,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96037 to 96037. [2022-11-26 00:58:55,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96037 states, 96035 states have (on average 5.729442390795023) internal successors, (550227), 96036 states have internal predecessors, (550227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:57,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96037 states to 96037 states and 550227 transitions. [2022-11-26 00:58:57,111 INFO L78 Accepts]: Start accepts. Automaton has 96037 states and 550227 transitions. Word has length 1 [2022-11-26 00:58:57,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:57,111 INFO L495 AbstractCegarLoop]: Abstraction has 96037 states and 550227 transitions. [2022-11-26 00:58:57,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:57,112 INFO L276 IsEmpty]: Start isEmpty. Operand 96037 states and 550227 transitions. [2022-11-26 00:58:57,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-26 00:58:57,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:57,112 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-26 00:58:57,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-26 00:58:57,113 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-26 00:58:57,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:57,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1099207589, now seen corresponding path program 1 times [2022-11-26 00:58:57,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:57,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644958029] [2022-11-26 00:58:57,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:57,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:57,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:58:57,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:57,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644958029] [2022-11-26 00:58:57,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644958029] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:58:57,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:58:57,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:58:57,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566798224] [2022-11-26 00:58:57,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:58:57,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:58:57,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:57,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:58:57,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:58:57,170 INFO L87 Difference]: Start difference. First operand 96037 states and 550227 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:58:59,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:59,402 INFO L93 Difference]: Finished difference Result 82032 states and 468527 transitions. [2022-11-26 00:58:59,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:58:59,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-26 00:58:59,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:00,171 INFO L225 Difference]: With dead ends: 82032 [2022-11-26 00:59:00,171 INFO L226 Difference]: Without dead ends: 82032 [2022-11-26 00:59:00,171 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 [2022-11-26 00:59:00,173 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:00,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 27 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:59:00,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82032 states. [2022-11-26 00:59:04,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82032 to 82032. [2022-11-26 00:59:04,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82032 states, 82031 states have (on average 5.711584644829394) internal successors, (468527), 82031 states have internal predecessors, (468527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:59:06,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82032 states to 82032 states and 468527 transitions. [2022-11-26 00:59:06,800 INFO L78 Accepts]: Start accepts. Automaton has 82032 states and 468527 transitions. Word has length 5 [2022-11-26 00:59:06,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:06,801 INFO L495 AbstractCegarLoop]: Abstraction has 82032 states and 468527 transitions. [2022-11-26 00:59:06,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:59:06,814 INFO L276 IsEmpty]: Start isEmpty. Operand 82032 states and 468527 transitions. [2022-11-26 00:59:06,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-26 00:59:06,815 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:06,815 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-26 00:59:06,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-26 00:59:06,816 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-26 00:59:06,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:06,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1099207590, now seen corresponding path program 1 times [2022-11-26 00:59:06,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:06,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540112849] [2022-11-26 00:59:06,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:06,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:06,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:06,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:59:06,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:06,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540112849] [2022-11-26 00:59:06,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540112849] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:59:06,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:59:06,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:59:06,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854684339] [2022-11-26 00:59:06,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:59:06,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:59:06,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:06,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:59:06,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:59:06,875 INFO L87 Difference]: Start difference. First operand 82032 states and 468527 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:59:07,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:07,901 INFO L93 Difference]: Finished difference Result 68027 states and 386827 transitions. [2022-11-26 00:59:07,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:59:07,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-26 00:59:07,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted.