./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-deagle/reorder_c11_good-50.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-deagle/reorder_c11_good-50.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/bin/uautomizer-tPACEb0tL8 --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a3b533c73361ee15e10e9133a2147995318be27bb7652d57aee6ac7672acea5b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 12:20:52,865 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:20:52,871 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:20:52,911 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:20:52,911 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:20:52,912 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:20:52,914 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:20:52,916 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:20:52,917 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:20:52,922 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:20:52,924 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:20:52,927 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:20:52,928 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:20:52,933 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:20:52,939 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:20:52,941 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:20:52,943 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:20:52,945 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:20:52,947 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:20:52,956 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:20:52,957 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:20:52,959 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:20:52,963 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:20:52,964 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:20:52,966 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:20:52,966 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:20:52,967 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:20:52,971 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:20:52,972 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:20:52,973 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:20:52,973 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:20:52,974 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:20:52,976 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:20:52,978 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:20:52,980 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:20:52,981 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:20:52,981 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:20:52,982 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:20:52,982 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:20:52,983 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:20:52,984 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:20:52,984 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-16 12:20:53,023 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:20:53,024 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:20:53,024 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:20:53,024 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:20:53,025 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:20:53,025 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:20:53,026 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:20:53,026 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:20:53,026 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:20:53,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:20:53,028 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:20:53,028 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 12:20:53,028 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:20:53,028 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:20:53,028 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:20:53,029 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 12:20:53,029 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 12:20:53,029 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 12:20:53,029 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:20:53,029 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 12:20:53,029 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:20:53,030 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:20:53,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:20:53,030 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:20:53,030 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:20:53,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:20:53,032 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:20:53,032 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:20:53,032 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:20:53,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:20:53,033 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_441acb0b-572d-4c13-885f-508f76d7e48d/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a3b533c73361ee15e10e9133a2147995318be27bb7652d57aee6ac7672acea5b [2022-11-16 12:20:53,353 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:20:53,388 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:20:53,392 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:20:53,394 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:20:53,395 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:20:53,397 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/pthread-deagle/reorder_c11_good-50.i [2022-11-16 12:20:53,491 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/bin/uautomizer-tPACEb0tL8/data/409a0c76d/b03c3287fcdb4f528960208c0da4fff9/FLAG440b0155f [2022-11-16 12:20:54,136 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:20:54,137 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/sv-benchmarks/c/pthread-deagle/reorder_c11_good-50.i [2022-11-16 12:20:54,153 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/bin/uautomizer-tPACEb0tL8/data/409a0c76d/b03c3287fcdb4f528960208c0da4fff9/FLAG440b0155f [2022-11-16 12:20:54,381 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/bin/uautomizer-tPACEb0tL8/data/409a0c76d/b03c3287fcdb4f528960208c0da4fff9 [2022-11-16 12:20:54,384 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:20:54,386 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:20:54,394 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:20:54,395 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:20:54,398 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:20:54,400 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:20:54" (1/1) ... [2022-11-16 12:20:54,403 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c4a05b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:54, skipping insertion in model container [2022-11-16 12:20:54,403 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:20:54" (1/1) ... [2022-11-16 12:20:54,410 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:20:54,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:20:55,001 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/sv-benchmarks/c/pthread-deagle/reorder_c11_good-50.i[30195,30208] [2022-11-16 12:20:55,025 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:20:55,035 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:20:55,096 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/sv-benchmarks/c/pthread-deagle/reorder_c11_good-50.i[30195,30208] [2022-11-16 12:20:55,103 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:20:55,151 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:20:55,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:55 WrapperNode [2022-11-16 12:20:55,154 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:20:55,156 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:20:55,156 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:20:55,157 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:20:55,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:55" (1/1) ... [2022-11-16 12:20:55,201 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:55" (1/1) ... [2022-11-16 12:20:55,236 INFO L138 Inliner]: procedures = 163, calls = 21, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 71 [2022-11-16 12:20:55,237 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:20:55,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:20:55,238 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:20:55,238 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:20:55,249 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:55" (1/1) ... [2022-11-16 12:20:55,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:55" (1/1) ... [2022-11-16 12:20:55,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:55" (1/1) ... [2022-11-16 12:20:55,256 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:55" (1/1) ... [2022-11-16 12:20:55,274 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:55" (1/1) ... [2022-11-16 12:20:55,282 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:55" (1/1) ... [2022-11-16 12:20:55,284 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:55" (1/1) ... [2022-11-16 12:20:55,291 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:55" (1/1) ... [2022-11-16 12:20:55,293 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:20:55,294 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:20:55,294 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:20:55,294 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:20:55,296 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:55" (1/1) ... [2022-11-16 12:20:55,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:20:55,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:20:55,336 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:20:55,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:20:55,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:20:55,399 INFO L130 BoogieDeclarations]: Found specification of procedure setThread [2022-11-16 12:20:55,399 INFO L138 BoogieDeclarations]: Found implementation of procedure setThread [2022-11-16 12:20:55,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:20:55,399 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 12:20:55,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:20:55,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:20:55,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:20:55,400 INFO L130 BoogieDeclarations]: Found specification of procedure checkThread [2022-11-16 12:20:55,400 INFO L138 BoogieDeclarations]: Found implementation of procedure checkThread [2022-11-16 12:20:55,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:20:55,400 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 12:20:55,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:20:55,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:20:55,402 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 12:20:55,599 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:20:55,601 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:20:55,928 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:20:55,936 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:20:55,938 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-16 12:20:55,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:20:55 BoogieIcfgContainer [2022-11-16 12:20:55,945 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:20:55,948 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:20:55,948 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:20:55,952 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:20:55,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:20:54" (1/3) ... [2022-11-16 12:20:55,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4147b77d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:20:55, skipping insertion in model container [2022-11-16 12:20:55,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:55" (2/3) ... [2022-11-16 12:20:55,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4147b77d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:20:55, skipping insertion in model container [2022-11-16 12:20:55,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:20:55" (3/3) ... [2022-11-16 12:20:55,957 INFO L112 eAbstractionObserver]: Analyzing ICFG reorder_c11_good-50.i [2022-11-16 12:20:55,983 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:20:55,983 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-11-16 12:20:55,983 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:20:56,103 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-16 12:20:56,158 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 12:20:56,179 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 103 transitions, 228 flow [2022-11-16 12:20:56,184 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 103 transitions, 228 flow [2022-11-16 12:20:56,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 103 transitions, 228 flow [2022-11-16 12:20:56,357 INFO L130 PetriNetUnfolder]: 24/243 cut-off events. [2022-11-16 12:20:56,358 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-16 12:20:56,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 243 events. 24/243 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 892 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 126. Up to 8 conditions per place. [2022-11-16 12:20:56,373 INFO L119 LiptonReduction]: Number of co-enabled transitions 1488 [2022-11-16 12:20:59,988 INFO L134 LiptonReduction]: Checked pairs total: 2068 [2022-11-16 12:20:59,988 INFO L136 LiptonReduction]: Total number of compositions: 90 [2022-11-16 12:20:59,997 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 35 transitions, 92 flow [2022-11-16 12:21:00,029 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 226 states, 166 states have (on average 2.4578313253012047) internal successors, (408), 225 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:00,049 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:21:00,057 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;@7a180841, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:21:00,057 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2022-11-16 12:21:00,061 INFO L276 IsEmpty]: Start isEmpty. Operand has 226 states, 166 states have (on average 2.4578313253012047) internal successors, (408), 225 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:00,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 12:21:00,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:21:00,067 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 12:21:00,068 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 12:21:00,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:00,074 INFO L85 PathProgramCache]: Analyzing trace with hash 12136, now seen corresponding path program 1 times [2022-11-16 12:21:00,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:00,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458095500] [2022-11-16 12:21:00,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:00,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:00,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:00,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:00,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:00,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458095500] [2022-11-16 12:21:00,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458095500] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:21:00,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:21:00,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:21:00,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555439545] [2022-11-16 12:21:00,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:21:00,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:21:00,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:00,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:21:00,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:21:00,565 INFO L87 Difference]: Start difference. First operand has 226 states, 166 states have (on average 2.4578313253012047) internal successors, (408), 225 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:00,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:21:00,691 INFO L93 Difference]: Finished difference Result 162 states and 270 transitions. [2022-11-16 12:21:00,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:21:00,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-16 12:21:00,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:21:00,709 INFO L225 Difference]: With dead ends: 162 [2022-11-16 12:21:00,709 INFO L226 Difference]: Without dead ends: 152 [2022-11-16 12:21:00,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:21:00,717 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:21:00,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 4 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:21:00,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-16 12:21:00,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-11-16 12:21:00,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 123 states have (on average 2.065040650406504) internal successors, (254), 151 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:00,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 254 transitions. [2022-11-16 12:21:00,803 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 254 transitions. Word has length 2 [2022-11-16 12:21:00,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:21:00,804 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 254 transitions. [2022-11-16 12:21:00,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:00,804 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 254 transitions. [2022-11-16 12:21:00,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 12:21:00,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:21:00,805 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 12:21:00,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:21:00,806 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 12:21:00,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:00,806 INFO L85 PathProgramCache]: Analyzing trace with hash 12137, now seen corresponding path program 1 times [2022-11-16 12:21:00,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:00,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532609643] [2022-11-16 12:21:00,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:00,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:00,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:00,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:00,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:00,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532609643] [2022-11-16 12:21:00,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532609643] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:21:00,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:21:00,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:21:00,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881344531] [2022-11-16 12:21:00,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:21:00,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:21:00,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:00,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:21:00,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:21:00,997 INFO L87 Difference]: Start difference. First operand 152 states and 254 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:01,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:21:01,083 INFO L93 Difference]: Finished difference Result 135 states and 229 transitions. [2022-11-16 12:21:01,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:21:01,083 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-16 12:21:01,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:21:01,090 INFO L225 Difference]: With dead ends: 135 [2022-11-16 12:21:01,091 INFO L226 Difference]: Without dead ends: 135 [2022-11-16 12:21:01,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:21:01,095 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:21:01,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 8 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:21:01,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-16 12:21:01,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-11-16 12:21:01,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 112 states have (on average 2.044642857142857) internal successors, (229), 134 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:01,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 229 transitions. [2022-11-16 12:21:01,114 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 229 transitions. Word has length 2 [2022-11-16 12:21:01,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:21:01,114 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 229 transitions. [2022-11-16 12:21:01,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:01,115 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 229 transitions. [2022-11-16 12:21:01,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 12:21:01,115 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:21:01,116 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 12:21:01,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:21:01,116 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 12:21:01,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:01,118 INFO L85 PathProgramCache]: Analyzing trace with hash 361768838, now seen corresponding path program 1 times [2022-11-16 12:21:01,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:01,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494816243] [2022-11-16 12:21:01,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:01,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:01,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:01,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:01,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:01,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494816243] [2022-11-16 12:21:01,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494816243] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:21:01,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279895563] [2022-11-16 12:21:01,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:01,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:01,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:21:01,358 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:21:01,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:21:01,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:01,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 12:21:01,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:21:01,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:21:01,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-16 12:21:01,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:21:01,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:01,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:21:01,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:01,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279895563] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:21:01,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:21:01,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-16 12:21:01,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320162524] [2022-11-16 12:21:01,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:21:01,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:21:01,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:01,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:21:01,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:21:01,785 INFO L87 Difference]: Start difference. First operand 135 states and 229 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:01,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:21:01,829 INFO L93 Difference]: Finished difference Result 11 states and 13 transitions. [2022-11-16 12:21:01,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:21:01,829 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 12:21:01,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:21:01,830 INFO L225 Difference]: With dead ends: 11 [2022-11-16 12:21:01,830 INFO L226 Difference]: Without dead ends: 11 [2022-11-16 12:21:01,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:21:01,832 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 6 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:21:01,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 3 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:21:01,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-16 12:21:01,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-11-16 12:21:01,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 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) [2022-11-16 12:21:01,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-11-16 12:21:01,834 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 5 [2022-11-16 12:21:01,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:21:01,835 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-11-16 12:21:01,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:01,835 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-11-16 12:21:01,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:21:01,835 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:21:01,835 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-16 12:21:01,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 12:21:02,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:02,043 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-16 12:21:02,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:02,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1670067719, now seen corresponding path program 1 times [2022-11-16 12:21:02,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:02,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605517216] [2022-11-16 12:21:02,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:02,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:02,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:21:02,068 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:21:02,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:21:02,101 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:21:02,102 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:21:02,103 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 13 remaining) [2022-11-16 12:21:02,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (11 of 13 remaining) [2022-11-16 12:21:02,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 13 remaining) [2022-11-16 12:21:02,106 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 13 remaining) [2022-11-16 12:21:02,106 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 13 remaining) [2022-11-16 12:21:02,106 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2022-11-16 12:21:02,107 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 13 remaining) [2022-11-16 12:21:02,107 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 13 remaining) [2022-11-16 12:21:02,107 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 13 remaining) [2022-11-16 12:21:02,107 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 13 remaining) [2022-11-16 12:21:02,109 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (2 of 13 remaining) [2022-11-16 12:21:02,110 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 13 remaining) [2022-11-16 12:21:02,110 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 13 remaining) [2022-11-16 12:21:02,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 12:21:02,114 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-16 12:21:02,116 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:21:02,116 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-16 12:21:02,162 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-11-16 12:21:02,165 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 12:21:02,165 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 122 transitions, 292 flow [2022-11-16 12:21:02,165 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 122 transitions, 292 flow [2022-11-16 12:21:02,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 122 transitions, 292 flow [2022-11-16 12:21:02,355 INFO L130 PetriNetUnfolder]: 107/793 cut-off events. [2022-11-16 12:21:02,356 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-11-16 12:21:02,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 890 conditions, 793 events. 107/793 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 4312 event pairs, 2 based on Foata normal form. 0/589 useless extension candidates. Maximal degree in co-relation 468. Up to 32 conditions per place. [2022-11-16 12:21:02,377 INFO L119 LiptonReduction]: Number of co-enabled transitions 3568 [2022-11-16 12:21:05,510 INFO L134 LiptonReduction]: Checked pairs total: 5574 [2022-11-16 12:21:05,510 INFO L136 LiptonReduction]: Total number of compositions: 99 [2022-11-16 12:21:05,511 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 47 places, 46 transitions, 140 flow [2022-11-16 12:21:05,620 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2511 states, 2227 states have (on average 3.0933991917377637) internal successors, (6889), 2510 states have internal predecessors, (6889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:05,627 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:21:05,630 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;@7a180841, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:21:05,633 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2022-11-16 12:21:05,641 INFO L276 IsEmpty]: Start isEmpty. Operand has 2511 states, 2227 states have (on average 3.0933991917377637) internal successors, (6889), 2510 states have internal predecessors, (6889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:05,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 12:21:05,641 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:21:05,642 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 12:21:05,642 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-16 12:21:05,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:05,643 INFO L85 PathProgramCache]: Analyzing trace with hash 19768, now seen corresponding path program 1 times [2022-11-16 12:21:05,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:05,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963166379] [2022-11-16 12:21:05,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:05,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:05,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:05,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:05,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:05,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963166379] [2022-11-16 12:21:05,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963166379] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:21:05,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:21:05,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:21:05,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829283277] [2022-11-16 12:21:05,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:21:05,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:21:05,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:05,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:21:05,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:21:05,749 INFO L87 Difference]: Start difference. First operand has 2511 states, 2227 states have (on average 3.0933991917377637) internal successors, (6889), 2510 states have internal predecessors, (6889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:05,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:21:05,863 INFO L93 Difference]: Finished difference Result 1334 states and 3256 transitions. [2022-11-16 12:21:05,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:21:05,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-16 12:21:05,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:21:05,878 INFO L225 Difference]: With dead ends: 1334 [2022-11-16 12:21:05,879 INFO L226 Difference]: Without dead ends: 1252 [2022-11-16 12:21:05,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:21:05,880 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:21:05,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 6 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:21:05,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2022-11-16 12:21:05,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 1252. [2022-11-16 12:21:05,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1252 states, 1163 states have (on average 2.6362854686156494) internal successors, (3066), 1251 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:06,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1252 states to 1252 states and 3066 transitions. [2022-11-16 12:21:06,003 INFO L78 Accepts]: Start accepts. Automaton has 1252 states and 3066 transitions. Word has length 2 [2022-11-16 12:21:06,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:21:06,003 INFO L495 AbstractCegarLoop]: Abstraction has 1252 states and 3066 transitions. [2022-11-16 12:21:06,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:06,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1252 states and 3066 transitions. [2022-11-16 12:21:06,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 12:21:06,004 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:21:06,004 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 12:21:06,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 12:21:06,005 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-16 12:21:06,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:06,006 INFO L85 PathProgramCache]: Analyzing trace with hash 19769, now seen corresponding path program 1 times [2022-11-16 12:21:06,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:06,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389090197] [2022-11-16 12:21:06,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:06,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:06,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:06,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:06,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:06,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389090197] [2022-11-16 12:21:06,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389090197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:21:06,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:21:06,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:21:06,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177479610] [2022-11-16 12:21:06,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:21:06,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:21:06,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:06,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:21:06,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:21:06,085 INFO L87 Difference]: Start difference. First operand 1252 states and 3066 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:06,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:21:06,172 INFO L93 Difference]: Finished difference Result 1207 states and 2983 transitions. [2022-11-16 12:21:06,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:21:06,173 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-16 12:21:06,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:21:06,182 INFO L225 Difference]: With dead ends: 1207 [2022-11-16 12:21:06,182 INFO L226 Difference]: Without dead ends: 1207 [2022-11-16 12:21:06,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:21:06,183 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:21:06,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 12 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:21:06,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2022-11-16 12:21:06,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 1207. [2022-11-16 12:21:06,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1126 states have (on average 2.649200710479574) internal successors, (2983), 1206 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:06,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 2983 transitions. [2022-11-16 12:21:06,226 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 2983 transitions. Word has length 2 [2022-11-16 12:21:06,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:21:06,226 INFO L495 AbstractCegarLoop]: Abstraction has 1207 states and 2983 transitions. [2022-11-16 12:21:06,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:06,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 2983 transitions. [2022-11-16 12:21:06,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:21:06,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:21:06,227 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 12:21:06,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 12:21:06,228 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-16 12:21:06,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:06,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1089999500, now seen corresponding path program 1 times [2022-11-16 12:21:06,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:06,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483904490] [2022-11-16 12:21:06,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:06,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:06,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:06,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:06,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483904490] [2022-11-16 12:21:06,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483904490] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:21:06,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42630069] [2022-11-16 12:21:06,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:06,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:06,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:21:06,395 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:21:06,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:21:06,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:06,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 12:21:06,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:21:06,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:21:06,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-16 12:21:06,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:21:06,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:06,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:21:06,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:06,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42630069] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:21:06,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:21:06,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-16 12:21:06,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663645871] [2022-11-16 12:21:06,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:21:06,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:21:06,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:06,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:21:06,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:21:06,660 INFO L87 Difference]: Start difference. First operand 1207 states and 2983 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:06,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:21:06,867 INFO L93 Difference]: Finished difference Result 1113 states and 2764 transitions. [2022-11-16 12:21:06,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:21:06,867 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 12:21:06,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:21:06,874 INFO L225 Difference]: With dead ends: 1113 [2022-11-16 12:21:06,874 INFO L226 Difference]: Without dead ends: 1113 [2022-11-16 12:21:06,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:21:06,875 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:21:06,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 26 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:21:06,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2022-11-16 12:21:06,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 1113. [2022-11-16 12:21:06,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1113 states, 1041 states have (on average 2.655139289145053) internal successors, (2764), 1112 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:06,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 2764 transitions. [2022-11-16 12:21:06,942 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 2764 transitions. Word has length 6 [2022-11-16 12:21:06,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:21:06,943 INFO L495 AbstractCegarLoop]: Abstraction has 1113 states and 2764 transitions. [2022-11-16 12:21:06,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:06,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 2764 transitions. [2022-11-16 12:21:06,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:21:06,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:21:06,945 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-16 12:21:06,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:21:07,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:07,152 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-16 12:21:07,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:07,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1473638048, now seen corresponding path program 1 times [2022-11-16 12:21:07,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:07,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192934977] [2022-11-16 12:21:07,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:07,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:07,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:21:07,181 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:21:07,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:21:07,202 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:21:07,202 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:21:07,202 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (13 of 14 remaining) [2022-11-16 12:21:07,203 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (12 of 14 remaining) [2022-11-16 12:21:07,203 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 14 remaining) [2022-11-16 12:21:07,203 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 14 remaining) [2022-11-16 12:21:07,204 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 14 remaining) [2022-11-16 12:21:07,204 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 14 remaining) [2022-11-16 12:21:07,204 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 14 remaining) [2022-11-16 12:21:07,204 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 14 remaining) [2022-11-16 12:21:07,205 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 14 remaining) [2022-11-16 12:21:07,205 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 14 remaining) [2022-11-16 12:21:07,205 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (3 of 14 remaining) [2022-11-16 12:21:07,205 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 14 remaining) [2022-11-16 12:21:07,206 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 14 remaining) [2022-11-16 12:21:07,206 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 14 remaining) [2022-11-16 12:21:07,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 12:21:07,207 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-16 12:21:07,208 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:21:07,208 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-16 12:21:07,263 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2022-11-16 12:21:07,268 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 12:21:07,269 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 135 places, 141 transitions, 360 flow [2022-11-16 12:21:07,271 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 135 places, 141 transitions, 360 flow [2022-11-16 12:21:07,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 141 transitions, 360 flow [2022-11-16 12:21:07,743 INFO L130 PetriNetUnfolder]: 496/2769 cut-off events. [2022-11-16 12:21:07,743 INFO L131 PetriNetUnfolder]: For 419/419 co-relation queries the response was YES. [2022-11-16 12:21:07,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3220 conditions, 2769 events. 496/2769 cut-off events. For 419/419 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 20326 event pairs, 64 based on Foata normal form. 0/2089 useless extension candidates. Maximal degree in co-relation 1654. Up to 192 conditions per place. [2022-11-16 12:21:07,800 INFO L119 LiptonReduction]: Number of co-enabled transitions 6240 [2022-11-16 12:21:10,757 INFO L134 LiptonReduction]: Checked pairs total: 9669 [2022-11-16 12:21:10,758 INFO L136 LiptonReduction]: Total number of compositions: 115 [2022-11-16 12:21:10,759 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 56 places, 55 transitions, 188 flow [2022-11-16 12:21:12,235 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 27399 states, 25927 states have (on average 3.8926987310525707) internal successors, (100926), 27398 states have internal predecessors, (100926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:12,236 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:21:12,236 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;@7a180841, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:21:12,236 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2022-11-16 12:21:12,287 INFO L276 IsEmpty]: Start isEmpty. Operand has 27399 states, 25927 states have (on average 3.8926987310525707) internal successors, (100926), 27398 states have internal predecessors, (100926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:12,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 12:21:12,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:21:12,288 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 12:21:12,288 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 12:21:12,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:12,289 INFO L85 PathProgramCache]: Analyzing trace with hash 28502, now seen corresponding path program 1 times [2022-11-16 12:21:12,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:12,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471839674] [2022-11-16 12:21:12,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:12,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:12,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:12,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:12,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:12,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471839674] [2022-11-16 12:21:12,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471839674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:21:12,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:21:12,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:21:12,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968204367] [2022-11-16 12:21:12,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:21:12,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:21:12,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:12,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:21:12,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:21:12,389 INFO L87 Difference]: Start difference. First operand has 27399 states, 25927 states have (on average 3.8926987310525707) internal successors, (100926), 27398 states have internal predecessors, (100926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:12,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:21:12,756 INFO L93 Difference]: Finished difference Result 10742 states and 34666 transitions. [2022-11-16 12:21:12,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:21:12,756 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-16 12:21:12,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:21:12,858 INFO L225 Difference]: With dead ends: 10742 [2022-11-16 12:21:12,858 INFO L226 Difference]: Without dead ends: 10012 [2022-11-16 12:21:12,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:21:12,859 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 47 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:21:12,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 6 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:21:12,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10012 states. [2022-11-16 12:21:13,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10012 to 10012. [2022-11-16 12:21:13,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10012 states, 9715 states have (on average 3.3430777148739064) internal successors, (32478), 10011 states have internal predecessors, (32478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:13,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10012 states to 10012 states and 32478 transitions. [2022-11-16 12:21:13,491 INFO L78 Accepts]: Start accepts. Automaton has 10012 states and 32478 transitions. Word has length 2 [2022-11-16 12:21:13,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:21:13,492 INFO L495 AbstractCegarLoop]: Abstraction has 10012 states and 32478 transitions. [2022-11-16 12:21:13,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:13,492 INFO L276 IsEmpty]: Start isEmpty. Operand 10012 states and 32478 transitions. [2022-11-16 12:21:13,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 12:21:13,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:21:13,493 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 12:21:13,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 12:21:13,494 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 12:21:13,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:13,495 INFO L85 PathProgramCache]: Analyzing trace with hash 28503, now seen corresponding path program 1 times [2022-11-16 12:21:13,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:13,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474467279] [2022-11-16 12:21:13,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:13,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:13,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:13,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:13,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:13,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474467279] [2022-11-16 12:21:13,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474467279] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:21:13,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:21:13,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:21:13,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629393389] [2022-11-16 12:21:13,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:21:13,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:21:13,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:13,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:21:13,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:21:13,608 INFO L87 Difference]: Start difference. First operand 10012 states and 32478 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:13,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:21:13,902 INFO L93 Difference]: Finished difference Result 9915 states and 32259 transitions. [2022-11-16 12:21:13,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:21:13,903 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-16 12:21:13,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:21:13,979 INFO L225 Difference]: With dead ends: 9915 [2022-11-16 12:21:13,979 INFO L226 Difference]: Without dead ends: 9915 [2022-11-16 12:21:13,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:21:13,980 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:21:13,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 12 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:21:14,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9915 states. [2022-11-16 12:21:14,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9915 to 9915. [2022-11-16 12:21:14,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9915 states, 9628 states have (on average 3.350540091400083) internal successors, (32259), 9914 states have internal predecessors, (32259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:14,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9915 states to 9915 states and 32259 transitions. [2022-11-16 12:21:14,435 INFO L78 Accepts]: Start accepts. Automaton has 9915 states and 32259 transitions. Word has length 2 [2022-11-16 12:21:14,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:21:14,435 INFO L495 AbstractCegarLoop]: Abstraction has 9915 states and 32259 transitions. [2022-11-16 12:21:14,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:14,435 INFO L276 IsEmpty]: Start isEmpty. Operand 9915 states and 32259 transitions. [2022-11-16 12:21:14,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:21:14,436 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:21:14,436 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 12:21:14,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 12:21:14,437 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 12:21:14,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:14,437 INFO L85 PathProgramCache]: Analyzing trace with hash 573811912, now seen corresponding path program 1 times [2022-11-16 12:21:14,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:14,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643774031] [2022-11-16 12:21:14,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:14,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:14,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:14,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:14,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:14,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643774031] [2022-11-16 12:21:14,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643774031] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:21:14,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386993534] [2022-11-16 12:21:14,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:14,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:14,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:21:14,551 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:21:14,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:21:14,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:14,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 12:21:14,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:21:14,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:21:14,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-16 12:21:14,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:21:14,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:14,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:21:14,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:14,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386993534] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:21:14,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:21:14,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-16 12:21:14,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558877241] [2022-11-16 12:21:14,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:21:14,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:21:14,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:14,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:21:14,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:21:14,819 INFO L87 Difference]: Start difference. First operand 9915 states and 32259 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:15,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:21:15,170 INFO L93 Difference]: Finished difference Result 9709 states and 31696 transitions. [2022-11-16 12:21:15,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:21:15,171 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 12:21:15,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:21:15,226 INFO L225 Difference]: With dead ends: 9709 [2022-11-16 12:21:15,227 INFO L226 Difference]: Without dead ends: 9709 [2022-11-16 12:21:15,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:21:15,229 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 45 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:21:15,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 18 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:21:15,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9709 states. [2022-11-16 12:21:15,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9709 to 9709. [2022-11-16 12:21:15,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9709 states, 9434 states have (on average 3.3597625609497563) internal successors, (31696), 9708 states have internal predecessors, (31696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:15,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9709 states to 9709 states and 31696 transitions. [2022-11-16 12:21:15,676 INFO L78 Accepts]: Start accepts. Automaton has 9709 states and 31696 transitions. Word has length 6 [2022-11-16 12:21:15,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:21:15,677 INFO L495 AbstractCegarLoop]: Abstraction has 9709 states and 31696 transitions. [2022-11-16 12:21:15,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:15,677 INFO L276 IsEmpty]: Start isEmpty. Operand 9709 states and 31696 transitions. [2022-11-16 12:21:15,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:21:15,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:21:15,679 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2022-11-16 12:21:15,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:21:15,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:15,885 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 12:21:15,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:15,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1114538612, now seen corresponding path program 1 times [2022-11-16 12:21:15,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:15,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794959065] [2022-11-16 12:21:15,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:15,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:15,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:15,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:15,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:15,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794959065] [2022-11-16 12:21:15,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794959065] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:21:15,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116304754] [2022-11-16 12:21:15,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:15,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:15,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:21:15,950 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:21:15,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:21:16,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:16,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:21:16,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:21:16,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:16,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:21:16,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:16,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116304754] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:21:16,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:21:16,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-11-16 12:21:16,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725927308] [2022-11-16 12:21:16,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:21:16,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:21:16,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:16,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:21:16,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:21:16,118 INFO L87 Difference]: Start difference. First operand 9709 states and 31696 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:16,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:21:16,151 INFO L93 Difference]: Finished difference Result 67 states and 139 transitions. [2022-11-16 12:21:16,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:21:16,152 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:21:16,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:21:16,153 INFO L225 Difference]: With dead ends: 67 [2022-11-16 12:21:16,153 INFO L226 Difference]: Without dead ends: 67 [2022-11-16 12:21:16,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:21:16,154 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 46 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:21:16,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 7 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:21:16,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-16 12:21:16,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-11-16 12:21:16,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.106060606060606) internal successors, (139), 66 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:16,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 139 transitions. [2022-11-16 12:21:16,158 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 139 transitions. Word has length 11 [2022-11-16 12:21:16,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:21:16,158 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 139 transitions. [2022-11-16 12:21:16,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:16,159 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 139 transitions. [2022-11-16 12:21:16,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 12:21:16,160 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:21:16,160 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-16 12:21:16,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:21:16,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:16,365 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 12:21:16,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:16,365 INFO L85 PathProgramCache]: Analyzing trace with hash -766681166, now seen corresponding path program 1 times [2022-11-16 12:21:16,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:16,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393802336] [2022-11-16 12:21:16,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:16,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:16,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:21:16,383 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:21:16,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:21:16,398 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:21:16,399 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:21:16,399 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (14 of 15 remaining) [2022-11-16 12:21:16,399 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (13 of 15 remaining) [2022-11-16 12:21:16,400 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 15 remaining) [2022-11-16 12:21:16,400 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 15 remaining) [2022-11-16 12:21:16,400 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 15 remaining) [2022-11-16 12:21:16,400 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 15 remaining) [2022-11-16 12:21:16,401 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 15 remaining) [2022-11-16 12:21:16,401 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 15 remaining) [2022-11-16 12:21:16,401 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 15 remaining) [2022-11-16 12:21:16,401 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 15 remaining) [2022-11-16 12:21:16,402 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (4 of 15 remaining) [2022-11-16 12:21:16,402 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 15 remaining) [2022-11-16 12:21:16,402 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 15 remaining) [2022-11-16 12:21:16,402 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 15 remaining) [2022-11-16 12:21:16,403 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 15 remaining) [2022-11-16 12:21:16,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 12:21:16,403 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-16 12:21:16,404 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:21:16,404 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-16 12:21:16,435 INFO L144 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2022-11-16 12:21:16,438 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 12:21:16,438 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 153 places, 160 transitions, 432 flow [2022-11-16 12:21:16,439 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 153 places, 160 transitions, 432 flow [2022-11-16 12:21:16,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 160 transitions, 432 flow [2022-11-16 12:21:18,473 INFO L130 PetriNetUnfolder]: 2379/10599 cut-off events. [2022-11-16 12:21:18,474 INFO L131 PetriNetUnfolder]: For 2144/2144 co-relation queries the response was YES. [2022-11-16 12:21:18,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12764 conditions, 10599 events. 2379/10599 cut-off events. For 2144/2144 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 100898 event pairs, 626 based on Foata normal form. 0/8135 useless extension candidates. Maximal degree in co-relation 6333. Up to 1024 conditions per place. [2022-11-16 12:21:18,741 INFO L119 LiptonReduction]: Number of co-enabled transitions 9504 [2022-11-16 12:21:22,339 INFO L134 LiptonReduction]: Checked pairs total: 16158 [2022-11-16 12:21:22,339 INFO L136 LiptonReduction]: Total number of compositions: 129 [2022-11-16 12:21:22,340 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 65 places, 64 transitions, 240 flow [2022-11-16 12:21:35,410 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 310275 states, 302067 states have (on average 4.735177957208169) internal successors, (1430341), 310274 states have internal predecessors, (1430341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:35,414 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:21:35,427 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;@7a180841, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:21:35,427 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2022-11-16 12:21:35,832 INFO L276 IsEmpty]: Start isEmpty. Operand has 310275 states, 302067 states have (on average 4.735177957208169) internal successors, (1430341), 310274 states have internal predecessors, (1430341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:35,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 12:21:35,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:21:35,833 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 12:21:35,833 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-16 12:21:35,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:35,834 INFO L85 PathProgramCache]: Analyzing trace with hash 38292, now seen corresponding path program 1 times [2022-11-16 12:21:35,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:35,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883426935] [2022-11-16 12:21:35,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:35,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:35,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:35,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:35,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:35,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883426935] [2022-11-16 12:21:35,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883426935] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:21:35,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:21:35,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:21:35,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991505545] [2022-11-16 12:21:35,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:21:35,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:21:35,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:35,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:21:35,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:21:36,317 INFO L87 Difference]: Start difference. First operand has 310275 states, 302067 states have (on average 4.735177957208169) internal successors, (1430341), 310274 states have internal predecessors, (1430341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:38,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:21:38,535 INFO L93 Difference]: Finished difference Result 90638 states and 363084 transitions. [2022-11-16 12:21:38,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:21:38,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-16 12:21:38,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:21:40,368 INFO L225 Difference]: With dead ends: 90638 [2022-11-16 12:21:40,368 INFO L226 Difference]: Without dead ends: 84076 [2022-11-16 12:21:40,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:21:40,370 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 55 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:21:40,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 6 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:21:40,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84076 states. [2022-11-16 12:21:43,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84076 to 84076. [2022-11-16 12:21:43,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84076 states, 82991 states have (on average 4.085093564362401) internal successors, (339026), 84075 states have internal predecessors, (339026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:44,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84076 states to 84076 states and 339026 transitions. [2022-11-16 12:21:44,253 INFO L78 Accepts]: Start accepts. Automaton has 84076 states and 339026 transitions. Word has length 2 [2022-11-16 12:21:44,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:21:44,253 INFO L495 AbstractCegarLoop]: Abstraction has 84076 states and 339026 transitions. [2022-11-16 12:21:44,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:44,253 INFO L276 IsEmpty]: Start isEmpty. Operand 84076 states and 339026 transitions. [2022-11-16 12:21:44,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 12:21:44,253 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:21:44,253 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 12:21:44,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 12:21:44,254 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-16 12:21:44,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:44,254 INFO L85 PathProgramCache]: Analyzing trace with hash 38293, now seen corresponding path program 1 times [2022-11-16 12:21:44,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:44,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012500775] [2022-11-16 12:21:44,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:44,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:44,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:44,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:44,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:44,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012500775] [2022-11-16 12:21:44,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012500775] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:21:44,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:21:44,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:21:44,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953049724] [2022-11-16 12:21:44,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:21:44,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:21:44,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:44,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:21:44,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:21:44,351 INFO L87 Difference]: Start difference. First operand 84076 states and 339026 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:45,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:21:45,997 INFO L93 Difference]: Finished difference Result 83875 states and 338483 transitions. [2022-11-16 12:21:45,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:21:45,998 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-16 12:21:45,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:21:46,696 INFO L225 Difference]: With dead ends: 83875 [2022-11-16 12:21:46,696 INFO L226 Difference]: Without dead ends: 83875 [2022-11-16 12:21:46,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:21:46,697 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:21:46,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 12 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:21:46,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83875 states. [2022-11-16 12:21:50,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83875 to 83875. [2022-11-16 12:21:50,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83875 states, 82802 states have (on average 4.087860196613608) internal successors, (338483), 83874 states have internal predecessors, (338483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:50,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83875 states to 83875 states and 338483 transitions. [2022-11-16 12:21:50,690 INFO L78 Accepts]: Start accepts. Automaton has 83875 states and 338483 transitions. Word has length 2 [2022-11-16 12:21:50,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:21:50,690 INFO L495 AbstractCegarLoop]: Abstraction has 83875 states and 338483 transitions. [2022-11-16 12:21:50,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:50,690 INFO L276 IsEmpty]: Start isEmpty. Operand 83875 states and 338483 transitions. [2022-11-16 12:21:50,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:21:50,691 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:21:50,691 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 12:21:50,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 12:21:50,691 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-16 12:21:50,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:50,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1033940465, now seen corresponding path program 1 times [2022-11-16 12:21:50,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:50,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596006363] [2022-11-16 12:21:50,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:50,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:50,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:50,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:50,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:50,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596006363] [2022-11-16 12:21:50,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596006363] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:21:50,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162099344] [2022-11-16 12:21:50,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:50,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:50,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:21:50,788 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:21:50,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:21:50,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:50,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 12:21:50,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:21:50,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:21:50,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-16 12:21:50,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:21:50,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:50,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:21:51,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:51,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162099344] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:21:51,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:21:51,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-16 12:21:51,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297981974] [2022-11-16 12:21:51,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:21:51,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:21:51,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:51,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:21:51,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:21:51,051 INFO L87 Difference]: Start difference. First operand 83875 states and 338483 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:52,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:21:52,760 INFO L93 Difference]: Finished difference Result 83461 states and 337168 transitions. [2022-11-16 12:21:52,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:21:52,761 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 12:21:52,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:21:53,261 INFO L225 Difference]: With dead ends: 83461 [2022-11-16 12:21:53,262 INFO L226 Difference]: Without dead ends: 83461 [2022-11-16 12:21:53,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:21:53,263 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 55 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:21:53,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 18 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:21:53,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83461 states. [2022-11-16 12:21:56,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83461 to 83461. [2022-11-16 12:21:56,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83461 states, 82402 states have (on average 4.091745345986748) internal successors, (337168), 83460 states have internal predecessors, (337168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:57,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83461 states to 83461 states and 337168 transitions. [2022-11-16 12:21:57,363 INFO L78 Accepts]: Start accepts. Automaton has 83461 states and 337168 transitions. Word has length 6 [2022-11-16 12:21:57,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:21:57,363 INFO L495 AbstractCegarLoop]: Abstraction has 83461 states and 337168 transitions. [2022-11-16 12:21:57,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:57,364 INFO L276 IsEmpty]: Start isEmpty. Operand 83461 states and 337168 transitions. [2022-11-16 12:21:57,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:21:57,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:21:57,365 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2022-11-16 12:21:57,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:21:57,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_441acb0b-572d-4c13-885f-508f76d7e48d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 12:21:57,571 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-16 12:21:57,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:57,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1311762098, now seen corresponding path program 1 times [2022-11-16 12:21:57,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:57,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791167755] [2022-11-16 12:21:57,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:57,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:57,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:57,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:21:57,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:57,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791167755] [2022-11-16 12:21:57,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791167755] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:21:57,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:21:57,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:21:57,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840902481] [2022-11-16 12:21:57,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:21:57,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:21:57,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:57,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:21:57,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:21:57,625 INFO L87 Difference]: Start difference. First operand 83461 states and 337168 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:59,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:21:59,325 INFO L93 Difference]: Finished difference Result 76032 states and 309383 transitions. [2022-11-16 12:21:59,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:21:59,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:21:59,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:21:59,859 INFO L225 Difference]: With dead ends: 76032 [2022-11-16 12:21:59,859 INFO L226 Difference]: Without dead ends: 76032 [2022-11-16 12:21:59,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:21:59,860 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 47 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:21:59,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 6 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:22:00,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76032 states. [2022-11-16 12:22:02,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76032 to 76032. [2022-11-16 12:22:02,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76032 states, 75244 states have (on average 4.111729838924034) internal successors, (309383), 76031 states have internal predecessors, (309383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)