./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/08_rand_cas.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06b4d3e-488a-4b0d-b748-9d8c3fbe78ff/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06b4d3e-488a-4b0d-b748-9d8c3fbe78ff/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06b4d3e-488a-4b0d-b748-9d8c3fbe78ff/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06b4d3e-488a-4b0d-b748-9d8c3fbe78ff/bin/uautomizer-TMbwUNV5ro/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/08_rand_cas.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06b4d3e-488a-4b0d-b748-9d8c3fbe78ff/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06b4d3e-488a-4b0d-b748-9d8c3fbe78ff/bin/uautomizer-TMbwUNV5ro --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 adb74bb4036ab42451aee4c4c2c855416fb34747e80c1114ce822e44c6b19376 --- 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-8393723 [2022-11-18 20:56:47,053 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:56:47,055 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:56:47,082 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:56:47,086 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:56:47,090 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:56:47,094 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:56:47,107 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:56:47,110 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:56:47,117 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:56:47,119 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:56:47,122 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:56:47,123 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:56:47,126 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:56:47,129 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:56:47,132 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:56:47,134 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:56:47,135 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:56:47,137 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:56:47,147 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:56:47,149 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:56:47,151 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:56:47,152 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:56:47,153 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:56:47,157 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:56:47,158 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:56:47,158 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:56:47,159 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:56:47,160 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:56:47,161 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:56:47,161 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:56:47,162 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:56:47,163 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:56:47,164 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:56:47,165 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:56:47,166 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:56:47,167 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:56:47,167 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:56:47,167 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:56:47,168 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:56:47,169 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:56:47,171 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06b4d3e-488a-4b0d-b748-9d8c3fbe78ff/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-18 20:56:47,211 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:56:47,211 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:56:47,212 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:56:47,212 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:56:47,214 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:56:47,214 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:56:47,215 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:56:47,215 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:56:47,215 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:56:47,215 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:56:47,217 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:56:47,217 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 20:56:47,217 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:56:47,218 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:56:47,218 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:56:47,218 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-18 20:56:47,218 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-18 20:56:47,218 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-18 20:56:47,219 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:56:47,219 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 20:56:47,219 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:56:47,219 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:56:47,220 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:56:47,220 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:56:47,220 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:56:47,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:56:47,222 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:56:47,222 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:56:47,223 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:56:47,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:56:47,223 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_c06b4d3e-488a-4b0d-b748-9d8c3fbe78ff/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06b4d3e-488a-4b0d-b748-9d8c3fbe78ff/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> adb74bb4036ab42451aee4c4c2c855416fb34747e80c1114ce822e44c6b19376 [2022-11-18 20:56:47,579 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:56:47,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:56:47,610 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:56:47,612 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:56:47,615 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:56:47,616 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06b4d3e-488a-4b0d-b748-9d8c3fbe78ff/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/pthread-ext/08_rand_cas.i [2022-11-18 20:56:47,718 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06b4d3e-488a-4b0d-b748-9d8c3fbe78ff/bin/uautomizer-TMbwUNV5ro/data/499ba301d/9a44110e83174537ad594c36533038dd/FLAG964096914 [2022-11-18 20:56:48,334 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:56:48,334 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06b4d3e-488a-4b0d-b748-9d8c3fbe78ff/sv-benchmarks/c/pthread-ext/08_rand_cas.i [2022-11-18 20:56:48,350 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06b4d3e-488a-4b0d-b748-9d8c3fbe78ff/bin/uautomizer-TMbwUNV5ro/data/499ba301d/9a44110e83174537ad594c36533038dd/FLAG964096914 [2022-11-18 20:56:48,609 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06b4d3e-488a-4b0d-b748-9d8c3fbe78ff/bin/uautomizer-TMbwUNV5ro/data/499ba301d/9a44110e83174537ad594c36533038dd [2022-11-18 20:56:48,612 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:56:48,614 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:56:48,617 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:56:48,617 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:56:48,621 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:56:48,622 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:56:48" (1/1) ... [2022-11-18 20:56:48,624 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@428a7033 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:56:48, skipping insertion in model container [2022-11-18 20:56:48,624 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:56:48" (1/1) ... [2022-11-18 20:56:48,634 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:56:48,712 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:56:49,255 WARN L234 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_c06b4d3e-488a-4b0d-b748-9d8c3fbe78ff/sv-benchmarks/c/pthread-ext/08_rand_cas.i[30697,30710] [2022-11-18 20:56:49,269 WARN L234 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_c06b4d3e-488a-4b0d-b748-9d8c3fbe78ff/sv-benchmarks/c/pthread-ext/08_rand_cas.i[30970,30983] [2022-11-18 20:56:49,272 WARN L234 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_c06b4d3e-488a-4b0d-b748-9d8c3fbe78ff/sv-benchmarks/c/pthread-ext/08_rand_cas.i[31233,31246] [2022-11-18 20:56:49,281 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:56:49,292 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:56:49,339 WARN L234 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_c06b4d3e-488a-4b0d-b748-9d8c3fbe78ff/sv-benchmarks/c/pthread-ext/08_rand_cas.i[30697,30710] [2022-11-18 20:56:49,348 WARN L234 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_c06b4d3e-488a-4b0d-b748-9d8c3fbe78ff/sv-benchmarks/c/pthread-ext/08_rand_cas.i[30970,30983] [2022-11-18 20:56:49,356 WARN L234 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_c06b4d3e-488a-4b0d-b748-9d8c3fbe78ff/sv-benchmarks/c/pthread-ext/08_rand_cas.i[31233,31246] [2022-11-18 20:56:49,359 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:56:49,406 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:56:49,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:56:49 WrapperNode [2022-11-18 20:56:49,407 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:56:49,409 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:56:49,409 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:56:49,409 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:56:49,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:56:49" (1/1) ... [2022-11-18 20:56:49,460 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:56:49" (1/1) ... [2022-11-18 20:56:49,509 INFO L138 Inliner]: procedures = 176, calls = 34, calls flagged for inlining = 13, calls inlined = 14, statements flattened = 141 [2022-11-18 20:56:49,510 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:56:49,511 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:56:49,511 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:56:49,512 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:56:49,523 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:56:49" (1/1) ... [2022-11-18 20:56:49,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:56:49" (1/1) ... [2022-11-18 20:56:49,541 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:56:49" (1/1) ... [2022-11-18 20:56:49,542 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:56:49" (1/1) ... [2022-11-18 20:56:49,547 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:56:49" (1/1) ... [2022-11-18 20:56:49,552 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:56:49" (1/1) ... [2022-11-18 20:56:49,572 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:56:49" (1/1) ... [2022-11-18 20:56:49,574 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:56:49" (1/1) ... [2022-11-18 20:56:49,577 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:56:49,578 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:56:49,578 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:56:49,578 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:56:49,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:56:49" (1/1) ... [2022-11-18 20:56:49,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:56:49,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06b4d3e-488a-4b0d-b748-9d8c3fbe78ff/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:56:49,633 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06b4d3e-488a-4b0d-b748-9d8c3fbe78ff/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:56:49,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c06b4d3e-488a-4b0d-b748-9d8c3fbe78ff/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:56:49,700 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:56:49,701 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-18 20:56:49,701 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-18 20:56:49,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:56:49,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:56:49,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:56:49,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:56:49,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:56:49,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:56:49,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:56:49,710 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 20:56:49,867 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:56:49,870 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:56:50,243 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:56:50,402 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:56:50,412 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-18 20:56:50,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:56:50 BoogieIcfgContainer [2022-11-18 20:56:50,415 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:56:50,418 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:56:50,418 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:56:50,426 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:56:50,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:56:48" (1/3) ... [2022-11-18 20:56:50,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cb35cec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:56:50, skipping insertion in model container [2022-11-18 20:56:50,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:56:49" (2/3) ... [2022-11-18 20:56:50,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cb35cec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:56:50, skipping insertion in model container [2022-11-18 20:56:50,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:56:50" (3/3) ... [2022-11-18 20:56:50,429 INFO L112 eAbstractionObserver]: Analyzing ICFG 08_rand_cas.i [2022-11-18 20:56:50,455 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:56:50,455 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2022-11-18 20:56:50,456 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 20:56:50,629 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 20:56:50,679 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-18 20:56:50,694 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 141 places, 151 transitions, 307 flow [2022-11-18 20:56:50,697 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 141 places, 151 transitions, 307 flow [2022-11-18 20:56:50,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 151 transitions, 307 flow [2022-11-18 20:56:50,805 INFO L130 PetriNetUnfolder]: 14/167 cut-off events. [2022-11-18 20:56:50,806 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 20:56:50,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 167 events. 14/167 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 337 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 130. Up to 4 conditions per place. [2022-11-18 20:56:50,819 INFO L119 LiptonReduction]: Number of co-enabled transitions 4256 [2022-11-18 20:57:02,626 INFO L134 LiptonReduction]: Checked pairs total: 5722 [2022-11-18 20:57:02,627 INFO L136 LiptonReduction]: Total number of compositions: 180 [2022-11-18 20:57:02,636 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 41 transitions, 87 flow [2022-11-18 20:57:02,666 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 221 states, 119 states have (on average 3.7563025210084033) internal successors, (447), 220 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:02,687 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:57:02,695 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;@6aacb752, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:57:02,695 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2022-11-18 20:57:02,698 INFO L276 IsEmpty]: Start isEmpty. Operand has 221 states, 119 states have (on average 3.7563025210084033) internal successors, (447), 220 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:02,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-18 20:57:02,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:02,705 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-18 20:57:02,706 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-18 20:57:02,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:02,712 INFO L85 PathProgramCache]: Analyzing trace with hash 25676, now seen corresponding path program 1 times [2022-11-18 20:57:02,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:57:02,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318710448] [2022-11-18 20:57:02,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:02,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:57:02,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:02,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:57:02,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:57:02,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318710448] [2022-11-18 20:57:02,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318710448] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:57:02,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:57:02,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 20:57:02,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948499121] [2022-11-18 20:57:02,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:57:02,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:57:02,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:57:02,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:57:02,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:57:02,939 INFO L87 Difference]: Start difference. First operand has 221 states, 119 states have (on average 3.7563025210084033) internal successors, (447), 220 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 2.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:03,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:57:03,025 INFO L93 Difference]: Finished difference Result 143 states and 276 transitions. [2022-11-18 20:57:03,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:57:03,028 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 2.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-18 20:57:03,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:57:03,040 INFO L225 Difference]: With dead ends: 143 [2022-11-18 20:57:03,040 INFO L226 Difference]: Without dead ends: 143 [2022-11-18 20:57:03,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:57:03,045 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:57:03,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:57:03,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-18 20:57:03,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-11-18 20:57:03,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 93 states have (on average 2.967741935483871) internal successors, (276), 142 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:03,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 276 transitions. [2022-11-18 20:57:03,096 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 276 transitions. Word has length 2 [2022-11-18 20:57:03,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:57:03,097 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 276 transitions. [2022-11-18 20:57:03,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 2.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:03,097 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 276 transitions. [2022-11-18 20:57:03,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-18 20:57:03,098 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:03,098 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-18 20:57:03,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:57:03,099 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-18 20:57:03,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:03,100 INFO L85 PathProgramCache]: Analyzing trace with hash 25671, now seen corresponding path program 1 times [2022-11-18 20:57:03,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:57:03,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573179504] [2022-11-18 20:57:03,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:03,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:57:03,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:03,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:57:03,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:57:03,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573179504] [2022-11-18 20:57:03,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573179504] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:57:03,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:57:03,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 20:57:03,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437975959] [2022-11-18 20:57:03,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:57:03,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:57:03,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:57:03,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:57:03,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:57:03,196 INFO L87 Difference]: Start difference. First operand 143 states and 276 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) [2022-11-18 20:57:03,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:57:03,284 INFO L93 Difference]: Finished difference Result 131 states and 241 transitions. [2022-11-18 20:57:03,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:57:03,285 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 [2022-11-18 20:57:03,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:57:03,288 INFO L225 Difference]: With dead ends: 131 [2022-11-18 20:57:03,288 INFO L226 Difference]: Without dead ends: 131 [2022-11-18 20:57:03,289 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 [2022-11-18 20:57:03,290 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 29 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:57:03,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 2 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:57:03,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-18 20:57:03,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 124. [2022-11-18 20:57:03,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 89 states have (on average 2.6292134831460676) internal successors, (234), 123 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:03,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 234 transitions. [2022-11-18 20:57:03,306 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 234 transitions. Word has length 2 [2022-11-18 20:57:03,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:57:03,306 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 234 transitions. [2022-11-18 20:57:03,307 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) [2022-11-18 20:57:03,307 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 234 transitions. [2022-11-18 20:57:03,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-18 20:57:03,308 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:03,308 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-18 20:57:03,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:57:03,309 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-18 20:57:03,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:03,309 INFO L85 PathProgramCache]: Analyzing trace with hash 25672, now seen corresponding path program 1 times [2022-11-18 20:57:03,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:57:03,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352375224] [2022-11-18 20:57:03,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:03,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:57:03,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:03,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:57:03,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:57:03,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352375224] [2022-11-18 20:57:03,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352375224] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:57:03,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:57:03,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 20:57:03,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811614003] [2022-11-18 20:57:03,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:57:03,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:57:03,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:57:03,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:57:03,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:57:03,441 INFO L87 Difference]: Start difference. First operand 124 states and 234 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) [2022-11-18 20:57:03,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:57:03,514 INFO L93 Difference]: Finished difference Result 100 states and 183 transitions. [2022-11-18 20:57:03,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:57:03,515 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 [2022-11-18 20:57:03,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:57:03,516 INFO L225 Difference]: With dead ends: 100 [2022-11-18 20:57:03,517 INFO L226 Difference]: Without dead ends: 100 [2022-11-18 20:57:03,517 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 [2022-11-18 20:57:03,518 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:57:03,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 1 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:57:03,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-18 20:57:03,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-11-18 20:57:03,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 82 states have (on average 2.231707317073171) internal successors, (183), 99 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:03,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 183 transitions. [2022-11-18 20:57:03,529 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 183 transitions. Word has length 2 [2022-11-18 20:57:03,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:57:03,529 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 183 transitions. [2022-11-18 20:57:03,529 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) [2022-11-18 20:57:03,530 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 183 transitions. [2022-11-18 20:57:03,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-18 20:57:03,530 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:03,531 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-18 20:57:03,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 20:57:03,531 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-18 20:57:03,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:03,532 INFO L85 PathProgramCache]: Analyzing trace with hash 24688470, now seen corresponding path program 1 times [2022-11-18 20:57:03,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:57:03,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178184242] [2022-11-18 20:57:03,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:03,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:57:03,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:03,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:57:03,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:57:03,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178184242] [2022-11-18 20:57:03,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178184242] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:57:03,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:57:03,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:57:03,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878816963] [2022-11-18 20:57:03,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:57:03,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:57:03,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:57:03,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:57:03,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:57:03,704 INFO L87 Difference]: Start difference. First operand 100 states and 183 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:03,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:57:03,825 INFO L93 Difference]: Finished difference Result 86 states and 156 transitions. [2022-11-18 20:57:03,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:57:03,825 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-18 20:57:03,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:57:03,828 INFO L225 Difference]: With dead ends: 86 [2022-11-18 20:57:03,828 INFO L226 Difference]: Without dead ends: 86 [2022-11-18 20:57:03,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:57:03,831 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 42 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:57:03,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 3 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:57:03,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-18 20:57:03,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2022-11-18 20:57:03,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 70 states have (on average 2.2142857142857144) internal successors, (155), 83 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:03,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 155 transitions. [2022-11-18 20:57:03,846 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 155 transitions. Word has length 4 [2022-11-18 20:57:03,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:57:03,847 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 155 transitions. [2022-11-18 20:57:03,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:03,847 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 155 transitions. [2022-11-18 20:57:03,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-18 20:57:03,848 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:03,848 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-18 20:57:03,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 20:57:03,849 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-18 20:57:03,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:03,849 INFO L85 PathProgramCache]: Analyzing trace with hash 24688469, now seen corresponding path program 1 times [2022-11-18 20:57:03,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:57:03,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841167213] [2022-11-18 20:57:03,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:03,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:57:03,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:04,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:57:04,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:57:04,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841167213] [2022-11-18 20:57:04,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841167213] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:57:04,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:57:04,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 20:57:04,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924634172] [2022-11-18 20:57:04,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:57:04,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:57:04,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:57:04,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:57:04,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:57:04,026 INFO L87 Difference]: Start difference. First operand 84 states and 155 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:04,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:57:04,081 INFO L93 Difference]: Finished difference Result 68 states and 127 transitions. [2022-11-18 20:57:04,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:57:04,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-18 20:57:04,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:57:04,083 INFO L225 Difference]: With dead ends: 68 [2022-11-18 20:57:04,084 INFO L226 Difference]: Without dead ends: 68 [2022-11-18 20:57:04,084 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 [2022-11-18 20:57:04,085 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:57:04,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 1 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:57:04,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-18 20:57:04,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-11-18 20:57:04,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 58 states have (on average 2.189655172413793) internal successors, (127), 67 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:04,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 127 transitions. [2022-11-18 20:57:04,093 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 127 transitions. Word has length 4 [2022-11-18 20:57:04,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:57:04,094 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 127 transitions. [2022-11-18 20:57:04,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:04,094 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 127 transitions. [2022-11-18 20:57:04,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-18 20:57:04,094 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:04,095 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-18 20:57:04,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 20:57:04,095 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err4ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-18 20:57:04,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:04,096 INFO L85 PathProgramCache]: Analyzing trace with hash 765344428, now seen corresponding path program 1 times [2022-11-18 20:57:04,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:57:04,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722961861] [2022-11-18 20:57:04,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:04,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:57:04,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:04,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:57:04,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:57:04,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722961861] [2022-11-18 20:57:04,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722961861] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:57:04,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:57:04,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:57:04,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568990926] [2022-11-18 20:57:04,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:57:04,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:57:04,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:57:04,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:57:04,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:57:04,219 INFO L87 Difference]: Start difference. First operand 68 states and 127 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:04,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:57:04,274 INFO L93 Difference]: Finished difference Result 68 states and 126 transitions. [2022-11-18 20:57:04,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:57:04,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-18 20:57:04,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:57:04,276 INFO L225 Difference]: With dead ends: 68 [2022-11-18 20:57:04,276 INFO L226 Difference]: Without dead ends: 68 [2022-11-18 20:57:04,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:57:04,277 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:57:04,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 3 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:57:04,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-18 20:57:04,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-11-18 20:57:04,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 58 states have (on average 2.1724137931034484) internal successors, (126), 67 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:04,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 126 transitions. [2022-11-18 20:57:04,282 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 126 transitions. Word has length 5 [2022-11-18 20:57:04,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:57:04,283 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 126 transitions. [2022-11-18 20:57:04,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:04,283 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 126 transitions. [2022-11-18 20:57:04,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 20:57:04,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:04,284 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 20:57:04,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 20:57:04,285 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-18 20:57:04,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:04,285 INFO L85 PathProgramCache]: Analyzing trace with hash -2044137750, now seen corresponding path program 1 times [2022-11-18 20:57:04,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:57:04,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853483717] [2022-11-18 20:57:04,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:04,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:57:04,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:04,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:57:04,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:57:04,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853483717] [2022-11-18 20:57:04,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853483717] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:57:04,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:57:04,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:57:04,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011641189] [2022-11-18 20:57:04,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:57:04,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:57:04,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:57:04,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:57:04,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:57:04,327 INFO L87 Difference]: Start difference. First operand 68 states and 126 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:04,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:57:04,343 INFO L93 Difference]: Finished difference Result 19 states and 30 transitions. [2022-11-18 20:57:04,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:57:04,344 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-18 20:57:04,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:57:04,344 INFO L225 Difference]: With dead ends: 19 [2022-11-18 20:57:04,345 INFO L226 Difference]: Without dead ends: 19 [2022-11-18 20:57:04,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:57:04,346 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 3 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:57:04,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 2 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:57:04,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-18 20:57:04,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-18 20:57:04,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:04,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 30 transitions. [2022-11-18 20:57:04,349 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 30 transitions. Word has length 6 [2022-11-18 20:57:04,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:57:04,349 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 30 transitions. [2022-11-18 20:57:04,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:04,349 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 30 transitions. [2022-11-18 20:57:04,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 20:57:04,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:04,350 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-18 20:57:04,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 20:57:04,351 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-18 20:57:04,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:04,351 INFO L85 PathProgramCache]: Analyzing trace with hash -2044240136, now seen corresponding path program 1 times [2022-11-18 20:57:04,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:57:04,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715638992] [2022-11-18 20:57:04,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:04,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:57:04,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:57:04,363 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:57:04,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:57:04,389 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:57:04,389 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 20:57:04,391 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (41 of 42 remaining) [2022-11-18 20:57:04,393 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 42 remaining) [2022-11-18 20:57:04,393 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 42 remaining) [2022-11-18 20:57:04,394 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 42 remaining) [2022-11-18 20:57:04,394 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 42 remaining) [2022-11-18 20:57:04,394 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (36 of 42 remaining) [2022-11-18 20:57:04,394 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 42 remaining) [2022-11-18 20:57:04,394 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 42 remaining) [2022-11-18 20:57:04,395 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18ASSERT_VIOLATIONMEMORY_LEAK (33 of 42 remaining) [2022-11-18 20:57:04,395 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONMEMORY_LEAK (32 of 42 remaining) [2022-11-18 20:57:04,395 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 42 remaining) [2022-11-18 20:57:04,395 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 42 remaining) [2022-11-18 20:57:04,396 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 42 remaining) [2022-11-18 20:57:04,396 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 42 remaining) [2022-11-18 20:57:04,396 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 42 remaining) [2022-11-18 20:57:04,397 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 42 remaining) [2022-11-18 20:57:04,397 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 42 remaining) [2022-11-18 20:57:04,397 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 42 remaining) [2022-11-18 20:57:04,397 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 42 remaining) [2022-11-18 20:57:04,398 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 42 remaining) [2022-11-18 20:57:04,398 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (21 of 42 remaining) [2022-11-18 20:57:04,398 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 42 remaining) [2022-11-18 20:57:04,398 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 42 remaining) [2022-11-18 20:57:04,399 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 42 remaining) [2022-11-18 20:57:04,399 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 42 remaining) [2022-11-18 20:57:04,399 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 42 remaining) [2022-11-18 20:57:04,399 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 42 remaining) [2022-11-18 20:57:04,400 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (14 of 42 remaining) [2022-11-18 20:57:04,400 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 42 remaining) [2022-11-18 20:57:04,400 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 42 remaining) [2022-11-18 20:57:04,400 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18ASSERT_VIOLATIONMEMORY_LEAK (11 of 42 remaining) [2022-11-18 20:57:04,401 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONMEMORY_LEAK (10 of 42 remaining) [2022-11-18 20:57:04,401 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 42 remaining) [2022-11-18 20:57:04,401 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 42 remaining) [2022-11-18 20:57:04,401 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 42 remaining) [2022-11-18 20:57:04,401 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 42 remaining) [2022-11-18 20:57:04,402 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 42 remaining) [2022-11-18 20:57:04,402 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 42 remaining) [2022-11-18 20:57:04,402 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 42 remaining) [2022-11-18 20:57:04,402 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 42 remaining) [2022-11-18 20:57:04,403 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 42 remaining) [2022-11-18 20:57:04,403 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 42 remaining) [2022-11-18 20:57:04,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 20:57:04,406 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:57:04,408 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 20:57:04,408 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-18 20:57:04,477 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 20:57:04,491 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-18 20:57:04,491 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 244 places, 264 transitions, 540 flow [2022-11-18 20:57:04,492 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 244 places, 264 transitions, 540 flow [2022-11-18 20:57:04,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 244 places, 264 transitions, 540 flow [2022-11-18 20:57:04,608 INFO L130 PetriNetUnfolder]: 27/298 cut-off events. [2022-11-18 20:57:04,609 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 20:57:04,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308 conditions, 298 events. 27/298 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 976 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 242. Up to 6 conditions per place. [2022-11-18 20:57:04,637 INFO L119 LiptonReduction]: Number of co-enabled transitions 33824 [2022-11-18 20:57:21,810 INFO L134 LiptonReduction]: Checked pairs total: 47537 [2022-11-18 20:57:21,810 INFO L136 LiptonReduction]: Total number of compositions: 291 [2022-11-18 20:57:21,814 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 79 places, 86 transitions, 184 flow [2022-11-18 20:57:22,217 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 9772 states, 7691 states have (on average 4.023403978676375) internal successors, (30944), 9771 states have internal predecessors, (30944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:22,219 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:57:22,220 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;@6aacb752, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:57:22,220 INFO L358 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2022-11-18 20:57:22,260 INFO L276 IsEmpty]: Start isEmpty. Operand has 9772 states, 7691 states have (on average 4.023403978676375) internal successors, (30944), 9771 states have internal predecessors, (30944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:22,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-18 20:57:22,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:22,271 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-18 20:57:22,271 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-11-18 20:57:22,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:22,272 INFO L85 PathProgramCache]: Analyzing trace with hash 46827, now seen corresponding path program 1 times [2022-11-18 20:57:22,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:57:22,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124040894] [2022-11-18 20:57:22,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:22,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:57:22,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:22,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:57:22,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:57:22,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124040894] [2022-11-18 20:57:22,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124040894] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:57:22,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:57:22,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 20:57:22,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394245213] [2022-11-18 20:57:22,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:57:22,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:57:22,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:57:22,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:57:22,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:57:22,341 INFO L87 Difference]: Start difference. First operand has 9772 states, 7691 states have (on average 4.023403978676375) internal successors, (30944), 9771 states have internal predecessors, (30944), 0 states have call successors, (0), 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) [2022-11-18 20:57:22,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:57:22,778 INFO L93 Difference]: Finished difference Result 6719 states and 19704 transitions. [2022-11-18 20:57:22,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:57:22,778 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 [2022-11-18 20:57:22,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:57:22,851 INFO L225 Difference]: With dead ends: 6719 [2022-11-18 20:57:22,851 INFO L226 Difference]: Without dead ends: 6719 [2022-11-18 20:57:22,851 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 [2022-11-18 20:57:22,853 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 70 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:57:22,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 10 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:57:22,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6719 states. [2022-11-18 20:57:23,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6719 to 6258. [2022-11-18 20:57:23,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6258 states, 5521 states have (on average 3.3919579786270604) internal successors, (18727), 6257 states have internal predecessors, (18727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:23,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6258 states to 6258 states and 18727 transitions. [2022-11-18 20:57:23,242 INFO L78 Accepts]: Start accepts. Automaton has 6258 states and 18727 transitions. Word has length 2 [2022-11-18 20:57:23,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:57:23,242 INFO L495 AbstractCegarLoop]: Abstraction has 6258 states and 18727 transitions. [2022-11-18 20:57:23,243 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) [2022-11-18 20:57:23,243 INFO L276 IsEmpty]: Start isEmpty. Operand 6258 states and 18727 transitions. [2022-11-18 20:57:23,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-18 20:57:23,244 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:23,244 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-18 20:57:23,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-18 20:57:23,244 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-11-18 20:57:23,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:23,245 INFO L85 PathProgramCache]: Analyzing trace with hash 46829, now seen corresponding path program 1 times [2022-11-18 20:57:23,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:57:23,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028636333] [2022-11-18 20:57:23,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:23,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:57:23,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:23,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:57:23,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:57:23,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028636333] [2022-11-18 20:57:23,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028636333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:57:23,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:57:23,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 20:57:23,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064332899] [2022-11-18 20:57:23,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:57:23,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:57:23,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:57:23,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:57:23,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:57:23,302 INFO L87 Difference]: Start difference. First operand 6258 states and 18727 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) [2022-11-18 20:57:23,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:57:23,528 INFO L93 Difference]: Finished difference Result 5296 states and 15575 transitions. [2022-11-18 20:57:23,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:57:23,528 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 [2022-11-18 20:57:23,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:57:23,571 INFO L225 Difference]: With dead ends: 5296 [2022-11-18 20:57:23,571 INFO L226 Difference]: Without dead ends: 5296 [2022-11-18 20:57:23,571 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 [2022-11-18 20:57:23,573 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 72 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:57:23,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 5 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:57:23,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5296 states. [2022-11-18 20:57:23,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5296 to 5296. [2022-11-18 20:57:23,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5296 states, 4902 states have (on average 3.1772745818033457) internal successors, (15575), 5295 states have internal predecessors, (15575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:23,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5296 states to 5296 states and 15575 transitions. [2022-11-18 20:57:23,864 INFO L78 Accepts]: Start accepts. Automaton has 5296 states and 15575 transitions. Word has length 2 [2022-11-18 20:57:23,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:57:23,864 INFO L495 AbstractCegarLoop]: Abstraction has 5296 states and 15575 transitions. [2022-11-18 20:57:23,864 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) [2022-11-18 20:57:23,865 INFO L276 IsEmpty]: Start isEmpty. Operand 5296 states and 15575 transitions. [2022-11-18 20:57:23,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-18 20:57:23,865 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:23,865 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-18 20:57:23,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-18 20:57:23,866 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-11-18 20:57:23,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:23,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1396215250, now seen corresponding path program 1 times [2022-11-18 20:57:23,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:57:23,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304641118] [2022-11-18 20:57:23,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:23,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:57:23,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:23,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:57:23,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:57:23,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304641118] [2022-11-18 20:57:23,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304641118] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:57:23,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:57:23,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:57:23,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816663569] [2022-11-18 20:57:23,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:57:23,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:57:23,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:57:23,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:57:23,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:57:23,968 INFO L87 Difference]: Start difference. First operand 5296 states and 15575 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:24,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:57:24,451 INFO L93 Difference]: Finished difference Result 5065 states and 14507 transitions. [2022-11-18 20:57:24,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:57:24,452 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-18 20:57:24,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:57:24,493 INFO L225 Difference]: With dead ends: 5065 [2022-11-18 20:57:24,493 INFO L226 Difference]: Without dead ends: 5065 [2022-11-18 20:57:24,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:57:24,494 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 149 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:57:24,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 19 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 20:57:24,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5065 states. [2022-11-18 20:57:24,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5065 to 4486. [2022-11-18 20:57:24,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4486 states, 4204 states have (on average 3.227640342530923) internal successors, (13569), 4485 states have internal predecessors, (13569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:24,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4486 states to 4486 states and 13569 transitions. [2022-11-18 20:57:24,795 INFO L78 Accepts]: Start accepts. Automaton has 4486 states and 13569 transitions. Word has length 5 [2022-11-18 20:57:24,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:57:24,796 INFO L495 AbstractCegarLoop]: Abstraction has 4486 states and 13569 transitions. [2022-11-18 20:57:24,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:24,796 INFO L276 IsEmpty]: Start isEmpty. Operand 4486 states and 13569 transitions. [2022-11-18 20:57:24,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-18 20:57:24,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:24,797 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-18 20:57:24,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-18 20:57:24,798 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-11-18 20:57:24,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:24,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1396215251, now seen corresponding path program 1 times [2022-11-18 20:57:24,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:57:24,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148466457] [2022-11-18 20:57:24,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:24,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:57:24,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:24,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:57:24,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:57:24,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148466457] [2022-11-18 20:57:24,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148466457] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:57:24,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:57:24,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:57:24,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227199688] [2022-11-18 20:57:24,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:57:24,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:57:24,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:57:24,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:57:24,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:57:24,907 INFO L87 Difference]: Start difference. First operand 4486 states and 13569 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:25,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:57:25,059 INFO L93 Difference]: Finished difference Result 3418 states and 10365 transitions. [2022-11-18 20:57:25,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:57:25,059 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-18 20:57:25,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:57:25,084 INFO L225 Difference]: With dead ends: 3418 [2022-11-18 20:57:25,084 INFO L226 Difference]: Without dead ends: 3418 [2022-11-18 20:57:25,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:57:25,085 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 125 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:57:25,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 5 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:57:25,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3418 states. [2022-11-18 20:57:25,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3418 to 3418. [2022-11-18 20:57:25,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3418 states, 3248 states have (on average 3.1911945812807883) internal successors, (10365), 3417 states have internal predecessors, (10365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:25,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3418 states to 3418 states and 10365 transitions. [2022-11-18 20:57:25,247 INFO L78 Accepts]: Start accepts. Automaton has 3418 states and 10365 transitions. Word has length 5 [2022-11-18 20:57:25,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:57:25,247 INFO L495 AbstractCegarLoop]: Abstraction has 3418 states and 10365 transitions. [2022-11-18 20:57:25,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:25,248 INFO L276 IsEmpty]: Start isEmpty. Operand 3418 states and 10365 transitions. [2022-11-18 20:57:25,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-18 20:57:25,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:25,250 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:57:25,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-18 20:57:25,250 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err4ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-11-18 20:57:25,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:25,251 INFO L85 PathProgramCache]: Analyzing trace with hash -2108502583, now seen corresponding path program 1 times [2022-11-18 20:57:25,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:57:25,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433639662] [2022-11-18 20:57:25,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:25,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:57:25,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:25,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:57:25,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:57:25,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433639662] [2022-11-18 20:57:25,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433639662] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:57:25,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:57:25,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:57:25,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979543853] [2022-11-18 20:57:25,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:57:25,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:57:25,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:57:25,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:57:25,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:57:25,312 INFO L87 Difference]: Start difference. First operand 3418 states and 10365 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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) [2022-11-18 20:57:25,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:57:25,652 INFO L93 Difference]: Finished difference Result 3814 states and 11477 transitions. [2022-11-18 20:57:25,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:57:25,653 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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 8 [2022-11-18 20:57:25,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:57:25,683 INFO L225 Difference]: With dead ends: 3814 [2022-11-18 20:57:25,683 INFO L226 Difference]: Without dead ends: 3814 [2022-11-18 20:57:25,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:57:25,685 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 68 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:57:25,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 36 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:57:25,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3814 states. [2022-11-18 20:57:25,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3814 to 3796. [2022-11-18 20:57:25,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3626 states have (on average 3.1577495863210148) internal successors, (11450), 3795 states have internal predecessors, (11450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:25,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 11450 transitions. [2022-11-18 20:57:25,866 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 11450 transitions. Word has length 8 [2022-11-18 20:57:25,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:57:25,866 INFO L495 AbstractCegarLoop]: Abstraction has 3796 states and 11450 transitions. [2022-11-18 20:57:25,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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) [2022-11-18 20:57:25,867 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 11450 transitions. [2022-11-18 20:57:25,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 20:57:25,868 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:25,868 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:57:25,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-18 20:57:25,869 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err7ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-11-18 20:57:25,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:25,870 INFO L85 PathProgramCache]: Analyzing trace with hash 671110429, now seen corresponding path program 1 times [2022-11-18 20:57:25,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:57:25,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379109130] [2022-11-18 20:57:25,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:25,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:57:25,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:25,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:57:25,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:57:25,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379109130] [2022-11-18 20:57:25,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379109130] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:57:25,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:57:25,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:57:25,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750131226] [2022-11-18 20:57:25,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:57:25,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:57:25,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:57:25,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:57:25,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:57:25,902 INFO L87 Difference]: Start difference. First operand 3796 states and 11450 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:26,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:57:26,061 INFO L93 Difference]: Finished difference Result 1104 states and 3164 transitions. [2022-11-18 20:57:26,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:57:26,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-18 20:57:26,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:57:26,068 INFO L225 Difference]: With dead ends: 1104 [2022-11-18 20:57:26,068 INFO L226 Difference]: Without dead ends: 1104 [2022-11-18 20:57:26,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:57:26,069 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 15 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:57:26,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 14 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:57:26,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2022-11-18 20:57:26,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 1028. [2022-11-18 20:57:26,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 996 states have (on average 2.9698795180722892) internal successors, (2958), 1027 states have internal predecessors, (2958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:26,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 2958 transitions. [2022-11-18 20:57:26,106 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 2958 transitions. Word has length 9 [2022-11-18 20:57:26,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:57:26,107 INFO L495 AbstractCegarLoop]: Abstraction has 1028 states and 2958 transitions. [2022-11-18 20:57:26,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:26,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 2958 transitions. [2022-11-18 20:57:26,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 20:57:26,109 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:26,109 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:57:26,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-18 20:57:26,110 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err4ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-11-18 20:57:26,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:26,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1740513472, now seen corresponding path program 1 times [2022-11-18 20:57:26,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:57:26,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065518126] [2022-11-18 20:57:26,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:26,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:57:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:26,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:57:26,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:57:26,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065518126] [2022-11-18 20:57:26,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065518126] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:57:26,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:57:26,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:57:26,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087516659] [2022-11-18 20:57:26,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:57:26,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:57:26,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:57:26,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:57:26,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:57:26,260 INFO L87 Difference]: Start difference. First operand 1028 states and 2958 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:26,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:57:26,569 INFO L93 Difference]: Finished difference Result 1080 states and 3111 transitions. [2022-11-18 20:57:26,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:57:26,570 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 20:57:26,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:57:26,576 INFO L225 Difference]: With dead ends: 1080 [2022-11-18 20:57:26,576 INFO L226 Difference]: Without dead ends: 1080 [2022-11-18 20:57:26,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:57:26,577 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 100 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:57:26,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 38 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:57:26,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2022-11-18 20:57:26,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 938. [2022-11-18 20:57:26,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 906 states have (on average 2.967991169977925) internal successors, (2689), 937 states have internal predecessors, (2689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:26,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 2689 transitions. [2022-11-18 20:57:26,614 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 2689 transitions. Word has length 11 [2022-11-18 20:57:26,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:57:26,615 INFO L495 AbstractCegarLoop]: Abstraction has 938 states and 2689 transitions. [2022-11-18 20:57:26,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:26,615 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 2689 transitions. [2022-11-18 20:57:26,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 20:57:26,616 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:26,616 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-18 20:57:26,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-18 20:57:26,617 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-11-18 20:57:26,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:26,618 INFO L85 PathProgramCache]: Analyzing trace with hash 2048590810, now seen corresponding path program 1 times [2022-11-18 20:57:26,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:57:26,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117209770] [2022-11-18 20:57:26,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:26,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:57:26,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:57:26,631 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:57:26,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:57:26,645 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:57:26,645 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 20:57:26,646 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (60 of 61 remaining) [2022-11-18 20:57:26,646 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 61 remaining) [2022-11-18 20:57:26,646 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 61 remaining) [2022-11-18 20:57:26,647 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 61 remaining) [2022-11-18 20:57:26,647 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 61 remaining) [2022-11-18 20:57:26,647 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (55 of 61 remaining) [2022-11-18 20:57:26,647 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 61 remaining) [2022-11-18 20:57:26,648 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 61 remaining) [2022-11-18 20:57:26,648 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18ASSERT_VIOLATIONMEMORY_LEAK (52 of 61 remaining) [2022-11-18 20:57:26,648 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONMEMORY_LEAK (51 of 61 remaining) [2022-11-18 20:57:26,649 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 61 remaining) [2022-11-18 20:57:26,649 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 61 remaining) [2022-11-18 20:57:26,649 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 61 remaining) [2022-11-18 20:57:26,649 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 61 remaining) [2022-11-18 20:57:26,650 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 61 remaining) [2022-11-18 20:57:26,650 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 61 remaining) [2022-11-18 20:57:26,650 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 61 remaining) [2022-11-18 20:57:26,650 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 61 remaining) [2022-11-18 20:57:26,651 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 61 remaining) [2022-11-18 20:57:26,651 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 61 remaining) [2022-11-18 20:57:26,651 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (40 of 61 remaining) [2022-11-18 20:57:26,651 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 61 remaining) [2022-11-18 20:57:26,652 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 61 remaining) [2022-11-18 20:57:26,652 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 61 remaining) [2022-11-18 20:57:26,652 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 61 remaining) [2022-11-18 20:57:26,652 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 61 remaining) [2022-11-18 20:57:26,653 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 61 remaining) [2022-11-18 20:57:26,653 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (33 of 61 remaining) [2022-11-18 20:57:26,653 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 61 remaining) [2022-11-18 20:57:26,653 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 61 remaining) [2022-11-18 20:57:26,654 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18ASSERT_VIOLATIONMEMORY_LEAK (30 of 61 remaining) [2022-11-18 20:57:26,654 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONMEMORY_LEAK (29 of 61 remaining) [2022-11-18 20:57:26,654 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 61 remaining) [2022-11-18 20:57:26,655 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 61 remaining) [2022-11-18 20:57:26,655 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 61 remaining) [2022-11-18 20:57:26,655 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 61 remaining) [2022-11-18 20:57:26,655 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 61 remaining) [2022-11-18 20:57:26,656 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 61 remaining) [2022-11-18 20:57:26,656 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 61 remaining) [2022-11-18 20:57:26,656 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 61 remaining) [2022-11-18 20:57:26,656 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 61 remaining) [2022-11-18 20:57:26,657 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 61 remaining) [2022-11-18 20:57:26,657 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 61 remaining) [2022-11-18 20:57:26,657 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 61 remaining) [2022-11-18 20:57:26,657 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 61 remaining) [2022-11-18 20:57:26,658 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 61 remaining) [2022-11-18 20:57:26,658 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (14 of 61 remaining) [2022-11-18 20:57:26,658 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 61 remaining) [2022-11-18 20:57:26,658 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 61 remaining) [2022-11-18 20:57:26,659 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18ASSERT_VIOLATIONMEMORY_LEAK (11 of 61 remaining) [2022-11-18 20:57:26,659 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONMEMORY_LEAK (10 of 61 remaining) [2022-11-18 20:57:26,659 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 61 remaining) [2022-11-18 20:57:26,659 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 61 remaining) [2022-11-18 20:57:26,660 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 61 remaining) [2022-11-18 20:57:26,660 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 61 remaining) [2022-11-18 20:57:26,660 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 61 remaining) [2022-11-18 20:57:26,660 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 61 remaining) [2022-11-18 20:57:26,661 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 61 remaining) [2022-11-18 20:57:26,661 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 61 remaining) [2022-11-18 20:57:26,661 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 61 remaining) [2022-11-18 20:57:26,662 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 61 remaining) [2022-11-18 20:57:26,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-18 20:57:26,662 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:57:26,663 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 20:57:26,663 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-18 20:57:26,752 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 20:57:26,756 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-18 20:57:26,756 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 347 places, 377 transitions, 775 flow [2022-11-18 20:57:26,757 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 347 places, 377 transitions, 775 flow [2022-11-18 20:57:26,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 347 places, 377 transitions, 775 flow [2022-11-18 20:57:26,891 INFO L130 PetriNetUnfolder]: 40/429 cut-off events. [2022-11-18 20:57:26,891 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-18 20:57:26,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 445 conditions, 429 events. 40/429 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1740 event pairs, 0 based on Foata normal form. 0/316 useless extension candidates. Maximal degree in co-relation 354. Up to 8 conditions per place. [2022-11-18 20:57:27,010 INFO L119 LiptonReduction]: Number of co-enabled transitions 88704 [2022-11-18 20:57:51,356 INFO L134 LiptonReduction]: Checked pairs total: 139048 [2022-11-18 20:57:51,357 INFO L136 LiptonReduction]: Total number of compositions: 418 [2022-11-18 20:57:51,358 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 117 places, 128 transitions, 277 flow [2022-11-18 20:58:05,438 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 352583 states, 310903 states have (on average 4.883700060790664) internal successors, (1518357), 352582 states have internal predecessors, (1518357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:05,443 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:58:05,444 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;@6aacb752, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:58:05,444 INFO L358 AbstractCegarLoop]: Starting to check reachability of 80 error locations. [2022-11-18 20:58:06,105 INFO L276 IsEmpty]: Start isEmpty. Operand has 352583 states, 310903 states have (on average 4.883700060790664) internal successors, (1518357), 352582 states have internal predecessors, (1518357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:06,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-18 20:58:06,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:06,105 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-18 20:58:06,105 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-11-18 20:58:06,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:06,107 INFO L85 PathProgramCache]: Analyzing trace with hash 75198, now seen corresponding path program 1 times [2022-11-18 20:58:06,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:58:06,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538982454] [2022-11-18 20:58:06,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:06,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:58:06,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:06,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:58:06,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:58:06,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538982454] [2022-11-18 20:58:06,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538982454] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:58:06,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:58:06,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 20:58:06,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522602896] [2022-11-18 20:58:06,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:58:06,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:58:06,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:58:06,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:58:06,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:58:06,606 INFO L87 Difference]: Start difference. First operand has 352583 states, 310903 states have (on average 4.883700060790664) internal successors, (1518357), 352582 states have internal predecessors, (1518357), 0 states have call successors, (0), 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) [2022-11-18 20:58:12,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:12,592 INFO L93 Difference]: Finished difference Result 245858 states and 984832 transitions. [2022-11-18 20:58:12,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:58:12,593 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 [2022-11-18 20:58:12,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:15,974 INFO L225 Difference]: With dead ends: 245858 [2022-11-18 20:58:15,974 INFO L226 Difference]: Without dead ends: 245858 [2022-11-18 20:58:15,975 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 [2022-11-18 20:58:15,976 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 106 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:58:15,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 18 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 20:58:16,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245858 states. [2022-11-18 20:58:25,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245858 to 223137. [2022-11-18 20:58:26,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223137 states, 209324 states have (on average 4.354603389960062) internal successors, (911523), 223136 states have internal predecessors, (911523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:29,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223137 states to 223137 states and 911523 transitions. [2022-11-18 20:58:29,036 INFO L78 Accepts]: Start accepts. Automaton has 223137 states and 911523 transitions. Word has length 2 [2022-11-18 20:58:29,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:29,037 INFO L495 AbstractCegarLoop]: Abstraction has 223137 states and 911523 transitions. [2022-11-18 20:58:29,037 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) [2022-11-18 20:58:29,037 INFO L276 IsEmpty]: Start isEmpty. Operand 223137 states and 911523 transitions. [2022-11-18 20:58:29,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-18 20:58:29,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:29,038 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-18 20:58:29,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-18 20:58:29,039 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 77 more)] === [2022-11-18 20:58:29,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:29,039 INFO L85 PathProgramCache]: Analyzing trace with hash 75199, now seen corresponding path program 1 times [2022-11-18 20:58:29,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:58:29,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849455187] [2022-11-18 20:58:29,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:29,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:58:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:30,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:58:30,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:58:30,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849455187] [2022-11-18 20:58:30,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849455187] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:58:30,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:58:30,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 20:58:30,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578330513] [2022-11-18 20:58:30,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:58:30,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:58:30,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:58:30,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:58:30,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:58:30,101 INFO L87 Difference]: Start difference. First operand 223137 states and 911523 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) [2022-11-18 20:58:32,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:32,878 INFO L93 Difference]: Finished difference Result 190368 states and 765961 transitions. [2022-11-18 20:58:32,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:58:32,879 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 [2022-11-18 20:58:32,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:34,421 INFO L225 Difference]: With dead ends: 190368 [2022-11-18 20:58:34,422 INFO L226 Difference]: Without dead ends: 190368 [2022-11-18 20:58:34,422 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 [2022-11-18 20:58:34,423 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 109 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:58:34,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 9 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:58:36,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190368 states.