./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/stack-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/stack-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R --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 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 17:36:37,189 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:36:37,191 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:36:37,217 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:36:37,218 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:36:37,222 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:36:37,224 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:36:37,229 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:36:37,231 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:36:37,233 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:36:37,234 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:36:37,238 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:36:37,238 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:36:37,244 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:36:37,246 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:36:37,248 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:36:37,250 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:36:37,252 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:36:37,254 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:36:37,257 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:36:37,260 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:36:37,262 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:36:37,264 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:36:37,264 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:36:37,270 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:36:37,275 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:36:37,275 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:36:37,276 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:36:37,278 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:36:37,280 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:36:37,282 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:36:37,283 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:36:37,284 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:36:37,286 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:36:37,287 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:36:37,288 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:36:37,288 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:36:37,289 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:36:37,289 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:36:37,291 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:36:37,291 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:36:37,292 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 17:36:37,314 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:36:37,314 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:36:37,315 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:36:37,315 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:36:37,316 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:36:37,316 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:36:37,317 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:36:37,317 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:36:37,317 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:36:37,318 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:36:37,319 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:36:37,319 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:36:37,319 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:36:37,319 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:36:37,320 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:36:37,320 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:36:37,320 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:36:37,320 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:36:37,320 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:36:37,321 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:36:37,321 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:36:37,321 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:36:37,321 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:36:37,322 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:36:37,322 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:36:37,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:36:37,322 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:36:37,322 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:36:37,323 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:36:37,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:36:37,324 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:36:37,324 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:36:37,324 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:36:37,325 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 [2022-11-25 17:36:37,637 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:36:37,671 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:36:37,674 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:36:37,675 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:36:37,675 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:36:37,676 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/pthread/stack-2.i [2022-11-25 17:36:40,766 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:36:41,011 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:36:41,024 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/sv-benchmarks/c/pthread/stack-2.i [2022-11-25 17:36:41,042 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/data/007b1222f/b2b31013359a40f5ba8ec5d6ed3b3b8f/FLAG772829749 [2022-11-25 17:36:41,065 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/data/007b1222f/b2b31013359a40f5ba8ec5d6ed3b3b8f [2022-11-25 17:36:41,070 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:36:41,072 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:36:41,076 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:36:41,077 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:36:41,082 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:36:41,083 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:36:41" (1/1) ... [2022-11-25 17:36:41,084 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59452816 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:36:41, skipping insertion in model container [2022-11-25 17:36:41,084 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:36:41" (1/1) ... [2022-11-25 17:36:41,092 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:36:41,157 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:36:41,795 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/sv-benchmarks/c/pthread/stack-2.i[41520,41533] [2022-11-25 17:36:41,844 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:36:41,858 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:36:41,919 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/sv-benchmarks/c/pthread/stack-2.i[41520,41533] [2022-11-25 17:36:41,934 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:36:42,018 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:36:42,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:36:42 WrapperNode [2022-11-25 17:36:42,019 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:36:42,021 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:36:42,021 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:36:42,021 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:36:42,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:36:42" (1/1) ... [2022-11-25 17:36:42,058 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:36:42" (1/1) ... [2022-11-25 17:36:42,109 INFO L138 Inliner]: procedures = 277, calls = 44, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 159 [2022-11-25 17:36:42,110 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:36:42,111 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:36:42,111 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:36:42,111 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:36:42,121 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:36:42" (1/1) ... [2022-11-25 17:36:42,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:36:42" (1/1) ... [2022-11-25 17:36:42,137 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:36:42" (1/1) ... [2022-11-25 17:36:42,139 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:36:42" (1/1) ... [2022-11-25 17:36:42,146 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:36:42" (1/1) ... [2022-11-25 17:36:42,161 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:36:42" (1/1) ... [2022-11-25 17:36:42,163 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:36:42" (1/1) ... [2022-11-25 17:36:42,173 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:36:42" (1/1) ... [2022-11-25 17:36:42,176 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:36:42,177 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:36:42,177 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:36:42,177 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:36:42,178 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:36:42" (1/1) ... [2022-11-25 17:36:42,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:36:42,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:36:42,223 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:36:42,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:36:42,267 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-25 17:36:42,267 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-25 17:36:42,268 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-25 17:36:42,268 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-25 17:36:42,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:36:42,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:36:42,269 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:36:42,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:36:42,270 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-25 17:36:42,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:36:42,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:36:42,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:36:42,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:36:42,272 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:36:42,465 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:36:42,482 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:36:42,830 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:36:42,839 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:36:42,839 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 17:36:42,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:36:42 BoogieIcfgContainer [2022-11-25 17:36:42,842 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:36:42,845 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:36:42,845 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:36:42,849 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:36:42,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:36:41" (1/3) ... [2022-11-25 17:36:42,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@111d4f5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:36:42, skipping insertion in model container [2022-11-25 17:36:42,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:36:42" (2/3) ... [2022-11-25 17:36:42,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@111d4f5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:36:42, skipping insertion in model container [2022-11-25 17:36:42,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:36:42" (3/3) ... [2022-11-25 17:36:42,852 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-2.i [2022-11-25 17:36:42,872 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:36:42,872 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-11-25 17:36:42,873 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:36:43,032 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 17:36:43,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 196 places, 199 transitions, 414 flow [2022-11-25 17:36:43,188 INFO L130 PetriNetUnfolder]: 10/197 cut-off events. [2022-11-25 17:36:43,189 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:36:43,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 197 events. 10/197 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 504 event pairs, 0 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 143. Up to 3 conditions per place. [2022-11-25 17:36:43,206 INFO L82 GeneralOperation]: Start removeDead. Operand has 196 places, 199 transitions, 414 flow [2022-11-25 17:36:43,223 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 192 transitions, 396 flow [2022-11-25 17:36:43,229 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:36:43,261 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 192 transitions, 396 flow [2022-11-25 17:36:43,269 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 192 transitions, 396 flow [2022-11-25 17:36:43,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 192 transitions, 396 flow [2022-11-25 17:36:43,375 INFO L130 PetriNetUnfolder]: 10/192 cut-off events. [2022-11-25 17:36:43,375 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:36:43,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 192 events. 10/192 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 479 event pairs, 0 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 143. Up to 3 conditions per place. [2022-11-25 17:36:43,383 INFO L119 LiptonReduction]: Number of co-enabled transitions 11140 [2022-11-25 17:36:49,899 INFO L134 LiptonReduction]: Checked pairs total: 14784 [2022-11-25 17:36:49,899 INFO L136 LiptonReduction]: Total number of compositions: 200 [2022-11-25 17:36:49,928 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:36:49,938 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=PETRI_NET, 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;@6da0cadb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:36:49,939 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2022-11-25 17:36:49,945 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-11-25 17:36:49,946 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:36:49,946 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:36:49,947 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-25 17:36:49,949 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:36:49,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:36:49,956 INFO L85 PathProgramCache]: Analyzing trace with hash 809, now seen corresponding path program 1 times [2022-11-25 17:36:49,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:36:49,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467927973] [2022-11-25 17:36:49,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:36:49,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:36:50,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:36:50,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:36:50,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:36:50,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467927973] [2022-11-25 17:36:50,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467927973] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:36:50,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:36:50,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-25 17:36:50,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084959158] [2022-11-25 17:36:50,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:36:50,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 17:36:50,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:36:50,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 17:36:50,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:36:50,153 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 399 [2022-11-25 17:36:50,159 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 104 flow. Second operand has 2 states, 2 states have (on average 188.5) internal successors, (377), 2 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:50,160 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:36:50,160 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 399 [2022-11-25 17:36:50,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:36:50,511 INFO L130 PetriNetUnfolder]: 1456/2239 cut-off events. [2022-11-25 17:36:50,511 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-25 17:36:50,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4524 conditions, 2239 events. 1456/2239 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 10304 event pairs, 1176 based on Foata normal form. 0/1233 useless extension candidates. Maximal degree in co-relation 4272. Up to 2240 conditions per place. [2022-11-25 17:36:50,531 INFO L137 encePairwiseOnDemand]: 397/399 looper letters, 44 selfloop transitions, 0 changer transitions 0/44 dead transitions. [2022-11-25 17:36:50,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 44 transitions, 188 flow [2022-11-25 17:36:50,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 17:36:50,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 17:36:50,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 422 transitions. [2022-11-25 17:36:50,578 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5288220551378446 [2022-11-25 17:36:50,579 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 422 transitions. [2022-11-25 17:36:50,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 422 transitions. [2022-11-25 17:36:50,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:36:50,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 422 transitions. [2022-11-25 17:36:50,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 211.0) internal successors, (422), 2 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:50,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 399.0) internal successors, (1197), 3 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:50,599 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 399.0) internal successors, (1197), 3 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:50,601 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 104 flow. Second operand 2 states and 422 transitions. [2022-11-25 17:36:50,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 44 transitions, 188 flow [2022-11-25 17:36:50,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 180 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 17:36:50,609 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 92 flow [2022-11-25 17:36:50,611 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=92, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2022-11-25 17:36:50,617 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2022-11-25 17:36:50,617 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 92 flow [2022-11-25 17:36:50,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 188.5) internal successors, (377), 2 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:50,618 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:36:50,618 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:36:50,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:36:50,619 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:36:50,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:36:50,620 INFO L85 PathProgramCache]: Analyzing trace with hash 795084, now seen corresponding path program 1 times [2022-11-25 17:36:50,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:36:50,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576644853] [2022-11-25 17:36:50,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:36:50,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:36:50,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:36:50,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:36:50,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:36:50,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576644853] [2022-11-25 17:36:50,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576644853] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:36:50,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:36:50,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:36:50,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385912482] [2022-11-25 17:36:50,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:36:50,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:36:50,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:36:50,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:36:50,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:36:50,946 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 399 [2022-11-25 17:36:50,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:50,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:36:50,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 399 [2022-11-25 17:36:50,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:36:51,209 INFO L130 PetriNetUnfolder]: 1427/2184 cut-off events. [2022-11-25 17:36:51,210 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-25 17:36:51,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4385 conditions, 2184 events. 1427/2184 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 9989 event pairs, 1152 based on Foata normal form. 0/1215 useless extension candidates. Maximal degree in co-relation 4382. Up to 2183 conditions per place. [2022-11-25 17:36:51,223 INFO L137 encePairwiseOnDemand]: 395/399 looper letters, 40 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2022-11-25 17:36:51,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 42 transitions, 172 flow [2022-11-25 17:36:51,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:36:51,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:36:51,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 581 transitions. [2022-11-25 17:36:51,226 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4853801169590643 [2022-11-25 17:36:51,226 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 581 transitions. [2022-11-25 17:36:51,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 581 transitions. [2022-11-25 17:36:51,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:36:51,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 581 transitions. [2022-11-25 17:36:51,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:51,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:51,234 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:51,235 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 92 flow. Second operand 3 states and 581 transitions. [2022-11-25 17:36:51,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 42 transitions, 172 flow [2022-11-25 17:36:51,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 42 transitions, 172 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:36:51,237 INFO L231 Difference]: Finished difference. Result has 43 places, 42 transitions, 92 flow [2022-11-25 17:36:51,237 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=43, PETRI_TRANSITIONS=42} [2022-11-25 17:36:51,238 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2022-11-25 17:36:51,238 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 42 transitions, 92 flow [2022-11-25 17:36:51,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:51,239 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:36:51,239 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:36:51,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:36:51,240 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:36:51,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:36:51,241 INFO L85 PathProgramCache]: Analyzing trace with hash 795085, now seen corresponding path program 1 times [2022-11-25 17:36:51,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:36:51,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234006192] [2022-11-25 17:36:51,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:36:51,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:36:51,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:36:51,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:36:51,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:36:51,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234006192] [2022-11-25 17:36:51,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234006192] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:36:51,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:36:51,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:36:51,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910632740] [2022-11-25 17:36:51,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:36:51,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:36:51,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:36:51,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:36:51,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:36:51,438 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 399 [2022-11-25 17:36:51,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:51,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:36:51,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 399 [2022-11-25 17:36:51,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:36:51,682 INFO L130 PetriNetUnfolder]: 1398/2129 cut-off events. [2022-11-25 17:36:51,682 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-25 17:36:51,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4278 conditions, 2129 events. 1398/2129 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 9615 event pairs, 1128 based on Foata normal form. 0/1197 useless extension candidates. Maximal degree in co-relation 4274. Up to 2128 conditions per place. [2022-11-25 17:36:51,693 INFO L137 encePairwiseOnDemand]: 395/399 looper letters, 38 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2022-11-25 17:36:51,694 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 168 flow [2022-11-25 17:36:51,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:36:51,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:36:51,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 591 transitions. [2022-11-25 17:36:51,696 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49373433583959897 [2022-11-25 17:36:51,696 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 591 transitions. [2022-11-25 17:36:51,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 591 transitions. [2022-11-25 17:36:51,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:36:51,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 591 transitions. [2022-11-25 17:36:51,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:51,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:51,702 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:51,702 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 92 flow. Second operand 3 states and 591 transitions. [2022-11-25 17:36:51,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 168 flow [2022-11-25 17:36:51,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 164 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:36:51,704 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 88 flow [2022-11-25 17:36:51,704 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2022-11-25 17:36:51,705 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -7 predicate places. [2022-11-25 17:36:51,705 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 88 flow [2022-11-25 17:36:51,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:51,705 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:36:51,706 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:36:51,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 17:36:51,706 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:36:51,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:36:51,706 INFO L85 PathProgramCache]: Analyzing trace with hash 764093374, now seen corresponding path program 1 times [2022-11-25 17:36:51,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:36:51,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348132949] [2022-11-25 17:36:51,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:36:51,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:36:51,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:36:51,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:36:51,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:36:51,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348132949] [2022-11-25 17:36:51,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348132949] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:36:51,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:36:51,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:36:51,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680990747] [2022-11-25 17:36:51,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:36:51,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:36:51,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:36:51,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:36:51,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:36:51,877 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 399 [2022-11-25 17:36:51,878 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 176.25) internal successors, (705), 4 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:51,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:36:51,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 399 [2022-11-25 17:36:51,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:36:52,051 INFO L130 PetriNetUnfolder]: 1021/1583 cut-off events. [2022-11-25 17:36:52,052 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-25 17:36:52,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3186 conditions, 1583 events. 1021/1583 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 6893 event pairs, 816 based on Foata normal form. 0/963 useless extension candidates. Maximal degree in co-relation 3182. Up to 1582 conditions per place. [2022-11-25 17:36:52,060 INFO L137 encePairwiseOnDemand]: 396/399 looper letters, 37 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2022-11-25 17:36:52,061 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 164 flow [2022-11-25 17:36:52,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:36:52,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:36:52,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 565 transitions. [2022-11-25 17:36:52,067 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47201336675020883 [2022-11-25 17:36:52,067 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 565 transitions. [2022-11-25 17:36:52,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 565 transitions. [2022-11-25 17:36:52,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:36:52,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 565 transitions. [2022-11-25 17:36:52,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:52,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:52,074 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:52,074 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 88 flow. Second operand 3 states and 565 transitions. [2022-11-25 17:36:52,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 164 flow [2022-11-25 17:36:52,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 160 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:36:52,076 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 86 flow [2022-11-25 17:36:52,076 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2022-11-25 17:36:52,078 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -8 predicate places. [2022-11-25 17:36:52,078 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 86 flow [2022-11-25 17:36:52,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 176.25) internal successors, (705), 4 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:52,079 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:36:52,079 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:36:52,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 17:36:52,080 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:36:52,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:36:52,080 INFO L85 PathProgramCache]: Analyzing trace with hash 764093372, now seen corresponding path program 1 times [2022-11-25 17:36:52,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:36:52,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548708008] [2022-11-25 17:36:52,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:36:52,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:36:52,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:36:52,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:36:52,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:36:52,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548708008] [2022-11-25 17:36:52,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548708008] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:36:52,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:36:52,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:36:52,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175343104] [2022-11-25 17:36:52,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:36:52,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:36:52,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:36:52,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:36:52,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:36:52,340 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 399 [2022-11-25 17:36:52,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 182.25) internal successors, (729), 4 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:52,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:36:52,342 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 399 [2022-11-25 17:36:52,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:36:52,477 INFO L130 PetriNetUnfolder]: 644/1037 cut-off events. [2022-11-25 17:36:52,477 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-25 17:36:52,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2094 conditions, 1037 events. 644/1037 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4321 event pairs, 504 based on Foata normal form. 0/729 useless extension candidates. Maximal degree in co-relation 2090. Up to 1036 conditions per place. [2022-11-25 17:36:52,482 INFO L137 encePairwiseOnDemand]: 396/399 looper letters, 36 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2022-11-25 17:36:52,483 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 38 transitions, 160 flow [2022-11-25 17:36:52,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:36:52,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:36:52,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 582 transitions. [2022-11-25 17:36:52,485 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48621553884711777 [2022-11-25 17:36:52,485 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 582 transitions. [2022-11-25 17:36:52,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 582 transitions. [2022-11-25 17:36:52,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:36:52,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 582 transitions. [2022-11-25 17:36:52,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.0) internal successors, (582), 3 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:52,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:52,491 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:52,491 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 86 flow. Second operand 3 states and 582 transitions. [2022-11-25 17:36:52,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 38 transitions, 160 flow [2022-11-25 17:36:52,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 38 transitions, 156 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:36:52,492 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 84 flow [2022-11-25 17:36:52,493 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2022-11-25 17:36:52,493 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -9 predicate places. [2022-11-25 17:36:52,493 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 84 flow [2022-11-25 17:36:52,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 182.25) internal successors, (729), 4 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:52,494 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:36:52,494 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:36:52,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:36:52,495 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:36:52,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:36:52,495 INFO L85 PathProgramCache]: Analyzing trace with hash -2083606024, now seen corresponding path program 1 times [2022-11-25 17:36:52,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:36:52,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220223791] [2022-11-25 17:36:52,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:36:52,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:36:52,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:36:52,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:36:52,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:36:52,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220223791] [2022-11-25 17:36:52,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220223791] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:36:52,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:36:52,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:36:52,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287917638] [2022-11-25 17:36:52,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:36:52,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:36:52,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:36:52,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:36:52,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:36:52,550 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 399 [2022-11-25 17:36:52,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:52,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:36:52,551 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 399 [2022-11-25 17:36:52,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:36:52,793 INFO L130 PetriNetUnfolder]: 1075/1732 cut-off events. [2022-11-25 17:36:52,793 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-25 17:36:52,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3494 conditions, 1732 events. 1075/1732 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 7765 event pairs, 309 based on Foata normal form. 0/1236 useless extension candidates. Maximal degree in co-relation 3490. Up to 1047 conditions per place. [2022-11-25 17:36:52,801 INFO L137 encePairwiseOnDemand]: 394/399 looper letters, 65 selfloop transitions, 4 changer transitions 0/69 dead transitions. [2022-11-25 17:36:52,801 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 69 transitions, 289 flow [2022-11-25 17:36:52,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:36:52,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:36:52,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 622 transitions. [2022-11-25 17:36:52,804 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5196324143692564 [2022-11-25 17:36:52,804 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 622 transitions. [2022-11-25 17:36:52,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 622 transitions. [2022-11-25 17:36:52,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:36:52,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 622 transitions. [2022-11-25 17:36:52,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:52,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:52,809 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:52,809 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 84 flow. Second operand 3 states and 622 transitions. [2022-11-25 17:36:52,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 69 transitions, 289 flow [2022-11-25 17:36:52,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 69 transitions, 283 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:36:52,811 INFO L231 Difference]: Finished difference. Result has 41 places, 41 transitions, 110 flow [2022-11-25 17:36:52,812 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=41, PETRI_TRANSITIONS=41} [2022-11-25 17:36:52,812 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -7 predicate places. [2022-11-25 17:36:52,813 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 41 transitions, 110 flow [2022-11-25 17:36:52,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:52,813 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:36:52,813 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:36:52,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 17:36:52,814 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:36:52,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:36:52,814 INFO L85 PathProgramCache]: Analyzing trace with hash -2083607633, now seen corresponding path program 1 times [2022-11-25 17:36:52,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:36:52,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127845448] [2022-11-25 17:36:52,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:36:52,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:36:52,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:36:53,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:36:53,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:36:53,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127845448] [2022-11-25 17:36:53,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127845448] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:36:53,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:36:53,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:36:53,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419557224] [2022-11-25 17:36:53,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:36:53,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:36:53,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:36:53,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:36:53,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:36:53,342 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 399 [2022-11-25 17:36:53,343 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 41 transitions, 110 flow. Second operand has 5 states, 5 states have (on average 182.2) internal successors, (911), 5 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:53,343 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:36:53,343 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 399 [2022-11-25 17:36:53,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:36:53,794 INFO L130 PetriNetUnfolder]: 1342/2157 cut-off events. [2022-11-25 17:36:53,795 INFO L131 PetriNetUnfolder]: For 259/259 co-relation queries the response was YES. [2022-11-25 17:36:53,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4699 conditions, 2157 events. 1342/2157 cut-off events. For 259/259 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 9841 event pairs, 166 based on Foata normal form. 0/1657 useless extension candidates. Maximal degree in co-relation 4694. Up to 1677 conditions per place. [2022-11-25 17:36:53,806 INFO L137 encePairwiseOnDemand]: 393/399 looper letters, 89 selfloop transitions, 7 changer transitions 0/96 dead transitions. [2022-11-25 17:36:53,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 96 transitions, 439 flow [2022-11-25 17:36:53,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:36:53,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:36:53,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 999 transitions. [2022-11-25 17:36:53,809 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5007518796992482 [2022-11-25 17:36:53,810 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 999 transitions. [2022-11-25 17:36:53,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 999 transitions. [2022-11-25 17:36:53,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:36:53,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 999 transitions. [2022-11-25 17:36:53,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 199.8) internal successors, (999), 5 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:53,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 399.0) internal successors, (2394), 6 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:53,817 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 399.0) internal successors, (2394), 6 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:53,817 INFO L175 Difference]: Start difference. First operand has 41 places, 41 transitions, 110 flow. Second operand 5 states and 999 transitions. [2022-11-25 17:36:53,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 96 transitions, 439 flow [2022-11-25 17:36:53,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 96 transitions, 423 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:36:53,823 INFO L231 Difference]: Finished difference. Result has 46 places, 47 transitions, 155 flow [2022-11-25 17:36:53,823 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=155, PETRI_PLACES=46, PETRI_TRANSITIONS=47} [2022-11-25 17:36:53,824 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -2 predicate places. [2022-11-25 17:36:53,824 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 47 transitions, 155 flow [2022-11-25 17:36:53,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 182.2) internal successors, (911), 5 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:53,824 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:36:53,825 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:36:53,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 17:36:53,825 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:36:53,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:36:53,826 INFO L85 PathProgramCache]: Analyzing trace with hash -2083607632, now seen corresponding path program 1 times [2022-11-25 17:36:53,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:36:53,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329097539] [2022-11-25 17:36:53,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:36:53,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:36:53,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:36:53,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:36:53,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:36:53,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329097539] [2022-11-25 17:36:53,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329097539] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:36:53,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:36:53,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:36:53,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942438769] [2022-11-25 17:36:53,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:36:53,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:36:53,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:36:53,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:36:53,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:36:54,098 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 399 [2022-11-25 17:36:54,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 47 transitions, 155 flow. Second operand has 5 states, 5 states have (on average 181.2) internal successors, (906), 5 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:54,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:36:54,099 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 399 [2022-11-25 17:36:54,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:36:54,485 INFO L130 PetriNetUnfolder]: 1514/2427 cut-off events. [2022-11-25 17:36:54,485 INFO L131 PetriNetUnfolder]: For 453/453 co-relation queries the response was YES. [2022-11-25 17:36:54,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5590 conditions, 2427 events. 1514/2427 cut-off events. For 453/453 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11655 event pairs, 512 based on Foata normal form. 0/2057 useless extension candidates. Maximal degree in co-relation 5582. Up to 1705 conditions per place. [2022-11-25 17:36:54,504 INFO L137 encePairwiseOnDemand]: 393/399 looper letters, 86 selfloop transitions, 8 changer transitions 0/94 dead transitions. [2022-11-25 17:36:54,504 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 94 transitions, 467 flow [2022-11-25 17:36:54,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:36:54,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:36:54,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 982 transitions. [2022-11-25 17:36:54,508 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49223057644110274 [2022-11-25 17:36:54,508 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 982 transitions. [2022-11-25 17:36:54,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 982 transitions. [2022-11-25 17:36:54,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:36:54,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 982 transitions. [2022-11-25 17:36:54,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 196.4) internal successors, (982), 5 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:54,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 399.0) internal successors, (2394), 6 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:54,515 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 399.0) internal successors, (2394), 6 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:54,515 INFO L175 Difference]: Start difference. First operand has 46 places, 47 transitions, 155 flow. Second operand 5 states and 982 transitions. [2022-11-25 17:36:54,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 94 transitions, 467 flow [2022-11-25 17:36:54,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 94 transitions, 467 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:36:54,519 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 198 flow [2022-11-25 17:36:54,519 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2022-11-25 17:36:54,520 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 3 predicate places. [2022-11-25 17:36:54,520 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 198 flow [2022-11-25 17:36:54,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 181.2) internal successors, (906), 5 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:54,521 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:36:54,521 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:36:54,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 17:36:54,522 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:36:54,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:36:54,522 INFO L85 PathProgramCache]: Analyzing trace with hash -220927739, now seen corresponding path program 1 times [2022-11-25 17:36:54,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:36:54,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793386566] [2022-11-25 17:36:54,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:36:54,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:36:54,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:36:54,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:36:54,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:36:54,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793386566] [2022-11-25 17:36:54,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793386566] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:36:54,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:36:54,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:36:54,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974788572] [2022-11-25 17:36:54,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:36:54,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:36:54,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:36:54,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:36:54,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:36:54,583 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 399 [2022-11-25 17:36:54,584 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:54,584 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:36:54,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 399 [2022-11-25 17:36:54,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:36:54,819 INFO L130 PetriNetUnfolder]: 1062/1725 cut-off events. [2022-11-25 17:36:54,819 INFO L131 PetriNetUnfolder]: For 599/599 co-relation queries the response was YES. [2022-11-25 17:36:54,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4078 conditions, 1725 events. 1062/1725 cut-off events. For 599/599 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7436 event pairs, 479 based on Foata normal form. 44/1477 useless extension candidates. Maximal degree in co-relation 4067. Up to 1424 conditions per place. [2022-11-25 17:36:54,829 INFO L137 encePairwiseOnDemand]: 395/399 looper letters, 59 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2022-11-25 17:36:54,829 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 61 transitions, 314 flow [2022-11-25 17:36:54,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:36:54,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:36:54,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 615 transitions. [2022-11-25 17:36:54,832 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5137844611528822 [2022-11-25 17:36:54,832 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 615 transitions. [2022-11-25 17:36:54,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 615 transitions. [2022-11-25 17:36:54,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:36:54,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 615 transitions. [2022-11-25 17:36:54,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:54,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:54,837 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:54,837 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 198 flow. Second operand 3 states and 615 transitions. [2022-11-25 17:36:54,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 61 transitions, 314 flow [2022-11-25 17:36:54,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 61 transitions, 294 flow, removed 3 selfloop flow, removed 6 redundant places. [2022-11-25 17:36:54,841 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 151 flow [2022-11-25 17:36:54,841 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2022-11-25 17:36:54,842 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 0 predicate places. [2022-11-25 17:36:54,842 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 151 flow [2022-11-25 17:36:54,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:54,843 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:36:54,843 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:36:54,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 17:36:54,843 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:36:54,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:36:54,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1604366034, now seen corresponding path program 1 times [2022-11-25 17:36:54,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:36:54,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637870959] [2022-11-25 17:36:54,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:36:54,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:36:54,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:36:54,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:36:54,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:36:54,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637870959] [2022-11-25 17:36:54,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637870959] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:36:54,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:36:54,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:36:54,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038901489] [2022-11-25 17:36:54,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:36:54,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:36:54,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:36:54,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:36:54,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:36:54,897 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 399 [2022-11-25 17:36:54,898 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:54,898 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:36:54,898 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 399 [2022-11-25 17:36:54,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:36:55,157 INFO L130 PetriNetUnfolder]: 1118/1813 cut-off events. [2022-11-25 17:36:55,158 INFO L131 PetriNetUnfolder]: For 454/454 co-relation queries the response was YES. [2022-11-25 17:36:55,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4312 conditions, 1813 events. 1118/1813 cut-off events. For 454/454 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7953 event pairs, 802 based on Foata normal form. 56/1621 useless extension candidates. Maximal degree in co-relation 4303. Up to 1668 conditions per place. [2022-11-25 17:36:55,166 INFO L137 encePairwiseOnDemand]: 396/399 looper letters, 61 selfloop transitions, 5 changer transitions 0/66 dead transitions. [2022-11-25 17:36:55,166 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 66 transitions, 342 flow [2022-11-25 17:36:55,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:36:55,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:36:55,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 609 transitions. [2022-11-25 17:36:55,169 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5087719298245614 [2022-11-25 17:36:55,169 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 609 transitions. [2022-11-25 17:36:55,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 609 transitions. [2022-11-25 17:36:55,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:36:55,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 609 transitions. [2022-11-25 17:36:55,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:55,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:55,174 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:55,174 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 151 flow. Second operand 3 states and 609 transitions. [2022-11-25 17:36:55,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 66 transitions, 342 flow [2022-11-25 17:36:55,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 66 transitions, 340 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:36:55,177 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 172 flow [2022-11-25 17:36:55,177 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2022-11-25 17:36:55,178 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 2 predicate places. [2022-11-25 17:36:55,178 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 172 flow [2022-11-25 17:36:55,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:55,179 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:36:55,179 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:36:55,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 17:36:55,179 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:36:55,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:36:55,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1438732333, now seen corresponding path program 1 times [2022-11-25 17:36:55,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:36:55,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354500062] [2022-11-25 17:36:55,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:36:55,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:36:55,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:36:55,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:36:55,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:36:55,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354500062] [2022-11-25 17:36:55,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354500062] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:36:55,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:36:55,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:36:55,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289136873] [2022-11-25 17:36:55,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:36:55,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:36:55,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:36:55,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:36:55,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:36:55,227 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 399 [2022-11-25 17:36:55,228 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:55,228 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:36:55,228 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 399 [2022-11-25 17:36:55,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:36:55,524 INFO L130 PetriNetUnfolder]: 1164/1879 cut-off events. [2022-11-25 17:36:55,524 INFO L131 PetriNetUnfolder]: For 639/639 co-relation queries the response was YES. [2022-11-25 17:36:55,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4705 conditions, 1879 events. 1164/1879 cut-off events. For 639/639 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8847 event pairs, 496 based on Foata normal form. 12/1635 useless extension candidates. Maximal degree in co-relation 4695. Up to 1592 conditions per place. [2022-11-25 17:36:55,533 INFO L137 encePairwiseOnDemand]: 396/399 looper letters, 67 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2022-11-25 17:36:55,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 69 transitions, 370 flow [2022-11-25 17:36:55,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:36:55,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:36:55,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 616 transitions. [2022-11-25 17:36:55,535 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5146198830409356 [2022-11-25 17:36:55,536 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 616 transitions. [2022-11-25 17:36:55,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 616 transitions. [2022-11-25 17:36:55,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:36:55,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 616 transitions. [2022-11-25 17:36:55,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.33333333333334) internal successors, (616), 3 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:55,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:55,541 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:55,541 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 172 flow. Second operand 3 states and 616 transitions. [2022-11-25 17:36:55,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 69 transitions, 370 flow [2022-11-25 17:36:55,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 69 transitions, 363 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:36:55,546 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 174 flow [2022-11-25 17:36:55,546 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2022-11-25 17:36:55,547 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 3 predicate places. [2022-11-25 17:36:55,547 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 174 flow [2022-11-25 17:36:55,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:55,548 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:36:55,548 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:36:55,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 17:36:55,548 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:36:55,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:36:55,549 INFO L85 PathProgramCache]: Analyzing trace with hash 847426793, now seen corresponding path program 1 times [2022-11-25 17:36:55,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:36:55,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470796952] [2022-11-25 17:36:55,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:36:55,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:36:55,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:36:55,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:36:55,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:36:55,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470796952] [2022-11-25 17:36:55,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470796952] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:36:55,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487637708] [2022-11-25 17:36:55,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:36:55,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:36:55,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:36:55,943 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:36:55,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:36:56,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:36:56,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-25 17:36:56,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:36:56,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:36:56,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:36:56,162 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:36:56,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2022-11-25 17:36:56,190 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-11-25 17:36:56,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2022-11-25 17:36:56,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:36:56,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:36:56,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:36:56,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487637708] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:36:56,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:36:56,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 19 [2022-11-25 17:36:56,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800256228] [2022-11-25 17:36:56,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:36:56,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 17:36:56,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:36:56,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 17:36:56,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-11-25 17:36:59,210 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 399 [2022-11-25 17:36:59,214 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 174 flow. Second operand has 21 states, 21 states have (on average 176.0) internal successors, (3696), 21 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:36:59,214 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:36:59,214 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 399 [2022-11-25 17:36:59,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:37:01,330 INFO L130 PetriNetUnfolder]: 2718/4375 cut-off events. [2022-11-25 17:37:01,330 INFO L131 PetriNetUnfolder]: For 1770/1770 co-relation queries the response was YES. [2022-11-25 17:37:01,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11196 conditions, 4375 events. 2718/4375 cut-off events. For 1770/1770 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 22194 event pairs, 447 based on Foata normal form. 94/3879 useless extension candidates. Maximal degree in co-relation 11185. Up to 1769 conditions per place. [2022-11-25 17:37:01,357 INFO L137 encePairwiseOnDemand]: 390/399 looper letters, 211 selfloop transitions, 26 changer transitions 0/237 dead transitions. [2022-11-25 17:37:01,358 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 237 transitions, 1188 flow [2022-11-25 17:37:01,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 17:37:01,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 17:37:01,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2664 transitions. [2022-11-25 17:37:01,366 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47690655209452204 [2022-11-25 17:37:01,366 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2664 transitions. [2022-11-25 17:37:01,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2664 transitions. [2022-11-25 17:37:01,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:37:01,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2664 transitions. [2022-11-25 17:37:01,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 190.28571428571428) internal successors, (2664), 14 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:01,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 399.0) internal successors, (5985), 15 states have internal predecessors, (5985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:01,385 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 399.0) internal successors, (5985), 15 states have internal predecessors, (5985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:01,386 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 174 flow. Second operand 14 states and 2664 transitions. [2022-11-25 17:37:01,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 237 transitions, 1188 flow [2022-11-25 17:37:01,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 237 transitions, 1185 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:37:01,395 INFO L231 Difference]: Finished difference. Result has 71 places, 70 transitions, 403 flow [2022-11-25 17:37:01,396 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=403, PETRI_PLACES=71, PETRI_TRANSITIONS=70} [2022-11-25 17:37:01,397 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 23 predicate places. [2022-11-25 17:37:01,398 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 70 transitions, 403 flow [2022-11-25 17:37:01,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 176.0) internal successors, (3696), 21 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:01,415 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:01,415 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:37:01,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:37:01,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 17:37:01,624 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:37:01,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:01,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1553216822, now seen corresponding path program 1 times [2022-11-25 17:37:01,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:37:01,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175737289] [2022-11-25 17:37:01,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:01,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:37:01,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:01,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:01,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:37:01,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175737289] [2022-11-25 17:37:01,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175737289] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:37:01,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:37:01,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:37:01,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262187429] [2022-11-25 17:37:01,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:37:01,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:37:01,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:37:01,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:37:01,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:37:01,739 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 399 [2022-11-25 17:37:01,741 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 403 flow. Second operand has 3 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:01,741 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:37:01,741 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 399 [2022-11-25 17:37:01,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:37:02,011 INFO L130 PetriNetUnfolder]: 720/1317 cut-off events. [2022-11-25 17:37:02,011 INFO L131 PetriNetUnfolder]: For 1338/1338 co-relation queries the response was YES. [2022-11-25 17:37:02,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3701 conditions, 1317 events. 720/1317 cut-off events. For 1338/1338 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5889 event pairs, 97 based on Foata normal form. 64/1283 useless extension candidates. Maximal degree in co-relation 3682. Up to 1059 conditions per place. [2022-11-25 17:37:02,018 INFO L137 encePairwiseOnDemand]: 393/399 looper letters, 56 selfloop transitions, 9 changer transitions 0/65 dead transitions. [2022-11-25 17:37:02,018 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 65 transitions, 450 flow [2022-11-25 17:37:02,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:37:02,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:37:02,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 595 transitions. [2022-11-25 17:37:02,021 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49707602339181284 [2022-11-25 17:37:02,021 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 595 transitions. [2022-11-25 17:37:02,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 595 transitions. [2022-11-25 17:37:02,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:37:02,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 595 transitions. [2022-11-25 17:37:02,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.33333333333334) internal successors, (595), 3 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:02,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:02,025 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:02,025 INFO L175 Difference]: Start difference. First operand has 71 places, 70 transitions, 403 flow. Second operand 3 states and 595 transitions. [2022-11-25 17:37:02,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 65 transitions, 450 flow [2022-11-25 17:37:02,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 65 transitions, 420 flow, removed 11 selfloop flow, removed 6 redundant places. [2022-11-25 17:37:02,032 INFO L231 Difference]: Finished difference. Result has 64 places, 56 transitions, 284 flow [2022-11-25 17:37:02,033 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=284, PETRI_PLACES=64, PETRI_TRANSITIONS=56} [2022-11-25 17:37:02,034 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 16 predicate places. [2022-11-25 17:37:02,034 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 56 transitions, 284 flow [2022-11-25 17:37:02,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:02,034 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:02,034 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:37:02,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 17:37:02,035 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:37:02,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:02,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1887176658, now seen corresponding path program 1 times [2022-11-25 17:37:02,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:37:02,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047459761] [2022-11-25 17:37:02,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:02,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:37:02,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:02,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:02,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:37:02,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047459761] [2022-11-25 17:37:02,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047459761] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:37:02,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:37:02,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-25 17:37:02,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453268778] [2022-11-25 17:37:02,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:37:02,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:37:02,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:37:02,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:37:02,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:37:03,578 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 399 [2022-11-25 17:37:03,580 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 56 transitions, 284 flow. Second operand has 12 states, 12 states have (on average 168.58333333333334) internal successors, (2023), 12 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:03,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:37:03,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 399 [2022-11-25 17:37:03,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:37:04,371 INFO L130 PetriNetUnfolder]: 830/1519 cut-off events. [2022-11-25 17:37:04,371 INFO L131 PetriNetUnfolder]: For 793/793 co-relation queries the response was YES. [2022-11-25 17:37:04,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4278 conditions, 1519 events. 830/1519 cut-off events. For 793/793 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 6861 event pairs, 133 based on Foata normal form. 0/1461 useless extension candidates. Maximal degree in co-relation 4261. Up to 976 conditions per place. [2022-11-25 17:37:04,380 INFO L137 encePairwiseOnDemand]: 388/399 looper letters, 125 selfloop transitions, 13 changer transitions 1/139 dead transitions. [2022-11-25 17:37:04,381 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 139 transitions, 820 flow [2022-11-25 17:37:04,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 17:37:04,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 17:37:04,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1969 transitions. [2022-11-25 17:37:04,387 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44862155388471175 [2022-11-25 17:37:04,387 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1969 transitions. [2022-11-25 17:37:04,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1969 transitions. [2022-11-25 17:37:04,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:37:04,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1969 transitions. [2022-11-25 17:37:04,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 179.0) internal successors, (1969), 11 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:04,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 399.0) internal successors, (4788), 12 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:04,399 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 399.0) internal successors, (4788), 12 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:04,399 INFO L175 Difference]: Start difference. First operand has 64 places, 56 transitions, 284 flow. Second operand 11 states and 1969 transitions. [2022-11-25 17:37:04,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 139 transitions, 820 flow [2022-11-25 17:37:04,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 139 transitions, 799 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:37:04,405 INFO L231 Difference]: Finished difference. Result has 76 places, 62 transitions, 349 flow [2022-11-25 17:37:04,406 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=349, PETRI_PLACES=76, PETRI_TRANSITIONS=62} [2022-11-25 17:37:04,407 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 28 predicate places. [2022-11-25 17:37:04,407 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 62 transitions, 349 flow [2022-11-25 17:37:04,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 168.58333333333334) internal successors, (2023), 12 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:04,408 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:04,408 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:37:04,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 17:37:04,409 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:37:04,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:04,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1457304495, now seen corresponding path program 1 times [2022-11-25 17:37:04,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:37:04,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262598272] [2022-11-25 17:37:04,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:04,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:37:04,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:04,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:04,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:37:04,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262598272] [2022-11-25 17:37:04,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262598272] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:37:04,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:37:04,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:37:04,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022896087] [2022-11-25 17:37:04,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:37:04,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:37:04,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:37:04,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:37:04,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:37:04,767 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 399 [2022-11-25 17:37:04,768 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 62 transitions, 349 flow. Second operand has 6 states, 6 states have (on average 180.16666666666666) internal successors, (1081), 6 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:04,768 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:37:04,768 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 399 [2022-11-25 17:37:04,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:37:05,147 INFO L130 PetriNetUnfolder]: 903/1645 cut-off events. [2022-11-25 17:37:05,147 INFO L131 PetriNetUnfolder]: For 1058/1058 co-relation queries the response was YES. [2022-11-25 17:37:05,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4775 conditions, 1645 events. 903/1645 cut-off events. For 1058/1058 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 7472 event pairs, 103 based on Foata normal form. 0/1575 useless extension candidates. Maximal degree in co-relation 4754. Up to 814 conditions per place. [2022-11-25 17:37:05,157 INFO L137 encePairwiseOnDemand]: 392/399 looper letters, 89 selfloop transitions, 8 changer transitions 1/98 dead transitions. [2022-11-25 17:37:05,157 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 98 transitions, 689 flow [2022-11-25 17:37:05,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:37:05,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:37:05,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1314 transitions. [2022-11-25 17:37:05,161 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47046186895810954 [2022-11-25 17:37:05,161 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1314 transitions. [2022-11-25 17:37:05,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1314 transitions. [2022-11-25 17:37:05,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:37:05,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1314 transitions. [2022-11-25 17:37:05,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 187.71428571428572) internal successors, (1314), 7 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:05,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 399.0) internal successors, (3192), 8 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:05,170 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 399.0) internal successors, (3192), 8 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:05,170 INFO L175 Difference]: Start difference. First operand has 76 places, 62 transitions, 349 flow. Second operand 7 states and 1314 transitions. [2022-11-25 17:37:05,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 98 transitions, 689 flow [2022-11-25 17:37:05,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 98 transitions, 679 flow, removed 1 selfloop flow, removed 4 redundant places. [2022-11-25 17:37:05,177 INFO L231 Difference]: Finished difference. Result has 78 places, 64 transitions, 380 flow [2022-11-25 17:37:05,177 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=380, PETRI_PLACES=78, PETRI_TRANSITIONS=64} [2022-11-25 17:37:05,179 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 30 predicate places. [2022-11-25 17:37:05,179 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 64 transitions, 380 flow [2022-11-25 17:37:05,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 180.16666666666666) internal successors, (1081), 6 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:05,180 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:05,180 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:37:05,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-25 17:37:05,180 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:37:05,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:05,181 INFO L85 PathProgramCache]: Analyzing trace with hash -304546277, now seen corresponding path program 1 times [2022-11-25 17:37:05,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:37:05,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371478468] [2022-11-25 17:37:05,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:05,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:37:05,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:05,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:37:05,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:37:05,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371478468] [2022-11-25 17:37:05,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371478468] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:37:05,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:37:05,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:37:05,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652591953] [2022-11-25 17:37:05,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:37:05,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:37:05,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:37:05,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:37:05,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:37:05,252 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 399 [2022-11-25 17:37:05,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 64 transitions, 380 flow. Second operand has 3 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:05,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:37:05,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 399 [2022-11-25 17:37:05,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:37:05,609 INFO L130 PetriNetUnfolder]: 1156/2140 cut-off events. [2022-11-25 17:37:05,609 INFO L131 PetriNetUnfolder]: For 1997/1997 co-relation queries the response was YES. [2022-11-25 17:37:05,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6327 conditions, 2140 events. 1156/2140 cut-off events. For 1997/1997 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 10810 event pairs, 692 based on Foata normal form. 84/2108 useless extension candidates. Maximal degree in co-relation 6304. Up to 1608 conditions per place. [2022-11-25 17:37:05,622 INFO L137 encePairwiseOnDemand]: 395/399 looper letters, 106 selfloop transitions, 3 changer transitions 0/109 dead transitions. [2022-11-25 17:37:05,622 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 109 transitions, 857 flow [2022-11-25 17:37:05,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:37:05,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:37:05,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 617 transitions. [2022-11-25 17:37:05,625 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5154553049289892 [2022-11-25 17:37:05,625 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 617 transitions. [2022-11-25 17:37:05,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 617 transitions. [2022-11-25 17:37:05,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:37:05,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 617 transitions. [2022-11-25 17:37:05,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:05,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:05,630 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:05,631 INFO L175 Difference]: Start difference. First operand has 78 places, 64 transitions, 380 flow. Second operand 3 states and 617 transitions. [2022-11-25 17:37:05,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 109 transitions, 857 flow [2022-11-25 17:37:05,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 109 transitions, 849 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 17:37:05,638 INFO L231 Difference]: Finished difference. Result has 78 places, 66 transitions, 396 flow [2022-11-25 17:37:05,639 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=396, PETRI_PLACES=78, PETRI_TRANSITIONS=66} [2022-11-25 17:37:05,639 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 30 predicate places. [2022-11-25 17:37:05,639 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 66 transitions, 396 flow [2022-11-25 17:37:05,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:05,640 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:05,640 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:37:05,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-25 17:37:05,640 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:37:05,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:05,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1202210514, now seen corresponding path program 1 times [2022-11-25 17:37:05,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:37:05,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274409912] [2022-11-25 17:37:05,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:05,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:37:05,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:06,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:06,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:37:06,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274409912] [2022-11-25 17:37:06,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274409912] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:37:06,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:37:06,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-25 17:37:06,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836604900] [2022-11-25 17:37:06,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:37:06,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 17:37:06,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:37:06,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 17:37:06,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:37:08,010 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 399 [2022-11-25 17:37:08,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 66 transitions, 396 flow. Second operand has 14 states, 14 states have (on average 161.5) internal successors, (2261), 14 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:08,012 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:37:08,012 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 399 [2022-11-25 17:37:08,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:37:09,427 INFO L130 PetriNetUnfolder]: 1405/2602 cut-off events. [2022-11-25 17:37:09,428 INFO L131 PetriNetUnfolder]: For 2455/2455 co-relation queries the response was YES. [2022-11-25 17:37:09,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8156 conditions, 2602 events. 1405/2602 cut-off events. For 2455/2455 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 13368 event pairs, 322 based on Foata normal form. 12/2528 useless extension candidates. Maximal degree in co-relation 8132. Up to 1967 conditions per place. [2022-11-25 17:37:09,446 INFO L137 encePairwiseOnDemand]: 383/399 looper letters, 141 selfloop transitions, 29 changer transitions 1/171 dead transitions. [2022-11-25 17:37:09,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 171 transitions, 1158 flow [2022-11-25 17:37:09,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 17:37:09,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-25 17:37:09,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2864 transitions. [2022-11-25 17:37:09,454 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42223205071502284 [2022-11-25 17:37:09,454 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2864 transitions. [2022-11-25 17:37:09,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2864 transitions. [2022-11-25 17:37:09,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:37:09,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2864 transitions. [2022-11-25 17:37:09,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 168.47058823529412) internal successors, (2864), 17 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:09,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 399.0) internal successors, (7182), 18 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:09,473 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 399.0) internal successors, (7182), 18 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:09,474 INFO L175 Difference]: Start difference. First operand has 78 places, 66 transitions, 396 flow. Second operand 17 states and 2864 transitions. [2022-11-25 17:37:09,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 171 transitions, 1158 flow [2022-11-25 17:37:09,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 171 transitions, 1145 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:37:09,484 INFO L231 Difference]: Finished difference. Result has 99 places, 90 transitions, 610 flow [2022-11-25 17:37:09,485 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=610, PETRI_PLACES=99, PETRI_TRANSITIONS=90} [2022-11-25 17:37:09,485 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 51 predicate places. [2022-11-25 17:37:09,485 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 90 transitions, 610 flow [2022-11-25 17:37:09,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 161.5) internal successors, (2261), 14 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:09,486 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:09,487 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:37:09,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-25 17:37:09,487 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:37:09,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:09,488 INFO L85 PathProgramCache]: Analyzing trace with hash -699239960, now seen corresponding path program 2 times [2022-11-25 17:37:09,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:37:09,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491679144] [2022-11-25 17:37:09,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:09,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:37:09,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:10,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:10,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:37:10,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491679144] [2022-11-25 17:37:10,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491679144] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:37:10,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:37:10,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-25 17:37:10,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972387279] [2022-11-25 17:37:10,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:37:10,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 17:37:10,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:37:10,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 17:37:10,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:37:12,009 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 399 [2022-11-25 17:37:12,011 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 90 transitions, 610 flow. Second operand has 15 states, 15 states have (on average 157.4) internal successors, (2361), 15 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:12,011 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:37:12,011 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 399 [2022-11-25 17:37:12,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:37:13,486 INFO L130 PetriNetUnfolder]: 1644/3044 cut-off events. [2022-11-25 17:37:13,486 INFO L131 PetriNetUnfolder]: For 3182/3182 co-relation queries the response was YES. [2022-11-25 17:37:13,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10083 conditions, 3044 events. 1644/3044 cut-off events. For 3182/3182 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 16329 event pairs, 411 based on Foata normal form. 12/2952 useless extension candidates. Maximal degree in co-relation 10053. Up to 1987 conditions per place. [2022-11-25 17:37:13,503 INFO L137 encePairwiseOnDemand]: 383/399 looper letters, 142 selfloop transitions, 34 changer transitions 1/177 dead transitions. [2022-11-25 17:37:13,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 177 transitions, 1325 flow [2022-11-25 17:37:13,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 17:37:13,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 17:37:13,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2161 transitions. [2022-11-25 17:37:13,509 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4166184692500482 [2022-11-25 17:37:13,510 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2161 transitions. [2022-11-25 17:37:13,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2161 transitions. [2022-11-25 17:37:13,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:37:13,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2161 transitions. [2022-11-25 17:37:13,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 166.23076923076923) internal successors, (2161), 13 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:13,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 399.0) internal successors, (5586), 14 states have internal predecessors, (5586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:13,524 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 399.0) internal successors, (5586), 14 states have internal predecessors, (5586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:13,524 INFO L175 Difference]: Start difference. First operand has 99 places, 90 transitions, 610 flow. Second operand 13 states and 2161 transitions. [2022-11-25 17:37:13,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 177 transitions, 1325 flow [2022-11-25 17:37:13,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 177 transitions, 1314 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 17:37:13,539 INFO L231 Difference]: Finished difference. Result has 114 places, 101 transitions, 809 flow [2022-11-25 17:37:13,539 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=599, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=809, PETRI_PLACES=114, PETRI_TRANSITIONS=101} [2022-11-25 17:37:13,540 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 66 predicate places. [2022-11-25 17:37:13,540 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 101 transitions, 809 flow [2022-11-25 17:37:13,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 157.4) internal successors, (2361), 15 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:13,541 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:13,541 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:37:13,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-25 17:37:13,541 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:37:13,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:13,542 INFO L85 PathProgramCache]: Analyzing trace with hash -45387394, now seen corresponding path program 3 times [2022-11-25 17:37:13,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:37:13,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776902913] [2022-11-25 17:37:13,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:13,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:37:13,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:14,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:14,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:37:14,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776902913] [2022-11-25 17:37:14,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776902913] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:37:14,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:37:14,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-25 17:37:14,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080286839] [2022-11-25 17:37:14,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:37:14,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 17:37:14,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:37:14,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 17:37:14,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:37:16,288 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 399 [2022-11-25 17:37:16,290 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 101 transitions, 809 flow. Second operand has 15 states, 15 states have (on average 157.4) internal successors, (2361), 15 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:16,290 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:37:16,291 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 399 [2022-11-25 17:37:16,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:37:17,725 INFO L130 PetriNetUnfolder]: 1632/3020 cut-off events. [2022-11-25 17:37:17,725 INFO L131 PetriNetUnfolder]: For 4309/4309 co-relation queries the response was YES. [2022-11-25 17:37:17,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10695 conditions, 3020 events. 1632/3020 cut-off events. For 4309/4309 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 16100 event pairs, 375 based on Foata normal form. 12/2928 useless extension candidates. Maximal degree in co-relation 10658. Up to 1539 conditions per place. [2022-11-25 17:37:17,750 INFO L137 encePairwiseOnDemand]: 383/399 looper letters, 133 selfloop transitions, 45 changer transitions 1/179 dead transitions. [2022-11-25 17:37:17,750 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 179 transitions, 1465 flow [2022-11-25 17:37:17,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 17:37:17,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 17:37:17,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2317 transitions. [2022-11-25 17:37:17,755 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41478696741854637 [2022-11-25 17:37:17,756 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2317 transitions. [2022-11-25 17:37:17,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2317 transitions. [2022-11-25 17:37:17,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:37:17,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2317 transitions. [2022-11-25 17:37:17,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 165.5) internal successors, (2317), 14 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:17,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 399.0) internal successors, (5985), 15 states have internal predecessors, (5985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:17,769 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 399.0) internal successors, (5985), 15 states have internal predecessors, (5985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:17,770 INFO L175 Difference]: Start difference. First operand has 114 places, 101 transitions, 809 flow. Second operand 14 states and 2317 transitions. [2022-11-25 17:37:17,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 179 transitions, 1465 flow [2022-11-25 17:37:17,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 179 transitions, 1418 flow, removed 14 selfloop flow, removed 5 redundant places. [2022-11-25 17:37:17,795 INFO L231 Difference]: Finished difference. Result has 126 places, 108 transitions, 958 flow [2022-11-25 17:37:17,795 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=770, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=958, PETRI_PLACES=126, PETRI_TRANSITIONS=108} [2022-11-25 17:37:17,797 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 78 predicate places. [2022-11-25 17:37:17,797 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 108 transitions, 958 flow [2022-11-25 17:37:17,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 157.4) internal successors, (2361), 15 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:17,798 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:17,799 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-25 17:37:17,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-25 17:37:17,799 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:37:17,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:17,799 INFO L85 PathProgramCache]: Analyzing trace with hash -325129620, now seen corresponding path program 1 times [2022-11-25 17:37:17,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:37:17,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645433988] [2022-11-25 17:37:17,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:17,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:37:17,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:17,955 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:17,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:37:17,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645433988] [2022-11-25 17:37:17,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645433988] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:37:17,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180408829] [2022-11-25 17:37:17,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:17,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:37:17,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:37:17,957 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:37:17,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:37:18,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:18,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:37:18,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:37:18,154 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:18,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:37:18,235 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:18,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180408829] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:37:18,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:37:18,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2022-11-25 17:37:18,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714454315] [2022-11-25 17:37:18,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:37:18,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 17:37:18,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:37:18,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 17:37:18,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:37:18,342 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 399 [2022-11-25 17:37:18,345 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 108 transitions, 958 flow. Second operand has 14 states, 14 states have (on average 181.78571428571428) internal successors, (2545), 14 states have internal predecessors, (2545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:18,345 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:37:18,345 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 399 [2022-11-25 17:37:18,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:37:19,406 INFO L130 PetriNetUnfolder]: 2292/4230 cut-off events. [2022-11-25 17:37:19,407 INFO L131 PetriNetUnfolder]: For 7028/7028 co-relation queries the response was YES. [2022-11-25 17:37:19,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15241 conditions, 4230 events. 2292/4230 cut-off events. For 7028/7028 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 21434 event pairs, 537 based on Foata normal form. 46/4124 useless extension candidates. Maximal degree in co-relation 15199. Up to 1351 conditions per place. [2022-11-25 17:37:19,441 INFO L137 encePairwiseOnDemand]: 391/399 looper letters, 231 selfloop transitions, 46 changer transitions 0/277 dead transitions. [2022-11-25 17:37:19,441 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 277 transitions, 2373 flow [2022-11-25 17:37:19,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 17:37:19,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 17:37:19,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2514 transitions. [2022-11-25 17:37:19,448 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48467322151532677 [2022-11-25 17:37:19,448 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2514 transitions. [2022-11-25 17:37:19,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2514 transitions. [2022-11-25 17:37:19,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:37:19,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2514 transitions. [2022-11-25 17:37:19,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 193.3846153846154) internal successors, (2514), 13 states have internal predecessors, (2514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:19,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 399.0) internal successors, (5586), 14 states have internal predecessors, (5586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:19,465 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 399.0) internal successors, (5586), 14 states have internal predecessors, (5586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:19,466 INFO L175 Difference]: Start difference. First operand has 126 places, 108 transitions, 958 flow. Second operand 13 states and 2514 transitions. [2022-11-25 17:37:19,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 277 transitions, 2373 flow [2022-11-25 17:37:19,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 277 transitions, 2308 flow, removed 14 selfloop flow, removed 8 redundant places. [2022-11-25 17:37:19,500 INFO L231 Difference]: Finished difference. Result has 135 places, 132 transitions, 1278 flow [2022-11-25 17:37:19,500 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1278, PETRI_PLACES=135, PETRI_TRANSITIONS=132} [2022-11-25 17:37:19,501 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 87 predicate places. [2022-11-25 17:37:19,501 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 132 transitions, 1278 flow [2022-11-25 17:37:19,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 181.78571428571428) internal successors, (2545), 14 states have internal predecessors, (2545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:19,502 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:19,502 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:37:19,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:37:19,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:37:19,709 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:37:19,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:19,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1767954555, now seen corresponding path program 1 times [2022-11-25 17:37:19,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:37:19,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516971315] [2022-11-25 17:37:19,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:19,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:37:19,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:19,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:19,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:37:19,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516971315] [2022-11-25 17:37:19,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516971315] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:37:19,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924751418] [2022-11-25 17:37:19,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:19,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:37:19,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:37:19,767 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:37:19,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:37:19,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:19,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:37:19,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:37:19,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:19,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:37:19,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:19,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924751418] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:37:19,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:37:19,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-25 17:37:19,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398365048] [2022-11-25 17:37:19,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:37:19,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:37:19,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:37:19,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:37:19,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:37:19,950 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 399 [2022-11-25 17:37:19,951 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 132 transitions, 1278 flow. Second operand has 7 states, 7 states have (on average 187.85714285714286) internal successors, (1315), 7 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:19,951 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:37:19,951 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 399 [2022-11-25 17:37:19,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:37:21,465 INFO L130 PetriNetUnfolder]: 4511/8433 cut-off events. [2022-11-25 17:37:21,465 INFO L131 PetriNetUnfolder]: For 20344/20344 co-relation queries the response was YES. [2022-11-25 17:37:21,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31941 conditions, 8433 events. 4511/8433 cut-off events. For 20344/20344 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 52545 event pairs, 975 based on Foata normal form. 1080/9043 useless extension candidates. Maximal degree in co-relation 31893. Up to 2102 conditions per place. [2022-11-25 17:37:21,529 INFO L137 encePairwiseOnDemand]: 393/399 looper letters, 445 selfloop transitions, 23 changer transitions 0/468 dead transitions. [2022-11-25 17:37:21,530 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 468 transitions, 5511 flow [2022-11-25 17:37:21,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:37:21,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:37:21,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1239 transitions. [2022-11-25 17:37:21,532 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5175438596491229 [2022-11-25 17:37:21,533 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1239 transitions. [2022-11-25 17:37:21,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1239 transitions. [2022-11-25 17:37:21,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:37:21,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1239 transitions. [2022-11-25 17:37:21,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 206.5) internal successors, (1239), 6 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:21,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 399.0) internal successors, (2793), 7 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:21,540 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 399.0) internal successors, (2793), 7 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:21,540 INFO L175 Difference]: Start difference. First operand has 135 places, 132 transitions, 1278 flow. Second operand 6 states and 1239 transitions. [2022-11-25 17:37:21,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 468 transitions, 5511 flow [2022-11-25 17:37:21,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 468 transitions, 5201 flow, removed 155 selfloop flow, removed 0 redundant places. [2022-11-25 17:37:21,631 INFO L231 Difference]: Finished difference. Result has 144 places, 144 transitions, 1416 flow [2022-11-25 17:37:21,763 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=1204, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1416, PETRI_PLACES=144, PETRI_TRANSITIONS=144} [2022-11-25 17:37:21,763 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 96 predicate places. [2022-11-25 17:37:21,763 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 144 transitions, 1416 flow [2022-11-25 17:37:21,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 187.85714285714286) internal successors, (1315), 7 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:21,764 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:21,764 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:37:21,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:37:21,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:37:21,964 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:37:21,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:21,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1542057336, now seen corresponding path program 1 times [2022-11-25 17:37:21,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:37:21,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723882618] [2022-11-25 17:37:21,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:21,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:37:21,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:37:21,995 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:37:22,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:37:22,069 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:37:22,069 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:37:22,071 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (22 of 23 remaining) [2022-11-25 17:37:22,075 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 23 remaining) [2022-11-25 17:37:22,075 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2022-11-25 17:37:22,075 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2022-11-25 17:37:22,076 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2022-11-25 17:37:22,076 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 23 remaining) [2022-11-25 17:37:22,076 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2022-11-25 17:37:22,076 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2022-11-25 17:37:22,076 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2022-11-25 17:37:22,077 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (13 of 23 remaining) [2022-11-25 17:37:22,077 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 23 remaining) [2022-11-25 17:37:22,077 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 23 remaining) [2022-11-25 17:37:22,077 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 23 remaining) [2022-11-25 17:37:22,077 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 23 remaining) [2022-11-25 17:37:22,078 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (8 of 23 remaining) [2022-11-25 17:37:22,078 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (7 of 23 remaining) [2022-11-25 17:37:22,078 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 23 remaining) [2022-11-25 17:37:22,078 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 23 remaining) [2022-11-25 17:37:22,080 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 23 remaining) [2022-11-25 17:37:22,080 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 23 remaining) [2022-11-25 17:37:22,080 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (2 of 23 remaining) [2022-11-25 17:37:22,080 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 23 remaining) [2022-11-25 17:37:22,081 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 23 remaining) [2022-11-25 17:37:22,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-25 17:37:22,081 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:37:22,087 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-11-25 17:37:22,087 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-25 17:37:22,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 05:37:22 BasicIcfg [2022-11-25 17:37:22,173 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-25 17:37:22,174 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-25 17:37:22,174 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-25 17:37:22,174 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-25 17:37:22,175 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:36:42" (3/4) ... [2022-11-25 17:37:22,177 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-25 17:37:22,177 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-25 17:37:22,178 INFO L158 Benchmark]: Toolchain (without parser) took 41105.68ms. Allocated memory was 182.5MB in the beginning and 388.0MB in the end (delta: 205.5MB). Free memory was 136.1MB in the beginning and 242.5MB in the end (delta: -106.5MB). Peak memory consumption was 102.1MB. Max. memory is 16.1GB. [2022-11-25 17:37:22,178 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 109.1MB. Free memory was 78.9MB in the beginning and 78.8MB in the end (delta: 82.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 17:37:22,179 INFO L158 Benchmark]: CACSL2BoogieTranslator took 943.50ms. Allocated memory is still 182.5MB. Free memory was 135.3MB in the beginning and 105.8MB in the end (delta: 29.5MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2022-11-25 17:37:22,179 INFO L158 Benchmark]: Boogie Procedure Inliner took 89.46ms. Allocated memory is still 182.5MB. Free memory was 105.8MB in the beginning and 103.1MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 17:37:22,179 INFO L158 Benchmark]: Boogie Preprocessor took 65.10ms. Allocated memory is still 182.5MB. Free memory was 103.1MB in the beginning and 101.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 17:37:22,180 INFO L158 Benchmark]: RCFGBuilder took 665.37ms. Allocated memory is still 182.5MB. Free memory was 101.1MB in the beginning and 81.6MB in the end (delta: 19.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-11-25 17:37:22,181 INFO L158 Benchmark]: TraceAbstraction took 39328.51ms. Allocated memory was 182.5MB in the beginning and 388.0MB in the end (delta: 205.5MB). Free memory was 80.8MB in the beginning and 242.5MB in the end (delta: -161.8MB). Peak memory consumption was 45.5MB. Max. memory is 16.1GB. [2022-11-25 17:37:22,183 INFO L158 Benchmark]: Witness Printer took 3.91ms. Allocated memory is still 388.0MB. Free memory is still 242.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 17:37:22,186 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 109.1MB. Free memory was 78.9MB in the beginning and 78.8MB in the end (delta: 82.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 943.50ms. Allocated memory is still 182.5MB. Free memory was 135.3MB in the beginning and 105.8MB in the end (delta: 29.5MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 89.46ms. Allocated memory is still 182.5MB. Free memory was 105.8MB in the beginning and 103.1MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 65.10ms. Allocated memory is still 182.5MB. Free memory was 103.1MB in the beginning and 101.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 665.37ms. Allocated memory is still 182.5MB. Free memory was 101.1MB in the beginning and 81.6MB in the end (delta: 19.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 39328.51ms. Allocated memory was 182.5MB in the beginning and 388.0MB in the end (delta: 205.5MB). Free memory was 80.8MB in the beginning and 242.5MB in the end (delta: -161.8MB). Peak memory consumption was 45.5MB. Max. memory is 16.1GB. * Witness Printer took 3.91ms. Allocated memory is still 388.0MB. Free memory is still 242.5MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6.6s, 189 PlacesBefore, 48 PlacesAfterwards, 192 TransitionsBefore, 46 TransitionsAfterwards, 11140 CoEnabledTransitionPairs, 6 FixpointIterations, 50 TrivialSequentialCompositions, 123 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 22 ConcurrentYvCompositions, 5 ChoiceCompositions, 200 TotalNumberOfCompositions, 14784 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 12116, independent: 11929, independent conditional: 0, independent unconditional: 11929, dependent: 187, dependent conditional: 0, dependent unconditional: 187, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 7908, independent: 7836, independent conditional: 0, independent unconditional: 7836, dependent: 72, dependent conditional: 0, dependent unconditional: 72, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 7908, independent: 7813, independent conditional: 0, independent unconditional: 7813, dependent: 95, dependent conditional: 0, dependent unconditional: 95, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 95, independent: 23, independent conditional: 0, independent unconditional: 23, dependent: 72, dependent conditional: 0, dependent unconditional: 72, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 230, independent: 38, independent conditional: 0, independent unconditional: 38, dependent: 192, dependent conditional: 0, dependent unconditional: 192, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 12116, independent: 4093, independent conditional: 0, independent unconditional: 4093, dependent: 115, dependent conditional: 0, dependent unconditional: 115, unknown: 7908, unknown conditional: 0, unknown unconditional: 7908] , Statistics on independence cache: Total cache size (in pairs): 414, Positive cache size: 387, Positive conditional cache size: 0, Positive unconditional cache size: 387, Negative cache size: 27, Negative conditional cache size: 0, Negative unconditional cache size: 27, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - UnprovableResult [Line: 941]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 941. Possible FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(5)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1021] 0 pthread_t id1, id2; [L1023] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={9:0}, id2={6:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=13, top=0] [L990] 1 int i; [L991] 1 unsigned int tmp; [L992] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1024] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={9:0}, id2={6:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=14, top=0] [L992] COND TRUE 1 i<(5) [L995] 1 tmp = __VERIFIER_nondet_uint() [L996] CALL 1 assume_abort_if_not(tmp < (5)) [L23] COND FALSE 1 !(!cond) [L996] RET 1 assume_abort_if_not(tmp < (5)) [L997] CALL, EXPR 1 push(arr,tmp) [L962] COND FALSE 1 !(top==(5)) VAL [\old(x)=4, arr={3:0}, flag=0, m={4:0}, stack={3:0}, stack={3:0}, top=0, x=4] [L969] CALL, EXPR 1 get_top() [L954] 1 return top; [L969] RET, EXPR 1 get_top() [L969] 1 stack[get_top()] = x VAL [\old(x)=4, arr={3:0}, flag=0, get_top()=0, m={4:0}, stack={3:0}, stack={3:0}, top=0, x=4] [L970] CALL 1 inc_top() [L946] 1 top++ [L970] RET 1 inc_top() [L972] 1 return 0; [L997] RET, EXPR 1 push(arr,tmp) [L997] COND FALSE 1 !(push(arr,tmp)==(-1)) [L999] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=4, top=1] [L992] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=4, top=1] [L1006] 2 int i; [L1007] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, top=1] [L1007] COND TRUE 2 i<(5) [L1010] COND TRUE 2 \read(flag) [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; [L976] RET, EXPR 2 get_top() [L976] COND FALSE 2 !(get_top()==0) [L983] CALL 2 dec_top() [L950] 2 top-- [L983] RET 2 dec_top() [L984] CALL, EXPR 2 get_top() [L954] 2 return top; [L984] RET, EXPR 2 get_top() [L984] EXPR 2 stack[get_top()] [L984] 2 return stack[get_top()]; [L1012] RET, EXPR 2 pop(arr) [L1012] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1007] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1007] COND TRUE 2 i<(5) [L1010] COND TRUE 2 \read(flag) [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; [L976] RET, EXPR 2 get_top() [L976] COND TRUE 2 get_top()==0 [L979] 2 return (-2); [L1012] RET, EXPR 2 pop(arr) [L1012] COND TRUE 2 !(pop(arr)!=(-2)) [L1013] CALL 2 error() [L941] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1019]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1023]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1024]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 941]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 312 locations, 23 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 39.0s, OverallIterations: 22, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 24.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 6.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5509 SdHoareTripleChecker+Valid, 14.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4646 mSDsluCounter, 5629 SdHoareTripleChecker+Invalid, 12.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5311 mSDsCounter, 171 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 22135 IncrementalHoareTripleChecker+Invalid, 22306 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 171 mSolverCounterUnsat, 318 mSDtfsCounter, 22135 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 269 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 3.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1416occurred in iteration=21, InterpolantAutomatonStates: 137, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 5.6s InterpolantComputationTime, 348 NumberOfCodeBlocks, 348 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 356 ConstructedInterpolants, 0 QuantifiedInterpolants, 2893 SizeOfPredicates, 14 NumberOfNonLiveVariables, 713 ConjunctsInSsa, 49 ConjunctsInUnsatCore, 27 InterpolantComputations, 18 PerfectInterpolantSequences, 10/58 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-25 17:37:22,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/stack-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R --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 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 17:37:24,528 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:37:24,531 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:37:24,575 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:37:24,577 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:37:24,582 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:37:24,583 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:37:24,587 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:37:24,590 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:37:24,592 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:37:24,594 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:37:24,598 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:37:24,598 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:37:24,603 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:37:24,604 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:37:24,606 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:37:24,607 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:37:24,609 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:37:24,612 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:37:24,616 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:37:24,621 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:37:24,625 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:37:24,626 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:37:24,629 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:37:24,633 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:37:24,636 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:37:24,636 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:37:24,637 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:37:24,639 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:37:24,640 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:37:24,640 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:37:24,641 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:37:24,642 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:37:24,643 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:37:24,654 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:37:24,654 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:37:24,654 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:37:24,655 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:37:24,655 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:37:24,656 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:37:24,656 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:37:24,657 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-25 17:37:24,681 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:37:24,682 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:37:24,682 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:37:24,682 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:37:24,683 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:37:24,683 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:37:24,684 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:37:24,684 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:37:24,685 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:37:24,685 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:37:24,685 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:37:24,685 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:37:24,686 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:37:24,686 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:37:24,686 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:37:24,686 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:37:24,687 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:37:24,687 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:37:24,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:37:24,687 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:37:24,687 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-25 17:37:24,688 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-25 17:37:24,688 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:37:24,688 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:37:24,688 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:37:24,689 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:37:24,689 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:37:24,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:37:24,690 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:37:24,690 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:37:24,690 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-25 17:37:24,690 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-25 17:37:24,690 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:37:24,691 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:37:24,691 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:37:24,691 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-11-25 17:37:24,691 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 [2022-11-25 17:37:25,045 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:37:25,066 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:37:25,069 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:37:25,070 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:37:25,071 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:37:25,072 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/pthread/stack-2.i [2022-11-25 17:37:28,145 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:37:28,510 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:37:28,515 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/sv-benchmarks/c/pthread/stack-2.i [2022-11-25 17:37:28,535 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/data/24fd3edb7/2ba3bb77df2c494885150249f87eace2/FLAGcd590fc62 [2022-11-25 17:37:28,560 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/data/24fd3edb7/2ba3bb77df2c494885150249f87eace2 [2022-11-25 17:37:28,563 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:37:28,566 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:37:28,569 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:37:28,570 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:37:28,574 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:37:28,574 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:37:28" (1/1) ... [2022-11-25 17:37:28,576 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@642ff0cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:28, skipping insertion in model container [2022-11-25 17:37:28,577 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:37:28" (1/1) ... [2022-11-25 17:37:28,584 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:37:28,648 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:37:29,251 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/sv-benchmarks/c/pthread/stack-2.i[41520,41533] [2022-11-25 17:37:29,286 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:37:29,313 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:37:29,397 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/sv-benchmarks/c/pthread/stack-2.i[41520,41533] [2022-11-25 17:37:29,407 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:37:29,493 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:37:29,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:29 WrapperNode [2022-11-25 17:37:29,494 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:37:29,495 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:37:29,495 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:37:29,496 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:37:29,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:29" (1/1) ... [2022-11-25 17:37:29,526 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:29" (1/1) ... [2022-11-25 17:37:29,552 INFO L138 Inliner]: procedures = 281, calls = 44, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 155 [2022-11-25 17:37:29,552 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:37:29,553 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:37:29,553 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:37:29,553 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:37:29,562 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:29" (1/1) ... [2022-11-25 17:37:29,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:29" (1/1) ... [2022-11-25 17:37:29,567 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:29" (1/1) ... [2022-11-25 17:37:29,568 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:29" (1/1) ... [2022-11-25 17:37:29,575 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:29" (1/1) ... [2022-11-25 17:37:29,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:29" (1/1) ... [2022-11-25 17:37:29,585 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:29" (1/1) ... [2022-11-25 17:37:29,589 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:29" (1/1) ... [2022-11-25 17:37:29,593 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:37:29,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:37:29,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:37:29,596 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:37:29,597 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:29" (1/1) ... [2022-11-25 17:37:29,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:37:29,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:37:29,636 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:37:29,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:37:29,682 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-25 17:37:29,683 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-25 17:37:29,684 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-25 17:37:29,684 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-25 17:37:29,684 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-25 17:37:29,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:37:29,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:37:29,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-25 17:37:29,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-25 17:37:29,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2022-11-25 17:37:29,685 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-25 17:37:29,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:37:29,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:37:29,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:37:29,687 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:37:29,915 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:37:29,917 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:37:30,350 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:37:30,358 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:37:30,358 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 17:37:30,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:37:30 BoogieIcfgContainer [2022-11-25 17:37:30,361 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:37:30,365 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:37:30,366 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:37:30,370 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:37:30,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:37:28" (1/3) ... [2022-11-25 17:37:30,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52c9a683 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:37:30, skipping insertion in model container [2022-11-25 17:37:30,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:37:29" (2/3) ... [2022-11-25 17:37:30,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52c9a683 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:37:30, skipping insertion in model container [2022-11-25 17:37:30,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:37:30" (3/3) ... [2022-11-25 17:37:30,375 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-2.i [2022-11-25 17:37:30,395 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:37:30,395 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-11-25 17:37:30,395 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:37:30,537 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 17:37:30,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 195 transitions, 406 flow [2022-11-25 17:37:30,667 INFO L130 PetriNetUnfolder]: 10/193 cut-off events. [2022-11-25 17:37:30,667 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:37:30,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 193 events. 10/193 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 491 event pairs, 0 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 138. Up to 3 conditions per place. [2022-11-25 17:37:30,674 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 195 transitions, 406 flow [2022-11-25 17:37:30,680 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 185 places, 188 transitions, 388 flow [2022-11-25 17:37:30,684 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:37:30,697 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 185 places, 188 transitions, 388 flow [2022-11-25 17:37:30,700 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 185 places, 188 transitions, 388 flow [2022-11-25 17:37:30,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 185 places, 188 transitions, 388 flow [2022-11-25 17:37:30,763 INFO L130 PetriNetUnfolder]: 10/188 cut-off events. [2022-11-25 17:37:30,772 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:37:30,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 188 events. 10/188 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 468 event pairs, 0 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 138. Up to 3 conditions per place. [2022-11-25 17:37:30,783 INFO L119 LiptonReduction]: Number of co-enabled transitions 10398 [2022-11-25 17:37:44,323 INFO L134 LiptonReduction]: Checked pairs total: 15873 [2022-11-25 17:37:44,324 INFO L136 LiptonReduction]: Total number of compositions: 200 [2022-11-25 17:37:44,353 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:37:44,361 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=PETRI_NET, 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;@46d45c19, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:37:44,362 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2022-11-25 17:37:44,369 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-11-25 17:37:44,369 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:37:44,369 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:44,370 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-25 17:37:44,371 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:37:44,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:44,378 INFO L85 PathProgramCache]: Analyzing trace with hash 798, now seen corresponding path program 1 times [2022-11-25 17:37:44,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:37:44,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [523419531] [2022-11-25 17:37:44,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:44,392 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:37:44,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:37:44,400 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:37:44,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-25 17:37:44,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:44,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 3 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-25 17:37:44,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:37:44,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:44,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:37:44,526 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:37:44,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [523419531] [2022-11-25 17:37:44,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [523419531] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:37:44,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:37:44,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-25 17:37:44,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082308904] [2022-11-25 17:37:44,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:37:44,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 17:37:44,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:37:44,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 17:37:44,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:37:44,568 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 395 [2022-11-25 17:37:44,573 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 106 flow. Second operand has 2 states, 2 states have (on average 184.5) internal successors, (369), 2 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:44,574 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:37:44,574 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 395 [2022-11-25 17:37:44,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:37:45,118 INFO L130 PetriNetUnfolder]: 1456/2239 cut-off events. [2022-11-25 17:37:45,118 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-25 17:37:45,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4524 conditions, 2239 events. 1456/2239 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 10323 event pairs, 1176 based on Foata normal form. 0/1233 useless extension candidates. Maximal degree in co-relation 4272. Up to 2240 conditions per place. [2022-11-25 17:37:45,137 INFO L137 encePairwiseOnDemand]: 392/395 looper letters, 44 selfloop transitions, 0 changer transitions 0/44 dead transitions. [2022-11-25 17:37:45,138 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 44 transitions, 188 flow [2022-11-25 17:37:45,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 17:37:45,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 17:37:45,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 415 transitions. [2022-11-25 17:37:45,162 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5253164556962026 [2022-11-25 17:37:45,162 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 415 transitions. [2022-11-25 17:37:45,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 415 transitions. [2022-11-25 17:37:45,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:37:45,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 415 transitions. [2022-11-25 17:37:45,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 207.5) internal successors, (415), 2 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:45,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 395.0) internal successors, (1185), 3 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:45,183 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 395.0) internal successors, (1185), 3 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:45,184 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 106 flow. Second operand 2 states and 415 transitions. [2022-11-25 17:37:45,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 44 transitions, 188 flow [2022-11-25 17:37:45,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 180 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 17:37:45,222 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 92 flow [2022-11-25 17:37:45,224 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=92, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2022-11-25 17:37:45,227 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2022-11-25 17:37:45,227 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 92 flow [2022-11-25 17:37:45,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 184.5) internal successors, (369), 2 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:45,228 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:45,228 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:37:45,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:37:45,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:37:45,437 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:37:45,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:45,438 INFO L85 PathProgramCache]: Analyzing trace with hash 783124, now seen corresponding path program 1 times [2022-11-25 17:37:45,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:37:45,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1869074772] [2022-11-25 17:37:45,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:45,439 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:37:45,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:37:45,444 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:37:45,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-25 17:37:45,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:45,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:37:45,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:37:45,682 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:37:45,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-25 17:37:45,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:45,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:37:45,715 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:37:45,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1869074772] [2022-11-25 17:37:45,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1869074772] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:37:45,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:37:45,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:37:45,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196405018] [2022-11-25 17:37:45,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:37:45,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:37:45,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:37:45,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:37:45,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:37:45,842 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 395 [2022-11-25 17:37:45,843 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:45,843 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:37:45,844 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 395 [2022-11-25 17:37:45,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:37:46,220 INFO L130 PetriNetUnfolder]: 1427/2184 cut-off events. [2022-11-25 17:37:46,221 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-25 17:37:46,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4385 conditions, 2184 events. 1427/2184 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 9976 event pairs, 1152 based on Foata normal form. 0/1215 useless extension candidates. Maximal degree in co-relation 4382. Up to 2183 conditions per place. [2022-11-25 17:37:46,232 INFO L137 encePairwiseOnDemand]: 391/395 looper letters, 40 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2022-11-25 17:37:46,232 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 42 transitions, 172 flow [2022-11-25 17:37:46,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:37:46,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:37:46,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 581 transitions. [2022-11-25 17:37:46,235 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.490295358649789 [2022-11-25 17:37:46,235 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 581 transitions. [2022-11-25 17:37:46,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 581 transitions. [2022-11-25 17:37:46,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:37:46,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 581 transitions. [2022-11-25 17:37:46,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:46,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:46,244 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:46,244 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 92 flow. Second operand 3 states and 581 transitions. [2022-11-25 17:37:46,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 42 transitions, 172 flow [2022-11-25 17:37:46,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 42 transitions, 172 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:37:46,246 INFO L231 Difference]: Finished difference. Result has 43 places, 42 transitions, 92 flow [2022-11-25 17:37:46,246 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=43, PETRI_TRANSITIONS=42} [2022-11-25 17:37:46,247 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2022-11-25 17:37:46,247 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 42 transitions, 92 flow [2022-11-25 17:37:46,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:46,248 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:46,249 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:37:46,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:37:46,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:37:46,461 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:37:46,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:46,461 INFO L85 PathProgramCache]: Analyzing trace with hash 783125, now seen corresponding path program 1 times [2022-11-25 17:37:46,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:37:46,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1020809986] [2022-11-25 17:37:46,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:46,462 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:37:46,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:37:46,466 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:37:46,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-25 17:37:46,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:46,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:37:46,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:37:46,583 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 17:37:46,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 19 [2022-11-25 17:37:46,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:46,601 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:37:46,602 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:37:46,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1020809986] [2022-11-25 17:37:46,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1020809986] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:37:46,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:37:46,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:37:46,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9831261] [2022-11-25 17:37:46,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:37:46,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:37:46,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:37:46,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:37:46,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:37:46,703 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 395 [2022-11-25 17:37:46,704 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:46,704 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:37:46,704 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 395 [2022-11-25 17:37:46,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:37:46,984 INFO L130 PetriNetUnfolder]: 1398/2129 cut-off events. [2022-11-25 17:37:46,984 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-25 17:37:46,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4278 conditions, 2129 events. 1398/2129 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 9611 event pairs, 1128 based on Foata normal form. 0/1197 useless extension candidates. Maximal degree in co-relation 4274. Up to 2128 conditions per place. [2022-11-25 17:37:46,996 INFO L137 encePairwiseOnDemand]: 391/395 looper letters, 38 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2022-11-25 17:37:46,996 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 168 flow [2022-11-25 17:37:46,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:37:46,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:37:46,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 567 transitions. [2022-11-25 17:37:46,998 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47848101265822784 [2022-11-25 17:37:46,999 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 567 transitions. [2022-11-25 17:37:46,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 567 transitions. [2022-11-25 17:37:46,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:37:46,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 567 transitions. [2022-11-25 17:37:47,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:47,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:47,004 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:47,005 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 92 flow. Second operand 3 states and 567 transitions. [2022-11-25 17:37:47,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 168 flow [2022-11-25 17:37:47,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 164 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:37:47,006 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 88 flow [2022-11-25 17:37:47,007 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2022-11-25 17:37:47,007 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -7 predicate places. [2022-11-25 17:37:47,007 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 88 flow [2022-11-25 17:37:47,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:47,008 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:47,008 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:37:47,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:37:47,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:37:47,225 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:37:47,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:47,225 INFO L85 PathProgramCache]: Analyzing trace with hash 752599399, now seen corresponding path program 1 times [2022-11-25 17:37:47,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:37:47,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [302899554] [2022-11-25 17:37:47,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:47,226 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:37:47,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:37:47,233 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:37:47,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-25 17:37:47,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:47,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 17:37:47,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:37:47,363 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 17:37:47,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-25 17:37:47,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:47,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:37:47,411 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:37:47,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [302899554] [2022-11-25 17:37:47,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [302899554] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:37:47,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:37:47,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:37:47,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333126968] [2022-11-25 17:37:47,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:37:47,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:37:47,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:37:47,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:37:47,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:37:47,533 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 395 [2022-11-25 17:37:47,534 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:47,534 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:37:47,534 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 395 [2022-11-25 17:37:47,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:37:47,800 INFO L130 PetriNetUnfolder]: 1021/1583 cut-off events. [2022-11-25 17:37:47,800 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-25 17:37:47,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3186 conditions, 1583 events. 1021/1583 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 6881 event pairs, 816 based on Foata normal form. 0/963 useless extension candidates. Maximal degree in co-relation 3182. Up to 1582 conditions per place. [2022-11-25 17:37:47,809 INFO L137 encePairwiseOnDemand]: 392/395 looper letters, 37 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2022-11-25 17:37:47,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 164 flow [2022-11-25 17:37:47,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:37:47,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:37:47,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 565 transitions. [2022-11-25 17:37:47,812 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4767932489451477 [2022-11-25 17:37:47,812 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 565 transitions. [2022-11-25 17:37:47,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 565 transitions. [2022-11-25 17:37:47,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:37:47,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 565 transitions. [2022-11-25 17:37:47,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:47,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:47,818 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:47,818 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 88 flow. Second operand 3 states and 565 transitions. [2022-11-25 17:37:47,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 164 flow [2022-11-25 17:37:47,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 160 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:37:47,821 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 86 flow [2022-11-25 17:37:47,821 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2022-11-25 17:37:47,823 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -8 predicate places. [2022-11-25 17:37:47,823 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 86 flow [2022-11-25 17:37:47,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:47,824 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:47,824 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:37:47,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-11-25 17:37:48,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:37:48,035 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:37:48,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:48,036 INFO L85 PathProgramCache]: Analyzing trace with hash 752599398, now seen corresponding path program 1 times [2022-11-25 17:37:48,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:37:48,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [603909645] [2022-11-25 17:37:48,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:48,037 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:37:48,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:37:48,038 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:37:48,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-25 17:37:48,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:48,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:37:48,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:37:48,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:37:48,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-25 17:37:48,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-25 17:37:48,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:48,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:37:48,219 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:37:48,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [603909645] [2022-11-25 17:37:48,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [603909645] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:37:48,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:37:48,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:37:48,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247440104] [2022-11-25 17:37:48,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:37:48,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:37:48,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:37:48,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:37:48,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:37:48,334 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 395 [2022-11-25 17:37:48,335 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:48,335 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:37:48,335 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 395 [2022-11-25 17:37:48,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:37:48,534 INFO L130 PetriNetUnfolder]: 644/1037 cut-off events. [2022-11-25 17:37:48,534 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-25 17:37:48,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2094 conditions, 1037 events. 644/1037 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4327 event pairs, 504 based on Foata normal form. 0/729 useless extension candidates. Maximal degree in co-relation 2090. Up to 1036 conditions per place. [2022-11-25 17:37:48,540 INFO L137 encePairwiseOnDemand]: 392/395 looper letters, 36 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2022-11-25 17:37:48,540 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 38 transitions, 160 flow [2022-11-25 17:37:48,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:37:48,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:37:48,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 576 transitions. [2022-11-25 17:37:48,543 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4860759493670886 [2022-11-25 17:37:48,543 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 576 transitions. [2022-11-25 17:37:48,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 576 transitions. [2022-11-25 17:37:48,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:37:48,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 576 transitions. [2022-11-25 17:37:48,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:48,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:48,549 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:48,549 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 86 flow. Second operand 3 states and 576 transitions. [2022-11-25 17:37:48,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 38 transitions, 160 flow [2022-11-25 17:37:48,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 38 transitions, 156 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:37:48,551 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 84 flow [2022-11-25 17:37:48,551 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2022-11-25 17:37:48,552 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -9 predicate places. [2022-11-25 17:37:48,552 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 84 flow [2022-11-25 17:37:48,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:48,553 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:48,553 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:37:48,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:37:48,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:37:48,777 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:37:48,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:48,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1855521548, now seen corresponding path program 1 times [2022-11-25 17:37:48,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:37:48,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [833830925] [2022-11-25 17:37:48,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:48,779 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:37:48,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:37:48,783 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:37:48,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-25 17:37:48,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:48,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 17:37:48,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:37:48,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:48,896 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:37:48,896 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:37:48,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [833830925] [2022-11-25 17:37:48,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [833830925] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:37:48,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:37:48,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:37:48,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12717493] [2022-11-25 17:37:48,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:37:48,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:37:48,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:37:48,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:37:48,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:37:48,921 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 395 [2022-11-25 17:37:48,922 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:48,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:37:48,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 395 [2022-11-25 17:37:48,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:37:49,225 INFO L130 PetriNetUnfolder]: 925/1502 cut-off events. [2022-11-25 17:37:49,225 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-25 17:37:49,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3034 conditions, 1502 events. 925/1502 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 6151 event pairs, 369 based on Foata normal form. 0/1062 useless extension candidates. Maximal degree in co-relation 3030. Up to 953 conditions per place. [2022-11-25 17:37:49,233 INFO L137 encePairwiseOnDemand]: 390/395 looper letters, 62 selfloop transitions, 3 changer transitions 0/65 dead transitions. [2022-11-25 17:37:49,233 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 65 transitions, 273 flow [2022-11-25 17:37:49,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:37:49,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:37:49,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 607 transitions. [2022-11-25 17:37:49,236 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5122362869198313 [2022-11-25 17:37:49,236 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 607 transitions. [2022-11-25 17:37:49,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 607 transitions. [2022-11-25 17:37:49,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:37:49,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 607 transitions. [2022-11-25 17:37:49,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:49,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:49,242 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:49,243 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 84 flow. Second operand 3 states and 607 transitions. [2022-11-25 17:37:49,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 65 transitions, 273 flow [2022-11-25 17:37:49,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 65 transitions, 267 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:37:49,245 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 104 flow [2022-11-25 17:37:49,245 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2022-11-25 17:37:49,246 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -7 predicate places. [2022-11-25 17:37:49,246 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 104 flow [2022-11-25 17:37:49,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:49,247 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:49,247 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:37:49,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-11-25 17:37:49,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:37:49,459 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:37:49,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:49,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1855520971, now seen corresponding path program 1 times [2022-11-25 17:37:49,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:37:49,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1089303032] [2022-11-25 17:37:49,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:49,460 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:37:49,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:37:49,462 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:37:49,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-25 17:37:49,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:49,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:37:49,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:37:49,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:37:49,652 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-25 17:37:49,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 27 [2022-11-25 17:37:49,686 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 17:37:49,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 17:37:50,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:50,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:37:50,040 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:37:50,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1089303032] [2022-11-25 17:37:50,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1089303032] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:37:50,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:37:50,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:37:50,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005639210] [2022-11-25 17:37:50,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:37:50,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:37:50,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:37:50,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:37:50,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:37:51,172 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 395 [2022-11-25 17:37:51,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 104 flow. Second operand has 5 states, 5 states have (on average 178.2) internal successors, (891), 5 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:51,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:37:51,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 395 [2022-11-25 17:37:51,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:37:52,074 INFO L130 PetriNetUnfolder]: 1094/1777 cut-off events. [2022-11-25 17:37:52,074 INFO L131 PetriNetUnfolder]: For 177/177 co-relation queries the response was YES. [2022-11-25 17:37:52,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3819 conditions, 1777 events. 1094/1777 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7762 event pairs, 348 based on Foata normal form. 0/1317 useless extension candidates. Maximal degree in co-relation 3814. Up to 1391 conditions per place. [2022-11-25 17:37:52,084 INFO L137 encePairwiseOnDemand]: 390/395 looper letters, 81 selfloop transitions, 4 changer transitions 0/85 dead transitions. [2022-11-25 17:37:52,084 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 85 transitions, 379 flow [2022-11-25 17:37:52,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:37:52,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:37:52,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 969 transitions. [2022-11-25 17:37:52,088 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49063291139240506 [2022-11-25 17:37:52,088 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 969 transitions. [2022-11-25 17:37:52,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 969 transitions. [2022-11-25 17:37:52,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:37:52,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 969 transitions. [2022-11-25 17:37:52,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 193.8) internal successors, (969), 5 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:52,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 395.0) internal successors, (2370), 6 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:52,096 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 395.0) internal successors, (2370), 6 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:52,096 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 104 flow. Second operand 5 states and 969 transitions. [2022-11-25 17:37:52,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 85 transitions, 379 flow [2022-11-25 17:37:52,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 85 transitions, 371 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:37:52,099 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 128 flow [2022-11-25 17:37:52,100 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=128, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2022-11-25 17:37:52,100 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -2 predicate places. [2022-11-25 17:37:52,101 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 128 flow [2022-11-25 17:37:52,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 178.2) internal successors, (891), 5 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:52,101 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:52,101 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:37:52,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:37:52,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:37:52,314 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:37:52,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:52,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1855520972, now seen corresponding path program 1 times [2022-11-25 17:37:52,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:37:52,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [578395696] [2022-11-25 17:37:52,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:52,315 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:37:52,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:37:52,316 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:37:52,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-25 17:37:52,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:52,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:37:52,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:37:52,468 INFO L321 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2022-11-25 17:37:52,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 38 [2022-11-25 17:37:52,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:52,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:37:52,542 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:37:52,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [578395696] [2022-11-25 17:37:52,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [578395696] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:37:52,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:37:52,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:37:52,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802485433] [2022-11-25 17:37:52,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:37:52,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:37:52,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:37:52,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:37:52,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:37:52,847 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 395 [2022-11-25 17:37:52,849 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 128 flow. Second operand has 5 states, 5 states have (on average 178.2) internal successors, (891), 5 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:52,849 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:37:52,849 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 395 [2022-11-25 17:37:52,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:37:53,250 INFO L130 PetriNetUnfolder]: 1004/1631 cut-off events. [2022-11-25 17:37:53,250 INFO L131 PetriNetUnfolder]: For 239/239 co-relation queries the response was YES. [2022-11-25 17:37:53,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3694 conditions, 1631 events. 1004/1631 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 7033 event pairs, 324 based on Foata normal form. 0/1321 useless extension candidates. Maximal degree in co-relation 3686. Up to 1447 conditions per place. [2022-11-25 17:37:53,259 INFO L137 encePairwiseOnDemand]: 390/395 looper letters, 64 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2022-11-25 17:37:53,260 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 69 transitions, 326 flow [2022-11-25 17:37:53,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:37:53,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:37:53,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 952 transitions. [2022-11-25 17:37:53,263 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4820253164556962 [2022-11-25 17:37:53,263 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 952 transitions. [2022-11-25 17:37:53,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 952 transitions. [2022-11-25 17:37:53,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:37:53,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 952 transitions. [2022-11-25 17:37:53,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 190.4) internal successors, (952), 5 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:53,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 395.0) internal successors, (2370), 6 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:53,270 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 395.0) internal successors, (2370), 6 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:53,270 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 128 flow. Second operand 5 states and 952 transitions. [2022-11-25 17:37:53,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 69 transitions, 326 flow [2022-11-25 17:37:53,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 69 transitions, 324 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:37:53,275 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 136 flow [2022-11-25 17:37:53,275 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=136, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2022-11-25 17:37:53,278 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 0 predicate places. [2022-11-25 17:37:53,278 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 136 flow [2022-11-25 17:37:53,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 178.2) internal successors, (891), 5 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:53,279 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:53,279 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:37:53,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-25 17:37:53,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:37:53,490 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:37:53,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:53,491 INFO L85 PathProgramCache]: Analyzing trace with hash 959435612, now seen corresponding path program 1 times [2022-11-25 17:37:53,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:37:53,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1735525803] [2022-11-25 17:37:53,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:53,491 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:37:53,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:37:53,493 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:37:53,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-25 17:37:53,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:53,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 17:37:53,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:37:53,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:53,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:37:53,628 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:37:53,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1735525803] [2022-11-25 17:37:53,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1735525803] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:37:53,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:37:53,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:37:53,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103931390] [2022-11-25 17:37:53,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:37:53,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:37:53,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:37:53,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:37:53,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:37:53,638 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 395 [2022-11-25 17:37:53,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:53,640 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:37:53,640 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 395 [2022-11-25 17:37:53,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:37:53,994 INFO L130 PetriNetUnfolder]: 1226/2017 cut-off events. [2022-11-25 17:37:53,994 INFO L131 PetriNetUnfolder]: For 384/384 co-relation queries the response was YES. [2022-11-25 17:37:53,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4520 conditions, 2017 events. 1226/2017 cut-off events. For 384/384 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9430 event pairs, 565 based on Foata normal form. 66/1677 useless extension candidates. Maximal degree in co-relation 4512. Up to 1232 conditions per place. [2022-11-25 17:37:54,015 INFO L137 encePairwiseOnDemand]: 390/395 looper letters, 65 selfloop transitions, 3 changer transitions 0/68 dead transitions. [2022-11-25 17:37:54,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 68 transitions, 341 flow [2022-11-25 17:37:54,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:37:54,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:37:54,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 603 transitions. [2022-11-25 17:37:54,018 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5088607594936709 [2022-11-25 17:37:54,018 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 603 transitions. [2022-11-25 17:37:54,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 603 transitions. [2022-11-25 17:37:54,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:37:54,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 603 transitions. [2022-11-25 17:37:54,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:54,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:54,023 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:54,023 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 136 flow. Second operand 3 states and 603 transitions. [2022-11-25 17:37:54,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 68 transitions, 341 flow [2022-11-25 17:37:54,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 68 transitions, 333 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 17:37:54,027 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 155 flow [2022-11-25 17:37:54,027 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=155, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2022-11-25 17:37:54,029 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 1 predicate places. [2022-11-25 17:37:54,029 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 155 flow [2022-11-25 17:37:54,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:54,029 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:54,030 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:37:54,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-25 17:37:54,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:37:54,253 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:37:54,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:54,253 INFO L85 PathProgramCache]: Analyzing trace with hash -2145551171, now seen corresponding path program 1 times [2022-11-25 17:37:54,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:37:54,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [24162444] [2022-11-25 17:37:54,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:54,254 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:37:54,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:37:54,255 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:37:54,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-25 17:37:54,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:54,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:37:54,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:37:54,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:54,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:37:54,357 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:37:54,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [24162444] [2022-11-25 17:37:54,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [24162444] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:37:54,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:37:54,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:37:54,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700656553] [2022-11-25 17:37:54,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:37:54,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:37:54,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:37:54,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:37:54,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:37:54,370 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 395 [2022-11-25 17:37:54,371 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 155 flow. Second operand has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:54,371 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:37:54,371 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 395 [2022-11-25 17:37:54,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:37:54,758 INFO L130 PetriNetUnfolder]: 1307/2148 cut-off events. [2022-11-25 17:37:54,758 INFO L131 PetriNetUnfolder]: For 623/623 co-relation queries the response was YES. [2022-11-25 17:37:54,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5173 conditions, 2148 events. 1307/2148 cut-off events. For 623/623 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10297 event pairs, 950 based on Foata normal form. 58/1954 useless extension candidates. Maximal degree in co-relation 5164. Up to 1990 conditions per place. [2022-11-25 17:37:54,771 INFO L137 encePairwiseOnDemand]: 392/395 looper letters, 62 selfloop transitions, 5 changer transitions 0/67 dead transitions. [2022-11-25 17:37:54,771 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 67 transitions, 358 flow [2022-11-25 17:37:54,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:37:54,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:37:54,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 597 transitions. [2022-11-25 17:37:54,774 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5037974683544304 [2022-11-25 17:37:54,774 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 597 transitions. [2022-11-25 17:37:54,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 597 transitions. [2022-11-25 17:37:54,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:37:54,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 597 transitions. [2022-11-25 17:37:54,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:54,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:54,779 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:54,780 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 155 flow. Second operand 3 states and 597 transitions. [2022-11-25 17:37:54,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 67 transitions, 358 flow [2022-11-25 17:37:54,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 67 transitions, 348 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:37:54,783 INFO L231 Difference]: Finished difference. Result has 50 places, 47 transitions, 178 flow [2022-11-25 17:37:54,784 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=50, PETRI_TRANSITIONS=47} [2022-11-25 17:37:54,784 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 2 predicate places. [2022-11-25 17:37:54,784 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 47 transitions, 178 flow [2022-11-25 17:37:54,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:54,785 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:54,785 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:37:54,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-25 17:37:54,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:37:54,996 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:37:54,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:54,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1664794603, now seen corresponding path program 1 times [2022-11-25 17:37:54,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:37:54,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [375423881] [2022-11-25 17:37:54,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:54,997 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:37:54,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:37:54,998 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:37:54,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-25 17:37:55,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:55,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 17:37:55,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:37:55,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:55,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:37:55,114 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:37:55,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [375423881] [2022-11-25 17:37:55,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [375423881] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:37:55,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:37:55,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:37:55,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973275519] [2022-11-25 17:37:55,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:37:55,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:37:55,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:37:55,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:37:55,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:37:55,127 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 395 [2022-11-25 17:37:55,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:55,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:37:55,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 395 [2022-11-25 17:37:55,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:37:55,538 INFO L130 PetriNetUnfolder]: 1378/2257 cut-off events. [2022-11-25 17:37:55,538 INFO L131 PetriNetUnfolder]: For 701/701 co-relation queries the response was YES. [2022-11-25 17:37:55,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5637 conditions, 2257 events. 1378/2257 cut-off events. For 701/701 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11381 event pairs, 601 based on Foata normal form. 12/2001 useless extension candidates. Maximal degree in co-relation 5627. Up to 1957 conditions per place. [2022-11-25 17:37:55,553 INFO L137 encePairwiseOnDemand]: 392/395 looper letters, 69 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2022-11-25 17:37:55,553 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 71 transitions, 389 flow [2022-11-25 17:37:55,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:37:55,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:37:55,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 604 transitions. [2022-11-25 17:37:55,556 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.509704641350211 [2022-11-25 17:37:55,556 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 604 transitions. [2022-11-25 17:37:55,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 604 transitions. [2022-11-25 17:37:55,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:37:55,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 604 transitions. [2022-11-25 17:37:55,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:55,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:55,561 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:55,561 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 178 flow. Second operand 3 states and 604 transitions. [2022-11-25 17:37:55,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 71 transitions, 389 flow [2022-11-25 17:37:55,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 71 transitions, 381 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:37:55,590 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 180 flow [2022-11-25 17:37:55,590 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2022-11-25 17:37:55,591 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 3 predicate places. [2022-11-25 17:37:55,591 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 180 flow [2022-11-25 17:37:55,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:37:55,592 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:37:55,592 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:37:55,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-25 17:37:55,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:37:55,808 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:37:55,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:37:55,809 INFO L85 PathProgramCache]: Analyzing trace with hash 131580654, now seen corresponding path program 1 times [2022-11-25 17:37:55,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:37:55,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1792231876] [2022-11-25 17:37:55,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:37:55,809 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:37:55,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:37:55,813 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:37:55,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-25 17:37:55,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:37:55,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 17:37:55,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:37:55,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:37:55,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:37:56,011 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:37:56,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2022-11-25 17:37:56,057 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2022-11-25 17:37:56,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 38 [2022-11-25 17:37:56,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:56,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:37:56,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:37:56,963 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:37:56,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1792231876] [2022-11-25 17:37:56,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1792231876] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:37:56,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:37:56,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-25 17:37:56,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408894488] [2022-11-25 17:37:56,964 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:37:56,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:37:56,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:37:56,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:37:56,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:38:00,980 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 395 [2022-11-25 17:38:00,983 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 180 flow. Second operand has 12 states, 12 states have (on average 173.33333333333334) internal successors, (2080), 12 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:00,983 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:38:00,983 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 395 [2022-11-25 17:38:00,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:38:06,022 INFO L130 PetriNetUnfolder]: 3320/5435 cut-off events. [2022-11-25 17:38:06,022 INFO L131 PetriNetUnfolder]: For 2008/2008 co-relation queries the response was YES. [2022-11-25 17:38:06,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13862 conditions, 5435 events. 3320/5435 cut-off events. For 2008/2008 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 29765 event pairs, 609 based on Foata normal form. 104/4899 useless extension candidates. Maximal degree in co-relation 13851. Up to 2118 conditions per place. [2022-11-25 17:38:06,131 INFO L137 encePairwiseOnDemand]: 386/395 looper letters, 223 selfloop transitions, 23 changer transitions 0/246 dead transitions. [2022-11-25 17:38:06,131 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 246 transitions, 1272 flow [2022-11-25 17:38:06,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 17:38:06,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 17:38:06,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2622 transitions. [2022-11-25 17:38:06,149 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4741410488245931 [2022-11-25 17:38:06,149 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2622 transitions. [2022-11-25 17:38:06,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2622 transitions. [2022-11-25 17:38:06,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:38:06,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2622 transitions. [2022-11-25 17:38:06,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 187.28571428571428) internal successors, (2622), 14 states have internal predecessors, (2622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:06,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 395.0) internal successors, (5925), 15 states have internal predecessors, (5925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:06,178 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 395.0) internal successors, (5925), 15 states have internal predecessors, (5925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:06,179 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 180 flow. Second operand 14 states and 2622 transitions. [2022-11-25 17:38:06,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 246 transitions, 1272 flow [2022-11-25 17:38:06,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 246 transitions, 1269 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:38:06,189 INFO L231 Difference]: Finished difference. Result has 71 places, 67 transitions, 362 flow [2022-11-25 17:38:06,190 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=362, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2022-11-25 17:38:06,191 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 23 predicate places. [2022-11-25 17:38:06,191 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 362 flow [2022-11-25 17:38:06,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 173.33333333333334) internal successors, (2080), 12 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:06,192 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:06,192 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:38:06,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-25 17:38:06,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:38:06,405 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:38:06,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:06,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1761076724, now seen corresponding path program 1 times [2022-11-25 17:38:06,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:38:06,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1209064171] [2022-11-25 17:38:06,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:38:06,406 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:38:06,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:38:06,407 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:38:06,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-25 17:38:06,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:38:06,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:38:06,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:38:06,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-11-25 17:38:06,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:38:06,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:38:06,536 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:38:06,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1209064171] [2022-11-25 17:38:06,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1209064171] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:38:06,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:38:06,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:38:06,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678328402] [2022-11-25 17:38:06,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:38:06,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:38:06,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:38:06,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:38:06,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:38:06,566 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 395 [2022-11-25 17:38:06,567 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 362 flow. Second operand has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:06,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:38:06,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 395 [2022-11-25 17:38:06,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:38:06,868 INFO L130 PetriNetUnfolder]: 934/1739 cut-off events. [2022-11-25 17:38:06,868 INFO L131 PetriNetUnfolder]: For 1834/1834 co-relation queries the response was YES. [2022-11-25 17:38:06,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4901 conditions, 1739 events. 934/1739 cut-off events. For 1834/1834 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 8733 event pairs, 157 based on Foata normal form. 216/1861 useless extension candidates. Maximal degree in co-relation 4882. Up to 1381 conditions per place. [2022-11-25 17:38:06,877 INFO L137 encePairwiseOnDemand]: 389/395 looper letters, 55 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2022-11-25 17:38:06,877 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 65 transitions, 443 flow [2022-11-25 17:38:06,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:38:06,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:38:06,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 583 transitions. [2022-11-25 17:38:06,880 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4919831223628692 [2022-11-25 17:38:06,880 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 583 transitions. [2022-11-25 17:38:06,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 583 transitions. [2022-11-25 17:38:06,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:38:06,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 583 transitions. [2022-11-25 17:38:06,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:06,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:06,885 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:06,885 INFO L175 Difference]: Start difference. First operand has 71 places, 67 transitions, 362 flow. Second operand 3 states and 583 transitions. [2022-11-25 17:38:06,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 65 transitions, 443 flow [2022-11-25 17:38:06,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 65 transitions, 415 flow, removed 10 selfloop flow, removed 6 redundant places. [2022-11-25 17:38:06,894 INFO L231 Difference]: Finished difference. Result has 64 places, 56 transitions, 281 flow [2022-11-25 17:38:06,894 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=281, PETRI_PLACES=64, PETRI_TRANSITIONS=56} [2022-11-25 17:38:06,895 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 16 predicate places. [2022-11-25 17:38:06,895 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 56 transitions, 281 flow [2022-11-25 17:38:06,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:06,896 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:06,896 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:38:06,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-25 17:38:07,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:38:07,109 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:38:07,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:07,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1911203831, now seen corresponding path program 1 times [2022-11-25 17:38:07,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:38:07,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [609387731] [2022-11-25 17:38:07,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:38:07,111 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:38:07,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:38:07,112 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:38:07,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-25 17:38:07,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:38:07,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:38:07,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:38:07,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:38:07,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:38:07,310 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:38:07,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [609387731] [2022-11-25 17:38:07,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [609387731] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:38:07,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:38:07,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:38:07,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851479441] [2022-11-25 17:38:07,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:38:07,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:38:07,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:38:07,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:38:07,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:38:07,691 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 395 [2022-11-25 17:38:07,692 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 56 transitions, 281 flow. Second operand has 6 states, 6 states have (on average 176.16666666666666) internal successors, (1057), 6 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:07,692 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:38:07,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 395 [2022-11-25 17:38:07,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:38:08,205 INFO L130 PetriNetUnfolder]: 1076/1995 cut-off events. [2022-11-25 17:38:08,206 INFO L131 PetriNetUnfolder]: For 1119/1119 co-relation queries the response was YES. [2022-11-25 17:38:08,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5714 conditions, 1995 events. 1076/1995 cut-off events. For 1119/1119 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 9729 event pairs, 205 based on Foata normal form. 0/1989 useless extension candidates. Maximal degree in co-relation 5697. Up to 1066 conditions per place. [2022-11-25 17:38:08,217 INFO L137 encePairwiseOnDemand]: 388/395 looper letters, 87 selfloop transitions, 7 changer transitions 1/95 dead transitions. [2022-11-25 17:38:08,217 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 95 transitions, 637 flow [2022-11-25 17:38:08,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:38:08,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:38:08,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1286 transitions. [2022-11-25 17:38:08,222 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4650994575045208 [2022-11-25 17:38:08,222 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1286 transitions. [2022-11-25 17:38:08,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1286 transitions. [2022-11-25 17:38:08,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:38:08,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1286 transitions. [2022-11-25 17:38:08,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 183.71428571428572) internal successors, (1286), 7 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:08,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 395.0) internal successors, (3160), 8 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:08,232 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 395.0) internal successors, (3160), 8 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:08,232 INFO L175 Difference]: Start difference. First operand has 64 places, 56 transitions, 281 flow. Second operand 7 states and 1286 transitions. [2022-11-25 17:38:08,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 95 transitions, 637 flow [2022-11-25 17:38:08,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 95 transitions, 618 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:38:08,238 INFO L231 Difference]: Finished difference. Result has 69 places, 58 transitions, 307 flow [2022-11-25 17:38:08,239 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=307, PETRI_PLACES=69, PETRI_TRANSITIONS=58} [2022-11-25 17:38:08,239 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 21 predicate places. [2022-11-25 17:38:08,239 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 58 transitions, 307 flow [2022-11-25 17:38:08,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 176.16666666666666) internal successors, (1057), 6 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:08,241 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:08,241 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:38:08,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-25 17:38:08,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:38:08,453 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:38:08,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:08,453 INFO L85 PathProgramCache]: Analyzing trace with hash -297405494, now seen corresponding path program 1 times [2022-11-25 17:38:08,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:38:08,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2087950811] [2022-11-25 17:38:08,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:38:08,454 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:38:08,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:38:08,455 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:38:08,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-25 17:38:08,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:38:08,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 17:38:08,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:38:09,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:38:09,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:38:09,015 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:38:09,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2087950811] [2022-11-25 17:38:09,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2087950811] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:38:09,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:38:09,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-25 17:38:09,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486695844] [2022-11-25 17:38:09,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:38:09,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:38:09,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:38:09,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:38:09,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:38:11,688 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 395 [2022-11-25 17:38:11,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 58 transitions, 307 flow. Second operand has 12 states, 12 states have (on average 166.58333333333334) internal successors, (1999), 12 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:11,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:38:11,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 395 [2022-11-25 17:38:11,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:38:13,949 INFO L130 PetriNetUnfolder]: 1432/2677 cut-off events. [2022-11-25 17:38:13,950 INFO L131 PetriNetUnfolder]: For 1816/1816 co-relation queries the response was YES. [2022-11-25 17:38:13,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7429 conditions, 2677 events. 1432/2677 cut-off events. For 1816/1816 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 14154 event pairs, 375 based on Foata normal form. 44/2685 useless extension candidates. Maximal degree in co-relation 7410. Up to 1568 conditions per place. [2022-11-25 17:38:13,964 INFO L137 encePairwiseOnDemand]: 381/395 looper letters, 145 selfloop transitions, 20 changer transitions 1/166 dead transitions. [2022-11-25 17:38:13,964 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 166 transitions, 1007 flow [2022-11-25 17:38:13,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 17:38:13,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-25 17:38:13,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2628 transitions. [2022-11-25 17:38:13,972 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44354430379746834 [2022-11-25 17:38:13,972 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2628 transitions. [2022-11-25 17:38:13,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2628 transitions. [2022-11-25 17:38:13,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:38:13,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2628 transitions. [2022-11-25 17:38:13,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 175.2) internal successors, (2628), 15 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:13,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 395.0) internal successors, (6320), 16 states have internal predecessors, (6320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:13,991 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 395.0) internal successors, (6320), 16 states have internal predecessors, (6320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:13,991 INFO L175 Difference]: Start difference. First operand has 69 places, 58 transitions, 307 flow. Second operand 15 states and 2628 transitions. [2022-11-25 17:38:13,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 166 transitions, 1007 flow [2022-11-25 17:38:13,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 166 transitions, 1002 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 17:38:13,998 INFO L231 Difference]: Finished difference. Result has 90 places, 71 transitions, 477 flow [2022-11-25 17:38:13,998 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=477, PETRI_PLACES=90, PETRI_TRANSITIONS=71} [2022-11-25 17:38:13,999 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 42 predicate places. [2022-11-25 17:38:13,999 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 71 transitions, 477 flow [2022-11-25 17:38:14,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 166.58333333333334) internal successors, (1999), 12 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:14,000 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:14,000 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:38:14,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-25 17:38:14,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:38:14,213 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:38:14,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:14,213 INFO L85 PathProgramCache]: Analyzing trace with hash 735546854, now seen corresponding path program 1 times [2022-11-25 17:38:14,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:38:14,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [465768861] [2022-11-25 17:38:14,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:38:14,213 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:38:14,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:38:14,214 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:38:14,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-25 17:38:14,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:38:14,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 17:38:14,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:38:14,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:38:14,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:38:14,357 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:38:14,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [465768861] [2022-11-25 17:38:14,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [465768861] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:38:14,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:38:14,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:38:14,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568823322] [2022-11-25 17:38:14,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:38:14,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:38:14,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:38:14,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:38:14,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:38:14,374 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 395 [2022-11-25 17:38:14,375 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 71 transitions, 477 flow. Second operand has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:14,375 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:38:14,375 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 395 [2022-11-25 17:38:14,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:38:14,959 INFO L130 PetriNetUnfolder]: 1685/3172 cut-off events. [2022-11-25 17:38:14,959 INFO L131 PetriNetUnfolder]: For 4114/4114 co-relation queries the response was YES. [2022-11-25 17:38:14,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9973 conditions, 3172 events. 1685/3172 cut-off events. For 4114/4114 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 17894 event pairs, 1154 based on Foata normal form. 84/3202 useless extension candidates. Maximal degree in co-relation 9944. Up to 2640 conditions per place. [2022-11-25 17:38:14,977 INFO L137 encePairwiseOnDemand]: 391/395 looper letters, 115 selfloop transitions, 3 changer transitions 0/118 dead transitions. [2022-11-25 17:38:14,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 118 transitions, 1012 flow [2022-11-25 17:38:14,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:38:14,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:38:14,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 605 transitions. [2022-11-25 17:38:14,980 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.510548523206751 [2022-11-25 17:38:14,980 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 605 transitions. [2022-11-25 17:38:14,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 605 transitions. [2022-11-25 17:38:14,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:38:14,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 605 transitions. [2022-11-25 17:38:14,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:14,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:14,985 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:14,985 INFO L175 Difference]: Start difference. First operand has 90 places, 71 transitions, 477 flow. Second operand 3 states and 605 transitions. [2022-11-25 17:38:14,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 118 transitions, 1012 flow [2022-11-25 17:38:14,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 118 transitions, 977 flow, removed 10 selfloop flow, removed 4 redundant places. [2022-11-25 17:38:15,001 INFO L231 Difference]: Finished difference. Result has 89 places, 73 transitions, 472 flow [2022-11-25 17:38:15,001 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=451, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=472, PETRI_PLACES=89, PETRI_TRANSITIONS=73} [2022-11-25 17:38:15,002 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 41 predicate places. [2022-11-25 17:38:15,002 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 73 transitions, 472 flow [2022-11-25 17:38:15,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:15,002 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:15,002 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:38:15,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-25 17:38:15,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:38:15,215 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:38:15,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:15,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1480451885, now seen corresponding path program 1 times [2022-11-25 17:38:15,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:38:15,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [740882118] [2022-11-25 17:38:15,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:38:15,216 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:38:15,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:38:15,216 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:38:15,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-25 17:38:15,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:38:15,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 17:38:15,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:38:15,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 17:38:15,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 17:38:15,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:38:15,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:38:15,840 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:38:15,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [740882118] [2022-11-25 17:38:15,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [740882118] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:38:15,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:38:15,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-25 17:38:15,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642204286] [2022-11-25 17:38:15,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:38:15,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 17:38:15,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:38:15,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 17:38:15,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:38:18,278 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 395 [2022-11-25 17:38:18,280 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 73 transitions, 472 flow. Second operand has 14 states, 14 states have (on average 156.5) internal successors, (2191), 14 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:18,280 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:38:18,280 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 395 [2022-11-25 17:38:18,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:38:21,219 INFO L130 PetriNetUnfolder]: 2160/4080 cut-off events. [2022-11-25 17:38:21,219 INFO L131 PetriNetUnfolder]: For 4712/4712 co-relation queries the response was YES. [2022-11-25 17:38:21,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13334 conditions, 4080 events. 2160/4080 cut-off events. For 4712/4712 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 24159 event pairs, 678 based on Foata normal form. 12/4092 useless extension candidates. Maximal degree in co-relation 13303. Up to 2899 conditions per place. [2022-11-25 17:38:21,243 INFO L137 encePairwiseOnDemand]: 380/395 looper letters, 168 selfloop transitions, 35 changer transitions 1/204 dead transitions. [2022-11-25 17:38:21,243 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 204 transitions, 1467 flow [2022-11-25 17:38:21,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 17:38:21,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-25 17:38:21,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3419 transitions. [2022-11-25 17:38:21,251 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41217600964436407 [2022-11-25 17:38:21,252 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3419 transitions. [2022-11-25 17:38:21,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3419 transitions. [2022-11-25 17:38:21,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:38:21,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3419 transitions. [2022-11-25 17:38:21,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 162.8095238095238) internal successors, (3419), 21 states have internal predecessors, (3419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:21,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 395.0) internal successors, (8690), 22 states have internal predecessors, (8690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:21,272 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 395.0) internal successors, (8690), 22 states have internal predecessors, (8690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:21,272 INFO L175 Difference]: Start difference. First operand has 89 places, 73 transitions, 472 flow. Second operand 21 states and 3419 transitions. [2022-11-25 17:38:21,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 204 transitions, 1467 flow [2022-11-25 17:38:21,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 204 transitions, 1454 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:38:21,294 INFO L231 Difference]: Finished difference. Result has 119 places, 102 transitions, 789 flow [2022-11-25 17:38:21,294 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=789, PETRI_PLACES=119, PETRI_TRANSITIONS=102} [2022-11-25 17:38:21,296 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 71 predicate places. [2022-11-25 17:38:21,296 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 102 transitions, 789 flow [2022-11-25 17:38:21,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 156.5) internal successors, (2191), 14 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:21,297 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:21,297 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:38:21,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-11-25 17:38:21,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:38:21,509 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:38:21,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:21,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1266699961, now seen corresponding path program 2 times [2022-11-25 17:38:21,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:38:21,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1824342421] [2022-11-25 17:38:21,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:38:21,511 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:38:21,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:38:21,513 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:38:21,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-25 17:38:21,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 17:38:21,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:38:21,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 17:38:21,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:38:21,693 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2022-11-25 17:38:21,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 38 [2022-11-25 17:38:21,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 17:38:22,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 17:38:22,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 17:38:22,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:38:22,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:38:22,386 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:38:22,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1824342421] [2022-11-25 17:38:22,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1824342421] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:38:22,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:38:22,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-25 17:38:22,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283685351] [2022-11-25 17:38:22,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:38:22,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 17:38:22,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:38:22,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 17:38:22,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:38:25,383 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 395 [2022-11-25 17:38:25,385 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 102 transitions, 789 flow. Second operand has 15 states, 15 states have (on average 153.4) internal successors, (2301), 15 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:25,385 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:38:25,385 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 395 [2022-11-25 17:38:25,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:38:27,685 INFO L130 PetriNetUnfolder]: 2653/5014 cut-off events. [2022-11-25 17:38:27,685 INFO L131 PetriNetUnfolder]: For 6949/6949 co-relation queries the response was YES. [2022-11-25 17:38:27,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17297 conditions, 5014 events. 2653/5014 cut-off events. For 6949/6949 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 30095 event pairs, 935 based on Foata normal form. 6/5020 useless extension candidates. Maximal degree in co-relation 17255. Up to 3565 conditions per place. [2022-11-25 17:38:27,742 INFO L137 encePairwiseOnDemand]: 380/395 looper letters, 163 selfloop transitions, 31 changer transitions 1/195 dead transitions. [2022-11-25 17:38:27,743 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 195 transitions, 1622 flow [2022-11-25 17:38:27,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 17:38:27,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 17:38:27,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2105 transitions. [2022-11-25 17:38:27,775 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40993184031158714 [2022-11-25 17:38:27,776 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2105 transitions. [2022-11-25 17:38:27,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2105 transitions. [2022-11-25 17:38:27,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:38:27,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2105 transitions. [2022-11-25 17:38:27,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 161.92307692307693) internal successors, (2105), 13 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:27,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 395.0) internal successors, (5530), 14 states have internal predecessors, (5530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:27,793 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 395.0) internal successors, (5530), 14 states have internal predecessors, (5530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:27,794 INFO L175 Difference]: Start difference. First operand has 119 places, 102 transitions, 789 flow. Second operand 13 states and 2105 transitions. [2022-11-25 17:38:27,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 195 transitions, 1622 flow [2022-11-25 17:38:27,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 195 transitions, 1595 flow, removed 6 selfloop flow, removed 4 redundant places. [2022-11-25 17:38:27,838 INFO L231 Difference]: Finished difference. Result has 133 places, 115 transitions, 989 flow [2022-11-25 17:38:27,839 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=989, PETRI_PLACES=133, PETRI_TRANSITIONS=115} [2022-11-25 17:38:27,839 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 85 predicate places. [2022-11-25 17:38:27,840 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 115 transitions, 989 flow [2022-11-25 17:38:27,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 153.4) internal successors, (2301), 15 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:27,841 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:27,841 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:38:27,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-11-25 17:38:28,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:38:28,053 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:38:28,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:28,054 INFO L85 PathProgramCache]: Analyzing trace with hash -210539393, now seen corresponding path program 3 times [2022-11-25 17:38:28,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:38:28,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1937516576] [2022-11-25 17:38:28,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:38:28,055 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:38:28,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:38:28,056 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:38:28,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-25 17:38:28,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-25 17:38:28,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:38:28,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-25 17:38:28,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:38:28,228 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-11-25 17:38:28,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2022-11-25 17:38:28,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 17:38:28,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 17:38:28,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 17:38:28,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:38:28,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:38:28,917 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:38:28,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1937516576] [2022-11-25 17:38:28,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1937516576] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:38:28,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:38:28,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-25 17:38:28,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643170912] [2022-11-25 17:38:28,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:38:28,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 17:38:28,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:38:28,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 17:38:28,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:38:31,944 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 395 [2022-11-25 17:38:31,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 115 transitions, 989 flow. Second operand has 15 states, 15 states have (on average 153.4) internal successors, (2301), 15 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:31,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:38:31,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 395 [2022-11-25 17:38:31,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:38:34,962 INFO L130 PetriNetUnfolder]: 2641/4990 cut-off events. [2022-11-25 17:38:34,962 INFO L131 PetriNetUnfolder]: For 7589/7589 co-relation queries the response was YES. [2022-11-25 17:38:34,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17778 conditions, 4990 events. 2641/4990 cut-off events. For 7589/7589 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 29776 event pairs, 609 based on Foata normal form. 12/5002 useless extension candidates. Maximal degree in co-relation 17730. Up to 2001 conditions per place. [2022-11-25 17:38:34,989 INFO L137 encePairwiseOnDemand]: 380/395 looper letters, 151 selfloop transitions, 63 changer transitions 1/215 dead transitions. [2022-11-25 17:38:34,990 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 215 transitions, 1839 flow [2022-11-25 17:38:34,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 17:38:34,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-25 17:38:34,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3193 transitions. [2022-11-25 17:38:34,995 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40417721518987343 [2022-11-25 17:38:34,995 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3193 transitions. [2022-11-25 17:38:34,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3193 transitions. [2022-11-25 17:38:34,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:38:34,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3193 transitions. [2022-11-25 17:38:35,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 159.65) internal successors, (3193), 20 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:35,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 395.0) internal successors, (8295), 21 states have internal predecessors, (8295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:35,012 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 395.0) internal successors, (8295), 21 states have internal predecessors, (8295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:35,012 INFO L175 Difference]: Start difference. First operand has 133 places, 115 transitions, 989 flow. Second operand 20 states and 3193 transitions. [2022-11-25 17:38:35,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 215 transitions, 1839 flow [2022-11-25 17:38:35,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 215 transitions, 1806 flow, removed 2 selfloop flow, removed 6 redundant places. [2022-11-25 17:38:35,061 INFO L231 Difference]: Finished difference. Result has 150 places, 124 transitions, 1200 flow [2022-11-25 17:38:35,062 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=956, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1200, PETRI_PLACES=150, PETRI_TRANSITIONS=124} [2022-11-25 17:38:35,062 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 102 predicate places. [2022-11-25 17:38:35,062 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 124 transitions, 1200 flow [2022-11-25 17:38:35,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 153.4) internal successors, (2301), 15 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:35,063 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:35,063 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-25 17:38:35,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-11-25 17:38:35,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:38:35,264 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:38:35,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:35,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1534086062, now seen corresponding path program 1 times [2022-11-25 17:38:35,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:38:35,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [164627006] [2022-11-25 17:38:35,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:38:35,265 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:38:35,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:38:35,266 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:38:35,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-25 17:38:35,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:38:35,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:38:35,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:38:35,442 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:38:35,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:38:35,524 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:38:35,524 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:38:35,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [164627006] [2022-11-25 17:38:35,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [164627006] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:38:35,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:38:35,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-11-25 17:38:35,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514905109] [2022-11-25 17:38:35,525 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:38:35,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:38:35,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:38:35,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:38:35,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:38:35,606 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 395 [2022-11-25 17:38:35,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 124 transitions, 1200 flow. Second operand has 12 states, 12 states have (on average 179.58333333333334) internal successors, (2155), 12 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:35,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:38:35,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 395 [2022-11-25 17:38:35,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:38:37,798 INFO L130 PetriNetUnfolder]: 3939/7404 cut-off events. [2022-11-25 17:38:37,798 INFO L131 PetriNetUnfolder]: For 14544/14544 co-relation queries the response was YES. [2022-11-25 17:38:37,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27178 conditions, 7404 events. 3939/7404 cut-off events. For 14544/14544 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 44781 event pairs, 1225 based on Foata normal form. 98/7502 useless extension candidates. Maximal degree in co-relation 27126. Up to 1623 conditions per place. [2022-11-25 17:38:37,883 INFO L137 encePairwiseOnDemand]: 388/395 looper letters, 293 selfloop transitions, 51 changer transitions 0/344 dead transitions. [2022-11-25 17:38:37,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 344 transitions, 3228 flow [2022-11-25 17:38:37,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 17:38:37,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 17:38:37,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2683 transitions. [2022-11-25 17:38:37,889 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4851717902350814 [2022-11-25 17:38:37,889 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2683 transitions. [2022-11-25 17:38:37,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2683 transitions. [2022-11-25 17:38:37,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:38:37,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2683 transitions. [2022-11-25 17:38:37,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 191.64285714285714) internal successors, (2683), 14 states have internal predecessors, (2683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:37,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 395.0) internal successors, (5925), 15 states have internal predecessors, (5925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:37,900 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 395.0) internal successors, (5925), 15 states have internal predecessors, (5925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:37,901 INFO L175 Difference]: Start difference. First operand has 150 places, 124 transitions, 1200 flow. Second operand 14 states and 2683 transitions. [2022-11-25 17:38:37,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 344 transitions, 3228 flow [2022-11-25 17:38:37,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 344 transitions, 3057 flow, removed 29 selfloop flow, removed 13 redundant places. [2022-11-25 17:38:37,975 INFO L231 Difference]: Finished difference. Result has 157 places, 153 transitions, 1576 flow [2022-11-25 17:38:37,975 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=1090, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1576, PETRI_PLACES=157, PETRI_TRANSITIONS=153} [2022-11-25 17:38:37,976 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 109 predicate places. [2022-11-25 17:38:37,976 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 153 transitions, 1576 flow [2022-11-25 17:38:37,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 179.58333333333334) internal successors, (2155), 12 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:37,977 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:37,977 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:38:37,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-25 17:38:38,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:38:38,189 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:38:38,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:38,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1523557052, now seen corresponding path program 1 times [2022-11-25 17:38:38,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:38:38,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [13849680] [2022-11-25 17:38:38,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:38:38,191 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:38:38,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:38:38,193 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:38:38,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-25 17:38:38,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:38:38,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:38:38,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:38:38,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:38:38,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:38:38,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:38:38,394 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:38:38,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [13849680] [2022-11-25 17:38:38,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [13849680] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:38:38,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:38:38,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-11-25 17:38:38,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730450705] [2022-11-25 17:38:38,396 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:38:38,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:38:38,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:38:38,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:38:38,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:38:38,412 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 395 [2022-11-25 17:38:38,414 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 153 transitions, 1576 flow. Second operand has 6 states, 6 states have (on average 184.33333333333334) internal successors, (1106), 6 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:38,414 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:38:38,414 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 395 [2022-11-25 17:38:38,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:38:41,509 INFO L130 PetriNetUnfolder]: 7523/14364 cut-off events. [2022-11-25 17:38:41,509 INFO L131 PetriNetUnfolder]: For 36424/36424 co-relation queries the response was YES. [2022-11-25 17:38:41,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53534 conditions, 14364 events. 7523/14364 cut-off events. For 36424/36424 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 102914 event pairs, 2485 based on Foata normal form. 2162/16526 useless extension candidates. Maximal degree in co-relation 53476. Up to 4386 conditions per place. [2022-11-25 17:38:41,728 INFO L137 encePairwiseOnDemand]: 389/395 looper letters, 496 selfloop transitions, 24 changer transitions 0/520 dead transitions. [2022-11-25 17:38:41,728 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 520 transitions, 6378 flow [2022-11-25 17:38:41,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:38:41,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:38:41,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1215 transitions. [2022-11-25 17:38:41,731 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5126582278481012 [2022-11-25 17:38:41,731 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1215 transitions. [2022-11-25 17:38:41,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1215 transitions. [2022-11-25 17:38:41,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:38:41,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1215 transitions. [2022-11-25 17:38:41,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 202.5) internal successors, (1215), 6 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:41,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 395.0) internal successors, (2765), 7 states have internal predecessors, (2765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:41,736 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 395.0) internal successors, (2765), 7 states have internal predecessors, (2765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:41,736 INFO L175 Difference]: Start difference. First operand has 157 places, 153 transitions, 1576 flow. Second operand 6 states and 1215 transitions. [2022-11-25 17:38:41,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 520 transitions, 6378 flow [2022-11-25 17:38:41,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 520 transitions, 6118 flow, removed 130 selfloop flow, removed 0 redundant places. [2022-11-25 17:38:41,909 INFO L231 Difference]: Finished difference. Result has 166 places, 166 transitions, 1743 flow [2022-11-25 17:38:41,909 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=1518, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1743, PETRI_PLACES=166, PETRI_TRANSITIONS=166} [2022-11-25 17:38:41,910 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 118 predicate places. [2022-11-25 17:38:41,910 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 166 transitions, 1743 flow [2022-11-25 17:38:41,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 184.33333333333334) internal successors, (1106), 6 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:38:42,023 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:38:42,023 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:38:42,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-25 17:38:42,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:38:42,224 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 17:38:42,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:38:42,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1669988177, now seen corresponding path program 1 times [2022-11-25 17:38:42,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:38:42,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1005890065] [2022-11-25 17:38:42,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:38:42,225 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:38:42,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:38:42,226 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:38:42,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-25 17:38:42,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:38:42,364 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:38:42,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:38:42,498 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2022-11-25 17:38:42,498 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:38:42,499 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (22 of 23 remaining) [2022-11-25 17:38:42,501 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 23 remaining) [2022-11-25 17:38:42,501 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2022-11-25 17:38:42,501 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2022-11-25 17:38:42,502 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2022-11-25 17:38:42,502 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 23 remaining) [2022-11-25 17:38:42,502 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2022-11-25 17:38:42,502 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2022-11-25 17:38:42,502 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2022-11-25 17:38:42,502 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (13 of 23 remaining) [2022-11-25 17:38:42,503 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 23 remaining) [2022-11-25 17:38:42,503 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 23 remaining) [2022-11-25 17:38:42,503 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 23 remaining) [2022-11-25 17:38:42,503 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 23 remaining) [2022-11-25 17:38:42,503 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (8 of 23 remaining) [2022-11-25 17:38:42,504 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (7 of 23 remaining) [2022-11-25 17:38:42,504 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 23 remaining) [2022-11-25 17:38:42,504 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 23 remaining) [2022-11-25 17:38:42,504 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 23 remaining) [2022-11-25 17:38:42,504 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 23 remaining) [2022-11-25 17:38:42,504 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (2 of 23 remaining) [2022-11-25 17:38:42,505 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 23 remaining) [2022-11-25 17:38:42,505 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 23 remaining) [2022-11-25 17:38:42,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-25 17:38:42,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:38:42,718 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:38:42,723 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-11-25 17:38:42,723 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-25 17:38:42,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 05:38:42 BasicIcfg [2022-11-25 17:38:42,765 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-25 17:38:42,766 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-25 17:38:42,766 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-25 17:38:42,766 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-25 17:38:42,767 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:37:30" (3/4) ... [2022-11-25 17:38:42,770 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-25 17:38:42,770 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-25 17:38:42,771 INFO L158 Benchmark]: Toolchain (without parser) took 74204.62ms. Allocated memory was 65.0MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 34.2MB in the beginning and 776.3MB in the end (delta: -742.0MB). Peak memory consumption was 384.6MB. Max. memory is 16.1GB. [2022-11-25 17:38:42,771 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 65.0MB. Free memory was 43.4MB in the beginning and 43.4MB in the end (delta: 45.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 17:38:42,771 INFO L158 Benchmark]: CACSL2BoogieTranslator took 925.72ms. Allocated memory was 65.0MB in the beginning and 81.8MB in the end (delta: 16.8MB). Free memory was 34.1MB in the beginning and 58.7MB in the end (delta: -24.6MB). Peak memory consumption was 17.5MB. Max. memory is 16.1GB. [2022-11-25 17:38:42,772 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.22ms. Allocated memory is still 81.8MB. Free memory was 58.7MB in the beginning and 55.6MB in the end (delta: 3.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-25 17:38:42,772 INFO L158 Benchmark]: Boogie Preprocessor took 39.95ms. Allocated memory is still 81.8MB. Free memory was 55.6MB in the beginning and 53.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 17:38:42,772 INFO L158 Benchmark]: RCFGBuilder took 765.27ms. Allocated memory is still 81.8MB. Free memory was 53.5MB in the beginning and 53.9MB in the end (delta: -397.1kB). Peak memory consumption was 21.8MB. Max. memory is 16.1GB. [2022-11-25 17:38:42,773 INFO L158 Benchmark]: TraceAbstraction took 72400.76ms. Allocated memory was 81.8MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 53.5MB in the beginning and 776.3MB in the end (delta: -722.7MB). Peak memory consumption was 387.3MB. Max. memory is 16.1GB. [2022-11-25 17:38:42,773 INFO L158 Benchmark]: Witness Printer took 4.04ms. Allocated memory is still 1.2GB. Free memory is still 776.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 17:38:42,775 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 65.0MB. Free memory was 43.4MB in the beginning and 43.4MB in the end (delta: 45.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 925.72ms. Allocated memory was 65.0MB in the beginning and 81.8MB in the end (delta: 16.8MB). Free memory was 34.1MB in the beginning and 58.7MB in the end (delta: -24.6MB). Peak memory consumption was 17.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 57.22ms. Allocated memory is still 81.8MB. Free memory was 58.7MB in the beginning and 55.6MB in the end (delta: 3.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.95ms. Allocated memory is still 81.8MB. Free memory was 55.6MB in the beginning and 53.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 765.27ms. Allocated memory is still 81.8MB. Free memory was 53.5MB in the beginning and 53.9MB in the end (delta: -397.1kB). Peak memory consumption was 21.8MB. Max. memory is 16.1GB. * TraceAbstraction took 72400.76ms. Allocated memory was 81.8MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 53.5MB in the beginning and 776.3MB in the end (delta: -722.7MB). Peak memory consumption was 387.3MB. Max. memory is 16.1GB. * Witness Printer took 4.04ms. Allocated memory is still 1.2GB. Free memory is still 776.3MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 13.6s, 185 PlacesBefore, 48 PlacesAfterwards, 188 TransitionsBefore, 47 TransitionsAfterwards, 10398 CoEnabledTransitionPairs, 7 FixpointIterations, 49 TrivialSequentialCompositions, 123 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 24 ConcurrentYvCompositions, 4 ChoiceCompositions, 200 TotalNumberOfCompositions, 15873 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 12831, independent: 12607, independent conditional: 0, independent unconditional: 12607, dependent: 224, dependent conditional: 0, dependent unconditional: 224, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 7512, independent: 7443, independent conditional: 0, independent unconditional: 7443, dependent: 69, dependent conditional: 0, dependent unconditional: 69, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 7512, independent: 7411, independent conditional: 0, independent unconditional: 7411, dependent: 101, dependent conditional: 0, dependent unconditional: 101, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 101, independent: 32, independent conditional: 0, independent unconditional: 32, dependent: 69, dependent conditional: 0, dependent unconditional: 69, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 440, independent: 54, independent conditional: 0, independent unconditional: 54, dependent: 386, dependent conditional: 0, dependent unconditional: 386, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 12831, independent: 5164, independent conditional: 0, independent unconditional: 5164, dependent: 155, dependent conditional: 0, dependent unconditional: 155, unknown: 7512, unknown conditional: 0, unknown unconditional: 7512] , Statistics on independence cache: Total cache size (in pairs): 479, Positive cache size: 452, Positive conditional cache size: 0, Positive unconditional cache size: 452, Negative cache size: 27, Negative conditional cache size: 0, Negative unconditional cache size: 27, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - UnprovableResult [Line: 941]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 941. Possible FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(5)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1021] 0 pthread_t id1, id2; [L1023] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={5:0}, id2={7:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=0, top=0] [L990] 1 int i; [L991] 1 unsigned int tmp; [L992] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1024] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={5:0}, id2={7:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=1, top=0] [L992] COND TRUE 1 i<(5) [L995] 1 tmp = __VERIFIER_nondet_uint() [L996] CALL 1 assume_abort_if_not(tmp < (5)) [L23] COND FALSE 1 !(!cond) [L996] RET 1 assume_abort_if_not(tmp < (5)) [L997] CALL, EXPR 1 push(arr,tmp) [L962] COND FALSE 1 !(top==(5)) [L969] CALL, EXPR 1 get_top() [L954] 1 return top; [L969] RET, EXPR 1 get_top() [L969] 1 stack[get_top()] = x [L970] CALL 1 inc_top() [L946] 1 top++ [L970] RET 1 inc_top() [L972] 1 return 0; [L997] RET, EXPR 1 push(arr,tmp) [L997] COND FALSE 1 !(push(arr,tmp)==(-1)) [L999] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=0, top=1] [L992] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=0, top=1] [L1006] 2 int i; [L1007] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, top=1] [L1007] COND TRUE 2 i<(5) [L1010] COND TRUE 2 \read(flag) [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; [L976] RET, EXPR 2 get_top() [L976] COND FALSE 2 !(get_top()==0) [L983] CALL 2 dec_top() [L950] 2 top-- [L983] RET 2 dec_top() [L984] CALL, EXPR 2 get_top() [L954] 2 return top; [L984] RET, EXPR 2 get_top() [L984] EXPR 2 stack[get_top()] [L984] 2 return stack[get_top()]; [L1012] RET, EXPR 2 pop(arr) [L1012] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1007] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1007] COND TRUE 2 i<(5) [L1010] COND TRUE 2 \read(flag) [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; [L976] RET, EXPR 2 get_top() [L976] COND TRUE 2 get_top()==0 [L979] 2 return (-2); [L1012] RET, EXPR 2 pop(arr) [L1012] COND TRUE 2 !(pop(arr)!=(-2)) [L1013] CALL 2 error() [L941] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1019]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1024]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1023]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 941]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 303 locations, 23 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 72.1s, OverallIterations: 22, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 45.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 13.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5123 SdHoareTripleChecker+Valid, 30.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4295 mSDsluCounter, 5029 SdHoareTripleChecker+Invalid, 26.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4813 mSDsCounter, 211 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 19406 IncrementalHoareTripleChecker+Invalid, 19617 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 211 mSolverCounterUnsat, 216 mSDtfsCounter, 19406 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 377 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 5.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1743occurred in iteration=21, InterpolantAutomatonStates: 152, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 4.7s InterpolantComputationTime, 289 NumberOfCodeBlocks, 289 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 300 ConstructedInterpolants, 5 QuantifiedInterpolants, 2404 SizeOfPredicates, 112 NumberOfNonLiveVariables, 2137 ConjunctsInSsa, 208 ConjunctsInUnsatCore, 24 InterpolantComputations, 18 PerfectInterpolantSequences, 7/39 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-25 17:38:42,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27469967-5654-4a0a-b30c-5c2668fab2e6/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample