./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_79-equ_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102d172e-99ed-4f25-8412-36e2fa132bbe/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102d172e-99ed-4f25-8412-36e2fa132bbe/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102d172e-99ed-4f25-8412-36e2fa132bbe/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102d172e-99ed-4f25-8412-36e2fa132bbe/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_79-equ_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102d172e-99ed-4f25-8412-36e2fa132bbe/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102d172e-99ed-4f25-8412-36e2fa132bbe/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --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 5ac72ff2379990464c5f55660be1e08b12557a61aceeef8401296ef66be035fc --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:57:16,800 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:57:16,871 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102d172e-99ed-4f25-8412-36e2fa132bbe/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 07:57:16,877 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:57:16,878 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:57:16,905 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:57:16,906 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:57:16,906 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:57:16,907 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:57:16,907 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:57:16,908 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:57:16,909 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:57:16,909 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:57:16,910 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:57:16,911 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:57:16,911 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:57:16,912 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:57:16,916 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:57:16,917 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:57:16,918 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:57:16,919 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:57:16,920 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:57:16,920 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:57:16,921 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:57:16,921 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:57:16,922 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:57:16,922 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:57:16,923 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:57:16,923 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:57:16,924 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:57:16,925 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:57:16,926 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:57:16,926 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:57:16,926 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:57:16,926 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:57:16,927 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:57:16,927 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:57:16,927 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:57:16,927 INFO L153 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_102d172e-99ed-4f25-8412-36e2fa132bbe/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102d172e-99ed-4f25-8412-36e2fa132bbe/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ac72ff2379990464c5f55660be1e08b12557a61aceeef8401296ef66be035fc [2023-11-19 07:57:17,251 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:57:17,280 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:57:17,284 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:57:17,286 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:57:17,287 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:57:17,288 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102d172e-99ed-4f25-8412-36e2fa132bbe/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/goblint-regression/28-race_reach_79-equ_racefree.i [2023-11-19 07:57:20,683 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:57:21,095 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:57:21,095 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102d172e-99ed-4f25-8412-36e2fa132bbe/sv-benchmarks/c/goblint-regression/28-race_reach_79-equ_racefree.i [2023-11-19 07:57:21,122 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102d172e-99ed-4f25-8412-36e2fa132bbe/bin/uautomizer-verify-uCwYo4JHxu/data/69b2de736/a41b002eaa464f2f9ba2a6d6becc488e/FLAGe4a6bfa22 [2023-11-19 07:57:21,142 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102d172e-99ed-4f25-8412-36e2fa132bbe/bin/uautomizer-verify-uCwYo4JHxu/data/69b2de736/a41b002eaa464f2f9ba2a6d6becc488e [2023-11-19 07:57:21,150 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:57:21,151 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:57:21,154 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:57:21,154 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:57:21,160 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:57:21,161 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:57:21" (1/1) ... [2023-11-19 07:57:21,162 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@865ba49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:21, skipping insertion in model container [2023-11-19 07:57:21,162 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:57:21" (1/1) ... [2023-11-19 07:57:21,231 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:57:21,865 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:57:21,879 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:57:21,938 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:57:22,019 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:57:22,020 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:22 WrapperNode [2023-11-19 07:57:22,020 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:57:22,022 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:57:22,022 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:57:22,022 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:57:22,030 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:22" (1/1) ... [2023-11-19 07:57:22,051 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:22" (1/1) ... [2023-11-19 07:57:22,084 INFO L138 Inliner]: procedures = 271, calls = 57, calls flagged for inlining = 5, calls inlined = 6, statements flattened = 211 [2023-11-19 07:57:22,084 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:57:22,085 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:57:22,085 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:57:22,086 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:57:22,095 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:22" (1/1) ... [2023-11-19 07:57:22,096 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:22" (1/1) ... [2023-11-19 07:57:22,101 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:22" (1/1) ... [2023-11-19 07:57:22,101 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:22" (1/1) ... [2023-11-19 07:57:22,111 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:22" (1/1) ... [2023-11-19 07:57:22,117 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:22" (1/1) ... [2023-11-19 07:57:22,120 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:22" (1/1) ... [2023-11-19 07:57:22,122 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:22" (1/1) ... [2023-11-19 07:57:22,127 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:57:22,128 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:57:22,128 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:57:22,128 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:57:22,129 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:22" (1/1) ... [2023-11-19 07:57:22,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:57:22,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102d172e-99ed-4f25-8412-36e2fa132bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:22,176 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102d172e-99ed-4f25-8412-36e2fa132bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:22,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102d172e-99ed-4f25-8412-36e2fa132bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:57:22,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:57:22,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:57:22,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:57:22,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:57:22,227 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 07:57:22,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:57:22,228 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-19 07:57:22,228 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-19 07:57:22,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:57:22,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:57:22,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:57:22,230 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:57:22,390 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:57:22,393 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:57:22,887 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:57:22,900 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:57:22,900 INFO L302 CfgBuilder]: Removed 22 assume(true) statements. [2023-11-19 07:57:22,906 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:57:22 BoogieIcfgContainer [2023-11-19 07:57:22,906 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:57:22,909 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:57:22,912 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:57:22,916 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:57:22,916 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:57:21" (1/3) ... [2023-11-19 07:57:22,917 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b00c21c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:57:22, skipping insertion in model container [2023-11-19 07:57:22,917 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:22" (2/3) ... [2023-11-19 07:57:22,920 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b00c21c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:57:22, skipping insertion in model container [2023-11-19 07:57:22,921 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:57:22" (3/3) ... [2023-11-19 07:57:22,923 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_79-equ_racefree.i [2023-11-19 07:57:22,945 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:57:22,945 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2023-11-19 07:57:22,945 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:57:23,044 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-19 07:57:23,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 245 transitions, 497 flow [2023-11-19 07:57:23,241 INFO L124 PetriNetUnfolderBase]: 46/342 cut-off events. [2023-11-19 07:57:23,241 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:57:23,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 342 events. 46/342 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1335 event pairs, 0 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 176. Up to 8 conditions per place. [2023-11-19 07:57:23,251 INFO L82 GeneralOperation]: Start removeDead. Operand has 217 places, 245 transitions, 497 flow [2023-11-19 07:57:23,279 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 217 places, 245 transitions, 497 flow [2023-11-19 07:57:23,285 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:57:23,308 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 217 places, 245 transitions, 497 flow [2023-11-19 07:57:23,317 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 217 places, 245 transitions, 497 flow [2023-11-19 07:57:23,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 245 transitions, 497 flow [2023-11-19 07:57:23,407 INFO L124 PetriNetUnfolderBase]: 46/342 cut-off events. [2023-11-19 07:57:23,408 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:57:23,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 342 events. 46/342 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1335 event pairs, 0 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 176. Up to 8 conditions per place. [2023-11-19 07:57:23,422 INFO L119 LiptonReduction]: Number of co-enabled transitions 15244 [2023-11-19 07:57:35,609 INFO L134 LiptonReduction]: Checked pairs total: 38315 [2023-11-19 07:57:35,610 INFO L136 LiptonReduction]: Total number of compositions: 249 [2023-11-19 07:57:35,628 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:57:35,636 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;@7d2427fc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:57:35,636 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2023-11-19 07:57:35,641 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:57:35,641 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-19 07:57:35,641 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:57:35,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:57:35,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:57:35,643 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-19 07:57:35,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:35,649 INFO L85 PathProgramCache]: Analyzing trace with hash 30192, now seen corresponding path program 1 times [2023-11-19 07:57:35,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:35,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107772741] [2023-11-19 07:57:35,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:35,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:35,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:35,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:35,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:35,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107772741] [2023-11-19 07:57:35,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107772741] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:57:35,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:57:35,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:57:35,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459804657] [2023-11-19 07:57:35,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:57:35,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:57:35,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:35,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:57:35,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:57:36,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 494 [2023-11-19 07:57:36,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 94 transitions, 195 flow. Second operand has 3 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:36,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:57:36,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 494 [2023-11-19 07:57:36,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:57:36,437 INFO L124 PetriNetUnfolderBase]: 602/1370 cut-off events. [2023-11-19 07:57:36,437 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:57:36,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2560 conditions, 1370 events. 602/1370 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8966 event pairs, 532 based on Foata normal form. 102/960 useless extension candidates. Maximal degree in co-relation 2480. Up to 1143 conditions per place. [2023-11-19 07:57:36,451 INFO L140 encePairwiseOnDemand]: 463/494 looper letters, 67 selfloop transitions, 1 changer transitions 5/86 dead transitions. [2023-11-19 07:57:36,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 86 transitions, 325 flow [2023-11-19 07:57:36,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:57:36,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:57:36,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 742 transitions. [2023-11-19 07:57:36,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5006747638326585 [2023-11-19 07:57:36,470 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 742 transitions. [2023-11-19 07:57:36,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 742 transitions. [2023-11-19 07:57:36,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:57:36,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 742 transitions. [2023-11-19 07:57:36,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 247.33333333333334) internal successors, (742), 3 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:36,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 494.0) internal successors, (1976), 4 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:36,492 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 494.0) internal successors, (1976), 4 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:36,494 INFO L175 Difference]: Start difference. First operand has 71 places, 94 transitions, 195 flow. Second operand 3 states and 742 transitions. [2023-11-19 07:57:36,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 86 transitions, 325 flow [2023-11-19 07:57:36,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 86 transitions, 325 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:57:36,502 INFO L231 Difference]: Finished difference. Result has 68 places, 65 transitions, 142 flow [2023-11-19 07:57:36,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=494, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2023-11-19 07:57:36,508 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2023-11-19 07:57:36,508 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 142 flow [2023-11-19 07:57:36,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:36,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:57:36,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:57:36,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:57:36,510 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-19 07:57:36,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:36,511 INFO L85 PathProgramCache]: Analyzing trace with hash 30815, now seen corresponding path program 1 times [2023-11-19 07:57:36,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:36,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165491937] [2023-11-19 07:57:36,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:36,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:36,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:36,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:36,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:36,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165491937] [2023-11-19 07:57:36,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165491937] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:57:36,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:57:36,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:57:36,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92165552] [2023-11-19 07:57:36,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:57:36,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:57:36,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:36,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:57:36,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:57:36,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 494 [2023-11-19 07:57:36,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:36,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:57:36,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 494 [2023-11-19 07:57:36,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:57:37,083 INFO L124 PetriNetUnfolderBase]: 540/1253 cut-off events. [2023-11-19 07:57:37,083 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-19 07:57:37,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2365 conditions, 1253 events. 540/1253 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8228 event pairs, 456 based on Foata normal form. 0/831 useless extension candidates. Maximal degree in co-relation 2290. Up to 982 conditions per place. [2023-11-19 07:57:37,096 INFO L140 encePairwiseOnDemand]: 490/494 looper letters, 66 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-11-19 07:57:37,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 82 transitions, 312 flow [2023-11-19 07:57:37,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:57:37,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:57:37,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 688 transitions. [2023-11-19 07:57:37,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642375168690958 [2023-11-19 07:57:37,101 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 688 transitions. [2023-11-19 07:57:37,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 688 transitions. [2023-11-19 07:57:37,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:57:37,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 688 transitions. [2023-11-19 07:57:37,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 229.33333333333334) internal successors, (688), 3 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:37,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 494.0) internal successors, (1976), 4 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:37,111 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 494.0) internal successors, (1976), 4 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:37,112 INFO L175 Difference]: Start difference. First operand has 68 places, 65 transitions, 142 flow. Second operand 3 states and 688 transitions. [2023-11-19 07:57:37,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 82 transitions, 312 flow [2023-11-19 07:57:37,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 82 transitions, 308 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-19 07:57:37,118 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 138 flow [2023-11-19 07:57:37,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=494, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2023-11-19 07:57:37,120 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -5 predicate places. [2023-11-19 07:57:37,120 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 138 flow [2023-11-19 07:57:37,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:37,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:57:37,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:57:37,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:57:37,122 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-19 07:57:37,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:37,123 INFO L85 PathProgramCache]: Analyzing trace with hash 30816, now seen corresponding path program 1 times [2023-11-19 07:57:37,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:37,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883429802] [2023-11-19 07:57:37,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:37,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:37,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:37,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:37,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:37,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883429802] [2023-11-19 07:57:37,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883429802] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:57:37,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:57:37,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:57:37,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072121965] [2023-11-19 07:57:37,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:57:37,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:57:37,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:37,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:57:37,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:57:37,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 494 [2023-11-19 07:57:37,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:37,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:57:37,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 494 [2023-11-19 07:57:37,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:57:37,782 INFO L124 PetriNetUnfolderBase]: 515/1190 cut-off events. [2023-11-19 07:57:37,782 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:57:37,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2282 conditions, 1190 events. 515/1190 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 8130 event pairs, 0 based on Foata normal form. 0/838 useless extension candidates. Maximal degree in co-relation 2233. Up to 1021 conditions per place. [2023-11-19 07:57:37,793 INFO L140 encePairwiseOnDemand]: 490/494 looper letters, 67 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-11-19 07:57:37,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 83 transitions, 316 flow [2023-11-19 07:57:37,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:57:37,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:57:37,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 695 transitions. [2023-11-19 07:57:37,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689608636977058 [2023-11-19 07:57:37,797 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 695 transitions. [2023-11-19 07:57:37,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 695 transitions. [2023-11-19 07:57:37,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:57:37,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 695 transitions. [2023-11-19 07:57:37,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 231.66666666666666) internal successors, (695), 3 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:37,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 494.0) internal successors, (1976), 4 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:37,807 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 494.0) internal successors, (1976), 4 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:37,808 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 138 flow. Second operand 3 states and 695 transitions. [2023-11-19 07:57:37,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 83 transitions, 316 flow [2023-11-19 07:57:37,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 83 transitions, 312 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:57:37,815 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 144 flow [2023-11-19 07:57:37,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=494, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2023-11-19 07:57:37,817 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -4 predicate places. [2023-11-19 07:57:37,821 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 144 flow [2023-11-19 07:57:37,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:37,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:57:37,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:57:37,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:57:37,824 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-19 07:57:37,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:37,824 INFO L85 PathProgramCache]: Analyzing trace with hash 918756922, now seen corresponding path program 1 times [2023-11-19 07:57:37,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:37,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657841673] [2023-11-19 07:57:37,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:37,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:37,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:38,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:38,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:38,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657841673] [2023-11-19 07:57:38,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657841673] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:57:38,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806789154] [2023-11-19 07:57:38,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:38,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:57:38,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102d172e-99ed-4f25-8412-36e2fa132bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:38,096 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102d172e-99ed-4f25-8412-36e2fa132bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:57:38,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102d172e-99ed-4f25-8412-36e2fa132bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:57:38,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:38,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:57:38,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:39,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 612 treesize of output 611 [2023-11-19 07:57:39,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 23 select indices, 23 select index equivalence classes, 35 disjoint index pairs (out of 253 index pairs), introduced 23 new quantified variables, introduced 0 case distinctions, treesize of input 600 treesize of output 416 [2023-11-19 07:57:39,617 INFO L349 Elim1Store]: treesize reduction 70, result has 27.1 percent of original size [2023-11-19 07:57:39,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 416 treesize of output 421 [2023-11-19 07:57:39,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:57:39,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:57:39,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:57:39,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:57:39,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:57:39,847 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-19 07:57:39,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2023-11-19 07:57:39,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:57:39,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:57:39,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:57:39,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:57:39,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:57:39,970 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-19 07:57:39,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2023-11-19 07:57:40,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:40,159 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:57:40,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:40,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806789154] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:57:40,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:57:40,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 3] total 7 [2023-11-19 07:57:40,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126951412] [2023-11-19 07:57:40,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:57:40,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 07:57:40,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:40,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 07:57:40,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:57:40,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 494 [2023-11-19 07:57:40,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 144 flow. Second operand has 9 states, 9 states have (on average 206.66666666666666) internal successors, (1860), 9 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:40,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:57:40,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 494 [2023-11-19 07:57:40,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:57:40,972 INFO L124 PetriNetUnfolderBase]: 39/127 cut-off events. [2023-11-19 07:57:40,972 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-19 07:57:40,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 127 events. 39/127 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 546 event pairs, 0 based on Foata normal form. 20/124 useless extension candidates. Maximal degree in co-relation 241. Up to 78 conditions per place. [2023-11-19 07:57:40,974 INFO L140 encePairwiseOnDemand]: 490/494 looper letters, 41 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2023-11-19 07:57:40,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 51 transitions, 198 flow [2023-11-19 07:57:40,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:57:40,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:57:40,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 865 transitions. [2023-11-19 07:57:40,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43775303643724695 [2023-11-19 07:57:40,979 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 865 transitions. [2023-11-19 07:57:40,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 865 transitions. [2023-11-19 07:57:40,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:57:40,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 865 transitions. [2023-11-19 07:57:40,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 216.25) internal successors, (865), 4 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:40,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 494.0) internal successors, (2470), 5 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:40,992 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 494.0) internal successors, (2470), 5 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:40,993 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 144 flow. Second operand 4 states and 865 transitions. [2023-11-19 07:57:40,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 51 transitions, 198 flow [2023-11-19 07:57:40,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 51 transitions, 192 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 07:57:40,996 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 70 flow [2023-11-19 07:57:40,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=494, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=70, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-11-19 07:57:40,997 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -35 predicate places. [2023-11-19 07:57:40,997 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 70 flow [2023-11-19 07:57:40,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 206.66666666666666) internal successors, (1860), 9 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:41,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:57:41,000 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-19 07:57:41,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102d172e-99ed-4f25-8412-36e2fa132bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:41,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102d172e-99ed-4f25-8412-36e2fa132bbe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:57:41,232 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-19 07:57:41,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:41,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1583305774, now seen corresponding path program 1 times [2023-11-19 07:57:41,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:41,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180760551] [2023-11-19 07:57:41,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:41,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:41,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:57:41,268 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:57:41,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:57:41,319 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:57:41,319 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:57:41,320 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (38 of 39 remaining) [2023-11-19 07:57:41,325 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (37 of 39 remaining) [2023-11-19 07:57:41,326 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 39 remaining) [2023-11-19 07:57:41,326 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 39 remaining) [2023-11-19 07:57:41,326 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 39 remaining) [2023-11-19 07:57:41,326 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 39 remaining) [2023-11-19 07:57:41,327 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 39 remaining) [2023-11-19 07:57:41,327 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 39 remaining) [2023-11-19 07:57:41,327 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 39 remaining) [2023-11-19 07:57:41,328 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 39 remaining) [2023-11-19 07:57:41,328 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 39 remaining) [2023-11-19 07:57:41,331 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 39 remaining) [2023-11-19 07:57:41,331 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 39 remaining) [2023-11-19 07:57:41,331 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 39 remaining) [2023-11-19 07:57:41,332 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 39 remaining) [2023-11-19 07:57:41,332 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 39 remaining) [2023-11-19 07:57:41,332 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (22 of 39 remaining) [2023-11-19 07:57:41,332 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 39 remaining) [2023-11-19 07:57:41,333 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 39 remaining) [2023-11-19 07:57:41,333 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 39 remaining) [2023-11-19 07:57:41,333 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 39 remaining) [2023-11-19 07:57:41,333 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 39 remaining) [2023-11-19 07:57:41,334 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 39 remaining) [2023-11-19 07:57:41,334 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 39 remaining) [2023-11-19 07:57:41,334 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 39 remaining) [2023-11-19 07:57:41,334 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 39 remaining) [2023-11-19 07:57:41,335 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 39 remaining) [2023-11-19 07:57:41,335 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 39 remaining) [2023-11-19 07:57:41,335 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 39 remaining) [2023-11-19 07:57:41,336 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 39 remaining) [2023-11-19 07:57:41,336 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 39 remaining) [2023-11-19 07:57:41,336 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 39 remaining) [2023-11-19 07:57:41,336 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 39 remaining) [2023-11-19 07:57:41,337 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 39 remaining) [2023-11-19 07:57:41,337 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 39 remaining) [2023-11-19 07:57:41,337 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 39 remaining) [2023-11-19 07:57:41,338 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 39 remaining) [2023-11-19 07:57:41,338 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 39 remaining) [2023-11-19 07:57:41,338 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 39 remaining) [2023-11-19 07:57:41,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:57:41,339 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-19 07:57:41,342 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:57:41,342 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-19 07:57:41,396 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:57:41,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 281 places, 321 transitions, 658 flow [2023-11-19 07:57:41,536 INFO L124 PetriNetUnfolderBase]: 77/546 cut-off events. [2023-11-19 07:57:41,536 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 07:57:41,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 558 conditions, 546 events. 77/546 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2507 event pairs, 0 based on Foata normal form. 0/392 useless extension candidates. Maximal degree in co-relation 344. Up to 12 conditions per place. [2023-11-19 07:57:41,545 INFO L82 GeneralOperation]: Start removeDead. Operand has 281 places, 321 transitions, 658 flow [2023-11-19 07:57:41,555 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 281 places, 321 transitions, 658 flow [2023-11-19 07:57:41,555 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:57:41,556 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 281 places, 321 transitions, 658 flow [2023-11-19 07:57:41,556 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 281 places, 321 transitions, 658 flow [2023-11-19 07:57:41,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 281 places, 321 transitions, 658 flow [2023-11-19 07:57:41,652 INFO L124 PetriNetUnfolderBase]: 77/546 cut-off events. [2023-11-19 07:57:41,653 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 07:57:41,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 558 conditions, 546 events. 77/546 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2507 event pairs, 0 based on Foata normal form. 0/392 useless extension candidates. Maximal degree in co-relation 344. Up to 12 conditions per place. [2023-11-19 07:57:41,697 INFO L119 LiptonReduction]: Number of co-enabled transitions 43068 [2023-11-19 07:57:52,179 INFO L134 LiptonReduction]: Checked pairs total: 98245 [2023-11-19 07:57:52,179 INFO L136 LiptonReduction]: Total number of compositions: 305 [2023-11-19 07:57:52,181 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:57:52,182 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;@7d2427fc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:57:52,182 INFO L358 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2023-11-19 07:57:52,185 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:57:52,186 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-19 07:57:52,186 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:57:52,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:57:52,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:57:52,186 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-19 07:57:52,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:52,187 INFO L85 PathProgramCache]: Analyzing trace with hash 53247, now seen corresponding path program 1 times [2023-11-19 07:57:52,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:52,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670959637] [2023-11-19 07:57:52,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:52,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:52,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:52,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:52,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:52,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670959637] [2023-11-19 07:57:52,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670959637] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:57:52,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:57:52,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:57:52,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453822466] [2023-11-19 07:57:52,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:57:52,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:57:52,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:52,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:57:52,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:57:52,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 626 [2023-11-19 07:57:52,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 136 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 269.6666666666667) internal successors, (809), 3 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:52,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:57:52,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 626 [2023-11-19 07:57:52,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:57:57,297 INFO L124 PetriNetUnfolderBase]: 24517/40654 cut-off events. [2023-11-19 07:57:57,298 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2023-11-19 07:57:57,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77234 conditions, 40654 events. 24517/40654 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 1899. Compared 354443 event pairs, 11305 based on Foata normal form. 3334/31531 useless extension candidates. Maximal degree in co-relation 5905. Up to 36445 conditions per place. [2023-11-19 07:57:57,646 INFO L140 encePairwiseOnDemand]: 582/626 looper letters, 95 selfloop transitions, 2 changer transitions 0/119 dead transitions. [2023-11-19 07:57:57,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 119 transitions, 448 flow [2023-11-19 07:57:57,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:57:57,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:57:57,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 959 transitions. [2023-11-19 07:57:57,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5106496272630457 [2023-11-19 07:57:57,652 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 959 transitions. [2023-11-19 07:57:57,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 959 transitions. [2023-11-19 07:57:57,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:57:57,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 959 transitions. [2023-11-19 07:57:57,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 319.6666666666667) internal successors, (959), 3 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:57,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 626.0) internal successors, (2504), 4 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:57,666 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 626.0) internal successors, (2504), 4 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:57,666 INFO L175 Difference]: Start difference. First operand has 103 places, 136 transitions, 288 flow. Second operand 3 states and 959 transitions. [2023-11-19 07:57:57,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 119 transitions, 448 flow [2023-11-19 07:57:57,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 119 transitions, 448 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:57:57,671 INFO L231 Difference]: Finished difference. Result has 98 places, 97 transitions, 222 flow [2023-11-19 07:57:57,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=626, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=98, PETRI_TRANSITIONS=97} [2023-11-19 07:57:57,673 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -5 predicate places. [2023-11-19 07:57:57,673 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 97 transitions, 222 flow [2023-11-19 07:57:57,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 269.6666666666667) internal successors, (809), 3 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:57,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:57:57,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:57:57,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:57:57,675 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-19 07:57:57,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:57,675 INFO L85 PathProgramCache]: Analyzing trace with hash 53246, now seen corresponding path program 1 times [2023-11-19 07:57:57,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:57,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422041821] [2023-11-19 07:57:57,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:57,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:57,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:57,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:57,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:57,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422041821] [2023-11-19 07:57:57,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422041821] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:57:57,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:57:57,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:57:57,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516860350] [2023-11-19 07:57:57,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:57:57,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:57:57,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:57,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:57:57,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:57:57,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 626 [2023-11-19 07:57:57,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 97 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 267.6666666666667) internal successors, (803), 3 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:57,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:57:57,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 626 [2023-11-19 07:57:57,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:01,494 INFO L124 PetriNetUnfolderBase]: 23189/38055 cut-off events. [2023-11-19 07:58:01,494 INFO L125 PetriNetUnfolderBase]: For 1003/1003 co-relation queries the response was YES. [2023-11-19 07:58:01,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73421 conditions, 38055 events. 23189/38055 cut-off events. For 1003/1003 co-relation queries the response was YES. Maximal size of possible extension queue 1818. Compared 326553 event pairs, 20152 based on Foata normal form. 0/27118 useless extension candidates. Maximal degree in co-relation 73270. Up to 31306 conditions per place. [2023-11-19 07:58:01,978 INFO L140 encePairwiseOnDemand]: 622/626 looper letters, 110 selfloop transitions, 2 changer transitions 0/134 dead transitions. [2023-11-19 07:58:01,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 134 transitions, 520 flow [2023-11-19 07:58:01,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:58:01,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:58:01,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 914 transitions. [2023-11-19 07:58:01,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48668796592119273 [2023-11-19 07:58:01,984 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 914 transitions. [2023-11-19 07:58:01,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 914 transitions. [2023-11-19 07:58:01,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:01,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 914 transitions. [2023-11-19 07:58:01,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 304.6666666666667) internal successors, (914), 3 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:01,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 626.0) internal successors, (2504), 4 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:01,997 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 626.0) internal successors, (2504), 4 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:01,998 INFO L175 Difference]: Start difference. First operand has 98 places, 97 transitions, 222 flow. Second operand 3 states and 914 transitions. [2023-11-19 07:58:01,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 134 transitions, 520 flow [2023-11-19 07:58:02,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 134 transitions, 518 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:58:02,008 INFO L231 Difference]: Finished difference. Result has 97 places, 95 transitions, 220 flow [2023-11-19 07:58:02,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=626, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=97, PETRI_TRANSITIONS=95} [2023-11-19 07:58:02,011 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -6 predicate places. [2023-11-19 07:58:02,011 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 95 transitions, 220 flow [2023-11-19 07:58:02,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 267.6666666666667) internal successors, (803), 3 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:02,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:02,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:58:02,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:58:02,012 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-19 07:58:02,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:02,013 INFO L85 PathProgramCache]: Analyzing trace with hash 52834, now seen corresponding path program 1 times [2023-11-19 07:58:02,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:02,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614452792] [2023-11-19 07:58:02,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:02,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:02,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:02,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:02,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:02,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614452792] [2023-11-19 07:58:02,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614452792] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:02,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:02,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:58:02,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125742433] [2023-11-19 07:58:02,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:02,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:58:02,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:02,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:58:02,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:58:02,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 270 out of 626 [2023-11-19 07:58:02,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 95 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 270.6666666666667) internal successors, (812), 3 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:02,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:02,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 270 of 626 [2023-11-19 07:58:02,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:05,959 INFO L124 PetriNetUnfolderBase]: 24105/39052 cut-off events. [2023-11-19 07:58:05,960 INFO L125 PetriNetUnfolderBase]: For 1204/1204 co-relation queries the response was YES. [2023-11-19 07:58:06,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76161 conditions, 39052 events. 24105/39052 cut-off events. For 1204/1204 co-relation queries the response was YES. Maximal size of possible extension queue 1868. Compared 328404 event pairs, 21828 based on Foata normal form. 0/27856 useless extension candidates. Maximal degree in co-relation 67727. Up to 33907 conditions per place. [2023-11-19 07:58:06,243 INFO L140 encePairwiseOnDemand]: 623/626 looper letters, 111 selfloop transitions, 1 changer transitions 2/135 dead transitions. [2023-11-19 07:58:06,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 135 transitions, 528 flow [2023-11-19 07:58:06,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:58:06,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:58:06,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 924 transitions. [2023-11-19 07:58:06,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49201277955271566 [2023-11-19 07:58:06,253 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 924 transitions. [2023-11-19 07:58:06,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 924 transitions. [2023-11-19 07:58:06,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:06,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 924 transitions. [2023-11-19 07:58:06,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 308.0) internal successors, (924), 3 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:06,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 626.0) internal successors, (2504), 4 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:06,265 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 626.0) internal successors, (2504), 4 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:06,265 INFO L175 Difference]: Start difference. First operand has 97 places, 95 transitions, 220 flow. Second operand 3 states and 924 transitions. [2023-11-19 07:58:06,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 135 transitions, 528 flow [2023-11-19 07:58:06,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 135 transitions, 524 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:58:06,319 INFO L231 Difference]: Finished difference. Result has 98 places, 94 transitions, 219 flow [2023-11-19 07:58:06,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=626, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=219, PETRI_PLACES=98, PETRI_TRANSITIONS=94} [2023-11-19 07:58:06,321 INFO L281 CegarLoopForPetriNet]: 103 programPoint places, -5 predicate places. [2023-11-19 07:58:06,321 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 94 transitions, 219 flow [2023-11-19 07:58:06,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 270.6666666666667) internal successors, (812), 3 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:06,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:06,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:58:06,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:58:06,323 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-19 07:58:06,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:06,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1969401821, now seen corresponding path program 1 times [2023-11-19 07:58:06,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:06,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939207547] [2023-11-19 07:58:06,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:06,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:06,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:06,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:06,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:06,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939207547] [2023-11-19 07:58:06,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939207547] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:06,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:06,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:58:06,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139063575] [2023-11-19 07:58:06,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:06,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:58:06,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:06,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:58:06,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:58:06,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 626 [2023-11-19 07:58:06,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 94 transitions, 219 flow. Second operand has 4 states, 4 states have (on average 262.5) internal successors, (1050), 4 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:06,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:06,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 626 [2023-11-19 07:58:06,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand