./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 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_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b699de581afb3d801299d89a35eee78f9e3cb86ad1a23fab537b92eb394c5e62 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 14:55:39,139 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 14:55:39,140 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 14:55:39,158 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 14:55:39,159 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 14:55:39,160 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 14:55:39,161 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 14:55:39,163 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 14:55:39,164 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 14:55:39,165 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 14:55:39,166 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 14:55:39,167 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 14:55:39,167 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 14:55:39,168 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 14:55:39,170 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 14:55:39,171 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 14:55:39,171 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 14:55:39,172 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 14:55:39,174 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 14:55:39,176 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 14:55:39,177 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 14:55:39,178 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 14:55:39,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 14:55:39,180 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 14:55:39,184 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 14:55:39,184 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 14:55:39,184 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 14:55:39,185 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 14:55:39,186 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 14:55:39,187 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 14:55:39,187 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 14:55:39,188 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 14:55:39,188 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 14:55:39,189 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 14:55:39,190 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 14:55:39,190 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 14:55:39,191 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 14:55:39,191 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 14:55:39,191 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 14:55:39,192 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 14:55:39,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 14:55:39,194 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 14:55:39,214 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 14:55:39,214 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 14:55:39,215 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 14:55:39,215 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 14:55:39,216 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 14:55:39,216 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 14:55:39,216 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 14:55:39,217 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 14:55:39,217 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 14:55:39,217 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 14:55:39,217 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 14:55:39,217 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 14:55:39,218 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 14:55:39,218 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 14:55:39,218 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 14:55:39,218 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 14:55:39,218 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 14:55:39,219 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 14:55:39,219 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 14:55:39,219 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 14:55:39,219 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 14:55:39,219 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 14:55:39,220 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 14:55:39,220 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 14:55:39,220 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 14:55:39,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:55:39,220 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 14:55:39,220 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 14:55:39,221 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 14:55:39,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 14:55:39,221 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 14:55:39,221 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 14:55:39,221 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 14:55:39,222 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 14:55:39,222 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b699de581afb3d801299d89a35eee78f9e3cb86ad1a23fab537b92eb394c5e62 [2022-12-13 14:55:39,414 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 14:55:39,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 14:55:39,437 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 14:55:39,439 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 14:55:39,439 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 14:55:39,440 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c [2022-12-13 14:55:42,034 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 14:55:42,151 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 14:55:42,152 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c [2022-12-13 14:55:42,157 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/data/23c8c3f91/4edaa083896e48758db18a255c419b01/FLAGfd3e0fdb0 [2022-12-13 14:55:42,170 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/data/23c8c3f91/4edaa083896e48758db18a255c419b01 [2022-12-13 14:55:42,173 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 14:55:42,175 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 14:55:42,176 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 14:55:42,176 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 14:55:42,179 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 14:55:42,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:55:42" (1/1) ... [2022-12-13 14:55:42,180 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74fe9b65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:55:42, skipping insertion in model container [2022-12-13 14:55:42,180 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:55:42" (1/1) ... [2022-12-13 14:55:42,186 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 14:55:42,202 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 14:55:42,341 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:55:42,342 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:55:42,342 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:55:42,342 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:55:42,346 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:55:42,346 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:55:42,347 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:55:42,347 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:55:42,348 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:55:42,349 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:55:42,349 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:55:42,349 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:55:42,355 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c[2856,2869] [2022-12-13 14:55:42,359 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:55:42,366 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 14:55:42,377 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:55:42,377 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:55:42,378 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:55:42,378 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:55:42,379 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:55:42,380 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:55:42,380 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:55:42,380 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:55:42,381 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:55:42,382 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:55:42,382 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:55:42,382 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:55:42,386 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c[2856,2869] [2022-12-13 14:55:42,387 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:55:42,399 INFO L208 MainTranslator]: Completed translation [2022-12-13 14:55:42,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:55:42 WrapperNode [2022-12-13 14:55:42,399 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 14:55:42,400 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 14:55:42,400 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 14:55:42,400 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 14:55:42,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:55:42" (1/1) ... [2022-12-13 14:55:42,412 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:55:42" (1/1) ... [2022-12-13 14:55:42,426 INFO L138 Inliner]: procedures = 22, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2022-12-13 14:55:42,426 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 14:55:42,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 14:55:42,427 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 14:55:42,427 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 14:55:42,434 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:55:42" (1/1) ... [2022-12-13 14:55:42,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:55:42" (1/1) ... [2022-12-13 14:55:42,436 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:55:42" (1/1) ... [2022-12-13 14:55:42,436 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:55:42" (1/1) ... [2022-12-13 14:55:42,440 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:55:42" (1/1) ... [2022-12-13 14:55:42,443 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:55:42" (1/1) ... [2022-12-13 14:55:42,444 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:55:42" (1/1) ... [2022-12-13 14:55:42,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:55:42" (1/1) ... [2022-12-13 14:55:42,446 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 14:55:42,447 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 14:55:42,447 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 14:55:42,447 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 14:55:42,448 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:55:42" (1/1) ... [2022-12-13 14:55:42,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:55:42,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:55:42,472 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 14:55:42,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 14:55:42,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 14:55:42,499 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 14:55:42,499 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 14:55:42,499 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 14:55:42,499 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 14:55:42,499 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 14:55:42,500 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 14:55:42,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 14:55:42,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 14:55:42,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 14:55:42,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 14:55:42,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 14:55:42,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 14:55:42,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 14:55:42,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 14:55:42,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 14:55:42,502 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 14:55:42,580 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 14:55:42,581 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 14:55:42,817 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 14:55:42,840 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 14:55:42,840 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 14:55:42,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:55:42 BoogieIcfgContainer [2022-12-13 14:55:42,843 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 14:55:42,845 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 14:55:42,846 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 14:55:42,849 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 14:55:42,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 02:55:42" (1/3) ... [2022-12-13 14:55:42,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f13422b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:55:42, skipping insertion in model container [2022-12-13 14:55:42,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:55:42" (2/3) ... [2022-12-13 14:55:42,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f13422b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:55:42, skipping insertion in model container [2022-12-13 14:55:42,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:55:42" (3/3) ... [2022-12-13 14:55:42,852 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-3-extended.wvr.c [2022-12-13 14:55:42,870 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 14:55:42,870 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2022-12-13 14:55:42,870 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 14:55:42,960 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 14:55:43,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 145 transitions, 314 flow [2022-12-13 14:55:43,052 INFO L130 PetriNetUnfolder]: 16/142 cut-off events. [2022-12-13 14:55:43,053 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 14:55:43,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 142 events. 16/142 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 178 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 88. Up to 4 conditions per place. [2022-12-13 14:55:43,057 INFO L82 GeneralOperation]: Start removeDead. Operand has 139 places, 145 transitions, 314 flow [2022-12-13 14:55:43,062 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 131 places, 137 transitions, 292 flow [2022-12-13 14:55:43,065 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 14:55:43,073 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 131 places, 137 transitions, 292 flow [2022-12-13 14:55:43,075 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 131 places, 137 transitions, 292 flow [2022-12-13 14:55:43,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 137 transitions, 292 flow [2022-12-13 14:55:43,102 INFO L130 PetriNetUnfolder]: 16/137 cut-off events. [2022-12-13 14:55:43,102 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 14:55:43,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 137 events. 16/137 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 174 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 88. Up to 4 conditions per place. [2022-12-13 14:55:43,105 INFO L119 LiptonReduction]: Number of co-enabled transitions 3570 [2022-12-13 14:55:46,937 INFO L134 LiptonReduction]: Checked pairs total: 3337 [2022-12-13 14:55:46,937 INFO L136 LiptonReduction]: Total number of compositions: 141 [2022-12-13 14:55:46,950 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:55:46,956 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;@51a3bbfb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:55:46,956 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2022-12-13 14:55:46,957 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-12-13 14:55:46,957 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:55:46,957 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:55:46,958 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-12-13 14:55:46,958 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 14:55:46,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:55:46,962 INFO L85 PathProgramCache]: Analyzing trace with hash 587, now seen corresponding path program 1 times [2022-12-13 14:55:46,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:55:46,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212066251] [2022-12-13 14:55:46,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:55:46,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:55:47,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:55:47,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:55:47,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:55:47,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212066251] [2022-12-13 14:55:47,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212066251] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:55:47,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:55:47,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-13 14:55:47,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626729614] [2022-12-13 14:55:47,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:55:47,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 14:55:47,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:55:47,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 14:55:47,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 14:55:47,065 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 286 [2022-12-13 14:55:47,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 82 flow. Second operand has 2 states, 2 states have (on average 132.5) internal successors, (265), 2 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:47,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:55:47,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 286 [2022-12-13 14:55:47,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:55:47,153 INFO L130 PetriNetUnfolder]: 169/252 cut-off events. [2022-12-13 14:55:47,153 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-12-13 14:55:47,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 252 events. 169/252 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 544 event pairs, 81 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 380. Up to 253 conditions per place. [2022-12-13 14:55:47,156 INFO L137 encePairwiseOnDemand]: 283/286 looper letters, 29 selfloop transitions, 0 changer transitions 0/29 dead transitions. [2022-12-13 14:55:47,156 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 29 transitions, 134 flow [2022-12-13 14:55:47,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 14:55:47,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 14:55:47,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 296 transitions. [2022-12-13 14:55:47,167 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5174825174825175 [2022-12-13 14:55:47,168 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 296 transitions. [2022-12-13 14:55:47,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 296 transitions. [2022-12-13 14:55:47,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:55:47,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 296 transitions. [2022-12-13 14:55:47,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 148.0) internal successors, (296), 2 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:47,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 286.0) internal successors, (858), 3 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:47,179 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 286.0) internal successors, (858), 3 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:47,180 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 82 flow. Second operand 2 states and 296 transitions. [2022-12-13 14:55:47,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 29 transitions, 134 flow [2022-12-13 14:55:47,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 29 transitions, 122 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 14:55:47,185 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 64 flow [2022-12-13 14:55:47,187 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=64, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2022-12-13 14:55:47,190 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, -8 predicate places. [2022-12-13 14:55:47,191 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 64 flow [2022-12-13 14:55:47,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 132.5) internal successors, (265), 2 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:47,191 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:55:47,191 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 14:55:47,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 14:55:47,192 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 14:55:47,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:55:47,192 INFO L85 PathProgramCache]: Analyzing trace with hash 578307, now seen corresponding path program 1 times [2022-12-13 14:55:47,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:55:47,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300013578] [2022-12-13 14:55:47,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:55:47,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:55:47,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:55:47,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:55:47,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:55:47,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300013578] [2022-12-13 14:55:47,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300013578] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:55:47,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:55:47,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:55:47,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155903585] [2022-12-13 14:55:47,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:55:47,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:55:47,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:55:47,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:55:47,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:55:47,400 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 286 [2022-12-13 14:55:47,401 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:47,401 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:55:47,401 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 286 [2022-12-13 14:55:47,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:55:47,470 INFO L130 PetriNetUnfolder]: 159/236 cut-off events. [2022-12-13 14:55:47,470 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 14:55:47,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 236 events. 159/236 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 496 event pairs, 76 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 479. Up to 236 conditions per place. [2022-12-13 14:55:47,472 INFO L137 encePairwiseOnDemand]: 283/286 looper letters, 26 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2022-12-13 14:55:47,472 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 114 flow [2022-12-13 14:55:47,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:55:47,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:55:47,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 395 transitions. [2022-12-13 14:55:47,474 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4603729603729604 [2022-12-13 14:55:47,474 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 395 transitions. [2022-12-13 14:55:47,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 395 transitions. [2022-12-13 14:55:47,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:55:47,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 395 transitions. [2022-12-13 14:55:47,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:47,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:47,478 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:47,478 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 64 flow. Second operand 3 states and 395 transitions. [2022-12-13 14:55:47,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 114 flow [2022-12-13 14:55:47,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 27 transitions, 114 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 14:55:47,479 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 62 flow [2022-12-13 14:55:47,479 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2022-12-13 14:55:47,479 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, -8 predicate places. [2022-12-13 14:55:47,479 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 62 flow [2022-12-13 14:55:47,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:47,480 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:55:47,480 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 14:55:47,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 14:55:47,480 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 14:55:47,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:55:47,480 INFO L85 PathProgramCache]: Analyzing trace with hash 578308, now seen corresponding path program 1 times [2022-12-13 14:55:47,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:55:47,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632932157] [2022-12-13 14:55:47,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:55:47,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:55:47,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:55:47,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:55:47,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:55:47,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632932157] [2022-12-13 14:55:47,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632932157] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:55:47,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:55:47,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:55:47,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665287537] [2022-12-13 14:55:47,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:55:47,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:55:47,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:55:47,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:55:47,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:55:47,612 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 286 [2022-12-13 14:55:47,613 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:47,613 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:55:47,613 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 286 [2022-12-13 14:55:47,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:55:47,663 INFO L130 PetriNetUnfolder]: 149/220 cut-off events. [2022-12-13 14:55:47,663 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 14:55:47,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 220 events. 149/220 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 453 event pairs, 71 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 448. Up to 220 conditions per place. [2022-12-13 14:55:47,664 INFO L137 encePairwiseOnDemand]: 283/286 looper letters, 24 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2022-12-13 14:55:47,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 25 transitions, 108 flow [2022-12-13 14:55:47,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:55:47,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:55:47,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 408 transitions. [2022-12-13 14:55:47,665 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4755244755244755 [2022-12-13 14:55:47,666 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 408 transitions. [2022-12-13 14:55:47,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 408 transitions. [2022-12-13 14:55:47,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:55:47,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 408 transitions. [2022-12-13 14:55:47,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:47,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:47,668 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:47,668 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 62 flow. Second operand 3 states and 408 transitions. [2022-12-13 14:55:47,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 25 transitions, 108 flow [2022-12-13 14:55:47,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 25 transitions, 107 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:55:47,669 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 59 flow [2022-12-13 14:55:47,669 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2022-12-13 14:55:47,670 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, -9 predicate places. [2022-12-13 14:55:47,670 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 59 flow [2022-12-13 14:55:47,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:47,670 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:55:47,670 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 14:55:47,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 14:55:47,670 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 14:55:47,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:55:47,671 INFO L85 PathProgramCache]: Analyzing trace with hash 555765432, now seen corresponding path program 1 times [2022-12-13 14:55:47,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:55:47,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387323948] [2022-12-13 14:55:47,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:55:47,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:55:47,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:55:47,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:55:47,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:55:47,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387323948] [2022-12-13 14:55:47,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387323948] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:55:47,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:55:47,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:55:47,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181926215] [2022-12-13 14:55:47,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:55:47,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:55:47,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:55:47,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:55:47,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:55:47,746 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 286 [2022-12-13 14:55:47,747 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 59 flow. Second operand has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:47,747 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:55:47,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 286 [2022-12-13 14:55:47,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:55:47,797 INFO L130 PetriNetUnfolder]: 139/204 cut-off events. [2022-12-13 14:55:47,797 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 14:55:47,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 204 events. 139/204 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 409 event pairs, 66 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 417. Up to 204 conditions per place. [2022-12-13 14:55:47,798 INFO L137 encePairwiseOnDemand]: 283/286 looper letters, 22 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2022-12-13 14:55:47,798 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 23 transitions, 101 flow [2022-12-13 14:55:47,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:55:47,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:55:47,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 391 transitions. [2022-12-13 14:55:47,800 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4557109557109557 [2022-12-13 14:55:47,800 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 391 transitions. [2022-12-13 14:55:47,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 391 transitions. [2022-12-13 14:55:47,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:55:47,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 391 transitions. [2022-12-13 14:55:47,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:47,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:47,804 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:47,804 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 59 flow. Second operand 3 states and 391 transitions. [2022-12-13 14:55:47,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 23 transitions, 101 flow [2022-12-13 14:55:47,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 23 transitions, 100 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:55:47,805 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 56 flow [2022-12-13 14:55:47,805 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2022-12-13 14:55:47,806 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, -10 predicate places. [2022-12-13 14:55:47,806 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 56 flow [2022-12-13 14:55:47,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:47,807 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:55:47,807 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 14:55:47,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 14:55:47,807 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 14:55:47,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:55:47,807 INFO L85 PathProgramCache]: Analyzing trace with hash 555765433, now seen corresponding path program 1 times [2022-12-13 14:55:47,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:55:47,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417969085] [2022-12-13 14:55:47,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:55:47,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:55:47,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:55:47,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:55:47,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:55:47,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417969085] [2022-12-13 14:55:47,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417969085] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:55:47,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:55:47,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:55:47,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727440673] [2022-12-13 14:55:47,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:55:47,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:55:47,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:55:47,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:55:47,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:55:47,892 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 286 [2022-12-13 14:55:47,893 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:47,893 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:55:47,893 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 286 [2022-12-13 14:55:47,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:55:47,940 INFO L130 PetriNetUnfolder]: 129/188 cut-off events. [2022-12-13 14:55:47,940 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 14:55:47,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 390 conditions, 188 events. 129/188 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 359 event pairs, 61 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 386. Up to 188 conditions per place. [2022-12-13 14:55:47,942 INFO L137 encePairwiseOnDemand]: 283/286 looper letters, 20 selfloop transitions, 1 changer transitions 0/21 dead transitions. [2022-12-13 14:55:47,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 21 transitions, 94 flow [2022-12-13 14:55:47,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:55:47,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:55:47,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 404 transitions. [2022-12-13 14:55:47,944 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47086247086247085 [2022-12-13 14:55:47,944 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 404 transitions. [2022-12-13 14:55:47,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 404 transitions. [2022-12-13 14:55:47,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:55:47,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 404 transitions. [2022-12-13 14:55:47,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:47,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:47,947 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:47,947 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 56 flow. Second operand 3 states and 404 transitions. [2022-12-13 14:55:47,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 21 transitions, 94 flow [2022-12-13 14:55:47,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 21 transitions, 93 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:55:47,947 INFO L231 Difference]: Finished difference. Result has 28 places, 21 transitions, 53 flow [2022-12-13 14:55:47,948 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=28, PETRI_TRANSITIONS=21} [2022-12-13 14:55:47,948 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, -11 predicate places. [2022-12-13 14:55:47,948 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 21 transitions, 53 flow [2022-12-13 14:55:47,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:47,948 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:55:47,948 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:55:47,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 14:55:47,949 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 14:55:47,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:55:47,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1514647755, now seen corresponding path program 1 times [2022-12-13 14:55:47,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:55:47,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747380718] [2022-12-13 14:55:47,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:55:47,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:55:47,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:55:48,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:55:48,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:55:48,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747380718] [2022-12-13 14:55:48,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747380718] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:55:48,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:55:48,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:55:48,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067949905] [2022-12-13 14:55:48,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:55:48,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 14:55:48,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:55:48,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 14:55:48,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:55:48,099 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 286 [2022-12-13 14:55:48,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 53 flow. Second operand has 5 states, 5 states have (on average 115.4) internal successors, (577), 5 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:48,100 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:55:48,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 286 [2022-12-13 14:55:48,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:55:48,145 INFO L130 PetriNetUnfolder]: 105/156 cut-off events. [2022-12-13 14:55:48,145 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 14:55:48,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 156 events. 105/156 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 274 event pairs, 49 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 323. Up to 156 conditions per place. [2022-12-13 14:55:48,147 INFO L137 encePairwiseOnDemand]: 284/286 looper letters, 19 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2022-12-13 14:55:48,147 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 20 transitions, 91 flow [2022-12-13 14:55:48,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:55:48,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:55:48,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2022-12-13 14:55:48,148 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4230769230769231 [2022-12-13 14:55:48,149 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 363 transitions. [2022-12-13 14:55:48,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 363 transitions. [2022-12-13 14:55:48,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:55:48,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 363 transitions. [2022-12-13 14:55:48,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:48,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:48,153 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:48,153 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 53 flow. Second operand 3 states and 363 transitions. [2022-12-13 14:55:48,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 20 transitions, 91 flow [2022-12-13 14:55:48,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 20 transitions, 90 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:55:48,154 INFO L231 Difference]: Finished difference. Result has 28 places, 20 transitions, 52 flow [2022-12-13 14:55:48,154 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=28, PETRI_TRANSITIONS=20} [2022-12-13 14:55:48,155 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, -11 predicate places. [2022-12-13 14:55:48,155 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 20 transitions, 52 flow [2022-12-13 14:55:48,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 115.4) internal successors, (577), 5 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:48,155 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:55:48,156 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:55:48,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 14:55:48,156 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 14:55:48,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:55:48,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1514647756, now seen corresponding path program 1 times [2022-12-13 14:55:48,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:55:48,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140960816] [2022-12-13 14:55:48,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:55:48,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:55:48,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:55:48,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:55:48,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:55:48,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140960816] [2022-12-13 14:55:48,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140960816] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:55:48,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:55:48,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:55:48,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187923636] [2022-12-13 14:55:48,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:55:48,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:55:48,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:55:48,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:55:48,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:55:48,300 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 286 [2022-12-13 14:55:48,301 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 20 transitions, 52 flow. Second operand has 4 states, 4 states have (on average 126.75) internal successors, (507), 4 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:48,301 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:55:48,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 286 [2022-12-13 14:55:48,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:55:48,339 INFO L130 PetriNetUnfolder]: 81/124 cut-off events. [2022-12-13 14:55:48,339 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 14:55:48,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 124 events. 81/124 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 195 event pairs, 37 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 260. Up to 124 conditions per place. [2022-12-13 14:55:48,340 INFO L137 encePairwiseOnDemand]: 284/286 looper letters, 18 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2022-12-13 14:55:48,340 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 19 transitions, 88 flow [2022-12-13 14:55:48,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:55:48,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:55:48,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 395 transitions. [2022-12-13 14:55:48,343 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4603729603729604 [2022-12-13 14:55:48,343 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 395 transitions. [2022-12-13 14:55:48,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 395 transitions. [2022-12-13 14:55:48,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:55:48,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 395 transitions. [2022-12-13 14:55:48,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:48,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:48,345 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:48,345 INFO L175 Difference]: Start difference. First operand has 28 places, 20 transitions, 52 flow. Second operand 3 states and 395 transitions. [2022-12-13 14:55:48,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 19 transitions, 88 flow [2022-12-13 14:55:48,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 19 transitions, 87 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:55:48,346 INFO L231 Difference]: Finished difference. Result has 28 places, 19 transitions, 51 flow [2022-12-13 14:55:48,346 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=51, PETRI_PLACES=28, PETRI_TRANSITIONS=19} [2022-12-13 14:55:48,346 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, -11 predicate places. [2022-12-13 14:55:48,346 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 19 transitions, 51 flow [2022-12-13 14:55:48,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 126.75) internal successors, (507), 4 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:48,347 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:55:48,347 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:55:48,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 14:55:48,347 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 14:55:48,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:55:48,347 INFO L85 PathProgramCache]: Analyzing trace with hash 586572406, now seen corresponding path program 1 times [2022-12-13 14:55:48,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:55:48,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875856678] [2022-12-13 14:55:48,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:55:48,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:55:48,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:55:48,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:55:48,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:55:48,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875856678] [2022-12-13 14:55:48,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875856678] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:55:48,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:55:48,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:55:48,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755211265] [2022-12-13 14:55:48,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:55:48,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:55:48,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:55:48,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:55:48,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:55:48,414 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 286 [2022-12-13 14:55:48,415 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 19 transitions, 51 flow. Second operand has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:48,415 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:55:48,415 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 286 [2022-12-13 14:55:48,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:55:48,481 INFO L130 PetriNetUnfolder]: 111/168 cut-off events. [2022-12-13 14:55:48,481 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 14:55:48,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 168 events. 111/168 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 356 event pairs, 7 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 352. Up to 137 conditions per place. [2022-12-13 14:55:48,482 INFO L137 encePairwiseOnDemand]: 283/286 looper letters, 27 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2022-12-13 14:55:48,483 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 29 transitions, 131 flow [2022-12-13 14:55:48,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:55:48,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:55:48,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 414 transitions. [2022-12-13 14:55:48,484 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4825174825174825 [2022-12-13 14:55:48,484 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 414 transitions. [2022-12-13 14:55:48,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 414 transitions. [2022-12-13 14:55:48,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:55:48,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 414 transitions. [2022-12-13 14:55:48,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:48,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:48,487 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:48,488 INFO L175 Difference]: Start difference. First operand has 28 places, 19 transitions, 51 flow. Second operand 3 states and 414 transitions. [2022-12-13 14:55:48,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 29 transitions, 131 flow [2022-12-13 14:55:48,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 29 transitions, 130 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:55:48,489 INFO L231 Difference]: Finished difference. Result has 30 places, 20 transitions, 62 flow [2022-12-13 14:55:48,489 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=30, PETRI_TRANSITIONS=20} [2022-12-13 14:55:48,489 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, -9 predicate places. [2022-12-13 14:55:48,490 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 20 transitions, 62 flow [2022-12-13 14:55:48,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:48,490 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:55:48,490 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:55:48,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 14:55:48,490 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 14:55:48,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:55:48,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1661018857, now seen corresponding path program 1 times [2022-12-13 14:55:48,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:55:48,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037882078] [2022-12-13 14:55:48,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:55:48,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:55:48,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:55:48,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:55:48,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:55:48,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037882078] [2022-12-13 14:55:48,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037882078] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:55:48,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:55:48,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:55:48,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377737987] [2022-12-13 14:55:48,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:55:48,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:55:48,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:55:48,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:55:48,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:55:48,563 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 286 [2022-12-13 14:55:48,564 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 20 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:48,564 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:55:48,564 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 286 [2022-12-13 14:55:48,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:55:48,627 INFO L130 PetriNetUnfolder]: 161/240 cut-off events. [2022-12-13 14:55:48,627 INFO L131 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2022-12-13 14:55:48,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 585 conditions, 240 events. 161/240 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 580 event pairs, 19 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 580. Up to 177 conditions per place. [2022-12-13 14:55:48,629 INFO L137 encePairwiseOnDemand]: 283/286 looper letters, 29 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2022-12-13 14:55:48,629 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 31 transitions, 155 flow [2022-12-13 14:55:48,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:55:48,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:55:48,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 414 transitions. [2022-12-13 14:55:48,631 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4825174825174825 [2022-12-13 14:55:48,631 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 414 transitions. [2022-12-13 14:55:48,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 414 transitions. [2022-12-13 14:55:48,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:55:48,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 414 transitions. [2022-12-13 14:55:48,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:48,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:48,632 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:48,632 INFO L175 Difference]: Start difference. First operand has 30 places, 20 transitions, 62 flow. Second operand 3 states and 414 transitions. [2022-12-13 14:55:48,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 31 transitions, 155 flow [2022-12-13 14:55:48,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 31 transitions, 152 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:55:48,633 INFO L231 Difference]: Finished difference. Result has 32 places, 21 transitions, 72 flow [2022-12-13 14:55:48,633 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=32, PETRI_TRANSITIONS=21} [2022-12-13 14:55:48,634 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, -7 predicate places. [2022-12-13 14:55:48,634 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 21 transitions, 72 flow [2022-12-13 14:55:48,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:48,634 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:55:48,634 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:55:48,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 14:55:48,634 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 14:55:48,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:55:48,635 INFO L85 PathProgramCache]: Analyzing trace with hash 574444086, now seen corresponding path program 1 times [2022-12-13 14:55:48,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:55:48,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585775849] [2022-12-13 14:55:48,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:55:48,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:55:48,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:55:48,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 14:55:48,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:55:48,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585775849] [2022-12-13 14:55:48,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585775849] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:55:48,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:55:48,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:55:48,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913088136] [2022-12-13 14:55:48,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:55:48,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:55:48,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:55:48,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:55:48,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:55:48,691 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 286 [2022-12-13 14:55:48,692 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 21 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:48,692 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:55:48,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 286 [2022-12-13 14:55:48,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:55:48,761 INFO L130 PetriNetUnfolder]: 220/325 cut-off events. [2022-12-13 14:55:48,761 INFO L131 PetriNetUnfolder]: For 109/109 co-relation queries the response was YES. [2022-12-13 14:55:48,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 875 conditions, 325 events. 220/325 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 800 event pairs, 48 based on Foata normal form. 0/243 useless extension candidates. Maximal degree in co-relation 869. Up to 199 conditions per place. [2022-12-13 14:55:48,764 INFO L137 encePairwiseOnDemand]: 283/286 looper letters, 31 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2022-12-13 14:55:48,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 33 transitions, 177 flow [2022-12-13 14:55:48,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:55:48,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:55:48,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 414 transitions. [2022-12-13 14:55:48,765 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4825174825174825 [2022-12-13 14:55:48,765 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 414 transitions. [2022-12-13 14:55:48,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 414 transitions. [2022-12-13 14:55:48,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:55:48,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 414 transitions. [2022-12-13 14:55:48,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:48,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:48,767 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:48,767 INFO L175 Difference]: Start difference. First operand has 32 places, 21 transitions, 72 flow. Second operand 3 states and 414 transitions. [2022-12-13 14:55:48,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 33 transitions, 177 flow [2022-12-13 14:55:48,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 33 transitions, 174 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:55:48,768 INFO L231 Difference]: Finished difference. Result has 34 places, 22 transitions, 82 flow [2022-12-13 14:55:48,768 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=34, PETRI_TRANSITIONS=22} [2022-12-13 14:55:48,768 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, -5 predicate places. [2022-12-13 14:55:48,769 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 22 transitions, 82 flow [2022-12-13 14:55:48,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:48,769 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:55:48,769 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:55:48,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 14:55:48,769 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 14:55:48,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:55:48,769 INFO L85 PathProgramCache]: Analyzing trace with hash 2006871138, now seen corresponding path program 1 times [2022-12-13 14:55:48,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:55:48,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265324648] [2022-12-13 14:55:48,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:55:48,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:55:48,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:55:48,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 14:55:48,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:55:48,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265324648] [2022-12-13 14:55:48,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265324648] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:55:48,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599779988] [2022-12-13 14:55:48,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:55:48,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:55:48,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:55:48,930 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:55:48,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 14:55:48,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:55:49,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 14:55:49,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:55:49,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:55:49,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:55:49,437 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:55:49,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599779988] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:55:49,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:55:49,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 7 [2022-12-13 14:55:49,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683296321] [2022-12-13 14:55:49,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:55:49,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 14:55:49,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:55:49,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 14:55:49,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-13 14:55:49,467 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 286 [2022-12-13 14:55:49,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 22 transitions, 82 flow. Second operand has 8 states, 8 states have (on average 119.875) internal successors, (959), 8 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) [2022-12-13 14:55:49,468 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:55:49,468 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 286 [2022-12-13 14:55:49,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:55:49,665 INFO L130 PetriNetUnfolder]: 339/498 cut-off events. [2022-12-13 14:55:49,665 INFO L131 PetriNetUnfolder]: For 202/202 co-relation queries the response was YES. [2022-12-13 14:55:49,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1431 conditions, 498 events. 339/498 cut-off events. For 202/202 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1463 event pairs, 6 based on Foata normal form. 0/380 useless extension candidates. Maximal degree in co-relation 1424. Up to 147 conditions per place. [2022-12-13 14:55:49,667 INFO L137 encePairwiseOnDemand]: 281/286 looper letters, 73 selfloop transitions, 11 changer transitions 0/84 dead transitions. [2022-12-13 14:55:49,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 84 transitions, 451 flow [2022-12-13 14:55:49,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 14:55:49,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 14:55:49,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 996 transitions. [2022-12-13 14:55:49,669 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4353146853146853 [2022-12-13 14:55:49,669 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 996 transitions. [2022-12-13 14:55:49,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 996 transitions. [2022-12-13 14:55:49,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:55:49,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 996 transitions. [2022-12-13 14:55:49,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 124.5) internal successors, (996), 8 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:49,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 286.0) internal successors, (2574), 9 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:49,673 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 286.0) internal successors, (2574), 9 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:49,673 INFO L175 Difference]: Start difference. First operand has 34 places, 22 transitions, 82 flow. Second operand 8 states and 996 transitions. [2022-12-13 14:55:49,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 84 transitions, 451 flow [2022-12-13 14:55:49,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 84 transitions, 448 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:55:49,675 INFO L231 Difference]: Finished difference. Result has 43 places, 30 transitions, 155 flow [2022-12-13 14:55:49,675 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=155, PETRI_PLACES=43, PETRI_TRANSITIONS=30} [2022-12-13 14:55:49,675 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 4 predicate places. [2022-12-13 14:55:49,675 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 30 transitions, 155 flow [2022-12-13 14:55:49,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 119.875) internal successors, (959), 8 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) [2022-12-13 14:55:49,676 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:55:49,676 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:55:49,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 14:55:49,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:55:49,878 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 14:55:49,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:55:49,879 INFO L85 PathProgramCache]: Analyzing trace with hash 125808016, now seen corresponding path program 2 times [2022-12-13 14:55:49,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:55:49,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964966039] [2022-12-13 14:55:49,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:55:49,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:55:49,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:55:50,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 14:55:50,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:55:50,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964966039] [2022-12-13 14:55:50,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964966039] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:55:50,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46772806] [2022-12-13 14:55:50,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:55:50,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:55:50,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:55:50,158 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:55:50,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 14:55:50,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:55:50,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:55:50,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 14:55:50,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:55:50,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 14:55:50,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:55:50,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 14:55:50,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46772806] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:55:50,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:55:50,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-12-13 14:55:50,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656989595] [2022-12-13 14:55:50,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:55:50,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 14:55:50,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:55:50,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 14:55:50,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-13 14:55:50,540 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 286 [2022-12-13 14:55:50,541 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 30 transitions, 155 flow. Second operand has 8 states, 8 states have (on average 112.125) internal successors, (897), 8 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:50,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:55:50,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 286 [2022-12-13 14:55:50,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:55:50,860 INFO L130 PetriNetUnfolder]: 543/790 cut-off events. [2022-12-13 14:55:50,860 INFO L131 PetriNetUnfolder]: For 1189/1189 co-relation queries the response was YES. [2022-12-13 14:55:50,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2693 conditions, 790 events. 543/790 cut-off events. For 1189/1189 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2546 event pairs, 4 based on Foata normal form. 42/734 useless extension candidates. Maximal degree in co-relation 2684. Up to 225 conditions per place. [2022-12-13 14:55:50,864 INFO L137 encePairwiseOnDemand]: 280/286 looper letters, 127 selfloop transitions, 40 changer transitions 0/167 dead transitions. [2022-12-13 14:55:50,864 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 167 transitions, 1132 flow [2022-12-13 14:55:50,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 14:55:50,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 14:55:50,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2179 transitions. [2022-12-13 14:55:50,868 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40099374309900626 [2022-12-13 14:55:50,868 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2179 transitions. [2022-12-13 14:55:50,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2179 transitions. [2022-12-13 14:55:50,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:55:50,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2179 transitions. [2022-12-13 14:55:50,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 114.6842105263158) internal successors, (2179), 19 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:50,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 286.0) internal successors, (5720), 20 states have internal predecessors, (5720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:50,883 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 286.0) internal successors, (5720), 20 states have internal predecessors, (5720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:50,883 INFO L175 Difference]: Start difference. First operand has 43 places, 30 transitions, 155 flow. Second operand 19 states and 2179 transitions. [2022-12-13 14:55:50,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 167 transitions, 1132 flow [2022-12-13 14:55:50,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 167 transitions, 980 flow, removed 63 selfloop flow, removed 2 redundant places. [2022-12-13 14:55:50,888 INFO L231 Difference]: Finished difference. Result has 67 places, 64 transitions, 458 flow [2022-12-13 14:55:50,888 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=458, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2022-12-13 14:55:50,888 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 28 predicate places. [2022-12-13 14:55:50,888 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 458 flow [2022-12-13 14:55:50,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 112.125) internal successors, (897), 8 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:50,889 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:55:50,889 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:55:50,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 14:55:51,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:55:51,089 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 14:55:51,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:55:51,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1942237112, now seen corresponding path program 3 times [2022-12-13 14:55:51,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:55:51,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614636832] [2022-12-13 14:55:51,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:55:51,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:55:51,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:55:51,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:55:51,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:55:51,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614636832] [2022-12-13 14:55:51,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614636832] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:55:51,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473837968] [2022-12-13 14:55:51,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 14:55:51,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:55:51,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:55:51,891 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:55:51,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 14:55:51,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 14:55:51,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:55:51,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 14:55:51,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:55:52,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:55:52,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:55:53,175 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:55:53,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473837968] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:55:53,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:55:53,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2022-12-13 14:55:53,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646186726] [2022-12-13 14:55:53,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:55:53,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 14:55:53,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:55:53,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 14:55:53,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2022-12-13 14:55:53,384 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 286 [2022-12-13 14:55:53,386 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 458 flow. Second operand has 22 states, 22 states have (on average 94.54545454545455) internal successors, (2080), 22 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:53,386 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:55:53,386 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 286 [2022-12-13 14:55:53,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:55:56,590 INFO L130 PetriNetUnfolder]: 3663/5168 cut-off events. [2022-12-13 14:55:56,590 INFO L131 PetriNetUnfolder]: For 20290/20290 co-relation queries the response was YES. [2022-12-13 14:55:56,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25097 conditions, 5168 events. 3663/5168 cut-off events. For 20290/20290 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 24109 event pairs, 16 based on Foata normal form. 6/4326 useless extension candidates. Maximal degree in co-relation 25080. Up to 1817 conditions per place. [2022-12-13 14:55:56,626 INFO L137 encePairwiseOnDemand]: 278/286 looper letters, 275 selfloop transitions, 441 changer transitions 20/736 dead transitions. [2022-12-13 14:55:56,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 736 transitions, 6124 flow [2022-12-13 14:55:56,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-12-13 14:55:56,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2022-12-13 14:55:56,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 5583 transitions. [2022-12-13 14:55:56,637 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3485889110889111 [2022-12-13 14:55:56,637 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 5583 transitions. [2022-12-13 14:55:56,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 5583 transitions. [2022-12-13 14:55:56,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:55:56,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 5583 transitions. [2022-12-13 14:55:56,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 99.69642857142857) internal successors, (5583), 56 states have internal predecessors, (5583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:56,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 286.0) internal successors, (16302), 57 states have internal predecessors, (16302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:56,668 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 286.0) internal successors, (16302), 57 states have internal predecessors, (16302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:56,668 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 458 flow. Second operand 56 states and 5583 transitions. [2022-12-13 14:55:56,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 736 transitions, 6124 flow [2022-12-13 14:55:56,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 736 transitions, 5175 flow, removed 416 selfloop flow, removed 5 redundant places. [2022-12-13 14:55:56,738 INFO L231 Difference]: Finished difference. Result has 120 places, 531 transitions, 4251 flow [2022-12-13 14:55:56,738 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=4251, PETRI_PLACES=120, PETRI_TRANSITIONS=531} [2022-12-13 14:55:56,738 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 81 predicate places. [2022-12-13 14:55:56,738 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 531 transitions, 4251 flow [2022-12-13 14:55:56,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 94.54545454545455) internal successors, (2080), 22 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:56,739 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:55:56,739 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:55:56,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 14:55:56,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 14:55:56,940 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 14:55:56,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:55:56,941 INFO L85 PathProgramCache]: Analyzing trace with hash 747041908, now seen corresponding path program 4 times [2022-12-13 14:55:56,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:55:56,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259027266] [2022-12-13 14:55:56,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:55:56,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:55:57,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:55:57,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:55:57,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:55:57,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259027266] [2022-12-13 14:55:57,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259027266] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:55:57,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708742988] [2022-12-13 14:55:57,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 14:55:57,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:55:57,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:55:57,760 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:55:57,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 14:55:57,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 14:55:57,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:55:57,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 14:55:57,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:55:58,106 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:55:58,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:55:58,779 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:55:58,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708742988] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:55:58,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:55:58,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2022-12-13 14:55:58,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470653571] [2022-12-13 14:55:58,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:55:58,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 14:55:58,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:55:58,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 14:55:58,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2022-12-13 14:55:59,001 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 286 [2022-12-13 14:55:59,003 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 531 transitions, 4251 flow. Second operand has 24 states, 24 states have (on average 93.54166666666667) internal successors, (2245), 24 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:55:59,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:55:59,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 286 [2022-12-13 14:55:59,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:56:06,213 INFO L130 PetriNetUnfolder]: 7796/11300 cut-off events. [2022-12-13 14:56:06,213 INFO L131 PetriNetUnfolder]: For 47998/47998 co-relation queries the response was YES. [2022-12-13 14:56:06,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58420 conditions, 11300 events. 7796/11300 cut-off events. For 47998/47998 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 62721 event pairs, 8 based on Foata normal form. 21/9503 useless extension candidates. Maximal degree in co-relation 58401. Up to 3021 conditions per place. [2022-12-13 14:56:06,282 INFO L137 encePairwiseOnDemand]: 278/286 looper letters, 575 selfloop transitions, 1416 changer transitions 93/2084 dead transitions. [2022-12-13 14:56:06,282 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 2084 transitions, 19515 flow [2022-12-13 14:56:06,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-12-13 14:56:06,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2022-12-13 14:56:06,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 9093 transitions. [2022-12-13 14:56:06,295 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.34558376406202496 [2022-12-13 14:56:06,295 INFO L72 ComplementDD]: Start complementDD. Operand 92 states and 9093 transitions. [2022-12-13 14:56:06,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 92 states and 9093 transitions. [2022-12-13 14:56:06,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:56:06,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 92 states and 9093 transitions. [2022-12-13 14:56:06,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 93 states, 92 states have (on average 98.83695652173913) internal successors, (9093), 92 states have internal predecessors, (9093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:56:06,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 93 states, 93 states have (on average 286.0) internal successors, (26598), 93 states have internal predecessors, (26598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:56:06,330 INFO L81 ComplementDD]: Finished complementDD. Result has 93 states, 93 states have (on average 286.0) internal successors, (26598), 93 states have internal predecessors, (26598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:56:06,330 INFO L175 Difference]: Start difference. First operand has 120 places, 531 transitions, 4251 flow. Second operand 92 states and 9093 transitions. [2022-12-13 14:56:06,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 2084 transitions, 19515 flow [2022-12-13 14:56:07,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 2084 transitions, 16506 flow, removed 1472 selfloop flow, removed 6 redundant places. [2022-12-13 14:56:07,257 INFO L231 Difference]: Finished difference. Result has 231 places, 1634 transitions, 15753 flow [2022-12-13 14:56:07,257 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=3460, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=454, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=92, PETRI_FLOW=15753, PETRI_PLACES=231, PETRI_TRANSITIONS=1634} [2022-12-13 14:56:07,257 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 192 predicate places. [2022-12-13 14:56:07,257 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 1634 transitions, 15753 flow [2022-12-13 14:56:07,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 93.54166666666667) internal successors, (2245), 24 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:56:07,258 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:56:07,258 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:56:07,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 14:56:07,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 14:56:07,460 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 14:56:07,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:56:07,461 INFO L85 PathProgramCache]: Analyzing trace with hash 453091840, now seen corresponding path program 5 times [2022-12-13 14:56:07,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:56:07,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351487406] [2022-12-13 14:56:07,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:56:07,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:56:07,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:56:08,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:56:08,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:56:08,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351487406] [2022-12-13 14:56:08,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351487406] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:56:08,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315566861] [2022-12-13 14:56:08,120 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 14:56:08,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:56:08,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:56:08,121 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:56:08,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 14:56:08,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:56:08,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:56:08,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 14:56:08,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:56:08,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:56:08,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:56:09,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:56:09,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315566861] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:56:09,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:56:09,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2022-12-13 14:56:09,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781629213] [2022-12-13 14:56:09,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:56:09,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 14:56:09,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:56:09,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 14:56:09,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-12-13 14:56:09,455 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 286 [2022-12-13 14:56:09,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 1634 transitions, 15753 flow. Second operand has 24 states, 24 states have (on average 93.5) internal successors, (2244), 24 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:56:09,456 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:56:09,456 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 286 [2022-12-13 14:56:09,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:56:24,619 INFO L130 PetriNetUnfolder]: 22665/33292 cut-off events. [2022-12-13 14:56:24,619 INFO L131 PetriNetUnfolder]: For 96051/96051 co-relation queries the response was YES. [2022-12-13 14:56:24,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176120 conditions, 33292 events. 22665/33292 cut-off events. For 96051/96051 co-relation queries the response was YES. Maximal size of possible extension queue 1731. Compared 222985 event pairs, 108 based on Foata normal form. 473/32475 useless extension candidates. Maximal degree in co-relation 176077. Up to 9183 conditions per place. [2022-12-13 14:56:24,932 INFO L137 encePairwiseOnDemand]: 278/286 looper letters, 1217 selfloop transitions, 4685 changer transitions 114/6016 dead transitions. [2022-12-13 14:56:24,932 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 6016 transitions, 68074 flow [2022-12-13 14:56:24,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-12-13 14:56:24,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2022-12-13 14:56:24,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 9624 transitions. [2022-12-13 14:56:24,947 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3505244755244755 [2022-12-13 14:56:24,947 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 9624 transitions. [2022-12-13 14:56:24,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 9624 transitions. [2022-12-13 14:56:24,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:56:24,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 9624 transitions. [2022-12-13 14:56:24,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 97 states, 96 states have (on average 100.25) internal successors, (9624), 96 states have internal predecessors, (9624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:56:24,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 97 states, 97 states have (on average 286.0) internal successors, (27742), 97 states have internal predecessors, (27742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:56:24,989 INFO L81 ComplementDD]: Finished complementDD. Result has 97 states, 97 states have (on average 286.0) internal successors, (27742), 97 states have internal predecessors, (27742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:56:24,990 INFO L175 Difference]: Start difference. First operand has 231 places, 1634 transitions, 15753 flow. Second operand 96 states and 9624 transitions. [2022-12-13 14:56:24,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 6016 transitions, 68074 flow [2022-12-13 14:56:31,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 6016 transitions, 66416 flow, removed 823 selfloop flow, removed 3 redundant places. [2022-12-13 14:56:31,875 INFO L231 Difference]: Finished difference. Result has 374 places, 5379 transitions, 69323 flow [2022-12-13 14:56:31,876 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=15096, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1394, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=69323, PETRI_PLACES=374, PETRI_TRANSITIONS=5379} [2022-12-13 14:56:31,876 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 335 predicate places. [2022-12-13 14:56:31,876 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 5379 transitions, 69323 flow [2022-12-13 14:56:31,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 93.5) internal successors, (2244), 24 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:56:31,877 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:56:31,877 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:56:31,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 14:56:32,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 14:56:32,078 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 14:56:32,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:56:32,080 INFO L85 PathProgramCache]: Analyzing trace with hash 574915088, now seen corresponding path program 6 times [2022-12-13 14:56:32,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:56:32,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964623242] [2022-12-13 14:56:32,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:56:32,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:56:32,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:56:32,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:56:32,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:56:32,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964623242] [2022-12-13 14:56:32,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964623242] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:56:32,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024032878] [2022-12-13 14:56:32,745 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 14:56:32,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:56:32,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:56:32,746 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:56:32,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 14:56:32,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-13 14:56:32,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:56:32,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 14:56:32,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:56:33,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:56:33,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:56:33,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:56:33,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024032878] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:56:33,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:56:33,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 20 [2022-12-13 14:56:33,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736371329] [2022-12-13 14:56:33,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:56:33,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 14:56:33,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:56:33,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 14:56:33,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-12-13 14:56:33,926 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 286 [2022-12-13 14:56:33,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 5379 transitions, 69323 flow. Second operand has 22 states, 22 states have (on average 93.54545454545455) internal successors, (2058), 22 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:56:33,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:56:33,928 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 286 [2022-12-13 14:56:33,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:57:15,636 INFO L130 PetriNetUnfolder]: 40545/59451 cut-off events. [2022-12-13 14:57:15,636 INFO L131 PetriNetUnfolder]: For 307949/307949 co-relation queries the response was YES. [2022-12-13 14:57:16,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 399346 conditions, 59451 events. 40545/59451 cut-off events. For 307949/307949 co-relation queries the response was YES. Maximal size of possible extension queue 3170. Compared 427389 event pairs, 52 based on Foata normal form. 143/59280 useless extension candidates. Maximal degree in co-relation 399252. Up to 15199 conditions per place. [2022-12-13 14:57:16,582 INFO L137 encePairwiseOnDemand]: 278/286 looper letters, 2285 selfloop transitions, 9289 changer transitions 268/11842 dead transitions. [2022-12-13 14:57:16,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 11842 transitions, 179226 flow [2022-12-13 14:57:16,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-12-13 14:57:16,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2022-12-13 14:57:16,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 7650 transitions. [2022-12-13 14:57:16,591 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.34737989283443826 [2022-12-13 14:57:16,591 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 7650 transitions. [2022-12-13 14:57:16,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 7650 transitions. [2022-12-13 14:57:16,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:57:16,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 7650 transitions. [2022-12-13 14:57:16,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 99.35064935064935) internal successors, (7650), 77 states have internal predecessors, (7650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:57:16,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 286.0) internal successors, (22308), 78 states have internal predecessors, (22308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:57:16,614 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 286.0) internal successors, (22308), 78 states have internal predecessors, (22308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:57:16,614 INFO L175 Difference]: Start difference. First operand has 374 places, 5379 transitions, 69323 flow. Second operand 77 states and 7650 transitions. [2022-12-13 14:57:16,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 11842 transitions, 179226 flow [2022-12-13 14:58:33,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 11842 transitions, 174744 flow, removed 2191 selfloop flow, removed 11 redundant places. [2022-12-13 14:58:33,682 INFO L231 Difference]: Finished difference. Result has 477 places, 11078 transitions, 180627 flow [2022-12-13 14:58:33,684 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=67479, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=180627, PETRI_PLACES=477, PETRI_TRANSITIONS=11078} [2022-12-13 14:58:33,685 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 438 predicate places. [2022-12-13 14:58:33,685 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 11078 transitions, 180627 flow [2022-12-13 14:58:33,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 93.54545454545455) internal successors, (2058), 22 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:33,685 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:58:33,685 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:58:33,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-13 14:58:33,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 14:58:33,886 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 14:58:33,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:58:33,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1816490381, now seen corresponding path program 7 times [2022-12-13 14:58:33,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:58:33,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339972937] [2022-12-13 14:58:33,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:58:33,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:58:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:58:34,219 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:58:34,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:58:34,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339972937] [2022-12-13 14:58:34,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339972937] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:58:34,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410334769] [2022-12-13 14:58:34,219 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 14:58:34,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:58:34,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:58:34,220 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:58:34,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 14:58:34,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:58:34,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 14:58:34,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:58:34,528 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:58:34,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:58:34,727 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:58:34,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410334769] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:58:34,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:58:34,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 6] total 15 [2022-12-13 14:58:34,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006578524] [2022-12-13 14:58:34,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:58:34,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 14:58:34,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:58:34,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 14:58:34,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-12-13 14:58:34,797 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 286 [2022-12-13 14:58:34,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 11078 transitions, 180627 flow. Second operand has 16 states, 16 states have (on average 113.375) internal successors, (1814), 16 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:58:34,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:58:34,798 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 286 [2022-12-13 14:58:34,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:59:56,069 INFO L130 PetriNetUnfolder]: 35394/52193 cut-off events. [2022-12-13 14:59:56,069 INFO L131 PetriNetUnfolder]: For 438573/438573 co-relation queries the response was YES. [2022-12-13 14:59:56,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400976 conditions, 52193 events. 35394/52193 cut-off events. For 438573/438573 co-relation queries the response was YES. Maximal size of possible extension queue 2743. Compared 373061 event pairs, 492 based on Foata normal form. 4902/57079 useless extension candidates. Maximal degree in co-relation 400844. Up to 16411 conditions per place. [2022-12-13 14:59:57,167 INFO L137 encePairwiseOnDemand]: 280/286 looper letters, 5891 selfloop transitions, 4468 changer transitions 378/10737 dead transitions. [2022-12-13 14:59:57,167 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 10737 transitions, 195235 flow [2022-12-13 14:59:57,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 14:59:57,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 14:59:57,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1533 transitions. [2022-12-13 14:59:57,169 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41231845077998924 [2022-12-13 14:59:57,169 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1533 transitions. [2022-12-13 14:59:57,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1533 transitions. [2022-12-13 14:59:57,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:59:57,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1533 transitions. [2022-12-13 14:59:57,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 117.92307692307692) internal successors, (1533), 13 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:59:57,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 286.0) internal successors, (4004), 14 states have internal predecessors, (4004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:59:57,173 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 286.0) internal successors, (4004), 14 states have internal predecessors, (4004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:59:57,173 INFO L175 Difference]: Start difference. First operand has 477 places, 11078 transitions, 180627 flow. Second operand 13 states and 1533 transitions. [2022-12-13 14:59:57,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 10737 transitions, 195235 flow [2022-12-13 15:01:47,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 10737 transitions, 188517 flow, removed 2625 selfloop flow, removed 12 redundant places. [2022-12-13 15:01:47,760 INFO L231 Difference]: Finished difference. Result has 474 places, 9550 transitions, 161937 flow [2022-12-13 15:01:47,764 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=141287, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9081, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3794, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=161937, PETRI_PLACES=474, PETRI_TRANSITIONS=9550} [2022-12-13 15:01:47,764 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 435 predicate places. [2022-12-13 15:01:47,764 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 9550 transitions, 161937 flow [2022-12-13 15:01:47,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 113.375) internal successors, (1814), 16 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:47,764 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:01:47,764 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:01:47,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 15:01:47,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:47,966 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 15:01:47,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:01:47,967 INFO L85 PathProgramCache]: Analyzing trace with hash 948724172, now seen corresponding path program 8 times [2022-12-13 15:01:47,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:01:47,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675328880] [2022-12-13 15:01:47,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:01:47,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:01:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:01:48,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:48,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:01:48,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675328880] [2022-12-13 15:01:48,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675328880] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:01:48,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836536500] [2022-12-13 15:01:48,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:01:48,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:01:48,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:01:48,600 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:01:48,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 15:01:48,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:01:48,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:01:48,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 15:01:48,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:01:49,007 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:49,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:01:49,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:01:49,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836536500] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:01:49,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:01:49,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2022-12-13 15:01:49,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718521048] [2022-12-13 15:01:49,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:01:49,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 15:01:49,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:01:49,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 15:01:49,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-12-13 15:01:50,098 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 286 [2022-12-13 15:01:50,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 9550 transitions, 161937 flow. Second operand has 24 states, 24 states have (on average 94.375) internal successors, (2265), 24 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:01:50,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:01:50,099 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 286 [2022-12-13 15:01:50,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:03:42,625 INFO L130 PetriNetUnfolder]: 52612/76717 cut-off events. [2022-12-13 15:03:42,625 INFO L131 PetriNetUnfolder]: For 575831/575831 co-relation queries the response was YES. [2022-12-13 15:03:43,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 626392 conditions, 76717 events. 52612/76717 cut-off events. For 575831/575831 co-relation queries the response was YES. Maximal size of possible extension queue 3946. Compared 564727 event pairs, 470 based on Foata normal form. 99/76816 useless extension candidates. Maximal degree in co-relation 626267. Up to 26605 conditions per place. [2022-12-13 15:03:44,225 INFO L137 encePairwiseOnDemand]: 278/286 looper letters, 3875 selfloop transitions, 12013 changer transitions 301/16189 dead transitions. [2022-12-13 15:03:44,226 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 16189 transitions, 308871 flow [2022-12-13 15:03:44,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-12-13 15:03:44,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2022-12-13 15:03:44,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 7281 transitions. [2022-12-13 15:03:44,233 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3487403007950953 [2022-12-13 15:03:44,233 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 7281 transitions. [2022-12-13 15:03:44,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 7281 transitions. [2022-12-13 15:03:44,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:03:44,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 7281 transitions. [2022-12-13 15:03:44,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 99.73972602739725) internal successors, (7281), 73 states have internal predecessors, (7281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:03:44,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 286.0) internal successors, (21164), 74 states have internal predecessors, (21164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:03:44,255 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 286.0) internal successors, (21164), 74 states have internal predecessors, (21164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:03:44,255 INFO L175 Difference]: Start difference. First operand has 474 places, 9550 transitions, 161937 flow. Second operand 73 states and 7281 transitions. [2022-12-13 15:03:44,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 16189 transitions, 308871 flow [2022-12-13 15:07:19,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 16189 transitions, 293952 flow, removed 7020 selfloop flow, removed 10 redundant places. [2022-12-13 15:07:19,947 INFO L231 Difference]: Finished difference. Result has 577 places, 15318 transitions, 299335 flow [2022-12-13 15:07:19,951 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=155266, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6958, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2098, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=299335, PETRI_PLACES=577, PETRI_TRANSITIONS=15318} [2022-12-13 15:07:19,952 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 538 predicate places. [2022-12-13 15:07:19,952 INFO L495 AbstractCegarLoop]: Abstraction has has 577 places, 15318 transitions, 299335 flow [2022-12-13 15:07:19,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 94.375) internal successors, (2265), 24 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:19,952 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:07:19,952 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:07:19,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 15:07:20,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 15:07:20,154 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-12-13 15:07:20,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:07:20,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1555349668, now seen corresponding path program 9 times [2022-12-13 15:07:20,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:07:20,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451175730] [2022-12-13 15:07:20,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:07:20,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:07:20,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:07:20,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:07:20,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:07:20,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451175730] [2022-12-13 15:07:20,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451175730] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:07:20,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012995272] [2022-12-13 15:07:20,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:07:20,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:07:20,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:07:20,765 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:07:20,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcc21fc-6796-4c59-b00e-a62b51aeb5f7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 15:07:20,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 15:07:20,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:07:20,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 15:07:20,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:07:21,122 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:07:21,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:07:21,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:07:21,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012995272] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:07:21,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:07:21,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2022-12-13 15:07:21,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412902715] [2022-12-13 15:07:21,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:07:21,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 15:07:21,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:07:21,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 15:07:21,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2022-12-13 15:07:22,077 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 286 [2022-12-13 15:07:22,079 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 577 places, 15318 transitions, 299335 flow. Second operand has 27 states, 27 states have (on average 94.14814814814815) internal successors, (2542), 27 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:07:22,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:07:22,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 286 [2022-12-13 15:07:22,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand