./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.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_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/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_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/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_83758f8c-0d2c-458f-aa25-a01295726f05/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 e4c79b7a5b8db7237eb9e98d6143d48d2d4ec5b8465b95c5ccb44c5e387749db --- 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 19:07:57,928 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 19:07:57,930 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 19:07:57,949 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 19:07:57,950 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 19:07:57,951 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 19:07:57,952 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 19:07:57,953 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 19:07:57,955 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 19:07:57,956 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 19:07:57,957 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 19:07:57,958 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 19:07:57,958 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 19:07:57,959 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 19:07:57,961 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 19:07:57,962 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 19:07:57,963 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 19:07:57,964 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 19:07:57,965 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 19:07:57,967 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 19:07:57,968 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 19:07:57,970 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 19:07:57,971 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 19:07:57,972 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 19:07:57,975 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 19:07:57,975 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 19:07:57,976 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 19:07:57,977 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 19:07:57,977 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 19:07:57,978 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 19:07:57,978 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 19:07:57,979 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 19:07:57,980 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 19:07:57,980 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 19:07:57,981 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 19:07:57,982 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 19:07:57,982 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 19:07:57,982 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 19:07:57,983 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 19:07:57,983 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 19:07:57,984 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 19:07:57,985 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 19:07:57,998 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 19:07:57,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 19:07:57,999 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 19:07:57,999 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 19:07:57,999 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 19:07:57,999 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 19:07:58,000 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 19:07:58,000 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 19:07:58,000 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 19:07:58,000 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 19:07:58,000 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 19:07:58,000 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 19:07:58,001 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 19:07:58,001 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 19:07:58,001 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 19:07:58,001 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 19:07:58,001 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 19:07:58,001 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 19:07:58,001 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 19:07:58,001 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 19:07:58,001 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 19:07:58,002 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 19:07:58,002 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 19:07:58,002 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 19:07:58,002 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 19:07:58,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:07:58,002 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 19:07:58,002 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 19:07:58,002 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 19:07:58,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 19:07:58,003 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 19:07:58,003 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 19:07:58,003 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 19:07:58,003 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 19:07:58,003 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_83758f8c-0d2c-458f-aa25-a01295726f05/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4c79b7a5b8db7237eb9e98d6143d48d2d4ec5b8465b95c5ccb44c5e387749db [2022-12-13 19:07:58,160 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 19:07:58,177 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 19:07:58,180 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 19:07:58,181 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 19:07:58,181 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 19:07:58,182 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2022-12-13 19:08:00,833 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 19:08:00,976 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 19:08:00,977 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2022-12-13 19:08:00,982 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/data/4d9bb9b91/ed7cfccfbc7746acaffdd1af7dc70cb0/FLAG1db7f202a [2022-12-13 19:08:00,994 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/data/4d9bb9b91/ed7cfccfbc7746acaffdd1af7dc70cb0 [2022-12-13 19:08:00,997 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 19:08:00,998 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 19:08:01,000 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 19:08:01,000 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 19:08:01,003 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 19:08:01,003 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:08:00" (1/1) ... [2022-12-13 19:08:01,004 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3679e6e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:08:01, skipping insertion in model container [2022-12-13 19:08:01,004 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:08:00" (1/1) ... [2022-12-13 19:08:01,010 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 19:08:01,024 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 19:08:01,151 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:08:01,153 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:08:01,153 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:08:01,155 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:08:01,155 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:08:01,156 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:08:01,159 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:08:01,160 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:08:01,160 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:08:01,161 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:08:01,161 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:08:01,161 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:08:01,161 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:08:01,162 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:08:01,168 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_83758f8c-0d2c-458f-aa25-a01295726f05/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c[2476,2489] [2022-12-13 19:08:01,173 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:08:01,182 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 19:08:01,193 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:08:01,194 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:08:01,195 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:08:01,195 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:08:01,196 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:08:01,197 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:08:01,197 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:08:01,198 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:08:01,198 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:08:01,199 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:08:01,199 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:08:01,200 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:08:01,200 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:08:01,200 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:08:01,204 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_83758f8c-0d2c-458f-aa25-a01295726f05/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c[2476,2489] [2022-12-13 19:08:01,205 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:08:01,216 INFO L208 MainTranslator]: Completed translation [2022-12-13 19:08:01,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:08:01 WrapperNode [2022-12-13 19:08:01,217 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 19:08:01,217 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 19:08:01,218 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 19:08:01,218 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 19:08:01,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:08:01" (1/1) ... [2022-12-13 19:08:01,229 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:08:01" (1/1) ... [2022-12-13 19:08:01,245 INFO L138 Inliner]: procedures = 21, calls = 34, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2022-12-13 19:08:01,246 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 19:08:01,246 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 19:08:01,246 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 19:08:01,246 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 19:08:01,255 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:08:01" (1/1) ... [2022-12-13 19:08:01,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:08:01" (1/1) ... [2022-12-13 19:08:01,258 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:08:01" (1/1) ... [2022-12-13 19:08:01,258 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:08:01" (1/1) ... [2022-12-13 19:08:01,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:08:01" (1/1) ... [2022-12-13 19:08:01,267 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:08:01" (1/1) ... [2022-12-13 19:08:01,268 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:08:01" (1/1) ... [2022-12-13 19:08:01,269 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:08:01" (1/1) ... [2022-12-13 19:08:01,271 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 19:08:01,272 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 19:08:01,272 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 19:08:01,273 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 19:08:01,273 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:08:01" (1/1) ... [2022-12-13 19:08:01,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:08:01,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:08:01,300 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 19:08:01,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 19:08:01,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 19:08:01,336 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 19:08:01,336 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 19:08:01,336 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 19:08:01,336 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 19:08:01,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 19:08:01,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 19:08:01,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 19:08:01,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 19:08:01,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 19:08:01,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 19:08:01,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 19:08:01,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 19:08:01,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 19:08:01,339 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 19:08:01,420 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 19:08:01,422 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 19:08:01,604 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 19:08:01,657 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 19:08:01,658 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 19:08:01,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:08:01 BoogieIcfgContainer [2022-12-13 19:08:01,660 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 19:08:01,663 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 19:08:01,663 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 19:08:01,667 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 19:08:01,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 07:08:00" (1/3) ... [2022-12-13 19:08:01,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@152d0e3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:08:01, skipping insertion in model container [2022-12-13 19:08:01,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:08:01" (2/3) ... [2022-12-13 19:08:01,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@152d0e3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:08:01, skipping insertion in model container [2022-12-13 19:08:01,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:08:01" (3/3) ... [2022-12-13 19:08:01,670 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2022-12-13 19:08:01,685 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 19:08:01,685 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-12-13 19:08:01,685 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 19:08:01,751 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 19:08:01,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 100 transitions, 216 flow [2022-12-13 19:08:01,832 INFO L130 PetriNetUnfolder]: 6/98 cut-off events. [2022-12-13 19:08:01,832 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 19:08:01,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 98 events. 6/98 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 66 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 57. Up to 2 conditions per place. [2022-12-13 19:08:01,836 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 100 transitions, 216 flow [2022-12-13 19:08:01,841 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 93 transitions, 198 flow [2022-12-13 19:08:01,844 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 19:08:01,855 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 94 places, 93 transitions, 198 flow [2022-12-13 19:08:01,858 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 94 places, 93 transitions, 198 flow [2022-12-13 19:08:01,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 93 transitions, 198 flow [2022-12-13 19:08:01,885 INFO L130 PetriNetUnfolder]: 6/93 cut-off events. [2022-12-13 19:08:01,886 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 19:08:01,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 93 events. 6/93 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 65 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 57. Up to 2 conditions per place. [2022-12-13 19:08:01,888 INFO L119 LiptonReduction]: Number of co-enabled transitions 532 [2022-12-13 19:08:04,431 INFO L134 LiptonReduction]: Checked pairs total: 950 [2022-12-13 19:08:04,431 INFO L136 LiptonReduction]: Total number of compositions: 95 [2022-12-13 19:08:04,441 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 19:08:04,446 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;@6ab1be9e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 19:08:04,446 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-12-13 19:08:04,447 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-12-13 19:08:04,447 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:08:04,447 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:08:04,447 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-12-13 19:08:04,448 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 19:08:04,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:08:04,451 INFO L85 PathProgramCache]: Analyzing trace with hash 397, now seen corresponding path program 1 times [2022-12-13 19:08:04,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:08:04,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795343973] [2022-12-13 19:08:04,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:08:04,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:08:04,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:08:04,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:08:04,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:08:04,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795343973] [2022-12-13 19:08:04,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795343973] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:08:04,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:08:04,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-13 19:08:04,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593142443] [2022-12-13 19:08:04,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:08:04,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 19:08:04,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:08:04,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 19:08:04,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 19:08:04,550 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 195 [2022-12-13 19:08:04,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 64 flow. Second operand has 2 states, 2 states have (on average 88.5) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 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 19:08:04,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:08:04,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 195 [2022-12-13 19:08:04,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:08:04,609 INFO L130 PetriNetUnfolder]: 96/176 cut-off events. [2022-12-13 19:08:04,609 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 19:08:04,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 176 events. 96/176 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 724 event pairs, 66 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 273. Up to 172 conditions per place. [2022-12-13 19:08:04,612 INFO L137 encePairwiseOnDemand]: 192/195 looper letters, 20 selfloop transitions, 0 changer transitions 0/23 dead transitions. [2022-12-13 19:08:04,612 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 23 transitions, 98 flow [2022-12-13 19:08:04,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 19:08:04,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 19:08:04,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 199 transitions. [2022-12-13 19:08:04,622 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5102564102564102 [2022-12-13 19:08:04,622 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 199 transitions. [2022-12-13 19:08:04,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 199 transitions. [2022-12-13 19:08:04,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:08:04,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 199 transitions. [2022-12-13 19:08:04,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 99.5) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 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 19:08:04,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 0 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 19:08:04,630 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 0 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 19:08:04,632 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 64 flow. Second operand 2 states and 199 transitions. [2022-12-13 19:08:04,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 23 transitions, 98 flow [2022-12-13 19:08:04,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 23 transitions, 90 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 19:08:04,635 INFO L231 Difference]: Finished difference. Result has 25 places, 23 transitions, 50 flow [2022-12-13 19:08:04,636 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=50, PETRI_PLACES=25, PETRI_TRANSITIONS=23} [2022-12-13 19:08:04,639 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, -6 predicate places. [2022-12-13 19:08:04,639 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 23 transitions, 50 flow [2022-12-13 19:08:04,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 88.5) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 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 19:08:04,640 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:08:04,640 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 19:08:04,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 19:08:04,640 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 19:08:04,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:08:04,641 INFO L85 PathProgramCache]: Analyzing trace with hash 391189, now seen corresponding path program 1 times [2022-12-13 19:08:04,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:08:04,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293237486] [2022-12-13 19:08:04,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:08:04,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:08:04,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:08:04,775 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 19:08:04,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:08:04,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293237486] [2022-12-13 19:08:04,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293237486] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:08:04,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:08:04,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:08:04,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364239382] [2022-12-13 19:08:04,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:08:04,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:08:04,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:08:04,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:08:04,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:08:04,811 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 195 [2022-12-13 19:08:04,811 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 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 19:08:04,812 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:08:04,812 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 195 [2022-12-13 19:08:04,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:08:04,855 INFO L130 PetriNetUnfolder]: 89/162 cut-off events. [2022-12-13 19:08:04,855 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 19:08:04,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 326 conditions, 162 events. 89/162 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 646 event pairs, 61 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 323. Up to 157 conditions per place. [2022-12-13 19:08:04,856 INFO L137 encePairwiseOnDemand]: 192/195 looper letters, 17 selfloop transitions, 1 changer transitions 0/21 dead transitions. [2022-12-13 19:08:04,856 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 21 transitions, 82 flow [2022-12-13 19:08:04,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:08:04,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:08:04,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2022-12-13 19:08:04,858 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4598290598290598 [2022-12-13 19:08:04,858 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 269 transitions. [2022-12-13 19:08:04,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 269 transitions. [2022-12-13 19:08:04,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:08:04,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 269 transitions. [2022-12-13 19:08:04,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 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 19:08:04,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 0 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 19:08:04,861 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 0 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 19:08:04,861 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 50 flow. Second operand 3 states and 269 transitions. [2022-12-13 19:08:04,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 21 transitions, 82 flow [2022-12-13 19:08:04,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 21 transitions, 82 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 19:08:04,861 INFO L231 Difference]: Finished difference. Result has 25 places, 21 transitions, 48 flow [2022-12-13 19:08:04,862 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, 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=48, PETRI_PLACES=25, PETRI_TRANSITIONS=21} [2022-12-13 19:08:04,862 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, -6 predicate places. [2022-12-13 19:08:04,862 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 21 transitions, 48 flow [2022-12-13 19:08:04,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 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 19:08:04,862 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:08:04,862 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 19:08:04,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 19:08:04,863 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 19:08:04,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:08:04,863 INFO L85 PathProgramCache]: Analyzing trace with hash 391188, now seen corresponding path program 1 times [2022-12-13 19:08:04,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:08:04,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602338174] [2022-12-13 19:08:04,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:08:04,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:08:04,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:08:04,915 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 19:08:04,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:08:04,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602338174] [2022-12-13 19:08:04,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602338174] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:08:04,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:08:04,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:08:04,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732100001] [2022-12-13 19:08:04,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:08:04,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:08:04,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:08:04,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:08:04,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:08:04,957 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 195 [2022-12-13 19:08:04,958 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 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 19:08:04,958 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:08:04,958 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 195 [2022-12-13 19:08:04,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:08:04,991 INFO L130 PetriNetUnfolder]: 82/148 cut-off events. [2022-12-13 19:08:04,991 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 19:08:04,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 148 events. 82/148 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 575 event pairs, 56 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 296. Up to 143 conditions per place. [2022-12-13 19:08:04,992 INFO L137 encePairwiseOnDemand]: 192/195 looper letters, 15 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2022-12-13 19:08:04,992 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 19 transitions, 76 flow [2022-12-13 19:08:04,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:08:04,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:08:04,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 255 transitions. [2022-12-13 19:08:04,995 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4358974358974359 [2022-12-13 19:08:04,995 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 255 transitions. [2022-12-13 19:08:04,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 255 transitions. [2022-12-13 19:08:04,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:08:04,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 255 transitions. [2022-12-13 19:08:04,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 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 19:08:04,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 0 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 19:08:04,998 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 0 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 19:08:04,998 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 48 flow. Second operand 3 states and 255 transitions. [2022-12-13 19:08:04,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 19 transitions, 76 flow [2022-12-13 19:08:04,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 19 transitions, 75 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:08:04,999 INFO L231 Difference]: Finished difference. Result has 24 places, 19 transitions, 45 flow [2022-12-13 19:08:04,999 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=43, PETRI_DIFFERENCE_MINUEND_PLACES=22, 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=45, PETRI_PLACES=24, PETRI_TRANSITIONS=19} [2022-12-13 19:08:05,000 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, -7 predicate places. [2022-12-13 19:08:05,000 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 19 transitions, 45 flow [2022-12-13 19:08:05,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 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 19:08:05,000 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:08:05,000 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 19:08:05,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 19:08:05,001 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 19:08:05,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:08:05,001 INFO L85 PathProgramCache]: Analyzing trace with hash 375942224, now seen corresponding path program 1 times [2022-12-13 19:08:05,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:08:05,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460381793] [2022-12-13 19:08:05,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:08:05,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:08:05,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:08:05,085 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 19:08:05,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:08:05,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460381793] [2022-12-13 19:08:05,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460381793] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:08:05,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:08:05,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:08:05,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790339931] [2022-12-13 19:08:05,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:08:05,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:08:05,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:08:05,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:08:05,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:08:05,133 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 195 [2022-12-13 19:08:05,134 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 19 transitions, 45 flow. Second operand has 4 states, 4 states have (on average 76.25) internal successors, (305), 4 states have internal predecessors, (305), 0 states have call successors, (0), 0 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 19:08:05,134 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:08:05,134 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 195 [2022-12-13 19:08:05,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:08:05,167 INFO L130 PetriNetUnfolder]: 62/116 cut-off events. [2022-12-13 19:08:05,167 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 19:08:05,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237 conditions, 116 events. 62/116 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 403 event pairs, 42 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 233. Up to 111 conditions per place. [2022-12-13 19:08:05,168 INFO L137 encePairwiseOnDemand]: 193/195 looper letters, 14 selfloop transitions, 1 changer transitions 0/18 dead transitions. [2022-12-13 19:08:05,169 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 18 transitions, 73 flow [2022-12-13 19:08:05,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:08:05,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:08:05,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 241 transitions. [2022-12-13 19:08:05,170 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41196581196581195 [2022-12-13 19:08:05,170 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 241 transitions. [2022-12-13 19:08:05,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 241 transitions. [2022-12-13 19:08:05,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:08:05,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 241 transitions. [2022-12-13 19:08:05,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 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 19:08:05,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 0 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 19:08:05,173 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 0 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 19:08:05,173 INFO L175 Difference]: Start difference. First operand has 24 places, 19 transitions, 45 flow. Second operand 3 states and 241 transitions. [2022-12-13 19:08:05,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 18 transitions, 73 flow [2022-12-13 19:08:05,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:08:05,174 INFO L231 Difference]: Finished difference. Result has 24 places, 18 transitions, 44 flow [2022-12-13 19:08:05,174 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=24, PETRI_TRANSITIONS=18} [2022-12-13 19:08:05,175 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, -7 predicate places. [2022-12-13 19:08:05,175 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 18 transitions, 44 flow [2022-12-13 19:08:05,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.25) internal successors, (305), 4 states have internal predecessors, (305), 0 states have call successors, (0), 0 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 19:08:05,176 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:08:05,176 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 19:08:05,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 19:08:05,176 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 19:08:05,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:08:05,176 INFO L85 PathProgramCache]: Analyzing trace with hash 375942223, now seen corresponding path program 1 times [2022-12-13 19:08:05,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:08:05,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522742417] [2022-12-13 19:08:05,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:08:05,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:08:05,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:08:05,267 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 19:08:05,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:08:05,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522742417] [2022-12-13 19:08:05,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522742417] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:08:05,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:08:05,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:08:05,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120892474] [2022-12-13 19:08:05,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:08:05,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:08:05,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:08:05,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:08:05,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:08:05,309 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 195 [2022-12-13 19:08:05,309 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 18 transitions, 44 flow. Second operand has 4 states, 4 states have (on average 80.25) internal successors, (321), 4 states have internal predecessors, (321), 0 states have call successors, (0), 0 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 19:08:05,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:08:05,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 195 [2022-12-13 19:08:05,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:08:05,337 INFO L130 PetriNetUnfolder]: 42/84 cut-off events. [2022-12-13 19:08:05,337 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 19:08:05,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 84 events. 42/84 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 259 event pairs, 28 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 170. Up to 79 conditions per place. [2022-12-13 19:08:05,337 INFO L137 encePairwiseOnDemand]: 193/195 looper letters, 13 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2022-12-13 19:08:05,338 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 17 transitions, 70 flow [2022-12-13 19:08:05,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:08:05,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:08:05,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 252 transitions. [2022-12-13 19:08:05,339 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4307692307692308 [2022-12-13 19:08:05,339 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 252 transitions. [2022-12-13 19:08:05,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 252 transitions. [2022-12-13 19:08:05,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:08:05,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 252 transitions. [2022-12-13 19:08:05,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 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 19:08:05,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 0 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 19:08:05,341 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 0 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 19:08:05,341 INFO L175 Difference]: Start difference. First operand has 24 places, 18 transitions, 44 flow. Second operand 3 states and 252 transitions. [2022-12-13 19:08:05,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 17 transitions, 70 flow [2022-12-13 19:08:05,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:08:05,342 INFO L231 Difference]: Finished difference. Result has 24 places, 17 transitions, 43 flow [2022-12-13 19:08:05,342 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=41, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=43, PETRI_PLACES=24, PETRI_TRANSITIONS=17} [2022-12-13 19:08:05,342 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, -7 predicate places. [2022-12-13 19:08:05,342 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 17 transitions, 43 flow [2022-12-13 19:08:05,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.25) internal successors, (321), 4 states have internal predecessors, (321), 0 states have call successors, (0), 0 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 19:08:05,343 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:08:05,343 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:08:05,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 19:08:05,343 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 19:08:05,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:08:05,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1432206748, now seen corresponding path program 1 times [2022-12-13 19:08:05,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:08:05,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353987733] [2022-12-13 19:08:05,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:08:05,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:08:05,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:08:05,544 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 19:08:05,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:08:05,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353987733] [2022-12-13 19:08:05,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353987733] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:08:05,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:08:05,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:08:05,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646164339] [2022-12-13 19:08:05,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:08:05,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:08:05,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:08:05,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:08:05,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:08:05,586 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 195 [2022-12-13 19:08:05,587 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 17 transitions, 43 flow. Second operand has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 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 19:08:05,587 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:08:05,587 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 195 [2022-12-13 19:08:05,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:08:05,659 INFO L130 PetriNetUnfolder]: 109/185 cut-off events. [2022-12-13 19:08:05,659 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:08:05,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 384 conditions, 185 events. 109/185 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 573 event pairs, 9 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 380. Up to 126 conditions per place. [2022-12-13 19:08:05,661 INFO L137 encePairwiseOnDemand]: 189/195 looper letters, 30 selfloop transitions, 6 changer transitions 0/37 dead transitions. [2022-12-13 19:08:05,661 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 37 transitions, 158 flow [2022-12-13 19:08:05,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:08:05,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:08:05,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 433 transitions. [2022-12-13 19:08:05,663 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4441025641025641 [2022-12-13 19:08:05,663 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 433 transitions. [2022-12-13 19:08:05,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 433 transitions. [2022-12-13 19:08:05,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:08:05,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 433 transitions. [2022-12-13 19:08:05,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 86.6) internal successors, (433), 5 states have internal predecessors, (433), 0 states have call successors, (0), 0 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 19:08:05,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 195.0) internal successors, (1170), 6 states have internal predecessors, (1170), 0 states have call successors, (0), 0 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 19:08:05,667 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 195.0) internal successors, (1170), 6 states have internal predecessors, (1170), 0 states have call successors, (0), 0 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 19:08:05,667 INFO L175 Difference]: Start difference. First operand has 24 places, 17 transitions, 43 flow. Second operand 5 states and 433 transitions. [2022-12-13 19:08:05,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 37 transitions, 158 flow [2022-12-13 19:08:05,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 37 transitions, 157 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:08:05,668 INFO L231 Difference]: Finished difference. Result has 30 places, 22 transitions, 87 flow [2022-12-13 19:08:05,668 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=87, PETRI_PLACES=30, PETRI_TRANSITIONS=22} [2022-12-13 19:08:05,669 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, -1 predicate places. [2022-12-13 19:08:05,669 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 22 transitions, 87 flow [2022-12-13 19:08:05,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 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 19:08:05,669 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:08:05,669 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:08:05,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 19:08:05,670 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 19:08:05,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:08:05,670 INFO L85 PathProgramCache]: Analyzing trace with hash 993494913, now seen corresponding path program 1 times [2022-12-13 19:08:05,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:08:05,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913418264] [2022-12-13 19:08:05,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:08:05,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:08:05,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:08:05,822 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 19:08:05,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:08:05,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913418264] [2022-12-13 19:08:05,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913418264] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:08:05,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:08:05,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:08:05,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45488601] [2022-12-13 19:08:05,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:08:05,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:08:05,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:08:05,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:08:05,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:08:05,841 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 195 [2022-12-13 19:08:05,842 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 22 transitions, 87 flow. Second operand has 4 states, 4 states have (on average 86.25) internal successors, (345), 4 states have internal predecessors, (345), 0 states have call successors, (0), 0 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 19:08:05,842 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:08:05,842 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 195 [2022-12-13 19:08:05,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:08:05,899 INFO L130 PetriNetUnfolder]: 106/191 cut-off events. [2022-12-13 19:08:05,899 INFO L131 PetriNetUnfolder]: For 127/137 co-relation queries the response was YES. [2022-12-13 19:08:05,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539 conditions, 191 events. 106/191 cut-off events. For 127/137 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 695 event pairs, 11 based on Foata normal form. 20/206 useless extension candidates. Maximal degree in co-relation 532. Up to 104 conditions per place. [2022-12-13 19:08:05,902 INFO L137 encePairwiseOnDemand]: 191/195 looper letters, 28 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2022-12-13 19:08:05,902 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 35 transitions, 197 flow [2022-12-13 19:08:05,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:08:05,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 19:08:05,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 360 transitions. [2022-12-13 19:08:05,903 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2022-12-13 19:08:05,903 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 360 transitions. [2022-12-13 19:08:05,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 360 transitions. [2022-12-13 19:08:05,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:08:05,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 360 transitions. [2022-12-13 19:08:05,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 0 states have call successors, (0), 0 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 19:08:05,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 195.0) internal successors, (975), 5 states have internal predecessors, (975), 0 states have call successors, (0), 0 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 19:08:05,905 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 195.0) internal successors, (975), 5 states have internal predecessors, (975), 0 states have call successors, (0), 0 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 19:08:05,905 INFO L175 Difference]: Start difference. First operand has 30 places, 22 transitions, 87 flow. Second operand 4 states and 360 transitions. [2022-12-13 19:08:05,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 35 transitions, 197 flow [2022-12-13 19:08:05,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 35 transitions, 194 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:08:05,907 INFO L231 Difference]: Finished difference. Result has 33 places, 23 transitions, 98 flow [2022-12-13 19:08:05,907 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=33, PETRI_TRANSITIONS=23} [2022-12-13 19:08:05,907 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 2 predicate places. [2022-12-13 19:08:05,907 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 23 transitions, 98 flow [2022-12-13 19:08:05,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.25) internal successors, (345), 4 states have internal predecessors, (345), 0 states have call successors, (0), 0 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 19:08:05,908 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:08:05,908 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:08:05,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 19:08:05,908 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 19:08:05,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:08:05,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1368478100, now seen corresponding path program 1 times [2022-12-13 19:08:05,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:08:05,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006150465] [2022-12-13 19:08:05,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:08:05,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:08:05,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:08:06,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:08:06,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:08:06,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006150465] [2022-12-13 19:08:06,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006150465] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:08:06,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:08:06,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 19:08:06,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007674316] [2022-12-13 19:08:06,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:08:06,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:08:06,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:08:06,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:08:06,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:08:06,105 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 195 [2022-12-13 19:08:06,106 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 23 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:08:06,106 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:08:06,106 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 195 [2022-12-13 19:08:06,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:08:06,251 INFO L130 PetriNetUnfolder]: 134/231 cut-off events. [2022-12-13 19:08:06,251 INFO L131 PetriNetUnfolder]: For 163/163 co-relation queries the response was YES. [2022-12-13 19:08:06,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 708 conditions, 231 events. 134/231 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 711 event pairs, 8 based on Foata normal form. 14/245 useless extension candidates. Maximal degree in co-relation 700. Up to 68 conditions per place. [2022-12-13 19:08:06,252 INFO L137 encePairwiseOnDemand]: 188/195 looper letters, 37 selfloop transitions, 15 changer transitions 0/52 dead transitions. [2022-12-13 19:08:06,252 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 52 transitions, 314 flow [2022-12-13 19:08:06,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 19:08:06,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 19:08:06,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 686 transitions. [2022-12-13 19:08:06,254 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43974358974358974 [2022-12-13 19:08:06,254 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 686 transitions. [2022-12-13 19:08:06,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 686 transitions. [2022-12-13 19:08:06,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:08:06,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 686 transitions. [2022-12-13 19:08:06,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 85.75) internal successors, (686), 8 states have internal predecessors, (686), 0 states have call successors, (0), 0 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 19:08:06,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 195.0) internal successors, (1755), 9 states have internal predecessors, (1755), 0 states have call successors, (0), 0 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 19:08:06,257 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 195.0) internal successors, (1755), 9 states have internal predecessors, (1755), 0 states have call successors, (0), 0 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 19:08:06,257 INFO L175 Difference]: Start difference. First operand has 33 places, 23 transitions, 98 flow. Second operand 8 states and 686 transitions. [2022-12-13 19:08:06,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 52 transitions, 314 flow [2022-12-13 19:08:06,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 52 transitions, 308 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 19:08:06,259 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 207 flow [2022-12-13 19:08:06,259 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=207, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2022-12-13 19:08:06,259 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 11 predicate places. [2022-12-13 19:08:06,259 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 207 flow [2022-12-13 19:08:06,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:08:06,259 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:08:06,259 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:08:06,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 19:08:06,260 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 19:08:06,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:08:06,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1124478658, now seen corresponding path program 2 times [2022-12-13 19:08:06,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:08:06,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878147253] [2022-12-13 19:08:06,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:08:06,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:08:06,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:08:06,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:08:06,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:08:06,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878147253] [2022-12-13 19:08:06,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878147253] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:08:06,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440105930] [2022-12-13 19:08:06,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:08:06,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:08:06,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:08:06,801 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:08:06,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 19:08:06,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:08:06,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:08:06,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 19:08:06,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:08:07,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:08:07,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:08:07,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:08:07,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440105930] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:08:07,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:08:07,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2022-12-13 19:08:07,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349520356] [2022-12-13 19:08:07,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:08:07,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 19:08:07,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:08:07,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 19:08:07,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-12-13 19:08:08,056 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 195 [2022-12-13 19:08:08,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 207 flow. Second operand has 22 states, 22 states have (on average 73.04545454545455) internal successors, (1607), 22 states have internal predecessors, (1607), 0 states have call successors, (0), 0 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 19:08:08,057 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:08:08,057 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 195 [2022-12-13 19:08:08,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:08:10,951 INFO L130 PetriNetUnfolder]: 451/810 cut-off events. [2022-12-13 19:08:10,951 INFO L131 PetriNetUnfolder]: For 1490/1490 co-relation queries the response was YES. [2022-12-13 19:08:10,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3079 conditions, 810 events. 451/810 cut-off events. For 1490/1490 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3729 event pairs, 4 based on Foata normal form. 8/818 useless extension candidates. Maximal degree in co-relation 3067. Up to 273 conditions per place. [2022-12-13 19:08:10,955 INFO L137 encePairwiseOnDemand]: 184/195 looper letters, 107 selfloop transitions, 130 changer transitions 37/274 dead transitions. [2022-12-13 19:08:10,955 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 274 transitions, 2033 flow [2022-12-13 19:08:10,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-13 19:08:10,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-12-13 19:08:10,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3359 transitions. [2022-12-13 19:08:10,961 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3914918414918415 [2022-12-13 19:08:10,961 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3359 transitions. [2022-12-13 19:08:10,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3359 transitions. [2022-12-13 19:08:10,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:08:10,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3359 transitions. [2022-12-13 19:08:10,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 76.3409090909091) internal successors, (3359), 44 states have internal predecessors, (3359), 0 states have call successors, (0), 0 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 19:08:10,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 195.0) internal successors, (8775), 45 states have internal predecessors, (8775), 0 states have call successors, (0), 0 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 19:08:10,976 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 195.0) internal successors, (8775), 45 states have internal predecessors, (8775), 0 states have call successors, (0), 0 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 19:08:10,976 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 207 flow. Second operand 44 states and 3359 transitions. [2022-12-13 19:08:10,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 274 transitions, 2033 flow [2022-12-13 19:08:10,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 274 transitions, 2006 flow, removed 13 selfloop flow, removed 1 redundant places. [2022-12-13 19:08:10,983 INFO L231 Difference]: Finished difference. Result has 100 places, 152 transitions, 1358 flow [2022-12-13 19:08:10,983 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=1358, PETRI_PLACES=100, PETRI_TRANSITIONS=152} [2022-12-13 19:08:10,983 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 69 predicate places. [2022-12-13 19:08:10,984 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 152 transitions, 1358 flow [2022-12-13 19:08:10,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 73.04545454545455) internal successors, (1607), 22 states have internal predecessors, (1607), 0 states have call successors, (0), 0 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 19:08:10,984 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:08:10,984 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 19:08:10,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 19:08:11,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:08:11,185 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 19:08:11,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:08:11,185 INFO L85 PathProgramCache]: Analyzing trace with hash -192392439, now seen corresponding path program 1 times [2022-12-13 19:08:11,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:08:11,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897962389] [2022-12-13 19:08:11,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:08:11,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:08:11,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:08:11,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:08:11,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:08:11,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897962389] [2022-12-13 19:08:11,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897962389] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:08:11,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380173940] [2022-12-13 19:08:11,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:08:11,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:08:11,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:08:11,355 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:08:11,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 19:08:11,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:08:11,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 19:08:11,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:08:11,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:08:11,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:08:11,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:08:11,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380173940] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:08:11,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:08:11,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 10 [2022-12-13 19:08:11,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501960752] [2022-12-13 19:08:11,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:08:11,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:08:11,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:08:11,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:08:11,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-12-13 19:08:11,667 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 195 [2022-12-13 19:08:11,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 152 transitions, 1358 flow. Second operand has 10 states, 10 states have (on average 81.4) internal successors, (814), 10 states have internal predecessors, (814), 0 states have call successors, (0), 0 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 19:08:11,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:08:11,668 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 195 [2022-12-13 19:08:11,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:08:11,973 INFO L130 PetriNetUnfolder]: 670/1184 cut-off events. [2022-12-13 19:08:11,973 INFO L131 PetriNetUnfolder]: For 7160/7160 co-relation queries the response was YES. [2022-12-13 19:08:11,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5890 conditions, 1184 events. 670/1184 cut-off events. For 7160/7160 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 5939 event pairs, 14 based on Foata normal form. 14/1198 useless extension candidates. Maximal degree in co-relation 5862. Up to 393 conditions per place. [2022-12-13 19:08:11,981 INFO L137 encePairwiseOnDemand]: 189/195 looper letters, 168 selfloop transitions, 156 changer transitions 0/330 dead transitions. [2022-12-13 19:08:11,981 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 330 transitions, 3485 flow [2022-12-13 19:08:11,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 19:08:11,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 19:08:11,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1019 transitions. [2022-12-13 19:08:11,983 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4354700854700855 [2022-12-13 19:08:11,983 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1019 transitions. [2022-12-13 19:08:11,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1019 transitions. [2022-12-13 19:08:11,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:08:11,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1019 transitions. [2022-12-13 19:08:11,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 84.91666666666667) internal successors, (1019), 12 states have internal predecessors, (1019), 0 states have call successors, (0), 0 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 19:08:11,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 195.0) internal successors, (2535), 13 states have internal predecessors, (2535), 0 states have call successors, (0), 0 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 19:08:11,990 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 195.0) internal successors, (2535), 13 states have internal predecessors, (2535), 0 states have call successors, (0), 0 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 19:08:11,990 INFO L175 Difference]: Start difference. First operand has 100 places, 152 transitions, 1358 flow. Second operand 12 states and 1019 transitions. [2022-12-13 19:08:11,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 330 transitions, 3485 flow [2022-12-13 19:08:12,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 330 transitions, 3069 flow, removed 200 selfloop flow, removed 8 redundant places. [2022-12-13 19:08:12,023 INFO L231 Difference]: Finished difference. Result has 103 places, 255 transitions, 2482 flow [2022-12-13 19:08:12,023 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=1152, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2482, PETRI_PLACES=103, PETRI_TRANSITIONS=255} [2022-12-13 19:08:12,024 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 72 predicate places. [2022-12-13 19:08:12,024 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 255 transitions, 2482 flow [2022-12-13 19:08:12,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 81.4) internal successors, (814), 10 states have internal predecessors, (814), 0 states have call successors, (0), 0 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 19:08:12,024 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:08:12,024 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 19:08:12,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 19:08:12,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 19:08:12,225 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 19:08:12,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:08:12,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1433874673, now seen corresponding path program 2 times [2022-12-13 19:08:12,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:08:12,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885542593] [2022-12-13 19:08:12,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:08:12,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:08:12,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:08:12,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:08:12,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:08:12,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885542593] [2022-12-13 19:08:12,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885542593] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:08:12,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446305329] [2022-12-13 19:08:12,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:08:12,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:08:12,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:08:12,728 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:08:12,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 19:08:12,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:08:12,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:08:12,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 19:08:12,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:08:13,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:08:13,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:08:13,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:08:13,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446305329] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:08:13,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:08:13,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2022-12-13 19:08:13,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282945250] [2022-12-13 19:08:13,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:08:13,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 19:08:13,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:08:13,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 19:08:13,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-12-13 19:08:14,525 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 195 [2022-12-13 19:08:14,526 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 255 transitions, 2482 flow. Second operand has 19 states, 19 states have (on average 77.21052631578948) internal successors, (1467), 19 states have internal predecessors, (1467), 0 states have call successors, (0), 0 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 19:08:14,526 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:08:14,526 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 195 [2022-12-13 19:08:14,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:08:20,477 INFO L130 PetriNetUnfolder]: 1164/2045 cut-off events. [2022-12-13 19:08:20,477 INFO L131 PetriNetUnfolder]: For 15052/15052 co-relation queries the response was YES. [2022-12-13 19:08:20,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10728 conditions, 2045 events. 1164/2045 cut-off events. For 15052/15052 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 11462 event pairs, 42 based on Foata normal form. 13/2058 useless extension candidates. Maximal degree in co-relation 10699. Up to 586 conditions per place. [2022-12-13 19:08:20,489 INFO L137 encePairwiseOnDemand]: 187/195 looper letters, 202 selfloop transitions, 292 changer transitions 71/571 dead transitions. [2022-12-13 19:08:20,489 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 571 transitions, 6293 flow [2022-12-13 19:08:20,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-13 19:08:20,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-12-13 19:08:20,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3593 transitions. [2022-12-13 19:08:20,494 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40945868945868946 [2022-12-13 19:08:20,494 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3593 transitions. [2022-12-13 19:08:20,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3593 transitions. [2022-12-13 19:08:20,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:08:20,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3593 transitions. [2022-12-13 19:08:20,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 79.84444444444445) internal successors, (3593), 45 states have internal predecessors, (3593), 0 states have call successors, (0), 0 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 19:08:20,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 195.0) internal successors, (8970), 46 states have internal predecessors, (8970), 0 states have call successors, (0), 0 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 19:08:20,509 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 195.0) internal successors, (8970), 46 states have internal predecessors, (8970), 0 states have call successors, (0), 0 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 19:08:20,509 INFO L175 Difference]: Start difference. First operand has 103 places, 255 transitions, 2482 flow. Second operand 45 states and 3593 transitions. [2022-12-13 19:08:20,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 571 transitions, 6293 flow [2022-12-13 19:08:20,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 571 transitions, 6070 flow, removed 107 selfloop flow, removed 2 redundant places. [2022-12-13 19:08:20,551 INFO L231 Difference]: Finished difference. Result has 175 places, 408 transitions, 4957 flow [2022-12-13 19:08:20,551 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=2383, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=4957, PETRI_PLACES=175, PETRI_TRANSITIONS=408} [2022-12-13 19:08:20,551 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 144 predicate places. [2022-12-13 19:08:20,552 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 408 transitions, 4957 flow [2022-12-13 19:08:20,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 77.21052631578948) internal successors, (1467), 19 states have internal predecessors, (1467), 0 states have call successors, (0), 0 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 19:08:20,552 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:08:20,552 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 19:08:20,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 19:08:20,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:08:20,753 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 19:08:20,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:08:20,754 INFO L85 PathProgramCache]: Analyzing trace with hash 342676791, now seen corresponding path program 3 times [2022-12-13 19:08:20,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:08:20,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604848016] [2022-12-13 19:08:20,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:08:20,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:08:20,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:08:21,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:08:21,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:08:21,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604848016] [2022-12-13 19:08:21,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604848016] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:08:21,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700717221] [2022-12-13 19:08:21,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:08:21,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:08:21,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:08:21,448 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:08:21,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 19:08:21,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 19:08:21,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:08:21,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 19:08:21,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:08:21,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:08:21,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:08:22,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:08:22,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700717221] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:08:22,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:08:22,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 18 [2022-12-13 19:08:22,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155707239] [2022-12-13 19:08:22,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:08:22,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 19:08:22,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:08:22,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 19:08:22,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-12-13 19:08:23,019 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 195 [2022-12-13 19:08:23,023 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 408 transitions, 4957 flow. Second operand has 20 states, 20 states have (on average 73.35) internal successors, (1467), 20 states have internal predecessors, (1467), 0 states have call successors, (0), 0 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 19:08:23,023 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:08:23,023 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 195 [2022-12-13 19:08:23,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:08:36,926 INFO L130 PetriNetUnfolder]: 1494/2591 cut-off events. [2022-12-13 19:08:36,926 INFO L131 PetriNetUnfolder]: For 30972/30972 co-relation queries the response was YES. [2022-12-13 19:08:36,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15995 conditions, 2591 events. 1494/2591 cut-off events. For 30972/30972 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 14980 event pairs, 36 based on Foata normal form. 18/2609 useless extension candidates. Maximal degree in co-relation 15935. Up to 737 conditions per place. [2022-12-13 19:08:36,943 INFO L137 encePairwiseOnDemand]: 185/195 looper letters, 219 selfloop transitions, 435 changer transitions 90/744 dead transitions. [2022-12-13 19:08:36,943 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 744 transitions, 9943 flow [2022-12-13 19:08:36,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-12-13 19:08:36,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-12-13 19:08:36,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 4320 transitions. [2022-12-13 19:08:36,948 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38866396761133604 [2022-12-13 19:08:36,948 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 4320 transitions. [2022-12-13 19:08:36,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 4320 transitions. [2022-12-13 19:08:36,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:08:36,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 4320 transitions. [2022-12-13 19:08:36,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 75.78947368421052) internal successors, (4320), 57 states have internal predecessors, (4320), 0 states have call successors, (0), 0 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 19:08:36,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 195.0) internal successors, (11310), 58 states have internal predecessors, (11310), 0 states have call successors, (0), 0 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 19:08:36,964 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 195.0) internal successors, (11310), 58 states have internal predecessors, (11310), 0 states have call successors, (0), 0 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 19:08:36,964 INFO L175 Difference]: Start difference. First operand has 175 places, 408 transitions, 4957 flow. Second operand 57 states and 4320 transitions. [2022-12-13 19:08:36,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 744 transitions, 9943 flow [2022-12-13 19:08:37,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 744 transitions, 9622 flow, removed 107 selfloop flow, removed 17 redundant places. [2022-12-13 19:08:37,083 INFO L231 Difference]: Finished difference. Result has 237 places, 556 transitions, 8155 flow [2022-12-13 19:08:37,083 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=4753, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=295, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=8155, PETRI_PLACES=237, PETRI_TRANSITIONS=556} [2022-12-13 19:08:37,083 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 206 predicate places. [2022-12-13 19:08:37,083 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 556 transitions, 8155 flow [2022-12-13 19:08:37,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 73.35) internal successors, (1467), 20 states have internal predecessors, (1467), 0 states have call successors, (0), 0 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 19:08:37,084 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:08:37,084 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:08:37,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-13 19:08:37,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:08:37,286 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 19:08:37,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:08:37,287 INFO L85 PathProgramCache]: Analyzing trace with hash -562263857, now seen corresponding path program 4 times [2022-12-13 19:08:37,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:08:37,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432203662] [2022-12-13 19:08:37,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:08:37,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:08:37,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:08:38,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:08:38,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:08:38,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432203662] [2022-12-13 19:08:38,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432203662] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:08:38,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594620803] [2022-12-13 19:08:38,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:08:38,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:08:38,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:08:38,674 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:08:38,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 19:08:38,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 19:08:38,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:08:38,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-13 19:08:38,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:08:39,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:08:39,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:08:40,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:08:40,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594620803] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:08:40,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:08:40,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 29 [2022-12-13 19:08:40,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463284082] [2022-12-13 19:08:40,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:08:40,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 19:08:40,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:08:40,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 19:08:40,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=767, Unknown=0, NotChecked=0, Total=930 [2022-12-13 19:08:46,813 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 195 [2022-12-13 19:08:46,815 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 556 transitions, 8155 flow. Second operand has 31 states, 31 states have (on average 67.7741935483871) internal successors, (2101), 31 states have internal predecessors, (2101), 0 states have call successors, (0), 0 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 19:08:46,815 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:08:46,815 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 195 [2022-12-13 19:08:46,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:09:12,330 INFO L130 PetriNetUnfolder]: 2353/4026 cut-off events. [2022-12-13 19:09:12,330 INFO L131 PetriNetUnfolder]: For 93297/93297 co-relation queries the response was YES. [2022-12-13 19:09:12,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28826 conditions, 4026 events. 2353/4026 cut-off events. For 93297/93297 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 24820 event pairs, 3 based on Foata normal form. 10/4036 useless extension candidates. Maximal degree in co-relation 28743. Up to 879 conditions per place. [2022-12-13 19:09:12,362 INFO L137 encePairwiseOnDemand]: 184/195 looper letters, 216 selfloop transitions, 869 changer transitions 78/1163 dead transitions. [2022-12-13 19:09:12,362 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 1163 transitions, 19357 flow [2022-12-13 19:09:12,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-12-13 19:09:12,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2022-12-13 19:09:12,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 6014 transitions. [2022-12-13 19:09:12,368 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36283559577677227 [2022-12-13 19:09:12,368 INFO L72 ComplementDD]: Start complementDD. Operand 85 states and 6014 transitions. [2022-12-13 19:09:12,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 6014 transitions. [2022-12-13 19:09:12,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:09:12,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 85 states and 6014 transitions. [2022-12-13 19:09:12,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 86 states, 85 states have (on average 70.75294117647059) internal successors, (6014), 85 states have internal predecessors, (6014), 0 states have call successors, (0), 0 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 19:09:12,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 86 states, 86 states have (on average 195.0) internal successors, (16770), 86 states have internal predecessors, (16770), 0 states have call successors, (0), 0 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 19:09:12,389 INFO L81 ComplementDD]: Finished complementDD. Result has 86 states, 86 states have (on average 195.0) internal successors, (16770), 86 states have internal predecessors, (16770), 0 states have call successors, (0), 0 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 19:09:12,389 INFO L175 Difference]: Start difference. First operand has 237 places, 556 transitions, 8155 flow. Second operand 85 states and 6014 transitions. [2022-12-13 19:09:12,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 1163 transitions, 19357 flow [2022-12-13 19:09:12,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 1163 transitions, 17948 flow, removed 351 selfloop flow, removed 34 redundant places. [2022-12-13 19:09:12,797 INFO L231 Difference]: Finished difference. Result has 306 places, 958 transitions, 15552 flow [2022-12-13 19:09:12,798 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=7566, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=480, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=15552, PETRI_PLACES=306, PETRI_TRANSITIONS=958} [2022-12-13 19:09:12,798 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 275 predicate places. [2022-12-13 19:09:12,798 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 958 transitions, 15552 flow [2022-12-13 19:09:12,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 67.7741935483871) internal successors, (2101), 31 states have internal predecessors, (2101), 0 states have call successors, (0), 0 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 19:09:12,799 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:09:12,799 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:09:12,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 19:09:12,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:09:13,000 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 19:09:13,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:09:13,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1055867468, now seen corresponding path program 3 times [2022-12-13 19:09:13,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:09:13,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031005442] [2022-12-13 19:09:13,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:09:13,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:09:13,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:09:13,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:09:13,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:09:13,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031005442] [2022-12-13 19:09:13,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031005442] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:09:13,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666179333] [2022-12-13 19:09:13,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:09:13,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:09:13,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:09:13,519 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:09:13,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 19:09:13,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 19:09:13,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:09:13,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 19:09:13,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:09:14,175 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 19:09:14,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:09:14,729 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:09:14,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666179333] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:09:14,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:09:14,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2022-12-13 19:09:14,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345602221] [2022-12-13 19:09:14,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:09:14,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 19:09:14,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:09:14,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 19:09:14,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=783, Unknown=0, NotChecked=0, Total=992 [2022-12-13 19:09:15,548 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 195 [2022-12-13 19:09:15,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 958 transitions, 15552 flow. Second operand has 32 states, 32 states have (on average 69.78125) internal successors, (2233), 32 states have internal predecessors, (2233), 0 states have call successors, (0), 0 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 19:09:15,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:09:15,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 195 [2022-12-13 19:09:15,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:09:22,296 INFO L130 PetriNetUnfolder]: 2995/5119 cut-off events. [2022-12-13 19:09:22,296 INFO L131 PetriNetUnfolder]: For 181057/181057 co-relation queries the response was YES. [2022-12-13 19:09:22,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40479 conditions, 5119 events. 2995/5119 cut-off events. For 181057/181057 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 32991 event pairs, 8 based on Foata normal form. 9/5128 useless extension candidates. Maximal degree in co-relation 40381. Up to 1203 conditions per place. [2022-12-13 19:09:22,347 INFO L137 encePairwiseOnDemand]: 185/195 looper letters, 322 selfloop transitions, 1128 changer transitions 54/1504 dead transitions. [2022-12-13 19:09:22,347 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 1504 transitions, 27871 flow [2022-12-13 19:09:22,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-12-13 19:09:22,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-12-13 19:09:22,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 4521 transitions. [2022-12-13 19:09:22,361 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3739454094292804 [2022-12-13 19:09:22,362 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 4521 transitions. [2022-12-13 19:09:22,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 4521 transitions. [2022-12-13 19:09:22,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:09:22,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 4521 transitions. [2022-12-13 19:09:22,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 72.91935483870968) internal successors, (4521), 62 states have internal predecessors, (4521), 0 states have call successors, (0), 0 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 19:09:22,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 195.0) internal successors, (12285), 63 states have internal predecessors, (12285), 0 states have call successors, (0), 0 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 19:09:22,374 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 195.0) internal successors, (12285), 63 states have internal predecessors, (12285), 0 states have call successors, (0), 0 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 19:09:22,374 INFO L175 Difference]: Start difference. First operand has 306 places, 958 transitions, 15552 flow. Second operand 62 states and 4521 transitions. [2022-12-13 19:09:22,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 1504 transitions, 27871 flow [2022-12-13 19:09:23,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 1504 transitions, 26936 flow, removed 449 selfloop flow, removed 15 redundant places. [2022-12-13 19:09:23,376 INFO L231 Difference]: Finished difference. Result has 369 places, 1328 transitions, 24409 flow [2022-12-13 19:09:23,376 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=15019, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=958, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=789, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=24409, PETRI_PLACES=369, PETRI_TRANSITIONS=1328} [2022-12-13 19:09:23,377 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 338 predicate places. [2022-12-13 19:09:23,377 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 1328 transitions, 24409 flow [2022-12-13 19:09:23,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 69.78125) internal successors, (2233), 32 states have internal predecessors, (2233), 0 states have call successors, (0), 0 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 19:09:23,377 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:09:23,377 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:09:23,381 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 19:09:23,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 19:09:23,579 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 19:09:23,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:09:23,580 INFO L85 PathProgramCache]: Analyzing trace with hash -627368165, now seen corresponding path program 5 times [2022-12-13 19:09:23,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:09:23,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438517944] [2022-12-13 19:09:23,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:09:23,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:09:23,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:09:24,733 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:09:24,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:09:24,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438517944] [2022-12-13 19:09:24,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438517944] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:09:24,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481605288] [2022-12-13 19:09:24,733 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 19:09:24,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:09:24,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:09:24,734 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:09:24,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 19:09:24,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 19:09:24,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:09:24,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 19:09:24,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:09:25,799 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:09:25,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:09:28,233 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:09:28,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481605288] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:09:28,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:09:28,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 27 [2022-12-13 19:09:28,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054976975] [2022-12-13 19:09:28,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:09:28,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 19:09:28,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:09:28,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 19:09:28,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2022-12-13 19:09:29,472 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 195 [2022-12-13 19:09:29,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 1328 transitions, 24409 flow. Second operand has 29 states, 29 states have (on average 73.03448275862068) internal successors, (2118), 29 states have internal predecessors, (2118), 0 states have call successors, (0), 0 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 19:09:29,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:09:29,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 195 [2022-12-13 19:09:29,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:10:14,045 INFO L130 PetriNetUnfolder]: 4068/7041 cut-off events. [2022-12-13 19:10:14,045 INFO L131 PetriNetUnfolder]: For 347328/347328 co-relation queries the response was YES. [2022-12-13 19:10:14,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62760 conditions, 7041 events. 4068/7041 cut-off events. For 347328/347328 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 48162 event pairs, 1 based on Foata normal form. 12/7053 useless extension candidates. Maximal degree in co-relation 62646. Up to 1935 conditions per place. [2022-12-13 19:10:14,109 INFO L137 encePairwiseOnDemand]: 185/195 looper letters, 598 selfloop transitions, 1451 changer transitions 86/2135 dead transitions. [2022-12-13 19:10:14,109 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 2135 transitions, 42582 flow [2022-12-13 19:10:14,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-12-13 19:10:14,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2022-12-13 19:10:14,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 6513 transitions. [2022-12-13 19:10:14,117 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3883720930232558 [2022-12-13 19:10:14,118 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 6513 transitions. [2022-12-13 19:10:14,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 6513 transitions. [2022-12-13 19:10:14,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:10:14,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 6513 transitions. [2022-12-13 19:10:14,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 75.73255813953489) internal successors, (6513), 86 states have internal predecessors, (6513), 0 states have call successors, (0), 0 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 19:10:14,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 195.0) internal successors, (16965), 87 states have internal predecessors, (16965), 0 states have call successors, (0), 0 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 19:10:14,138 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 195.0) internal successors, (16965), 87 states have internal predecessors, (16965), 0 states have call successors, (0), 0 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 19:10:14,138 INFO L175 Difference]: Start difference. First operand has 369 places, 1328 transitions, 24409 flow. Second operand 86 states and 6513 transitions. [2022-12-13 19:10:14,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 2135 transitions, 42582 flow [2022-12-13 19:10:16,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 2135 transitions, 41920 flow, removed 294 selfloop flow, removed 19 redundant places. [2022-12-13 19:10:16,447 INFO L231 Difference]: Finished difference. Result has 457 places, 1850 transitions, 38910 flow [2022-12-13 19:10:16,448 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=24011, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=979, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=38910, PETRI_PLACES=457, PETRI_TRANSITIONS=1850} [2022-12-13 19:10:16,449 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 426 predicate places. [2022-12-13 19:10:16,449 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 1850 transitions, 38910 flow [2022-12-13 19:10:16,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 73.03448275862068) internal successors, (2118), 29 states have internal predecessors, (2118), 0 states have call successors, (0), 0 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 19:10:16,449 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:10:16,449 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:10:16,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-13 19:10:16,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 19:10:16,651 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 19:10:16,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:10:16,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1829170203, now seen corresponding path program 6 times [2022-12-13 19:10:16,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:10:16,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420271261] [2022-12-13 19:10:16,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:10:16,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:10:16,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:10:17,661 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:10:17,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:10:17,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420271261] [2022-12-13 19:10:17,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420271261] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:10:17,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224057000] [2022-12-13 19:10:17,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 19:10:17,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:10:17,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:10:17,662 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:10:17,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 19:10:17,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-12-13 19:10:17,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:10:17,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 19:10:17,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:10:18,747 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:10:18,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:10:21,712 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:10:21,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224057000] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:10:21,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:10:21,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2022-12-13 19:10:21,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351487406] [2022-12-13 19:10:21,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:10:21,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 19:10:21,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:10:21,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 19:10:21,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2022-12-13 19:10:23,199 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 195 [2022-12-13 19:10:23,200 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 1850 transitions, 38910 flow. Second operand has 27 states, 27 states have (on average 73.96296296296296) internal successors, (1997), 27 states have internal predecessors, (1997), 0 states have call successors, (0), 0 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 19:10:23,200 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:10:23,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 195 [2022-12-13 19:10:23,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:10:50,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:11:11,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:11:25,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:11:35,350 INFO L130 PetriNetUnfolder]: 4879/8482 cut-off events. [2022-12-13 19:11:35,350 INFO L131 PetriNetUnfolder]: For 415174/415174 co-relation queries the response was YES. [2022-12-13 19:11:35,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83498 conditions, 8482 events. 4879/8482 cut-off events. For 415174/415174 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 59337 event pairs, 16 based on Foata normal form. 28/8510 useless extension candidates. Maximal degree in co-relation 83368. Up to 2662 conditions per place. [2022-12-13 19:11:35,455 INFO L137 encePairwiseOnDemand]: 185/195 looper letters, 853 selfloop transitions, 1575 changer transitions 147/2575 dead transitions. [2022-12-13 19:11:35,455 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 2575 transitions, 58925 flow [2022-12-13 19:11:35,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-12-13 19:11:35,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-12-13 19:11:35,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 6216 transitions. [2022-12-13 19:11:35,463 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39354226020892685 [2022-12-13 19:11:35,463 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 6216 transitions. [2022-12-13 19:11:35,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 6216 transitions. [2022-12-13 19:11:35,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:11:35,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 6216 transitions. [2022-12-13 19:11:35,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 76.74074074074075) internal successors, (6216), 81 states have internal predecessors, (6216), 0 states have call successors, (0), 0 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 19:11:35,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 195.0) internal successors, (15990), 82 states have internal predecessors, (15990), 0 states have call successors, (0), 0 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 19:11:35,487 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 195.0) internal successors, (15990), 82 states have internal predecessors, (15990), 0 states have call successors, (0), 0 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 19:11:35,487 INFO L175 Difference]: Start difference. First operand has 457 places, 1850 transitions, 38910 flow. Second operand 81 states and 6216 transitions. [2022-12-13 19:11:35,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 2575 transitions, 58925 flow [2022-12-13 19:11:40,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 2575 transitions, 55129 flow, removed 1887 selfloop flow, removed 12 redundant places. [2022-12-13 19:11:40,758 INFO L231 Difference]: Finished difference. Result has 544 places, 2187 transitions, 50142 flow [2022-12-13 19:11:40,759 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=37546, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1850, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=50142, PETRI_PLACES=544, PETRI_TRANSITIONS=2187} [2022-12-13 19:11:40,759 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 513 predicate places. [2022-12-13 19:11:40,759 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 2187 transitions, 50142 flow [2022-12-13 19:11:40,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 73.96296296296296) internal successors, (1997), 27 states have internal predecessors, (1997), 0 states have call successors, (0), 0 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 19:11:40,760 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:11:40,760 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:11:40,764 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 19:11:40,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 19:11:40,961 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 19:11:40,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:11:40,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1015532625, now seen corresponding path program 7 times [2022-12-13 19:11:40,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:11:40,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662581986] [2022-12-13 19:11:40,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:11:40,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:11:40,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:11:41,944 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:11:41,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:11:41,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662581986] [2022-12-13 19:11:41,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662581986] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:11:41,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611843887] [2022-12-13 19:11:41,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 19:11:41,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:11:41,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:11:41,945 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:11:41,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 19:11:42,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:11:42,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 19:11:42,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:11:43,059 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:11:43,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:11:44,409 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:11:44,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611843887] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:11:44,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:11:44,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2022-12-13 19:11:44,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820862582] [2022-12-13 19:11:44,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:11:44,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 19:11:44,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:11:44,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 19:11:44,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2022-12-13 19:11:46,362 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 195 [2022-12-13 19:11:46,363 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 2187 transitions, 50142 flow. Second operand has 28 states, 28 states have (on average 77.0) internal successors, (2156), 28 states have internal predecessors, (2156), 0 states have call successors, (0), 0 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 19:11:46,363 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:11:46,363 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 195 [2022-12-13 19:11:46,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:11:53,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:12:08,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:12:09,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:13:20,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:13:29,467 INFO L130 PetriNetUnfolder]: 5834/10110 cut-off events. [2022-12-13 19:13:29,467 INFO L131 PetriNetUnfolder]: For 308847/308847 co-relation queries the response was YES. [2022-12-13 19:13:29,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101423 conditions, 10110 events. 5834/10110 cut-off events. For 308847/308847 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 72472 event pairs, 18 based on Foata normal form. 24/10134 useless extension candidates. Maximal degree in co-relation 101269. Up to 2950 conditions per place. [2022-12-13 19:13:29,597 INFO L137 encePairwiseOnDemand]: 187/195 looper letters, 863 selfloop transitions, 2011 changer transitions 177/3069 dead transitions. [2022-12-13 19:13:29,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 623 places, 3069 transitions, 75012 flow [2022-12-13 19:13:29,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-12-13 19:13:29,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2022-12-13 19:13:29,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 7550 transitions. [2022-12-13 19:13:29,602 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.407557354925776 [2022-12-13 19:13:29,603 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 7550 transitions. [2022-12-13 19:13:29,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 7550 transitions. [2022-12-13 19:13:29,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:13:29,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 7550 transitions. [2022-12-13 19:13:29,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 96 states, 95 states have (on average 79.47368421052632) internal successors, (7550), 95 states have internal predecessors, (7550), 0 states have call successors, (0), 0 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 19:13:29,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 96 states, 96 states have (on average 195.0) internal successors, (18720), 96 states have internal predecessors, (18720), 0 states have call successors, (0), 0 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 19:13:29,621 INFO L81 ComplementDD]: Finished complementDD. Result has 96 states, 96 states have (on average 195.0) internal successors, (18720), 96 states have internal predecessors, (18720), 0 states have call successors, (0), 0 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 19:13:29,621 INFO L175 Difference]: Start difference. First operand has 544 places, 2187 transitions, 50142 flow. Second operand 95 states and 7550 transitions. [2022-12-13 19:13:29,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 623 places, 3069 transitions, 75012 flow [2022-12-13 19:13:36,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 594 places, 3069 transitions, 74206 flow, removed 320 selfloop flow, removed 29 redundant places. [2022-12-13 19:13:36,586 INFO L231 Difference]: Finished difference. Result has 624 places, 2636 transitions, 67558 flow [2022-12-13 19:13:36,587 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=49583, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1565, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=67558, PETRI_PLACES=624, PETRI_TRANSITIONS=2636} [2022-12-13 19:13:36,587 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 593 predicate places. [2022-12-13 19:13:36,588 INFO L495 AbstractCegarLoop]: Abstraction has has 624 places, 2636 transitions, 67558 flow [2022-12-13 19:13:36,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 77.0) internal successors, (2156), 28 states have internal predecessors, (2156), 0 states have call successors, (0), 0 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 19:13:36,588 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:13:36,588 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:13:36,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 19:13:36,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 19:13:36,789 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 19:13:36,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:13:36,789 INFO L85 PathProgramCache]: Analyzing trace with hash 2093601627, now seen corresponding path program 8 times [2022-12-13 19:13:36,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:13:36,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304382533] [2022-12-13 19:13:36,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:13:36,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:13:36,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:13:37,841 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:13:37,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:13:37,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304382533] [2022-12-13 19:13:37,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304382533] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:13:37,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218546835] [2022-12-13 19:13:37,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:13:37,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:13:37,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:13:37,843 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:13:37,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 19:13:38,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:13:38,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:13:38,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 19:13:38,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:13:38,838 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:13:38,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:13:41,965 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:13:41,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218546835] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:13:41,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:13:41,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 25 [2022-12-13 19:13:41,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74269585] [2022-12-13 19:13:41,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:13:41,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 19:13:41,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:13:41,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 19:13:41,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2022-12-13 19:13:43,652 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 195 [2022-12-13 19:13:43,653 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 624 places, 2636 transitions, 67558 flow. Second operand has 27 states, 27 states have (on average 77.07407407407408) internal successors, (2081), 27 states have internal predecessors, (2081), 0 states have call successors, (0), 0 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 19:13:43,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:13:43,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 195 [2022-12-13 19:13:43,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:13:47,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:13:49,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:13:52,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:13:54,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:13:56,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:13:57,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:14:08,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:14:50,169 INFO L130 PetriNetUnfolder]: 6681/11583 cut-off events. [2022-12-13 19:14:50,169 INFO L131 PetriNetUnfolder]: For 405287/405287 co-relation queries the response was YES. [2022-12-13 19:14:50,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124441 conditions, 11583 events. 6681/11583 cut-off events. For 405287/405287 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 84975 event pairs, 26 based on Foata normal form. 18/11601 useless extension candidates. Maximal degree in co-relation 124270. Up to 3732 conditions per place. [2022-12-13 19:14:50,326 INFO L137 encePairwiseOnDemand]: 187/195 looper letters, 898 selfloop transitions, 2392 changer transitions 116/3424 dead transitions. [2022-12-13 19:14:50,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 671 places, 3424 transitions, 92989 flow [2022-12-13 19:14:50,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-12-13 19:14:50,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-12-13 19:14:50,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 4954 transitions. [2022-12-13 19:14:50,331 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4097601323407775 [2022-12-13 19:14:50,331 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 4954 transitions. [2022-12-13 19:14:50,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 4954 transitions. [2022-12-13 19:14:50,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:14:50,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 4954 transitions. [2022-12-13 19:14:50,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 79.90322580645162) internal successors, (4954), 62 states have internal predecessors, (4954), 0 states have call successors, (0), 0 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 19:14:50,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 195.0) internal successors, (12285), 63 states have internal predecessors, (12285), 0 states have call successors, (0), 0 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 19:14:50,343 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 195.0) internal successors, (12285), 63 states have internal predecessors, (12285), 0 states have call successors, (0), 0 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 19:14:50,343 INFO L175 Difference]: Start difference. First operand has 624 places, 2636 transitions, 67558 flow. Second operand 62 states and 4954 transitions. [2022-12-13 19:14:50,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 671 places, 3424 transitions, 92989 flow [2022-12-13 19:15:00,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 651 places, 3424 transitions, 91379 flow, removed 750 selfloop flow, removed 20 redundant places. [2022-12-13 19:15:00,442 INFO L231 Difference]: Finished difference. Result has 672 places, 3093 transitions, 85619 flow [2022-12-13 19:15:00,443 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=66394, PETRI_DIFFERENCE_MINUEND_PLACES=590, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1966, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=85619, PETRI_PLACES=672, PETRI_TRANSITIONS=3093} [2022-12-13 19:15:00,443 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 641 predicate places. [2022-12-13 19:15:00,444 INFO L495 AbstractCegarLoop]: Abstraction has has 672 places, 3093 transitions, 85619 flow [2022-12-13 19:15:00,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 77.07407407407408) internal successors, (2081), 27 states have internal predecessors, (2081), 0 states have call successors, (0), 0 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 19:15:00,444 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:15:00,444 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:15:00,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 19:15:00,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 19:15:00,645 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 19:15:00,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:15:00,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1294829531, now seen corresponding path program 9 times [2022-12-13 19:15:00,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:15:00,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120509079] [2022-12-13 19:15:00,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:15:00,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:15:00,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:01,295 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:15:01,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:15:01,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120509079] [2022-12-13 19:15:01,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120509079] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:15:01,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360598875] [2022-12-13 19:15:01,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:15:01,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:15:01,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:15:01,296 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:15:01,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 19:15:01,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 19:15:01,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:15:01,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 19:15:01,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:15:02,298 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:15:02,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:15:03,909 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:15:03,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360598875] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:15:03,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:15:03,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 28 [2022-12-13 19:15:03,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37978440] [2022-12-13 19:15:03,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:15:03,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 19:15:03,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:15:03,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 19:15:03,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=693, Unknown=0, NotChecked=0, Total=870 [2022-12-13 19:15:05,732 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 195 [2022-12-13 19:15:05,733 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 672 places, 3093 transitions, 85619 flow. Second operand has 30 states, 30 states have (on average 76.86666666666666) internal successors, (2306), 30 states have internal predecessors, (2306), 0 states have call successors, (0), 0 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 19:15:05,733 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:15:05,733 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 195 [2022-12-13 19:15:05,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:15:10,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:15:20,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:15:28,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 19:16:05,107 INFO L130 PetriNetUnfolder]: 7252/12608 cut-off events. [2022-12-13 19:16:05,107 INFO L131 PetriNetUnfolder]: For 443571/443571 co-relation queries the response was YES. [2022-12-13 19:16:05,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141096 conditions, 12608 events. 7252/12608 cut-off events. For 443571/443571 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 94042 event pairs, 20 based on Foata normal form. 24/12632 useless extension candidates. Maximal degree in co-relation 140911. Up to 4360 conditions per place. [2022-12-13 19:16:05,325 INFO L137 encePairwiseOnDemand]: 187/195 looper letters, 1064 selfloop transitions, 2389 changer transitions 207/3678 dead transitions. [2022-12-13 19:16:05,325 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 743 places, 3678 transitions, 105532 flow [2022-12-13 19:16:05,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-12-13 19:16:05,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-12-13 19:16:05,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 6461 transitions. [2022-12-13 19:16:05,333 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4090534979423868 [2022-12-13 19:16:05,333 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 6461 transitions. [2022-12-13 19:16:05,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 6461 transitions. [2022-12-13 19:16:05,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:16:05,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 6461 transitions. [2022-12-13 19:16:05,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 79.76543209876543) internal successors, (6461), 81 states have internal predecessors, (6461), 0 states have call successors, (0), 0 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 19:16:05,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 195.0) internal successors, (15990), 82 states have internal predecessors, (15990), 0 states have call successors, (0), 0 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 19:16:05,355 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 195.0) internal successors, (15990), 82 states have internal predecessors, (15990), 0 states have call successors, (0), 0 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 19:16:05,355 INFO L175 Difference]: Start difference. First operand has 672 places, 3093 transitions, 85619 flow. Second operand 81 states and 6461 transitions. [2022-12-13 19:16:05,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 743 places, 3678 transitions, 105532 flow [2022-12-13 19:16:17,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 720 places, 3678 transitions, 104302 flow, removed 483 selfloop flow, removed 23 redundant places. [2022-12-13 19:16:17,964 INFO L231 Difference]: Finished difference. Result has 738 places, 3269 transitions, 95512 flow [2022-12-13 19:16:17,965 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=84469, PETRI_DIFFERENCE_MINUEND_PLACES=640, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3093, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=901, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=95512, PETRI_PLACES=738, PETRI_TRANSITIONS=3269} [2022-12-13 19:16:17,966 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 707 predicate places. [2022-12-13 19:16:17,966 INFO L495 AbstractCegarLoop]: Abstraction has has 738 places, 3269 transitions, 95512 flow [2022-12-13 19:16:17,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 76.86666666666666) internal successors, (2306), 30 states have internal predecessors, (2306), 0 states have call successors, (0), 0 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 19:16:17,966 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:16:17,966 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:16:17,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 19:16:18,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:16:18,168 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 19:16:18,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:16:18,169 INFO L85 PathProgramCache]: Analyzing trace with hash -2038346597, now seen corresponding path program 10 times [2022-12-13 19:16:18,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:16:18,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748540361] [2022-12-13 19:16:18,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:16:18,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:16:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:16:18,981 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:16:18,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:16:18,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748540361] [2022-12-13 19:16:18,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748540361] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:16:18,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893808520] [2022-12-13 19:16:18,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:16:18,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:16:18,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:16:18,982 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:16:18,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 19:16:19,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 19:16:19,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:16:19,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 19:16:19,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:16:20,710 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:16:20,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:16:22,549 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:16:22,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893808520] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:16:22,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:16:22,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 28 [2022-12-13 19:16:22,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081727405] [2022-12-13 19:16:22,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:16:22,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 19:16:22,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:16:22,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 19:16:22,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2022-12-13 19:16:25,311 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 195 [2022-12-13 19:16:25,312 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 738 places, 3269 transitions, 95512 flow. Second operand has 30 states, 30 states have (on average 77.0) internal successors, (2310), 30 states have internal predecessors, (2310), 0 states have call successors, (0), 0 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 19:16:25,312 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:16:25,312 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 195 [2022-12-13 19:16:25,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:17:28,458 INFO L130 PetriNetUnfolder]: 7701/13393 cut-off events. [2022-12-13 19:17:28,458 INFO L131 PetriNetUnfolder]: For 487935/487935 co-relation queries the response was YES. [2022-12-13 19:17:28,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155182 conditions, 13393 events. 7701/13393 cut-off events. For 487935/487935 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 100870 event pairs, 12 based on Foata normal form. 26/13419 useless extension candidates. Maximal degree in co-relation 154985. Up to 5331 conditions per place. [2022-12-13 19:17:28,664 INFO L137 encePairwiseOnDemand]: 187/195 looper letters, 1354 selfloop transitions, 2333 changer transitions 132/3837 dead transitions. [2022-12-13 19:17:28,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 785 places, 3837 transitions, 115489 flow [2022-12-13 19:17:28,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-12-13 19:17:28,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-12-13 19:17:28,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 5759 transitions. [2022-12-13 19:17:28,669 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4101851851851852 [2022-12-13 19:17:28,669 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 5759 transitions. [2022-12-13 19:17:28,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 5759 transitions. [2022-12-13 19:17:28,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:17:28,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 5759 transitions. [2022-12-13 19:17:28,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 79.98611111111111) internal successors, (5759), 72 states have internal predecessors, (5759), 0 states have call successors, (0), 0 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 19:17:28,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 195.0) internal successors, (14235), 73 states have internal predecessors, (14235), 0 states have call successors, (0), 0 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 19:17:28,721 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 195.0) internal successors, (14235), 73 states have internal predecessors, (14235), 0 states have call successors, (0), 0 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 19:17:28,721 INFO L175 Difference]: Start difference. First operand has 738 places, 3269 transitions, 95512 flow. Second operand 72 states and 5759 transitions. [2022-12-13 19:17:28,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 785 places, 3837 transitions, 115489 flow [2022-12-13 19:17:40,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 737 places, 3837 transitions, 114249 flow, removed 415 selfloop flow, removed 48 redundant places. [2022-12-13 19:17:40,861 INFO L231 Difference]: Finished difference. Result has 764 places, 3473 transitions, 110179 flow [2022-12-13 19:17:40,862 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=94631, PETRI_DIFFERENCE_MINUEND_PLACES=666, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1072, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=110179, PETRI_PLACES=764, PETRI_TRANSITIONS=3473} [2022-12-13 19:17:40,862 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 733 predicate places. [2022-12-13 19:17:40,862 INFO L495 AbstractCegarLoop]: Abstraction has has 764 places, 3473 transitions, 110179 flow [2022-12-13 19:17:40,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 77.0) internal successors, (2310), 30 states have internal predecessors, (2310), 0 states have call successors, (0), 0 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 19:17:40,863 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:17:40,863 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:17:40,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 19:17:41,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:17:41,065 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 19:17:41,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:17:41,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1276482778, now seen corresponding path program 11 times [2022-12-13 19:17:41,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:17:41,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000889225] [2022-12-13 19:17:41,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:17:41,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:17:41,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:17:41,750 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:17:41,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:17:41,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000889225] [2022-12-13 19:17:41,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000889225] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:17:41,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221579585] [2022-12-13 19:17:41,751 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 19:17:41,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:17:41,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:17:41,752 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:17:41,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 19:17:41,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 19:17:41,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:17:41,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 19:17:41,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:17:43,030 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:17:43,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:17:44,783 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:17:44,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221579585] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:17:44,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:17:44,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2022-12-13 19:17:44,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436545577] [2022-12-13 19:17:44,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:17:44,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 19:17:44,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:17:44,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 19:17:44,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2022-12-13 19:17:46,148 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 195 [2022-12-13 19:17:46,149 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 764 places, 3473 transitions, 110179 flow. Second operand has 28 states, 28 states have (on average 74.10714285714286) internal successors, (2075), 28 states have internal predecessors, (2075), 0 states have call successors, (0), 0 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 19:17:46,149 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:17:46,149 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 195 [2022-12-13 19:17:46,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:18:40,826 INFO L130 PetriNetUnfolder]: 8839/15305 cut-off events. [2022-12-13 19:18:40,827 INFO L131 PetriNetUnfolder]: For 602921/602921 co-relation queries the response was YES. [2022-12-13 19:18:41,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186697 conditions, 15305 events. 8839/15305 cut-off events. For 602921/602921 co-relation queries the response was YES. Maximal size of possible extension queue 877. Compared 117903 event pairs, 53 based on Foata normal form. 27/15332 useless extension candidates. Maximal degree in co-relation 186490. Up to 4771 conditions per place. [2022-12-13 19:18:41,112 INFO L137 encePairwiseOnDemand]: 184/195 looper letters, 1140 selfloop transitions, 3044 changer transitions 141/4325 dead transitions. [2022-12-13 19:18:41,112 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 832 places, 4325 transitions, 140534 flow [2022-12-13 19:18:41,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-12-13 19:18:41,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2022-12-13 19:18:41,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 6364 transitions. [2022-12-13 19:18:41,118 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3932035835650293 [2022-12-13 19:18:41,118 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 6364 transitions. [2022-12-13 19:18:41,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 6364 transitions. [2022-12-13 19:18:41,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:18:41,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 6364 transitions. [2022-12-13 19:18:41,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 76.67469879518072) internal successors, (6364), 83 states have internal predecessors, (6364), 0 states have call successors, (0), 0 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 19:18:41,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 195.0) internal successors, (16380), 84 states have internal predecessors, (16380), 0 states have call successors, (0), 0 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 19:18:41,136 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 195.0) internal successors, (16380), 84 states have internal predecessors, (16380), 0 states have call successors, (0), 0 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 19:18:41,136 INFO L175 Difference]: Start difference. First operand has 764 places, 3473 transitions, 110179 flow. Second operand 83 states and 6364 transitions. [2022-12-13 19:18:41,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 832 places, 4325 transitions, 140534 flow [2022-12-13 19:18:56,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 798 places, 4325 transitions, 139320 flow, removed 525 selfloop flow, removed 34 redundant places. [2022-12-13 19:18:57,046 INFO L231 Difference]: Finished difference. Result has 850 places, 4033 transitions, 138551 flow [2022-12-13 19:18:57,048 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=109401, PETRI_DIFFERENCE_MINUEND_PLACES=716, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2517, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=839, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=138551, PETRI_PLACES=850, PETRI_TRANSITIONS=4033} [2022-12-13 19:18:57,048 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 819 predicate places. [2022-12-13 19:18:57,048 INFO L495 AbstractCegarLoop]: Abstraction has has 850 places, 4033 transitions, 138551 flow [2022-12-13 19:18:57,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 74.10714285714286) internal successors, (2075), 28 states have internal predecessors, (2075), 0 states have call successors, (0), 0 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 19:18:57,048 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:18:57,048 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:18:57,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 19:18:57,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:18:57,250 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 19:18:57,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:18:57,251 INFO L85 PathProgramCache]: Analyzing trace with hash -619335338, now seen corresponding path program 12 times [2022-12-13 19:18:57,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:18:57,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481672298] [2022-12-13 19:18:57,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:18:57,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:18:57,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:18:58,066 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:58,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:18:58,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481672298] [2022-12-13 19:18:58,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481672298] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:18:58,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053393210] [2022-12-13 19:18:58,067 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 19:18:58,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:18:58,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:18:58,068 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:18:58,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 19:18:58,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 19:18:58,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:18:58,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 19:18:58,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:18:59,159 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:59,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:19:00,887 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:19:00,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053393210] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:19:00,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:19:00,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2022-12-13 19:19:00,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210255517] [2022-12-13 19:19:00,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:19:00,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 19:19:00,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:19:00,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 19:19:00,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2022-12-13 19:19:02,753 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 195 [2022-12-13 19:19:02,754 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 850 places, 4033 transitions, 138551 flow. Second operand has 28 states, 28 states have (on average 77.0) internal successors, (2156), 28 states have internal predecessors, (2156), 0 states have call successors, (0), 0 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 19:19:02,754 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:19:02,754 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 195 [2022-12-13 19:19:02,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:19:49,877 INFO L130 PetriNetUnfolder]: 9586/16569 cut-off events. [2022-12-13 19:19:49,877 INFO L131 PetriNetUnfolder]: For 803408/803408 co-relation queries the response was YES. [2022-12-13 19:19:50,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223102 conditions, 16569 events. 9586/16569 cut-off events. For 803408/803408 co-relation queries the response was YES. Maximal size of possible extension queue 991. Compared 129476 event pairs, 74 based on Foata normal form. 17/16586 useless extension candidates. Maximal degree in co-relation 222855. Up to 6856 conditions per place. [2022-12-13 19:19:50,240 INFO L137 encePairwiseOnDemand]: 187/195 looper letters, 1528 selfloop transitions, 3087 changer transitions 113/4746 dead transitions. [2022-12-13 19:19:50,240 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 910 places, 4746 transitions, 168009 flow [2022-12-13 19:19:50,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-12-13 19:19:50,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2022-12-13 19:19:50,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 6137 transitions. [2022-12-13 19:19:50,245 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40872460872460875 [2022-12-13 19:19:50,245 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 6137 transitions. [2022-12-13 19:19:50,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 6137 transitions. [2022-12-13 19:19:50,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:19:50,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 6137 transitions. [2022-12-13 19:19:50,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 79.7012987012987) internal successors, (6137), 77 states have internal predecessors, (6137), 0 states have call successors, (0), 0 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 19:19:50,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 195.0) internal successors, (15210), 78 states have internal predecessors, (15210), 0 states have call successors, (0), 0 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 19:19:50,259 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 195.0) internal successors, (15210), 78 states have internal predecessors, (15210), 0 states have call successors, (0), 0 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 19:19:50,259 INFO L175 Difference]: Start difference. First operand has 850 places, 4033 transitions, 138551 flow. Second operand 77 states and 6137 transitions. [2022-12-13 19:19:50,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 910 places, 4746 transitions, 168009 flow [2022-12-13 19:20:14,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 881 places, 4746 transitions, 167284 flow, removed 320 selfloop flow, removed 29 redundant places. [2022-12-13 19:20:14,286 INFO L231 Difference]: Finished difference. Result has 923 places, 4404 transitions, 159299 flow [2022-12-13 19:20:14,288 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=137954, PETRI_DIFFERENCE_MINUEND_PLACES=805, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4033, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2751, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=159299, PETRI_PLACES=923, PETRI_TRANSITIONS=4404} [2022-12-13 19:20:14,289 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 892 predicate places. [2022-12-13 19:20:14,289 INFO L495 AbstractCegarLoop]: Abstraction has has 923 places, 4404 transitions, 159299 flow [2022-12-13 19:20:14,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 77.0) internal successors, (2156), 28 states have internal predecessors, (2156), 0 states have call successors, (0), 0 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 19:20:14,289 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:20:14,289 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:20:14,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 19:20:14,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-13 19:20:14,491 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 19:20:14,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:20:14,492 INFO L85 PathProgramCache]: Analyzing trace with hash -915833110, now seen corresponding path program 13 times [2022-12-13 19:20:14,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:20:14,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450991622] [2022-12-13 19:20:14,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:20:14,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:20:14,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:20:14,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:20:14,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:20:14,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450991622] [2022-12-13 19:20:14,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450991622] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:20:14,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180766792] [2022-12-13 19:20:14,780 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 19:20:14,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:20:14,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:20:14,781 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:20:14,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 19:20:14,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:20:14,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 19:20:14,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:20:15,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:20:15,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:20:16,193 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:20:16,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180766792] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:20:16,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:20:16,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 13 [2022-12-13 19:20:16,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711039021] [2022-12-13 19:20:16,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:20:16,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 19:20:16,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:20:16,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 19:20:16,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-12-13 19:20:16,562 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 195 [2022-12-13 19:20:16,563 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 923 places, 4404 transitions, 159299 flow. Second operand has 14 states, 14 states have (on average 82.07142857142857) internal successors, (1149), 14 states have internal predecessors, (1149), 0 states have call successors, (0), 0 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 19:20:16,563 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:20:16,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 195 [2022-12-13 19:20:16,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:20:46,221 INFO L130 PetriNetUnfolder]: 11164/19234 cut-off events. [2022-12-13 19:20:46,221 INFO L131 PetriNetUnfolder]: For 1149181/1149181 co-relation queries the response was YES. [2022-12-13 19:20:46,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272008 conditions, 19234 events. 11164/19234 cut-off events. For 1149181/1149181 co-relation queries the response was YES. Maximal size of possible extension queue 1171. Compared 153059 event pairs, 12 based on Foata normal form. 64/19298 useless extension candidates. Maximal degree in co-relation 271734. Up to 8352 conditions per place. [2022-12-13 19:20:46,775 INFO L137 encePairwiseOnDemand]: 187/195 looper letters, 1968 selfloop transitions, 3474 changer transitions 0/5460 dead transitions. [2022-12-13 19:20:46,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 940 places, 5460 transitions, 204453 flow [2022-12-13 19:20:46,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 19:20:46,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-12-13 19:20:46,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2684 transitions. [2022-12-13 19:20:46,778 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44400330851943753 [2022-12-13 19:20:46,778 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2684 transitions. [2022-12-13 19:20:46,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2684 transitions. [2022-12-13 19:20:46,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:20:46,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2684 transitions. [2022-12-13 19:20:46,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 86.58064516129032) internal successors, (2684), 31 states have internal predecessors, (2684), 0 states have call successors, (0), 0 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 19:20:46,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 195.0) internal successors, (6240), 32 states have internal predecessors, (6240), 0 states have call successors, (0), 0 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 19:20:46,784 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 195.0) internal successors, (6240), 32 states have internal predecessors, (6240), 0 states have call successors, (0), 0 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 19:20:46,784 INFO L175 Difference]: Start difference. First operand has 923 places, 4404 transitions, 159299 flow. Second operand 31 states and 2684 transitions. [2022-12-13 19:20:46,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 940 places, 5460 transitions, 204453 flow [2022-12-13 19:21:20,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 914 places, 5460 transitions, 203233 flow, removed 545 selfloop flow, removed 26 redundant places. [2022-12-13 19:21:20,736 INFO L231 Difference]: Finished difference. Result has 936 places, 5087 transitions, 199758 flow [2022-12-13 19:21:20,738 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=158395, PETRI_DIFFERENCE_MINUEND_PLACES=884, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2874, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=199758, PETRI_PLACES=936, PETRI_TRANSITIONS=5087} [2022-12-13 19:21:20,738 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 905 predicate places. [2022-12-13 19:21:20,738 INFO L495 AbstractCegarLoop]: Abstraction has has 936 places, 5087 transitions, 199758 flow [2022-12-13 19:21:20,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.07142857142857) internal successors, (1149), 14 states have internal predecessors, (1149), 0 states have call successors, (0), 0 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 19:21:20,739 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:20,739 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:21:20,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-13 19:21:20,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-13 19:21:20,941 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-12-13 19:21:20,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:20,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1270796010, now seen corresponding path program 14 times [2022-12-13 19:21:20,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:21:20,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406447437] [2022-12-13 19:21:20,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:21:20,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:21:20,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:21:21,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:21:21,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:21:21,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406447437] [2022-12-13 19:21:21,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406447437] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:21:21,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622718823] [2022-12-13 19:21:21,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:21:21,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:21:21,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:21:21,625 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:21:21,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83758f8c-0d2c-458f-aa25-a01295726f05/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 19:21:21,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:21:21,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:21:21,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-13 19:21:21,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:21:23,020 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:21:23,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:21:25,940 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:21:25,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622718823] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:21:25,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:21:25,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 31 [2022-12-13 19:21:25,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945369713] [2022-12-13 19:21:25,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:21:25,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 19:21:25,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:21:25,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 19:21:25,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=862, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 19:21:27,608 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 195 [2022-12-13 19:21:27,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 936 places, 5087 transitions, 199758 flow. Second operand has 33 states, 33 states have (on average 72.78787878787878) internal successors, (2402), 33 states have internal predecessors, (2402), 0 states have call successors, (0), 0 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 19:21:27,609 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:21:27,609 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 195 [2022-12-13 19:21:27,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand