./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/fib_unsafe-5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/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_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/fib_unsafe-5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/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_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/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 e0f90189cbea201dcd094fc9e84327a00ade17017ada90c5df84c8712afaf176 --- 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 13:04:14,812 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 13:04:14,813 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 13:04:14,832 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 13:04:14,833 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 13:04:14,833 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 13:04:14,834 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 13:04:14,835 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 13:04:14,836 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 13:04:14,837 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 13:04:14,837 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 13:04:14,838 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 13:04:14,838 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 13:04:14,839 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 13:04:14,840 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 13:04:14,840 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 13:04:14,841 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 13:04:14,842 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 13:04:14,843 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 13:04:14,844 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 13:04:14,845 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 13:04:14,846 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 13:04:14,846 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 13:04:14,847 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 13:04:14,849 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 13:04:14,849 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 13:04:14,849 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 13:04:14,850 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 13:04:14,850 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 13:04:14,851 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 13:04:14,851 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 13:04:14,851 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 13:04:14,852 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 13:04:14,852 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 13:04:14,853 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 13:04:14,853 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 13:04:14,854 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 13:04:14,854 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 13:04:14,854 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 13:04:14,855 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 13:04:14,855 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 13:04:14,856 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 13:04:14,870 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 13:04:14,870 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 13:04:14,870 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 13:04:14,870 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 13:04:14,871 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 13:04:14,871 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 13:04:14,871 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 13:04:14,872 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 13:04:14,872 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 13:04:14,872 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 13:04:14,872 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 13:04:14,872 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 13:04:14,872 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 13:04:14,872 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 13:04:14,873 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 13:04:14,873 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 13:04:14,873 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 13:04:14,873 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 13:04:14,873 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 13:04:14,873 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 13:04:14,873 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 13:04:14,873 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 13:04:14,873 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 13:04:14,873 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 13:04:14,874 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 13:04:14,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:04:14,874 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 13:04:14,874 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 13:04:14,874 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 13:04:14,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 13:04:14,874 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 13:04:14,874 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 13:04:14,874 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 13:04:14,875 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 13:04:14,875 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_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0f90189cbea201dcd094fc9e84327a00ade17017ada90c5df84c8712afaf176 [2022-12-13 13:04:15,031 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 13:04:15,051 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 13:04:15,054 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 13:04:15,055 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 13:04:15,055 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 13:04:15,056 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread/fib_unsafe-5.i [2022-12-13 13:04:17,654 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 13:04:17,858 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 13:04:17,858 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/sv-benchmarks/c/pthread/fib_unsafe-5.i [2022-12-13 13:04:17,869 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/data/810667cad/765941e9f42d40919e1a80dd95c414d0/FLAGd9a9b5e3a [2022-12-13 13:04:18,237 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/data/810667cad/765941e9f42d40919e1a80dd95c414d0 [2022-12-13 13:04:18,242 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 13:04:18,244 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 13:04:18,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 13:04:18,245 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 13:04:18,250 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 13:04:18,251 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:04:18" (1/1) ... [2022-12-13 13:04:18,252 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5695846e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:18, skipping insertion in model container [2022-12-13 13:04:18,252 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:04:18" (1/1) ... [2022-12-13 13:04:18,259 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 13:04:18,283 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:04:18,460 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_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/sv-benchmarks/c/pthread/fib_unsafe-5.i[30243,30256] [2022-12-13 13:04:18,466 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 13:04:18,466 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 13:04:18,468 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 13:04:18,469 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 13:04:18,471 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 13:04:18,471 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 13:04:18,472 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 13:04:18,472 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 13:04:18,475 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 13:04:18,475 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 13:04:18,476 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:04:18,483 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 13:04:18,506 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_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/sv-benchmarks/c/pthread/fib_unsafe-5.i[30243,30256] [2022-12-13 13:04:18,506 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 13:04:18,507 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 13:04:18,507 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 13:04:18,508 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 13:04:18,510 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 13:04:18,510 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 13:04:18,510 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 13:04:18,510 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 13:04:18,511 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 13:04:18,512 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 13:04:18,512 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:04:18,530 INFO L208 MainTranslator]: Completed translation [2022-12-13 13:04:18,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:18 WrapperNode [2022-12-13 13:04:18,531 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 13:04:18,532 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 13:04:18,532 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 13:04:18,532 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 13:04:18,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:18" (1/1) ... [2022-12-13 13:04:18,545 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:18" (1/1) ... [2022-12-13 13:04:18,559 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2022-12-13 13:04:18,559 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 13:04:18,560 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 13:04:18,560 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 13:04:18,560 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 13:04:18,566 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:18" (1/1) ... [2022-12-13 13:04:18,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:18" (1/1) ... [2022-12-13 13:04:18,568 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:18" (1/1) ... [2022-12-13 13:04:18,568 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:18" (1/1) ... [2022-12-13 13:04:18,571 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:18" (1/1) ... [2022-12-13 13:04:18,573 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:18" (1/1) ... [2022-12-13 13:04:18,574 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:18" (1/1) ... [2022-12-13 13:04:18,575 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:18" (1/1) ... [2022-12-13 13:04:18,577 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 13:04:18,577 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 13:04:18,577 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 13:04:18,577 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 13:04:18,578 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:18" (1/1) ... [2022-12-13 13:04:18,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:04:18,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:04:18,602 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 13:04:18,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 13:04:18,637 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-13 13:04:18,637 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-13 13:04:18,637 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-13 13:04:18,637 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-13 13:04:18,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 13:04:18,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 13:04:18,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 13:04:18,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 13:04:18,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 13:04:18,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 13:04:18,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 13:04:18,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 13:04:18,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 13:04:18,640 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 13:04:18,735 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 13:04:18,737 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 13:04:18,891 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 13:04:18,895 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 13:04:18,896 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 13:04:18,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:04:18 BoogieIcfgContainer [2022-12-13 13:04:18,897 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 13:04:18,899 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 13:04:18,899 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 13:04:18,902 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 13:04:18,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 01:04:18" (1/3) ... [2022-12-13 13:04:18,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@248e602d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:04:18, skipping insertion in model container [2022-12-13 13:04:18,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:18" (2/3) ... [2022-12-13 13:04:18,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@248e602d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:04:18, skipping insertion in model container [2022-12-13 13:04:18,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:04:18" (3/3) ... [2022-12-13 13:04:18,904 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-5.i [2022-12-13 13:04:18,918 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 13:04:18,918 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-12-13 13:04:18,918 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 13:04:18,959 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 13:04:18,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 109 transitions, 228 flow [2022-12-13 13:04:19,040 INFO L130 PetriNetUnfolder]: 7/107 cut-off events. [2022-12-13 13:04:19,040 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:04:19,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 107 events. 7/107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 89 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 75. Up to 2 conditions per place. [2022-12-13 13:04:19,045 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 109 transitions, 228 flow [2022-12-13 13:04:19,049 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 107 transitions, 220 flow [2022-12-13 13:04:19,051 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 13:04:19,059 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 107 transitions, 220 flow [2022-12-13 13:04:19,060 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 107 transitions, 220 flow [2022-12-13 13:04:19,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 107 transitions, 220 flow [2022-12-13 13:04:19,077 INFO L130 PetriNetUnfolder]: 7/107 cut-off events. [2022-12-13 13:04:19,077 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:04:19,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 107 events. 7/107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 89 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 75. Up to 2 conditions per place. [2022-12-13 13:04:19,079 INFO L119 LiptonReduction]: Number of co-enabled transitions 2310 [2022-12-13 13:04:22,228 INFO L134 LiptonReduction]: Checked pairs total: 1725 [2022-12-13 13:04:22,228 INFO L136 LiptonReduction]: Total number of compositions: 117 [2022-12-13 13:04:22,239 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:04:22,243 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;@213c78a3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:04:22,243 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-12-13 13:04:22,244 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-12-13 13:04:22,244 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:04:22,244 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:22,245 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-12-13 13:04:22,245 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 13:04:22,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:22,248 INFO L85 PathProgramCache]: Analyzing trace with hash 421, now seen corresponding path program 1 times [2022-12-13 13:04:22,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:22,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127805419] [2022-12-13 13:04:22,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:22,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:22,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:22,327 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 13:04:22,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:04:22,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127805419] [2022-12-13 13:04:22,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127805419] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:04:22,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:04:22,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-13 13:04:22,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581952375] [2022-12-13 13:04:22,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:04:22,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 13:04:22,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:04:22,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 13:04:22,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 13:04:22,353 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 226 [2022-12-13 13:04:22,354 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 2 states, 2 states have (on average 102.5) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 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 13:04:22,354 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:04:22,354 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 226 [2022-12-13 13:04:22,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:04:22,410 INFO L130 PetriNetUnfolder]: 103/161 cut-off events. [2022-12-13 13:04:22,411 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 13:04:22,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 161 events. 103/161 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 401 event pairs, 60 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 324. Up to 162 conditions per place. [2022-12-13 13:04:22,413 INFO L137 encePairwiseOnDemand]: 224/226 looper letters, 16 selfloop transitions, 0 changer transitions 1/17 dead transitions. [2022-12-13 13:04:22,413 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 17 transitions, 74 flow [2022-12-13 13:04:22,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 13:04:22,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 13:04:22,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 223 transitions. [2022-12-13 13:04:22,423 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49336283185840707 [2022-12-13 13:04:22,424 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 223 transitions. [2022-12-13 13:04:22,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 223 transitions. [2022-12-13 13:04:22,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:04:22,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 223 transitions. [2022-12-13 13:04:22,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 111.5) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 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 13:04:22,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 226.0) internal successors, (678), 3 states have internal predecessors, (678), 0 states have call successors, (0), 0 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 13:04:22,432 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 226.0) internal successors, (678), 3 states have internal predecessors, (678), 0 states have call successors, (0), 0 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 13:04:22,433 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 2 states and 223 transitions. [2022-12-13 13:04:22,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 17 transitions, 74 flow [2022-12-13 13:04:22,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 17 transitions, 72 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:04:22,436 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 36 flow [2022-12-13 13:04:22,438 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=36, PETRI_PLACES=20, PETRI_TRANSITIONS=16} [2022-12-13 13:04:22,440 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, -3 predicate places. [2022-12-13 13:04:22,441 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 36 flow [2022-12-13 13:04:22,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 102.5) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 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 13:04:22,441 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:22,441 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 13:04:22,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 13:04:22,441 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 13:04:22,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:22,442 INFO L85 PathProgramCache]: Analyzing trace with hash 411490, now seen corresponding path program 1 times [2022-12-13 13:04:22,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:22,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859210944] [2022-12-13 13:04:22,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:22,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:22,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:22,544 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 13:04:22,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:04:22,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859210944] [2022-12-13 13:04:22,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859210944] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:04:22,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:04:22,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:04:22,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962754422] [2022-12-13 13:04:22,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:04:22,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:04:22,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:04:22,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:04:22,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:04:22,573 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 226 [2022-12-13 13:04:22,574 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 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 13:04:22,574 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:04:22,574 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 226 [2022-12-13 13:04:22,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:04:22,612 INFO L130 PetriNetUnfolder]: 82/128 cut-off events. [2022-12-13 13:04:22,612 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:04:22,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 128 events. 82/128 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 285 event pairs, 34 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 264. Up to 101 conditions per place. [2022-12-13 13:04:22,613 INFO L137 encePairwiseOnDemand]: 223/226 looper letters, 19 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2022-12-13 13:04:22,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 21 transitions, 88 flow [2022-12-13 13:04:22,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:04:22,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:04:22,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 307 transitions. [2022-12-13 13:04:22,615 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4528023598820059 [2022-12-13 13:04:22,615 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 307 transitions. [2022-12-13 13:04:22,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 307 transitions. [2022-12-13 13:04:22,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:04:22,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 307 transitions. [2022-12-13 13:04:22,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 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 13:04:22,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 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 13:04:22,618 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 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 13:04:22,618 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 36 flow. Second operand 3 states and 307 transitions. [2022-12-13 13:04:22,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 21 transitions, 88 flow [2022-12-13 13:04:22,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 13:04:22,619 INFO L231 Difference]: Finished difference. Result has 20 places, 15 transitions, 38 flow [2022-12-13 13:04:22,619 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=38, PETRI_PLACES=20, PETRI_TRANSITIONS=15} [2022-12-13 13:04:22,620 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, -3 predicate places. [2022-12-13 13:04:22,620 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 15 transitions, 38 flow [2022-12-13 13:04:22,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 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 13:04:22,620 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:22,620 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 13:04:22,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 13:04:22,620 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 13:04:22,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:22,621 INFO L85 PathProgramCache]: Analyzing trace with hash 411488, now seen corresponding path program 1 times [2022-12-13 13:04:22,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:22,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415796812] [2022-12-13 13:04:22,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:22,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:22,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:22,723 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 13:04:22,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:04:22,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415796812] [2022-12-13 13:04:22,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415796812] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:04:22,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:04:22,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:04:22,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056538246] [2022-12-13 13:04:22,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:04:22,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:04:22,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:04:22,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:04:22,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:04:22,745 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 226 [2022-12-13 13:04:22,746 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 38 flow. Second operand has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 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 13:04:22,746 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:04:22,746 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 226 [2022-12-13 13:04:22,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:04:22,785 INFO L130 PetriNetUnfolder]: 79/122 cut-off events. [2022-12-13 13:04:22,786 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 13:04:22,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 122 events. 79/122 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 259 event pairs, 32 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 262. Up to 95 conditions per place. [2022-12-13 13:04:22,787 INFO L137 encePairwiseOnDemand]: 223/226 looper letters, 18 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2022-12-13 13:04:22,787 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 20 transitions, 88 flow [2022-12-13 13:04:22,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:04:22,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:04:22,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 315 transitions. [2022-12-13 13:04:22,789 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4646017699115044 [2022-12-13 13:04:22,790 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 315 transitions. [2022-12-13 13:04:22,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 315 transitions. [2022-12-13 13:04:22,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:04:22,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 315 transitions. [2022-12-13 13:04:22,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 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 13:04:22,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 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 13:04:22,794 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 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 13:04:22,794 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 38 flow. Second operand 3 states and 315 transitions. [2022-12-13 13:04:22,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 20 transitions, 88 flow [2022-12-13 13:04:22,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 20 transitions, 84 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:04:22,795 INFO L231 Difference]: Finished difference. Result has 19 places, 14 transitions, 36 flow [2022-12-13 13:04:22,795 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=36, PETRI_PLACES=19, PETRI_TRANSITIONS=14} [2022-12-13 13:04:22,796 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, -4 predicate places. [2022-12-13 13:04:22,796 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 14 transitions, 36 flow [2022-12-13 13:04:22,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 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 13:04:22,797 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:22,797 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 13:04:22,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 13:04:22,797 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 13:04:22,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:22,798 INFO L85 PathProgramCache]: Analyzing trace with hash -625957232, now seen corresponding path program 1 times [2022-12-13 13:04:22,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:22,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588330080] [2022-12-13 13:04:22,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:22,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:22,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:22,853 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 13:04:22,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:04:22,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588330080] [2022-12-13 13:04:22,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588330080] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:04:22,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:04:22,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:04:22,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911189668] [2022-12-13 13:04:22,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:04:22,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:04:22,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:04:22,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:04:22,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:04:22,862 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 226 [2022-12-13 13:04:22,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 14 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 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 13:04:22,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:04:22,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 226 [2022-12-13 13:04:22,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:04:22,909 INFO L130 PetriNetUnfolder]: 97/149 cut-off events. [2022-12-13 13:04:22,909 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 13:04:22,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 149 events. 97/149 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 331 event pairs, 20 based on Foata normal form. 9/117 useless extension candidates. Maximal degree in co-relation 316. Up to 91 conditions per place. [2022-12-13 13:04:22,911 INFO L137 encePairwiseOnDemand]: 222/226 looper letters, 19 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2022-12-13 13:04:22,911 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 21 transitions, 92 flow [2022-12-13 13:04:22,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:04:22,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:04:22,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 317 transitions. [2022-12-13 13:04:22,913 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46755162241887904 [2022-12-13 13:04:22,913 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 317 transitions. [2022-12-13 13:04:22,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 317 transitions. [2022-12-13 13:04:22,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:04:22,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 317 transitions. [2022-12-13 13:04:22,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 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 13:04:22,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 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 13:04:22,917 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 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 13:04:22,917 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 36 flow. Second operand 3 states and 317 transitions. [2022-12-13 13:04:22,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 21 transitions, 92 flow [2022-12-13 13:04:22,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:04:22,918 INFO L231 Difference]: Finished difference. Result has 20 places, 15 transitions, 46 flow [2022-12-13 13:04:22,918 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=20, PETRI_TRANSITIONS=15} [2022-12-13 13:04:22,919 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, -3 predicate places. [2022-12-13 13:04:22,919 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 15 transitions, 46 flow [2022-12-13 13:04:22,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 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 13:04:22,919 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:22,919 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:04:22,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 13:04:22,920 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 13:04:22,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:22,920 INFO L85 PathProgramCache]: Analyzing trace with hash 2070162338, now seen corresponding path program 1 times [2022-12-13 13:04:22,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:22,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509469498] [2022-12-13 13:04:22,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:22,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:22,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:22,977 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 13:04:22,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:04:22,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509469498] [2022-12-13 13:04:22,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509469498] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:04:22,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982016581] [2022-12-13 13:04:22,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:22,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:04:22,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:04:22,979 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:04:22,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 13:04:23,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:23,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 13:04:23,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:04:23,062 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 13:04:23,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:04:23,075 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 13:04:23,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982016581] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:04:23,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:04:23,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 13:04:23,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161245453] [2022-12-13 13:04:23,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:04:23,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 13:04:23,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:04:23,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 13:04:23,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 13:04:23,092 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 226 [2022-12-13 13:04:23,093 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 46 flow. Second operand has 7 states, 7 states have (on average 98.71428571428571) internal successors, (691), 7 states have internal predecessors, (691), 0 states have call successors, (0), 0 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 13:04:23,093 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:04:23,093 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 226 [2022-12-13 13:04:23,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:04:23,166 INFO L130 PetriNetUnfolder]: 151/230 cut-off events. [2022-12-13 13:04:23,167 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 13:04:23,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 546 conditions, 230 events. 151/230 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 526 event pairs, 20 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 541. Up to 91 conditions per place. [2022-12-13 13:04:23,168 INFO L137 encePairwiseOnDemand]: 222/226 looper letters, 37 selfloop transitions, 5 changer transitions 0/42 dead transitions. [2022-12-13 13:04:23,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 42 transitions, 190 flow [2022-12-13 13:04:23,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:04:23,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 13:04:23,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 630 transitions. [2022-12-13 13:04:23,170 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4646017699115044 [2022-12-13 13:04:23,170 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 630 transitions. [2022-12-13 13:04:23,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 630 transitions. [2022-12-13 13:04:23,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:04:23,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 630 transitions. [2022-12-13 13:04:23,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 105.0) internal successors, (630), 6 states have internal predecessors, (630), 0 states have call successors, (0), 0 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 13:04:23,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 226.0) internal successors, (1582), 7 states have internal predecessors, (1582), 0 states have call successors, (0), 0 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 13:04:23,173 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 226.0) internal successors, (1582), 7 states have internal predecessors, (1582), 0 states have call successors, (0), 0 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 13:04:23,173 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 46 flow. Second operand 6 states and 630 transitions. [2022-12-13 13:04:23,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 42 transitions, 190 flow [2022-12-13 13:04:23,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 42 transitions, 188 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:04:23,174 INFO L231 Difference]: Finished difference. Result has 27 places, 18 transitions, 86 flow [2022-12-13 13:04:23,175 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=86, PETRI_PLACES=27, PETRI_TRANSITIONS=18} [2022-12-13 13:04:23,175 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 4 predicate places. [2022-12-13 13:04:23,175 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 18 transitions, 86 flow [2022-12-13 13:04:23,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 98.71428571428571) internal successors, (691), 7 states have internal predecessors, (691), 0 states have call successors, (0), 0 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 13:04:23,175 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:23,176 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-13 13:04:23,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 13:04:23,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:04:23,376 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 13:04:23,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:23,377 INFO L85 PathProgramCache]: Analyzing trace with hash 770857744, now seen corresponding path program 2 times [2022-12-13 13:04:23,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:23,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615677905] [2022-12-13 13:04:23,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:23,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:23,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:23,460 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 13:04:23,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:04:23,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615677905] [2022-12-13 13:04:23,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615677905] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:04:23,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838587694] [2022-12-13 13:04:23,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:04:23,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:04:23,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:04:23,462 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:04:23,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 13:04:23,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 13:04:23,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:04:23,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 13:04:23,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:04:23,619 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 13:04:23,619 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:04:23,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838587694] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:04:23,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 13:04:23,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2022-12-13 13:04:23,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117990874] [2022-12-13 13:04:23,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:04:23,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:04:23,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:04:23,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:04:23,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:04:23,672 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 226 [2022-12-13 13:04:23,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 18 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 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 13:04:23,673 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:04:23,673 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 226 [2022-12-13 13:04:23,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:04:23,709 INFO L130 PetriNetUnfolder]: 133/203 cut-off events. [2022-12-13 13:04:23,709 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2022-12-13 13:04:23,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 577 conditions, 203 events. 133/203 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 444 event pairs, 80 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 569. Up to 203 conditions per place. [2022-12-13 13:04:23,710 INFO L137 encePairwiseOnDemand]: 224/226 looper letters, 16 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2022-12-13 13:04:23,711 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 17 transitions, 110 flow [2022-12-13 13:04:23,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:04:23,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:04:23,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 290 transitions. [2022-12-13 13:04:23,712 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4277286135693215 [2022-12-13 13:04:23,712 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 290 transitions. [2022-12-13 13:04:23,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 290 transitions. [2022-12-13 13:04:23,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:04:23,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 290 transitions. [2022-12-13 13:04:23,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 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 13:04:23,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 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 13:04:23,714 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 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 13:04:23,714 INFO L175 Difference]: Start difference. First operand has 27 places, 18 transitions, 86 flow. Second operand 3 states and 290 transitions. [2022-12-13 13:04:23,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 17 transitions, 110 flow [2022-12-13 13:04:23,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 17 transitions, 96 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 13:04:23,715 INFO L231 Difference]: Finished difference. Result has 27 places, 17 transitions, 64 flow [2022-12-13 13:04:23,716 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=25, 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=64, PETRI_PLACES=27, PETRI_TRANSITIONS=17} [2022-12-13 13:04:23,716 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 4 predicate places. [2022-12-13 13:04:23,716 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 64 flow [2022-12-13 13:04:23,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 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 13:04:23,716 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:23,716 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-13 13:04:23,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 13:04:23,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:04:23,917 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 13:04:23,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:23,918 INFO L85 PathProgramCache]: Analyzing trace with hash 770857736, now seen corresponding path program 1 times [2022-12-13 13:04:23,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:23,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142685413] [2022-12-13 13:04:23,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:23,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:23,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:23,994 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 13:04:23,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:04:23,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142685413] [2022-12-13 13:04:23,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142685413] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:04:23,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450506820] [2022-12-13 13:04:23,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:23,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:04:23,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:04:23,996 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:04:23,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 13:04:24,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:24,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 13:04:24,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:04:24,067 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 13:04:24,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:04:24,107 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 13:04:24,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450506820] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:04:24,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:04:24,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 13:04:24,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553963875] [2022-12-13 13:04:24,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:04:24,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 13:04:24,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:04:24,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 13:04:24,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 13:04:24,126 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 226 [2022-12-13 13:04:24,127 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 17 transitions, 64 flow. Second operand has 13 states, 13 states have (on average 98.38461538461539) internal successors, (1279), 13 states have internal predecessors, (1279), 0 states have call successors, (0), 0 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 13:04:24,127 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:04:24,127 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 226 [2022-12-13 13:04:24,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:04:24,264 INFO L130 PetriNetUnfolder]: 241/365 cut-off events. [2022-12-13 13:04:24,264 INFO L131 PetriNetUnfolder]: For 240/240 co-relation queries the response was YES. [2022-12-13 13:04:24,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 956 conditions, 365 events. 241/365 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 843 event pairs, 20 based on Foata normal form. 54/339 useless extension candidates. Maximal degree in co-relation 947. Up to 82 conditions per place. [2022-12-13 13:04:24,267 INFO L137 encePairwiseOnDemand]: 223/226 looper letters, 72 selfloop transitions, 11 changer transitions 0/83 dead transitions. [2022-12-13 13:04:24,267 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 83 transitions, 386 flow [2022-12-13 13:04:24,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 13:04:24,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 13:04:24,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1253 transitions. [2022-12-13 13:04:24,270 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46202064896755163 [2022-12-13 13:04:24,270 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1253 transitions. [2022-12-13 13:04:24,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1253 transitions. [2022-12-13 13:04:24,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:04:24,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1253 transitions. [2022-12-13 13:04:24,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 104.41666666666667) internal successors, (1253), 12 states have internal predecessors, (1253), 0 states have call successors, (0), 0 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 13:04:24,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 226.0) internal successors, (2938), 13 states have internal predecessors, (2938), 0 states have call successors, (0), 0 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 13:04:24,279 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 226.0) internal successors, (2938), 13 states have internal predecessors, (2938), 0 states have call successors, (0), 0 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 13:04:24,279 INFO L175 Difference]: Start difference. First operand has 27 places, 17 transitions, 64 flow. Second operand 12 states and 1253 transitions. [2022-12-13 13:04:24,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 83 transitions, 386 flow [2022-12-13 13:04:24,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 83 transitions, 385 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:04:24,282 INFO L231 Difference]: Finished difference. Result has 43 places, 23 transitions, 147 flow [2022-12-13 13:04:24,282 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=147, PETRI_PLACES=43, PETRI_TRANSITIONS=23} [2022-12-13 13:04:24,283 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 20 predicate places. [2022-12-13 13:04:24,283 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 23 transitions, 147 flow [2022-12-13 13:04:24,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 98.38461538461539) internal successors, (1279), 13 states have internal predecessors, (1279), 0 states have call successors, (0), 0 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 13:04:24,284 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:24,284 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-12-13 13:04:24,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 13:04:24,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 13:04:24,485 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 13:04:24,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:24,486 INFO L85 PathProgramCache]: Analyzing trace with hash -300928568, now seen corresponding path program 2 times [2022-12-13 13:04:24,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:24,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549995836] [2022-12-13 13:04:24,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:24,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:24,623 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:04:24,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:04:24,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549995836] [2022-12-13 13:04:24,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549995836] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:04:24,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197713998] [2022-12-13 13:04:24,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:04:24,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:04:24,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:04:24,625 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:04:24,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 13:04:24,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:04:24,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:04:24,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:04:24,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:04:24,711 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:04:24,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:04:24,778 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:04:24,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197713998] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:04:24,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:04:24,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 14 [2022-12-13 13:04:24,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750377470] [2022-12-13 13:04:24,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:04:24,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 13:04:24,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:04:24,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 13:04:24,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2022-12-13 13:04:24,801 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 226 [2022-12-13 13:04:24,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 23 transitions, 147 flow. Second operand has 15 states, 15 states have (on average 98.4) internal successors, (1476), 15 states have internal predecessors, (1476), 0 states have call successors, (0), 0 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 13:04:24,803 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:04:24,803 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 226 [2022-12-13 13:04:24,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:04:24,932 INFO L130 PetriNetUnfolder]: 277/419 cut-off events. [2022-12-13 13:04:24,932 INFO L131 PetriNetUnfolder]: For 963/963 co-relation queries the response was YES. [2022-12-13 13:04:24,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1332 conditions, 419 events. 277/419 cut-off events. For 963/963 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 976 event pairs, 20 based on Foata normal form. 18/345 useless extension candidates. Maximal degree in co-relation 1317. Up to 100 conditions per place. [2022-12-13 13:04:24,934 INFO L137 encePairwiseOnDemand]: 223/226 looper letters, 84 selfloop transitions, 13 changer transitions 0/97 dead transitions. [2022-12-13 13:04:24,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 97 transitions, 501 flow [2022-12-13 13:04:24,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 13:04:24,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 13:04:24,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1457 transitions. [2022-12-13 13:04:24,936 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4604930467762326 [2022-12-13 13:04:24,936 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1457 transitions. [2022-12-13 13:04:24,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1457 transitions. [2022-12-13 13:04:24,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:04:24,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1457 transitions. [2022-12-13 13:04:24,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 104.07142857142857) internal successors, (1457), 14 states have internal predecessors, (1457), 0 states have call successors, (0), 0 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 13:04:24,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 226.0) internal successors, (3390), 15 states have internal predecessors, (3390), 0 states have call successors, (0), 0 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 13:04:24,942 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 226.0) internal successors, (3390), 15 states have internal predecessors, (3390), 0 states have call successors, (0), 0 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 13:04:24,942 INFO L175 Difference]: Start difference. First operand has 43 places, 23 transitions, 147 flow. Second operand 14 states and 1457 transitions. [2022-12-13 13:04:24,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 97 transitions, 501 flow [2022-12-13 13:04:24,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 97 transitions, 449 flow, removed 21 selfloop flow, removed 5 redundant places. [2022-12-13 13:04:24,946 INFO L231 Difference]: Finished difference. Result has 53 places, 25 transitions, 147 flow [2022-12-13 13:04:24,946 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=147, PETRI_PLACES=53, PETRI_TRANSITIONS=25} [2022-12-13 13:04:24,946 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 30 predicate places. [2022-12-13 13:04:24,946 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 25 transitions, 147 flow [2022-12-13 13:04:24,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 98.4) internal successors, (1476), 15 states have internal predecessors, (1476), 0 states have call successors, (0), 0 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 13:04:24,947 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:24,947 INFO L209 CegarLoopForPetriNet]: trace histogram [12, 1, 1, 1, 1, 1, 1] [2022-12-13 13:04:24,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 13:04:25,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-13 13:04:25,148 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 13:04:25,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:25,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1429535736, now seen corresponding path program 3 times [2022-12-13 13:04:25,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:25,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583974003] [2022-12-13 13:04:25,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:25,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:25,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:25,678 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:04:25,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:04:25,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583974003] [2022-12-13 13:04:25,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583974003] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:04:25,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869655330] [2022-12-13 13:04:25,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 13:04:25,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:04:25,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:04:25,680 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:04:25,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 13:04:25,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-13 13:04:25,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:04:25,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-13 13:04:25,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:04:26,093 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:04:26,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:04:26,616 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:04:26,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869655330] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:04:26,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:04:26,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2022-12-13 13:04:26,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004569417] [2022-12-13 13:04:26,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:04:26,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-13 13:04:26,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:04:26,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-13 13:04:26,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=1330, Unknown=0, NotChecked=0, Total=1640 [2022-12-13 13:04:27,072 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 226 [2022-12-13 13:04:27,074 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 25 transitions, 147 flow. Second operand has 41 states, 41 states have (on average 93.3170731707317) internal successors, (3826), 41 states have internal predecessors, (3826), 0 states have call successors, (0), 0 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 13:04:27,074 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:04:27,074 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 226 [2022-12-13 13:04:27,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:04:33,342 INFO L130 PetriNetUnfolder]: 12587/18888 cut-off events. [2022-12-13 13:04:33,343 INFO L131 PetriNetUnfolder]: For 54302/54302 co-relation queries the response was YES. [2022-12-13 13:04:33,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59604 conditions, 18888 events. 12587/18888 cut-off events. For 54302/54302 co-relation queries the response was YES. Maximal size of possible extension queue 689. Compared 116163 event pairs, 65 based on Foata normal form. 113/14295 useless extension candidates. Maximal degree in co-relation 59587. Up to 3940 conditions per place. [2022-12-13 13:04:33,447 INFO L137 encePairwiseOnDemand]: 221/226 looper letters, 529 selfloop transitions, 901 changer transitions 0/1430 dead transitions. [2022-12-13 13:04:33,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 1430 transitions, 11092 flow [2022-12-13 13:04:33,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-12-13 13:04:33,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2022-12-13 13:04:33,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 10597 transitions. [2022-12-13 13:04:33,465 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44235264651861744 [2022-12-13 13:04:33,465 INFO L72 ComplementDD]: Start complementDD. Operand 106 states and 10597 transitions. [2022-12-13 13:04:33,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 10597 transitions. [2022-12-13 13:04:33,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:04:33,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 106 states and 10597 transitions. [2022-12-13 13:04:33,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 107 states, 106 states have (on average 99.97169811320755) internal successors, (10597), 106 states have internal predecessors, (10597), 0 states have call successors, (0), 0 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 13:04:33,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 107 states, 107 states have (on average 226.0) internal successors, (24182), 107 states have internal predecessors, (24182), 0 states have call successors, (0), 0 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 13:04:33,535 INFO L81 ComplementDD]: Finished complementDD. Result has 107 states, 107 states have (on average 226.0) internal successors, (24182), 107 states have internal predecessors, (24182), 0 states have call successors, (0), 0 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 13:04:33,535 INFO L175 Difference]: Start difference. First operand has 53 places, 25 transitions, 147 flow. Second operand 106 states and 10597 transitions. [2022-12-13 13:04:33,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 1430 transitions, 11092 flow [2022-12-13 13:04:33,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 1430 transitions, 9002 flow, removed 597 selfloop flow, removed 11 redundant places. [2022-12-13 13:04:33,776 INFO L231 Difference]: Finished difference. Result has 163 places, 926 transitions, 5609 flow [2022-12-13 13:04:33,776 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=106, PETRI_FLOW=5609, PETRI_PLACES=163, PETRI_TRANSITIONS=926} [2022-12-13 13:04:33,776 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 140 predicate places. [2022-12-13 13:04:33,777 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 926 transitions, 5609 flow [2022-12-13 13:04:33,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 93.3170731707317) internal successors, (3826), 41 states have internal predecessors, (3826), 0 states have call successors, (0), 0 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 13:04:33,778 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:33,778 INFO L209 CegarLoopForPetriNet]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:04:33,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 13:04:33,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:04:33,980 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 13:04:33,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:33,981 INFO L85 PathProgramCache]: Analyzing trace with hash 681242974, now seen corresponding path program 1 times [2022-12-13 13:04:33,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:33,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37594505] [2022-12-13 13:04:33,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:33,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:34,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:34,597 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:04:34,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:04:34,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37594505] [2022-12-13 13:04:34,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37594505] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:04:34,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433610017] [2022-12-13 13:04:34,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:34,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:04:34,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:04:34,599 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:04:34,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 13:04:34,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:34,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-13 13:04:34,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:04:35,124 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:04:35,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:04:35,686 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:04:35,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433610017] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:04:35,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:04:35,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2022-12-13 13:04:35,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907276164] [2022-12-13 13:04:35,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:04:35,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-13 13:04:35,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:04:35,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-13 13:04:35,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1821, Unknown=0, NotChecked=0, Total=2162 [2022-12-13 13:04:36,192 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 226 [2022-12-13 13:04:36,196 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 926 transitions, 5609 flow. Second operand has 47 states, 47 states have (on average 93.34042553191489) internal successors, (4387), 47 states have internal predecessors, (4387), 0 states have call successors, (0), 0 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 13:04:36,196 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:04:36,196 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 226 [2022-12-13 13:04:36,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:05:28,575 INFO L130 PetriNetUnfolder]: 169295/253828 cut-off events. [2022-12-13 13:05:28,575 INFO L131 PetriNetUnfolder]: For 6063953/6063953 co-relation queries the response was YES. [2022-12-13 13:05:29,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1074936 conditions, 253828 events. 169295/253828 cut-off events. For 6063953/6063953 co-relation queries the response was YES. Maximal size of possible extension queue 11954. Compared 2237288 event pairs, 3799 based on Foata normal form. 4266/258094 useless extension candidates. Maximal degree in co-relation 1074903. Up to 48060 conditions per place. [2022-12-13 13:05:30,774 INFO L137 encePairwiseOnDemand]: 221/226 looper letters, 1847 selfloop transitions, 24522 changer transitions 0/26369 dead transitions. [2022-12-13 13:05:30,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 26369 transitions, 205413 flow [2022-12-13 13:05:30,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 246 states. [2022-12-13 13:05:30,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2022-12-13 13:05:30,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 24349 transitions. [2022-12-13 13:05:30,803 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4379631628174689 [2022-12-13 13:05:30,803 INFO L72 ComplementDD]: Start complementDD. Operand 246 states and 24349 transitions. [2022-12-13 13:05:30,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 246 states and 24349 transitions. [2022-12-13 13:05:30,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:05:30,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 246 states and 24349 transitions. [2022-12-13 13:05:30,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 247 states, 246 states have (on average 98.97967479674797) internal successors, (24349), 246 states have internal predecessors, (24349), 0 states have call successors, (0), 0 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 13:05:30,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 247 states, 247 states have (on average 226.0) internal successors, (55822), 247 states have internal predecessors, (55822), 0 states have call successors, (0), 0 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 13:05:30,888 INFO L81 ComplementDD]: Finished complementDD. Result has 247 states, 247 states have (on average 226.0) internal successors, (55822), 247 states have internal predecessors, (55822), 0 states have call successors, (0), 0 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 13:05:30,889 INFO L175 Difference]: Start difference. First operand has 163 places, 926 transitions, 5609 flow. Second operand 246 states and 24349 transitions. [2022-12-13 13:05:30,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 26369 transitions, 205413 flow [2022-12-13 13:10:36,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 26369 transitions, 203293 flow, removed 1060 selfloop flow, removed 0 redundant places. [2022-12-13 13:10:36,574 INFO L231 Difference]: Finished difference. Result has 468 places, 25384 transitions, 203832 flow [2022-12-13 13:10:36,575 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=5497, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=926, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=874, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=246, PETRI_FLOW=203832, PETRI_PLACES=468, PETRI_TRANSITIONS=25384} [2022-12-13 13:10:36,576 INFO L288 CegarLoopForPetriNet]: 23 programPoint places, 445 predicate places. [2022-12-13 13:10:36,576 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 25384 transitions, 203832 flow [2022-12-13 13:10:36,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 93.34042553191489) internal successors, (4387), 47 states have internal predecessors, (4387), 0 states have call successors, (0), 0 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 13:10:36,577 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:10:36,577 INFO L209 CegarLoopForPetriNet]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:10:36,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 13:10:36,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 13:10:36,778 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-13 13:10:36,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:10:36,779 INFO L85 PathProgramCache]: Analyzing trace with hash 748822018, now seen corresponding path program 1 times [2022-12-13 13:10:36,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:10:36,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832243447] [2022-12-13 13:10:36,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:10:36,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:10:36,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:10:37,428 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:10:37,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:10:37,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832243447] [2022-12-13 13:10:37,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832243447] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:10:37,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410796662] [2022-12-13 13:10:37,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:10:37,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:10:37,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:10:37,430 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:10:37,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7c0ddb-ec2c-43b4-b559-985d15eb678b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 13:10:37,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:10:37,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-13 13:10:37,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:10:37,871 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:10:37,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:10:38,413 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:10:38,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410796662] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:10:38,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:10:38,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2022-12-13 13:10:38,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156908540] [2022-12-13 13:10:38,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:10:38,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-13 13:10:38,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:10:38,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-13 13:10:38,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1821, Unknown=0, NotChecked=0, Total=2162 [2022-12-13 13:10:39,081 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 226 [2022-12-13 13:10:39,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 25384 transitions, 203832 flow. Second operand has 47 states, 47 states have (on average 93.34042553191489) internal successors, (4387), 47 states have internal predecessors, (4387), 0 states have call successors, (0), 0 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 13:10:39,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:10:39,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 226 [2022-12-13 13:10:39,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand