./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/fib_safe-11.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/fib_safe-11.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 67ab3b79be699544cc101a76da66f98a1e0e6116d5865ddc6f998abd49388964 --- 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 [2022-12-14 13:36:57,616 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:36:57,618 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:36:57,631 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:36:57,631 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:36:57,632 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:36:57,633 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:36:57,634 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:36:57,635 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:36:57,636 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:36:57,636 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:36:57,637 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:36:57,637 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:36:57,638 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:36:57,639 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:36:57,640 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:36:57,640 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:36:57,641 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:36:57,642 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:36:57,643 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:36:57,644 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:36:57,646 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:36:57,647 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:36:57,648 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:36:57,652 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:36:57,652 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:36:57,652 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:36:57,653 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:36:57,654 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:36:57,655 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:36:57,655 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:36:57,656 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:36:57,656 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:36:57,657 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:36:57,658 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:36:57,658 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:36:57,659 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:36:57,659 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:36:57,660 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:36:57,660 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:36:57,661 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:36:57,662 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 13:36:57,686 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:36:57,686 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:36:57,686 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:36:57,686 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:36:57,687 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:36:57,687 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:36:57,688 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:36:57,688 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:36:57,688 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:36:57,688 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 13:36:57,688 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:36:57,689 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:36:57,689 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 13:36:57,689 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 13:36:57,689 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:36:57,689 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 13:36:57,690 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 13:36:57,690 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 13:36:57,690 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 13:36:57,691 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 13:36:57,691 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:36:57,691 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:36:57,691 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 13:36:57,691 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:36:57,692 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:36:57,692 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:36:57,692 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 13:36:57,692 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 13:36:57,692 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 13:36:57,692 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:36:57,693 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 13:36:57,693 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:36:57,693 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:36:57,693 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:36:57,693 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:36:57,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:36:57,694 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:36:57,694 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 13:36:57,694 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:36:57,694 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 13:36:57,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 13:36:57,695 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:36:57,695 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67ab3b79be699544cc101a76da66f98a1e0e6116d5865ddc6f998abd49388964 [2022-12-14 13:36:57,892 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:36:57,912 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:36:57,914 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:36:57,916 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:36:57,916 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:36:57,917 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/pthread/fib_safe-11.i [2022-12-14 13:37:00,479 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:37:00,631 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:37:00,632 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/sv-benchmarks/c/pthread/fib_safe-11.i [2022-12-14 13:37:00,641 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/data/5b46a8b05/d7fb43337be24ae3900d1071115c2f17/FLAG59ddfabf1 [2022-12-14 13:37:00,651 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/data/5b46a8b05/d7fb43337be24ae3900d1071115c2f17 [2022-12-14 13:37:00,653 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:37:00,654 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:37:00,655 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:37:00,655 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:37:00,658 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:37:00,659 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:37:00" (1/1) ... [2022-12-14 13:37:00,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75f0e638 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:37:00, skipping insertion in model container [2022-12-14 13:37:00,660 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:37:00" (1/1) ... [2022-12-14 13:37:00,666 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:37:00,703 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:37:00,896 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_35d7f914-1698-4231-ac89-aec29c35c2d7/sv-benchmarks/c/pthread/fib_safe-11.i[30241,30254] [2022-12-14 13:37:00,903 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:37:00,903 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:37:00,906 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:37:00,906 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:37:00,909 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:37:00,909 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:37:00,909 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:37:00,910 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:37:00,912 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:37:00,913 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:37:00,914 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:37:00,921 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:37:00,945 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_35d7f914-1698-4231-ac89-aec29c35c2d7/sv-benchmarks/c/pthread/fib_safe-11.i[30241,30254] [2022-12-14 13:37:00,946 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:37:00,946 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:37:00,947 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:37:00,948 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:37:00,950 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:37:00,950 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:37:00,950 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:37:00,950 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:37:00,952 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 13:37:00,952 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 13:37:00,953 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:37:00,974 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:37:00,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:37:00 WrapperNode [2022-12-14 13:37:00,974 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:37:00,975 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:37:00,975 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:37:00,975 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:37:00,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:37:00" (1/1) ... [2022-12-14 13:37:00,990 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:37:00" (1/1) ... [2022-12-14 13:37:01,011 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2022-12-14 13:37:01,011 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:37:01,012 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:37:01,012 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:37:01,012 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:37:01,018 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:37:00" (1/1) ... [2022-12-14 13:37:01,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:37:00" (1/1) ... [2022-12-14 13:37:01,020 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:37:00" (1/1) ... [2022-12-14 13:37:01,020 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:37:00" (1/1) ... [2022-12-14 13:37:01,023 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:37:00" (1/1) ... [2022-12-14 13:37:01,026 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:37:00" (1/1) ... [2022-12-14 13:37:01,027 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:37:00" (1/1) ... [2022-12-14 13:37:01,028 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:37:00" (1/1) ... [2022-12-14 13:37:01,029 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:37:01,030 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:37:01,030 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:37:01,030 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:37:01,031 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:37:00" (1/1) ... [2022-12-14 13:37:01,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:37:01,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:37:01,062 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:37:01,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:37:01,094 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-14 13:37:01,094 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-14 13:37:01,094 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-14 13:37:01,094 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-14 13:37:01,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 13:37:01,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-14 13:37:01,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 13:37:01,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 13:37:01,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 13:37:01,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 13:37:01,095 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-14 13:37:01,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:37:01,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:37:01,097 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-14 13:37:01,206 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:37:01,208 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:37:01,375 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:37:01,381 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:37:01,381 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 13:37:01,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:37:01 BoogieIcfgContainer [2022-12-14 13:37:01,383 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:37:01,384 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:37:01,385 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:37:01,387 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:37:01,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:37:00" (1/3) ... [2022-12-14 13:37:01,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b73fcf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:37:01, skipping insertion in model container [2022-12-14 13:37:01,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:37:00" (2/3) ... [2022-12-14 13:37:01,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b73fcf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:37:01, skipping insertion in model container [2022-12-14 13:37:01,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:37:01" (3/3) ... [2022-12-14 13:37:01,389 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-11.i [2022-12-14 13:37:01,404 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:37:01,404 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-12-14 13:37:01,404 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 13:37:01,443 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 13:37:01,467 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 13:37:01,478 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 109 transitions, 228 flow [2022-12-14 13:37:01,480 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 109 transitions, 228 flow [2022-12-14 13:37:01,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 109 transitions, 228 flow [2022-12-14 13:37:01,524 INFO L130 PetriNetUnfolder]: 7/107 cut-off events. [2022-12-14 13:37:01,524 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-14 13:37:01,530 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. [2022-12-14 13:37:01,532 INFO L119 LiptonReduction]: Number of co-enabled transitions 2310 [2022-12-14 13:37:04,541 INFO L134 LiptonReduction]: Checked pairs total: 1750 [2022-12-14 13:37:04,541 INFO L136 LiptonReduction]: Total number of compositions: 111 [2022-12-14 13:37:04,549 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 21 transitions, 52 flow [2022-12-14 13:37:04,564 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 52 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 51 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:37:04,580 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:37:04,585 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=FINITE_AUTOMATA, 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;@6a93a57b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:37:04,585 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-12-14 13:37:04,587 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 51 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:37:04,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-12-14 13:37:04,591 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:37:04,592 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-12-14 13:37:04,592 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)] === [2022-12-14 13:37:04,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:37:04,597 INFO L85 PathProgramCache]: Analyzing trace with hash 415, now seen corresponding path program 1 times [2022-12-14 13:37:04,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:37:04,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983754614] [2022-12-14 13:37:04,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:37:04,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:37:04,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:37:04,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:37:04,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:37:04,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983754614] [2022-12-14 13:37:04,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983754614] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:37:04,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:37:04,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-14 13:37:04,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480006822] [2022-12-14 13:37:04,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:37:04,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 13:37:04,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:37:04,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 13:37:04,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 13:37:04,705 INFO L87 Difference]: Start difference. First operand has 52 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 51 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:37:04,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:37:04,736 INFO L93 Difference]: Finished difference Result 50 states and 134 transitions. [2022-12-14 13:37:04,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 13:37:04,738 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1 [2022-12-14 13:37:04,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:37:04,744 INFO L225 Difference]: With dead ends: 50 [2022-12-14 13:37:04,744 INFO L226 Difference]: Without dead ends: 50 [2022-12-14 13:37:04,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 13:37:04,747 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:37:04,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:37:04,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-14 13:37:04,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-12-14 13:37:04,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 46 states have (on average 2.9130434782608696) internal successors, (134), 49 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:37:04,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 134 transitions. [2022-12-14 13:37:04,773 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 134 transitions. Word has length 1 [2022-12-14 13:37:04,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:37:04,773 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 134 transitions. [2022-12-14 13:37:04,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:37:04,774 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 134 transitions. [2022-12-14 13:37:04,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 13:37:04,774 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:37:04,774 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 13:37:04,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 13:37:04,774 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-14 13:37:04,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:37:04,775 INFO L85 PathProgramCache]: Analyzing trace with hash 409561, now seen corresponding path program 1 times [2022-12-14 13:37:04,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:37:04,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059406777] [2022-12-14 13:37:04,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:37:04,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:37:04,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:37:04,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:37:04,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:37:04,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059406777] [2022-12-14 13:37:04,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059406777] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:37:04,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:37:04,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 13:37:04,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882992922] [2022-12-14 13:37:04,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:37:04,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:37:04,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:37:04,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:37:04,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:37:04,935 INFO L87 Difference]: Start difference. First operand 50 states and 134 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:37:04,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:37:04,965 INFO L93 Difference]: Finished difference Result 47 states and 128 transitions. [2022-12-14 13:37:04,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:37:04,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 13:37:04,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:37:04,966 INFO L225 Difference]: With dead ends: 47 [2022-12-14 13:37:04,966 INFO L226 Difference]: Without dead ends: 47 [2022-12-14 13:37:04,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:37:04,967 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 12 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:37:04,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 0 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:37:04,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-12-14 13:37:04,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-12-14 13:37:04,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 2.909090909090909) internal successors, (128), 46 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:37:04,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 128 transitions. [2022-12-14 13:37:04,971 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 128 transitions. Word has length 3 [2022-12-14 13:37:04,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:37:04,972 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 128 transitions. [2022-12-14 13:37:04,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:37:04,972 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 128 transitions. [2022-12-14 13:37:04,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 13:37:04,972 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:37:04,972 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 13:37:04,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 13:37:04,972 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-14 13:37:04,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:37:04,973 INFO L85 PathProgramCache]: Analyzing trace with hash 409563, now seen corresponding path program 1 times [2022-12-14 13:37:04,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:37:04,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398187530] [2022-12-14 13:37:04,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:37:04,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:37:04,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:37:05,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:37:05,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:37:05,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398187530] [2022-12-14 13:37:05,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398187530] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:37:05,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:37:05,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 13:37:05,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068587104] [2022-12-14 13:37:05,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:37:05,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:37:05,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:37:05,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:37:05,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:37:05,024 INFO L87 Difference]: Start difference. First operand 47 states and 128 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:37:05,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:37:05,054 INFO L93 Difference]: Finished difference Result 44 states and 122 transitions. [2022-12-14 13:37:05,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:37:05,054 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 13:37:05,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:37:05,055 INFO L225 Difference]: With dead ends: 44 [2022-12-14 13:37:05,055 INFO L226 Difference]: Without dead ends: 44 [2022-12-14 13:37:05,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:37:05,057 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:37:05,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 0 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:37:05,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-12-14 13:37:05,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-12-14 13:37:05,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 43 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:37:05,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 122 transitions. [2022-12-14 13:37:05,065 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 122 transitions. Word has length 3 [2022-12-14 13:37:05,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:37:05,066 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 122 transitions. [2022-12-14 13:37:05,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:37:05,066 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 122 transitions. [2022-12-14 13:37:05,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 13:37:05,066 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:37:05,066 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 13:37:05,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 13:37:05,067 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-14 13:37:05,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:37:05,067 INFO L85 PathProgramCache]: Analyzing trace with hash -683364377, now seen corresponding path program 1 times [2022-12-14 13:37:05,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:37:05,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99867638] [2022-12-14 13:37:05,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:37:05,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:37:05,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:37:05,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:37:05,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:37:05,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99867638] [2022-12-14 13:37:05,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99867638] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:37:05,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:37:05,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:37:05,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257142119] [2022-12-14 13:37:05,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:37:05,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:37:05,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:37:05,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:37:05,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:37:05,129 INFO L87 Difference]: Start difference. First operand 44 states and 122 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:37:05,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:37:05,159 INFO L93 Difference]: Finished difference Result 53 states and 149 transitions. [2022-12-14 13:37:05,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:37:05,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 13:37:05,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:37:05,160 INFO L225 Difference]: With dead ends: 53 [2022-12-14 13:37:05,160 INFO L226 Difference]: Without dead ends: 53 [2022-12-14 13:37:05,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:37:05,161 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 9 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:37:05,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 0 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:37:05,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-12-14 13:37:05,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-12-14 13:37:05,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 51 states have (on average 2.9215686274509802) internal successors, (149), 52 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:37:05,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 149 transitions. [2022-12-14 13:37:05,166 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 149 transitions. Word has length 6 [2022-12-14 13:37:05,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:37:05,166 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 149 transitions. [2022-12-14 13:37:05,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:37:05,167 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 149 transitions. [2022-12-14 13:37:05,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 13:37:05,167 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:37:05,167 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:37:05,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 13:37:05,168 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-14 13:37:05,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:37:05,168 INFO L85 PathProgramCache]: Analyzing trace with hash 290540986, now seen corresponding path program 1 times [2022-12-14 13:37:05,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:37:05,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037560393] [2022-12-14 13:37:05,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:37:05,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:37:05,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:37:05,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:37:05,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:37:05,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037560393] [2022-12-14 13:37:05,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037560393] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:37:05,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087199017] [2022-12-14 13:37:05,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:37:05,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:37:05,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:37:05,213 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:37:05,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 13:37:05,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:37:05,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:37:05,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:37:05,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:37:05,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:37:05,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:37:05,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087199017] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:37:05,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [31955080] [2022-12-14 13:37:05,324 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 13:37:05,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:37:05,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-14 13:37:05,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739809150] [2022-12-14 13:37:05,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:37:05,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 13:37:05,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:37:05,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 13:37:05,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:37:05,327 INFO L87 Difference]: Start difference. First operand 53 states and 149 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:37:05,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:37:05,384 INFO L93 Difference]: Finished difference Result 80 states and 230 transitions. [2022-12-14 13:37:05,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 13:37:05,385 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 13:37:05,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:37:05,386 INFO L225 Difference]: With dead ends: 80 [2022-12-14 13:37:05,386 INFO L226 Difference]: Without dead ends: 80 [2022-12-14 13:37:05,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:37:05,387 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:37:05,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 0 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:37:05,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-12-14 13:37:05,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-12-14 13:37:05,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 78 states have (on average 2.948717948717949) internal successors, (230), 79 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:37:05,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 230 transitions. [2022-12-14 13:37:05,394 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 230 transitions. Word has length 7 [2022-12-14 13:37:05,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:37:05,395 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 230 transitions. [2022-12-14 13:37:05,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:37:05,395 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 230 transitions. [2022-12-14 13:37:05,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 13:37:05,396 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:37:05,396 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-14 13:37:05,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 13:37:05,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:37:05,597 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-14 13:37:05,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:37:05,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1147604135, now seen corresponding path program 2 times [2022-12-14 13:37:05,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:37:05,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033789827] [2022-12-14 13:37:05,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:37:05,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:37:05,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:37:05,745 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:37:05,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:37:05,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033789827] [2022-12-14 13:37:05,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033789827] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:37:05,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382539417] [2022-12-14 13:37:05,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:37:05,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:37:05,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:37:05,747 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:37:05,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 13:37:05,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 13:37:05,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:37:05,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 13:37:05,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:37:05,830 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:37:05,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:37:05,871 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:37:05,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382539417] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:37:05,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1323073427] [2022-12-14 13:37:05,872 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 13:37:05,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:37:05,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-14 13:37:05,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012944963] [2022-12-14 13:37:05,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:37:05,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 13:37:05,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:37:05,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 13:37:05,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-14 13:37:05,874 INFO L87 Difference]: Start difference. First operand 80 states and 230 transitions. Second operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:37:05,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:37:05,978 INFO L93 Difference]: Finished difference Result 134 states and 392 transitions. [2022-12-14 13:37:05,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 13:37:05,979 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 13:37:05,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:37:05,980 INFO L225 Difference]: With dead ends: 134 [2022-12-14 13:37:05,980 INFO L226 Difference]: Without dead ends: 134 [2022-12-14 13:37:05,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-14 13:37:05,982 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 222 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:37:05,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 0 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:37:05,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-12-14 13:37:05,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-12-14 13:37:05,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 132 states have (on average 2.9696969696969697) internal successors, (392), 133 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:37:05,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 392 transitions. [2022-12-14 13:37:05,995 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 392 transitions. Word has length 10 [2022-12-14 13:37:05,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:37:05,995 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 392 transitions. [2022-12-14 13:37:05,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:37:05,996 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 392 transitions. [2022-12-14 13:37:05,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 13:37:05,997 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:37:05,997 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-12-14 13:37:06,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 13:37:06,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:37:06,198 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)] === [2022-12-14 13:37:06,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:37:06,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1133485113, now seen corresponding path program 3 times [2022-12-14 13:37:06,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:37:06,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523164802] [2022-12-14 13:37:06,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:37:06,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:37:06,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:37:06,338 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:37:06,338 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:37:06,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523164802] [2022-12-14 13:37:06,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523164802] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:37:06,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143717623] [2022-12-14 13:37:06,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:37:06,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:37:06,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:37:06,339 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:37:06,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 13:37:06,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:37:06,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:37:06,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 13:37:06,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:37:06,439 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:37:06,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:37:06,582 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:37:06,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143717623] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:37:06,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1345092279] [2022-12-14 13:37:06,583 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 13:37:06,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:37:06,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-12-14 13:37:06,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123510329] [2022-12-14 13:37:06,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:37:06,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 13:37:06,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:37:06,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 13:37:06,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-12-14 13:37:06,586 INFO L87 Difference]: Start difference. First operand 134 states and 392 transitions. Second operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:37:06,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:37:06,847 INFO L93 Difference]: Finished difference Result 242 states and 716 transitions. [2022-12-14 13:37:06,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 13:37:06,848 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 13:37:06,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:37:06,850 INFO L225 Difference]: With dead ends: 242 [2022-12-14 13:37:06,850 INFO L226 Difference]: Without dead ends: 242 [2022-12-14 13:37:06,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-12-14 13:37:06,851 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 345 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:37:06,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 0 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:37:06,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-12-14 13:37:06,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2022-12-14 13:37:06,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 240 states have (on average 2.9833333333333334) internal successors, (716), 241 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:37:06,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 716 transitions. [2022-12-14 13:37:06,862 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 716 transitions. Word has length 16 [2022-12-14 13:37:06,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:37:06,862 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 716 transitions. [2022-12-14 13:37:06,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:37:06,862 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 716 transitions. [2022-12-14 13:37:06,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 13:37:06,863 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:37:06,864 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2022-12-14 13:37:06,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 13:37:07,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 13:37:07,065 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)] === [2022-12-14 13:37:07,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:37:07,066 INFO L85 PathProgramCache]: Analyzing trace with hash 784566791, now seen corresponding path program 4 times [2022-12-14 13:37:07,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:37:07,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445571055] [2022-12-14 13:37:07,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:37:07,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:37:07,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:37:07,528 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:37:07,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:37:07,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445571055] [2022-12-14 13:37:07,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445571055] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:37:07,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774058171] [2022-12-14 13:37:07,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:37:07,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:37:07,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:37:07,529 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:37:07,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 13:37:07,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:37:07,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 13:37:07,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:37:07,650 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:37:07,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:37:07,874 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:37:07,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774058171] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:37:07,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1410589037] [2022-12-14 13:37:07,874 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 13:37:07,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:37:07,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 26 [2022-12-14 13:37:07,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611544830] [2022-12-14 13:37:07,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:37:07,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 13:37:07,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:37:07,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 13:37:07,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-12-14 13:37:07,877 INFO L87 Difference]: Start difference. First operand 242 states and 716 transitions. Second operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:37:08,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:37:08,044 INFO L93 Difference]: Finished difference Result 260 states and 770 transitions. [2022-12-14 13:37:08,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 13:37:08,045 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-12-14 13:37:08,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:37:08,048 INFO L225 Difference]: With dead ends: 260 [2022-12-14 13:37:08,048 INFO L226 Difference]: Without dead ends: 260 [2022-12-14 13:37:08,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 22 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-12-14 13:37:08,049 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 369 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:37:08,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 0 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:37:08,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-12-14 13:37:08,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2022-12-14 13:37:08,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 258 states have (on average 2.9844961240310077) internal successors, (770), 259 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:37:08,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 770 transitions. [2022-12-14 13:37:08,067 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 770 transitions. Word has length 28 [2022-12-14 13:37:08,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:37:08,067 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 770 transitions. [2022-12-14 13:37:08,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:37:08,067 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 770 transitions. [2022-12-14 13:37:08,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 13:37:08,070 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:37:08,071 INFO L195 NwaCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1] [2022-12-14 13:37:08,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 13:37:08,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:37:08,273 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)] === [2022-12-14 13:37:08,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:37:08,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1945551769, now seen corresponding path program 5 times [2022-12-14 13:37:08,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:37:08,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289346331] [2022-12-14 13:37:08,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:37:08,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:37:08,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:37:09,656 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:37:09,656 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:37:09,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289346331] [2022-12-14 13:37:09,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289346331] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:37:09,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272020908] [2022-12-14 13:37:09,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:37:09,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:37:09,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:37:09,658 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:37:09,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 13:37:09,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-12-14 13:37:09,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:37:09,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 83 conjunts are in the unsatisfiable core [2022-12-14 13:37:09,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:37:10,772 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 253 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:37:10,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:37:12,010 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:37:12,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272020908] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:37:12,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [311490252] [2022-12-14 13:37:12,011 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 13:37:12,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:37:12,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 75 [2022-12-14 13:37:12,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613256649] [2022-12-14 13:37:12,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:37:12,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-12-14 13:37:12,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:37:12,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-12-14 13:37:12,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1057, Invalid=4795, Unknown=0, NotChecked=0, Total=5852 [2022-12-14 13:37:12,013 INFO L87 Difference]: Start difference. First operand 260 states and 770 transitions. Second operand has 77 states, 76 states have (on average 1.1842105263157894) internal successors, (90), 76 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:38:33,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:38:33,650 INFO L93 Difference]: Finished difference Result 48051 states and 142663 transitions. [2022-12-14 13:38:33,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 596 states. [2022-12-14 13:38:33,650 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 1.1842105263157894) internal successors, (90), 76 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-12-14 13:38:33,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:38:33,853 INFO L225 Difference]: With dead ends: 48051 [2022-12-14 13:38:33,853 INFO L226 Difference]: Without dead ends: 48051 [2022-12-14 13:38:33,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 650 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 642 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202191 ImplicationChecksByTransitivity, 74.6s TimeCoverageRelationStatistics Valid=75264, Invalid=338828, Unknown=0, NotChecked=0, Total=414092 [2022-12-14 13:38:33,918 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 9119 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7396 mSolverCounterSat, 3129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9119 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 10525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3129 IncrementalHoareTripleChecker+Valid, 7396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:38:33,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9119 Valid, 0 Invalid, 10525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3129 Valid, 7396 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-12-14 13:38:33,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48051 states. [2022-12-14 13:38:34,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48051 to 38653. [2022-12-14 13:38:34,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38653 states, 38651 states have (on average 3.2407182220382396) internal successors, (125257), 38652 states have internal predecessors, (125257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:38:34,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38653 states to 38653 states and 125257 transitions. [2022-12-14 13:38:34,976 INFO L78 Accepts]: Start accepts. Automaton has 38653 states and 125257 transitions. Word has length 30 [2022-12-14 13:38:34,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:38:34,977 INFO L495 AbstractCegarLoop]: Abstraction has 38653 states and 125257 transitions. [2022-12-14 13:38:34,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 1.1842105263157894) internal successors, (90), 76 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:38:34,978 INFO L276 IsEmpty]: Start isEmpty. Operand 38653 states and 125257 transitions. [2022-12-14 13:38:35,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 13:38:35,102 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:38:35,102 INFO L195 NwaCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1] [2022-12-14 13:38:35,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 13:38:35,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:38:35,307 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-14 13:38:35,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:38:35,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1945551765, now seen corresponding path program 1 times [2022-12-14 13:38:35,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:38:35,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480403528] [2022-12-14 13:38:35,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:38:35,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:38:35,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:38:35,549 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-12-14 13:38:35,549 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:38:35,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480403528] [2022-12-14 13:38:35,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480403528] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:38:35,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:38:35,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 13:38:35,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290345479] [2022-12-14 13:38:35,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:38:35,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:38:35,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:38:35,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:38:35,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:38:35,551 INFO L87 Difference]: Start difference. First operand 38653 states and 125257 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:38:35,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:38:35,871 INFO L93 Difference]: Finished difference Result 38644 states and 122718 transitions. [2022-12-14 13:38:35,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:38:35,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-12-14 13:38:35,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:38:36,044 INFO L225 Difference]: With dead ends: 38644 [2022-12-14 13:38:36,044 INFO L226 Difference]: Without dead ends: 38618 [2022-12-14 13:38:36,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:38:36,045 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 7 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:38:36,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 0 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:38:36,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38618 states. [2022-12-14 13:38:36,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38618 to 38294. [2022-12-14 13:38:36,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38294 states, 38293 states have (on average 3.1942130415480636) internal successors, (122316), 38293 states have internal predecessors, (122316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:38:36,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38294 states to 38294 states and 122316 transitions. [2022-12-14 13:38:36,917 INFO L78 Accepts]: Start accepts. Automaton has 38294 states and 122316 transitions. Word has length 30 [2022-12-14 13:38:36,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:38:36,917 INFO L495 AbstractCegarLoop]: Abstraction has 38294 states and 122316 transitions. [2022-12-14 13:38:36,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:38:36,917 INFO L276 IsEmpty]: Start isEmpty. Operand 38294 states and 122316 transitions. [2022-12-14 13:38:36,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 13:38:36,966 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:38:36,966 INFO L195 NwaCegarLoop]: trace histogram [24, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:38:36,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 13:38:36,967 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)] === [2022-12-14 13:38:36,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:38:36,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1346136645, now seen corresponding path program 1 times [2022-12-14 13:38:36,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:38:36,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204090646] [2022-12-14 13:38:36,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:38:36,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:38:36,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:38:38,424 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:38:38,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:38:38,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204090646] [2022-12-14 13:38:38,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204090646] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:38:38,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294910101] [2022-12-14 13:38:38,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:38:38,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:38:38,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:38:38,426 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:38:38,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 13:38:38,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:38:38,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 82 conjunts are in the unsatisfiable core [2022-12-14 13:38:38,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:38:39,532 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 253 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:38:39,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:38:40,871 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:38:40,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294910101] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:38:40,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1587588429] [2022-12-14 13:38:40,871 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 13:38:40,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:38:40,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 81 [2022-12-14 13:38:40,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65235395] [2022-12-14 13:38:40,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:38:40,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-12-14 13:38:40,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:38:40,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-12-14 13:38:40,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1135, Invalid=5671, Unknown=0, NotChecked=0, Total=6806 [2022-12-14 13:38:40,874 INFO L87 Difference]: Start difference. First operand 38294 states and 122316 transitions. Second operand has 83 states, 82 states have (on average 1.2073170731707317) internal successors, (99), 82 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:41:13,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:41:13,337 INFO L93 Difference]: Finished difference Result 1599117 states and 5173015 transitions. [2022-12-14 13:41:13,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 753 states. [2022-12-14 13:41:13,337 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 1.2073170731707317) internal successors, (99), 82 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-12-14 13:41:13,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:41:20,358 INFO L225 Difference]: With dead ends: 1599117 [2022-12-14 13:41:20,358 INFO L226 Difference]: Without dead ends: 1569958 [2022-12-14 13:41:20,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 814 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 804 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320761 ImplicationChecksByTransitivity, 130.2s TimeCoverageRelationStatistics Valid=172746, Invalid=476084, Unknown=0, NotChecked=0, Total=648830 [2022-12-14 13:41:20,392 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 12672 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8998 mSolverCounterSat, 2652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12672 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 11650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2652 IncrementalHoareTripleChecker+Valid, 8998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:41:20,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12672 Valid, 0 Invalid, 11650 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2652 Valid, 8998 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2022-12-14 13:41:21,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569958 states. [2022-12-14 13:41:56,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569958 to 735843. [2022-12-14 13:41:57,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735843 states, 735842 states have (on average 3.949218718148733) internal successors, (2906001), 735842 states have internal predecessors, (2906001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:42:01,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735843 states to 735843 states and 2906001 transitions. [2022-12-14 13:42:01,029 INFO L78 Accepts]: Start accepts. Automaton has 735843 states and 2906001 transitions. Word has length 33 [2022-12-14 13:42:01,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:42:01,029 INFO L495 AbstractCegarLoop]: Abstraction has 735843 states and 2906001 transitions. [2022-12-14 13:42:01,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 1.2073170731707317) internal successors, (99), 82 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:42:01,030 INFO L276 IsEmpty]: Start isEmpty. Operand 735843 states and 2906001 transitions. [2022-12-14 13:42:02,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 13:42:02,253 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:42:02,253 INFO L195 NwaCegarLoop]: trace histogram [24, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:42:02,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 13:42:02,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:42:02,454 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-14 13:42:02,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:42:02,456 INFO L85 PathProgramCache]: Analyzing trace with hash 649447505, now seen corresponding path program 1 times [2022-12-14 13:42:02,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:42:02,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104240183] [2022-12-14 13:42:02,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:42:02,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:42:02,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:42:03,740 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:42:03,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:42:03,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104240183] [2022-12-14 13:42:03,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104240183] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:42:03,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623950196] [2022-12-14 13:42:03,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:42:03,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:42:03,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:42:03,742 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:42:03,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 13:42:03,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:42:03,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 82 conjunts are in the unsatisfiable core [2022-12-14 13:42:03,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:42:04,929 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 253 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:42:04,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:42:06,435 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:42:06,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623950196] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:42:06,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [986685783] [2022-12-14 13:42:06,436 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 13:42:06,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:42:06,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 81 [2022-12-14 13:42:06,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040211387] [2022-12-14 13:42:06,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:42:06,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-12-14 13:42:06,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:42:06,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-12-14 13:42:06,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1118, Invalid=5688, Unknown=0, NotChecked=0, Total=6806 [2022-12-14 13:42:06,439 INFO L87 Difference]: Start difference. First operand 735843 states and 2906001 transitions. Second operand has 83 states, 82 states have (on average 1.2073170731707317) internal successors, (99), 82 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:43:21,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:43:21,274 INFO L93 Difference]: Finished difference Result 773362 states and 3033910 transitions. [2022-12-14 13:43:21,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 475 states. [2022-12-14 13:43:21,275 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 1.2073170731707317) internal successors, (99), 82 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-12-14 13:43:21,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:43:24,957 INFO L225 Difference]: With dead ends: 773362 [2022-12-14 13:43:24,957 INFO L226 Difference]: Without dead ends: 773362 [2022-12-14 13:43:24,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 525 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130613 ImplicationChecksByTransitivity, 66.4s TimeCoverageRelationStatistics Valid=57745, Invalid=219457, Unknown=0, NotChecked=0, Total=277202 [2022-12-14 13:43:24,970 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 7957 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7090 mSolverCounterSat, 1679 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7957 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 8769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1679 IncrementalHoareTripleChecker+Valid, 7090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:43:24,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7957 Valid, 0 Invalid, 8769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1679 Valid, 7090 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-12-14 13:43:25,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773362 states. [2022-12-14 13:43:45,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773362 to 753381. [2022-12-14 13:43:46,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753381 states, 753380 states have (on average 3.9574570601821124) internal successors, (2981469), 753380 states have internal predecessors, (2981469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:43:50,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753381 states to 753381 states and 2981469 transitions. [2022-12-14 13:43:50,732 INFO L78 Accepts]: Start accepts. Automaton has 753381 states and 2981469 transitions. Word has length 33 [2022-12-14 13:43:50,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:43:50,733 INFO L495 AbstractCegarLoop]: Abstraction has 753381 states and 2981469 transitions. [2022-12-14 13:43:50,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 1.2073170731707317) internal successors, (99), 82 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:43:50,733 INFO L276 IsEmpty]: Start isEmpty. Operand 753381 states and 2981469 transitions. [2022-12-14 13:43:51,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 13:43:51,980 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:43:51,980 INFO L195 NwaCegarLoop]: trace histogram [24, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:43:51,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 13:43:52,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 13:43:52,183 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-14 13:43:52,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:43:52,184 INFO L85 PathProgramCache]: Analyzing trace with hash 599859905, now seen corresponding path program 2 times [2022-12-14 13:43:52,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:43:52,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579267820] [2022-12-14 13:43:52,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:43:52,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:43:52,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:43:53,187 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:43:53,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:43:53,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579267820] [2022-12-14 13:43:53,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579267820] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:43:53,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709964294] [2022-12-14 13:43:53,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:43:53,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:43:53,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:43:53,188 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:43:53,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 13:43:53,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-12-14 13:43:53,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:43:53,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 82 conjunts are in the unsatisfiable core [2022-12-14 13:43:53,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:43:54,185 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 253 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:43:54,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:43:55,415 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:43:55,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709964294] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:43:55,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [877003114] [2022-12-14 13:43:55,416 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 13:43:55,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:43:55,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 81 [2022-12-14 13:43:55,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090852297] [2022-12-14 13:43:55,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:43:55,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-12-14 13:43:55,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:43:55,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-12-14 13:43:55,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1113, Invalid=5693, Unknown=0, NotChecked=0, Total=6806 [2022-12-14 13:43:55,419 INFO L87 Difference]: Start difference. First operand 753381 states and 2981469 transitions. Second operand has 83 states, 82 states have (on average 1.2073170731707317) internal successors, (99), 82 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:45:13,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:45:13,108 INFO L93 Difference]: Finished difference Result 1265448 states and 4861990 transitions. [2022-12-14 13:45:13,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 475 states. [2022-12-14 13:45:13,109 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 1.2073170731707317) internal successors, (99), 82 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-12-14 13:45:13,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:45:19,774 INFO L225 Difference]: With dead ends: 1265448 [2022-12-14 13:45:19,775 INFO L226 Difference]: Without dead ends: 1265326 [2022-12-14 13:45:19,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 525 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133358 ImplicationChecksByTransitivity, 64.7s TimeCoverageRelationStatistics Valid=59675, Invalid=217527, Unknown=0, NotChecked=0, Total=277202 [2022-12-14 13:45:19,789 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 6922 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7132 mSolverCounterSat, 1604 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6922 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 8736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1604 IncrementalHoareTripleChecker+Valid, 7132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-12-14 13:45:19,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6922 Valid, 0 Invalid, 8736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1604 Valid, 7132 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-12-14 13:45:21,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265326 states. [2022-12-14 13:46:10,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265326 to 1027924. [2022-12-14 13:46:11,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027924 states, 1027923 states have (on average 4.1119159703596475) internal successors, (4226733), 1027923 states have internal predecessors, (4226733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:46:17,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027924 states to 1027924 states and 4226733 transitions. [2022-12-14 13:46:17,238 INFO L78 Accepts]: Start accepts. Automaton has 1027924 states and 4226733 transitions. Word has length 33 [2022-12-14 13:46:17,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:46:17,238 INFO L495 AbstractCegarLoop]: Abstraction has 1027924 states and 4226733 transitions. [2022-12-14 13:46:17,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 1.2073170731707317) internal successors, (99), 82 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:46:17,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1027924 states and 4226733 transitions. [2022-12-14 13:46:18,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 13:46:18,573 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:46:18,573 INFO L195 NwaCegarLoop]: trace histogram [24, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:46:18,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 13:46:18,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 13:46:18,775 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-14 13:46:18,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:46:18,780 INFO L85 PathProgramCache]: Analyzing trace with hash -937369645, now seen corresponding path program 3 times [2022-12-14 13:46:18,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:46:18,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033162460] [2022-12-14 13:46:18,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:46:18,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:46:18,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:46:19,788 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:46:19,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:46:19,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033162460] [2022-12-14 13:46:19,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033162460] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:46:19,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960502045] [2022-12-14 13:46:19,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:46:19,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:46:19,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:46:19,790 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:46:19,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35d7f914-1698-4231-ac89-aec29c35c2d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 13:46:19,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:46:19,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:46:19,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 82 conjunts are in the unsatisfiable core [2022-12-14 13:46:19,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:46:20,817 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 231 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:46:20,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:46:22,238 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:46:22,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960502045] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:46:22,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1770579234] [2022-12-14 13:46:22,238 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 13:46:22,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:46:22,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 81 [2022-12-14 13:46:22,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346531851] [2022-12-14 13:46:22,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:46:22,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-12-14 13:46:22,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:46:22,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-12-14 13:46:22,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1143, Invalid=5663, Unknown=0, NotChecked=0, Total=6806 [2022-12-14 13:46:22,241 INFO L87 Difference]: Start difference. First operand 1027924 states and 4226733 transitions. Second operand has 83 states, 82 states have (on average 1.2073170731707317) internal successors, (99), 82 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)