./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/fib_safe-6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/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_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/fib_safe-6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/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_4ba0f339-8891-4f63-b654-5646d92179d3/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 ca933e9c322081d61da01652cda9ceed61707699c680fd4ef3d92d3ccd39b362 --- 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 07:17:39,108 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:17:39,110 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:17:39,123 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:17:39,123 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:17:39,124 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:17:39,125 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:17:39,126 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:17:39,127 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:17:39,128 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:17:39,128 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:17:39,129 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:17:39,129 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:17:39,130 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:17:39,131 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:17:39,132 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:17:39,132 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:17:39,133 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:17:39,134 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:17:39,135 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:17:39,136 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:17:39,137 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:17:39,138 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:17:39,139 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:17:39,141 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:17:39,141 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:17:39,142 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:17:39,142 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:17:39,143 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:17:39,143 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:17:39,144 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:17:39,144 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:17:39,145 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:17:39,145 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:17:39,146 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:17:39,146 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:17:39,147 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:17:39,147 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:17:39,147 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:17:39,148 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:17:39,148 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:17:39,149 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 07:17:39,165 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:17:39,165 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:17:39,165 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:17:39,165 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:17:39,166 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:17:39,166 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:17:39,166 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:17:39,166 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:17:39,166 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:17:39,166 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 07:17:39,166 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:17:39,166 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:17:39,167 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 07:17:39,167 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 07:17:39,167 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:17:39,167 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 07:17:39,167 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 07:17:39,167 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 07:17:39,168 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 07:17:39,168 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 07:17:39,168 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:17:39,168 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:17:39,168 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 07:17:39,168 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:17:39,168 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:17:39,168 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:17:39,169 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 07:17:39,169 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 07:17:39,169 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 07:17:39,169 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:17:39,169 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 07:17:39,169 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:17:39,169 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:17:39,169 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:17:39,170 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:17:39,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:17:39,170 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:17:39,170 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 07:17:39,170 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:17:39,170 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 07:17:39,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 07:17:39,170 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:17:39,170 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_4ba0f339-8891-4f63-b654-5646d92179d3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca933e9c322081d61da01652cda9ceed61707699c680fd4ef3d92d3ccd39b362 [2022-12-14 07:17:39,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:17:39,352 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:17:39,354 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:17:39,355 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:17:39,356 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:17:39,357 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/pthread/fib_safe-6.i [2022-12-14 07:17:41,994 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:17:42,148 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:17:42,149 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/sv-benchmarks/c/pthread/fib_safe-6.i [2022-12-14 07:17:42,158 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/data/868d3ba1e/168d81a1f2e04300bc3684dbe80afff2/FLAG0e37b5ffe [2022-12-14 07:17:42,168 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/data/868d3ba1e/168d81a1f2e04300bc3684dbe80afff2 [2022-12-14 07:17:42,170 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:17:42,171 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:17:42,172 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:17:42,172 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:17:42,176 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:17:42,177 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:17:42" (1/1) ... [2022-12-14 07:17:42,178 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4df73d84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:17:42, skipping insertion in model container [2022-12-14 07:17:42,178 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:17:42" (1/1) ... [2022-12-14 07:17:42,185 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:17:42,219 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:17:42,435 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_4ba0f339-8891-4f63-b654-5646d92179d3/sv-benchmarks/c/pthread/fib_safe-6.i[30241,30254] [2022-12-14 07:17:42,442 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:17:42,443 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:17:42,445 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:17:42,446 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:17:42,449 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:17:42,449 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:17:42,449 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:17:42,450 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:17:42,453 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:17:42,454 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:17:42,454 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:17:42,463 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 07:17:42,487 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_4ba0f339-8891-4f63-b654-5646d92179d3/sv-benchmarks/c/pthread/fib_safe-6.i[30241,30254] [2022-12-14 07:17:42,488 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:17:42,489 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:17:42,489 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:17:42,490 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:17:42,492 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:17:42,492 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:17:42,492 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:17:42,492 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:17:42,494 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:17:42,494 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:17:42,495 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:17:42,516 INFO L208 MainTranslator]: Completed translation [2022-12-14 07:17:42,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:17:42 WrapperNode [2022-12-14 07:17:42,517 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:17:42,518 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 07:17:42,518 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 07:17:42,518 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 07:17:42,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:17:42" (1/1) ... [2022-12-14 07:17:42,532 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:17:42" (1/1) ... [2022-12-14 07:17:42,548 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2022-12-14 07:17:42,548 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 07:17:42,548 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 07:17:42,549 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 07:17:42,549 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 07:17:42,555 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:17:42" (1/1) ... [2022-12-14 07:17:42,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:17:42" (1/1) ... [2022-12-14 07:17:42,557 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:17:42" (1/1) ... [2022-12-14 07:17:42,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:17:42" (1/1) ... [2022-12-14 07:17:42,560 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:17:42" (1/1) ... [2022-12-14 07:17:42,563 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:17:42" (1/1) ... [2022-12-14 07:17:42,564 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:17:42" (1/1) ... [2022-12-14 07:17:42,565 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:17:42" (1/1) ... [2022-12-14 07:17:42,566 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 07:17:42,567 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 07:17:42,567 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 07:17:42,567 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 07:17:42,568 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:17:42" (1/1) ... [2022-12-14 07:17:42,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:17:42,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:17:42,590 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 07:17:42,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 07:17:42,625 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-14 07:17:42,625 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-14 07:17:42,625 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-14 07:17:42,625 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-14 07:17:42,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 07:17:42,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-14 07:17:42,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 07:17:42,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 07:17:42,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 07:17:42,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 07:17:42,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-14 07:17:42,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 07:17:42,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 07:17:42,628 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 07:17:42,730 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 07:17:42,732 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 07:17:42,903 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:17:42,910 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:17:42,911 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 07:17:42,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:17:42 BoogieIcfgContainer [2022-12-14 07:17:42,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:17:42,916 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:17:42,917 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:17:42,920 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:17:42,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:17:42" (1/3) ... [2022-12-14 07:17:42,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3221d6dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:17:42, skipping insertion in model container [2022-12-14 07:17:42,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:17:42" (2/3) ... [2022-12-14 07:17:42,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3221d6dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:17:42, skipping insertion in model container [2022-12-14 07:17:42,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:17:42" (3/3) ... [2022-12-14 07:17:42,923 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-6.i [2022-12-14 07:17:42,941 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:17:42,941 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-12-14 07:17:42,942 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 07:17:42,993 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-14 07:17:43,021 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 07:17:43,034 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 109 transitions, 228 flow [2022-12-14 07:17:43,037 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 109 transitions, 228 flow [2022-12-14 07:17:43,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 109 transitions, 228 flow [2022-12-14 07:17:43,099 INFO L130 PetriNetUnfolder]: 7/107 cut-off events. [2022-12-14 07:17:43,099 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-14 07:17:43,105 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 07:17:43,107 INFO L119 LiptonReduction]: Number of co-enabled transitions 2310 [2022-12-14 07:17:46,202 INFO L134 LiptonReduction]: Checked pairs total: 1750 [2022-12-14 07:17:46,202 INFO L136 LiptonReduction]: Total number of compositions: 111 [2022-12-14 07:17:46,210 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 21 transitions, 52 flow [2022-12-14 07:17:46,224 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 07:17:46,240 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:17:46,244 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;@74495ad9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:17:46,244 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-12-14 07:17:46,246 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 07:17:46,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-12-14 07:17:46,249 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:17:46,249 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-12-14 07:17:46,249 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 07:17:46,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:17:46,253 INFO L85 PathProgramCache]: Analyzing trace with hash 415, now seen corresponding path program 1 times [2022-12-14 07:17:46,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:17:46,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110559609] [2022-12-14 07:17:46,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:17:46,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:17:46,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:17:46,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:17:46,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:17:46,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110559609] [2022-12-14 07:17:46,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110559609] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:17:46,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:17:46,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-14 07:17:46,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745412900] [2022-12-14 07:17:46,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:17:46,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 07:17:46,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:17:46,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 07:17:46,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 07:17:46,380 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 07:17:46,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:17:46,412 INFO L93 Difference]: Finished difference Result 50 states and 134 transitions. [2022-12-14 07:17:46,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 07:17:46,414 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 07:17:46,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:17:46,422 INFO L225 Difference]: With dead ends: 50 [2022-12-14 07:17:46,422 INFO L226 Difference]: Without dead ends: 50 [2022-12-14 07:17:46,423 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 07:17:46,426 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 07:17:46,427 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 07:17:46,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-14 07:17:46,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-12-14 07:17:46,458 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 07:17:46,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 134 transitions. [2022-12-14 07:17:46,461 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 134 transitions. Word has length 1 [2022-12-14 07:17:46,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:17:46,461 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 134 transitions. [2022-12-14 07:17:46,461 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 07:17:46,461 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 134 transitions. [2022-12-14 07:17:46,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 07:17:46,462 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:17:46,462 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 07:17:46,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 07:17:46,462 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 07:17:46,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:17:46,463 INFO L85 PathProgramCache]: Analyzing trace with hash 409561, now seen corresponding path program 1 times [2022-12-14 07:17:46,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:17:46,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152985888] [2022-12-14 07:17:46,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:17:46,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:17:46,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:17:46,609 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 07:17:46,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:17:46,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152985888] [2022-12-14 07:17:46,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152985888] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:17:46,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:17:46,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:17:46,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548965427] [2022-12-14 07:17:46,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:17:46,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:17:46,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:17:46,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:17:46,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:17:46,612 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 07:17:46,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:17:46,645 INFO L93 Difference]: Finished difference Result 47 states and 128 transitions. [2022-12-14 07:17:46,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:17:46,645 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 07:17:46,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:17:46,647 INFO L225 Difference]: With dead ends: 47 [2022-12-14 07:17:46,647 INFO L226 Difference]: Without dead ends: 47 [2022-12-14 07:17:46,647 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 07:17:46,648 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 07:17:46,648 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 07:17:46,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-12-14 07:17:46,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-12-14 07:17:46,652 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 07:17:46,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 128 transitions. [2022-12-14 07:17:46,653 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 128 transitions. Word has length 3 [2022-12-14 07:17:46,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:17:46,653 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 128 transitions. [2022-12-14 07:17:46,653 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 07:17:46,653 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 128 transitions. [2022-12-14 07:17:46,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 07:17:46,653 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:17:46,653 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 07:17:46,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 07:17:46,654 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 07:17:46,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:17:46,654 INFO L85 PathProgramCache]: Analyzing trace with hash 409563, now seen corresponding path program 1 times [2022-12-14 07:17:46,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:17:46,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703628493] [2022-12-14 07:17:46,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:17:46,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:17:46,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:17:46,699 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 07:17:46,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:17:46,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703628493] [2022-12-14 07:17:46,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703628493] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:17:46,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:17:46,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:17:46,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656533530] [2022-12-14 07:17:46,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:17:46,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:17:46,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:17:46,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:17:46,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:17:46,701 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 07:17:46,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:17:46,727 INFO L93 Difference]: Finished difference Result 44 states and 122 transitions. [2022-12-14 07:17:46,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:17:46,728 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 07:17:46,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:17:46,729 INFO L225 Difference]: With dead ends: 44 [2022-12-14 07:17:46,729 INFO L226 Difference]: Without dead ends: 44 [2022-12-14 07:17:46,729 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 07:17:46,731 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 07:17:46,731 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 07:17:46,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-12-14 07:17:46,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-12-14 07:17:46,735 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 07:17:46,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 122 transitions. [2022-12-14 07:17:46,735 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 122 transitions. Word has length 3 [2022-12-14 07:17:46,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:17:46,736 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 122 transitions. [2022-12-14 07:17:46,736 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 07:17:46,736 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 122 transitions. [2022-12-14 07:17:46,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 07:17:46,736 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:17:46,736 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 07:17:46,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 07:17:46,736 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 07:17:46,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:17:46,737 INFO L85 PathProgramCache]: Analyzing trace with hash -683364377, now seen corresponding path program 1 times [2022-12-14 07:17:46,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:17:46,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420319572] [2022-12-14 07:17:46,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:17:46,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:17:46,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:17:46,779 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 07:17:46,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:17:46,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420319572] [2022-12-14 07:17:46,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420319572] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:17:46,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:17:46,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:17:46,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131306054] [2022-12-14 07:17:46,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:17:46,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:17:46,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:17:46,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:17:46,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:17:46,782 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 07:17:46,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:17:46,811 INFO L93 Difference]: Finished difference Result 53 states and 149 transitions. [2022-12-14 07:17:46,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:17:46,812 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 07:17:46,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:17:46,813 INFO L225 Difference]: With dead ends: 53 [2022-12-14 07:17:46,813 INFO L226 Difference]: Without dead ends: 53 [2022-12-14 07:17:46,814 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 07:17:46,815 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 07:17:46,815 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 07:17:46,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-12-14 07:17:46,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-12-14 07:17:46,819 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 07:17:46,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 149 transitions. [2022-12-14 07:17:46,820 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 149 transitions. Word has length 6 [2022-12-14 07:17:46,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:17:46,820 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 149 transitions. [2022-12-14 07:17:46,820 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 07:17:46,820 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 149 transitions. [2022-12-14 07:17:46,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 07:17:46,821 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:17:46,821 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:17:46,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 07:17:46,821 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 07:17:46,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:17:46,821 INFO L85 PathProgramCache]: Analyzing trace with hash 290540986, now seen corresponding path program 1 times [2022-12-14 07:17:46,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:17:46,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186779996] [2022-12-14 07:17:46,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:17:46,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:17:46,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:17:46,866 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 07:17:46,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:17:46,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186779996] [2022-12-14 07:17:46,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186779996] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:17:46,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372716676] [2022-12-14 07:17:46,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:17:46,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:17:46,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:17:46,868 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:17:46,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 07:17:46,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:17:46,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 07:17:46,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:17:46,959 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 07:17:46,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:17:46,971 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 07:17:46,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372716676] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:17:46,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1321555644] [2022-12-14 07:17:46,976 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 07:17:46,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:17:46,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-14 07:17:46,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849965360] [2022-12-14 07:17:46,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:17:46,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:17:46,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:17:46,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:17:46,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:17:46,979 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 07:17:47,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:17:47,032 INFO L93 Difference]: Finished difference Result 80 states and 230 transitions. [2022-12-14 07:17:47,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 07:17:47,032 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 07:17:47,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:17:47,033 INFO L225 Difference]: With dead ends: 80 [2022-12-14 07:17:47,033 INFO L226 Difference]: Without dead ends: 80 [2022-12-14 07:17:47,033 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 07:17:47,034 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 07:17:47,034 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 07:17:47,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-12-14 07:17:47,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-12-14 07:17:47,040 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 07:17:47,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 230 transitions. [2022-12-14 07:17:47,041 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 230 transitions. Word has length 7 [2022-12-14 07:17:47,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:17:47,041 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 230 transitions. [2022-12-14 07:17:47,042 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 07:17:47,042 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 230 transitions. [2022-12-14 07:17:47,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 07:17:47,042 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:17:47,042 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-14 07:17:47,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 07:17:47,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:17:47,244 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 07:17:47,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:17:47,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1147604135, now seen corresponding path program 2 times [2022-12-14 07:17:47,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:17:47,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563988702] [2022-12-14 07:17:47,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:17:47,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:17:47,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:17:47,412 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 07:17:47,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:17:47,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563988702] [2022-12-14 07:17:47,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563988702] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:17:47,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612593376] [2022-12-14 07:17:47,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:17:47,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:17:47,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:17:47,415 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:17:47,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 07:17:47,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 07:17:47,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:17:47,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 07:17:47,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:17:47,494 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 07:17:47,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:17:47,537 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 07:17:47,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612593376] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:17:47,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [119966488] [2022-12-14 07:17:47,537 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 07:17:47,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:17:47,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-14 07:17:47,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425804911] [2022-12-14 07:17:47,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:17:47,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 07:17:47,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:17:47,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 07:17:47,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-14 07:17:47,539 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 07:17:47,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:17:47,656 INFO L93 Difference]: Finished difference Result 134 states and 392 transitions. [2022-12-14 07:17:47,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 07:17:47,657 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 07:17:47,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:17:47,658 INFO L225 Difference]: With dead ends: 134 [2022-12-14 07:17:47,658 INFO L226 Difference]: Without dead ends: 134 [2022-12-14 07:17:47,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-14 07:17:47,659 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 07:17:47,660 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 07:17:47,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-12-14 07:17:47,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-12-14 07:17:47,671 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 07:17:47,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 392 transitions. [2022-12-14 07:17:47,673 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 392 transitions. Word has length 10 [2022-12-14 07:17:47,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:17:47,673 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 392 transitions. [2022-12-14 07:17:47,673 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 07:17:47,673 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 392 transitions. [2022-12-14 07:17:47,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 07:17:47,674 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:17:47,675 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-12-14 07:17:47,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 07:17:47,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:17:47,875 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 07:17:47,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:17:47,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1133485113, now seen corresponding path program 3 times [2022-12-14 07:17:47,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:17:47,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607479271] [2022-12-14 07:17:47,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:17:47,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:17:47,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:17:48,013 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 07:17:48,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:17:48,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607479271] [2022-12-14 07:17:48,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607479271] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:17:48,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610752859] [2022-12-14 07:17:48,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:17:48,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:17:48,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:17:48,015 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:17:48,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 07:17:48,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:17:48,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:17:48,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 07:17:48,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:17:48,105 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 07:17:48,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:17:48,196 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 07:17:48,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610752859] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:17:48,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1266716639] [2022-12-14 07:17:48,198 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 07:17:48,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:17:48,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 16 [2022-12-14 07:17:48,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885795811] [2022-12-14 07:17:48,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:17:48,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 07:17:48,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:17:48,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 07:17:48,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-12-14 07:17:48,200 INFO L87 Difference]: Start difference. First operand 134 states and 392 transitions. Second operand has 17 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states 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 07:17:48,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:17:48,332 INFO L93 Difference]: Finished difference Result 170 states and 500 transitions. [2022-12-14 07:17:48,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 07:17:48,332 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 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 07:17:48,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:17:48,334 INFO L225 Difference]: With dead ends: 170 [2022-12-14 07:17:48,334 INFO L226 Difference]: Without dead ends: 170 [2022-12-14 07:17:48,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-12-14 07:17:48,335 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 174 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:17:48,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 0 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:17:48,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-12-14 07:17:48,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2022-12-14 07:17:48,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 168 states have (on average 2.9761904761904763) internal successors, (500), 169 states have internal predecessors, (500), 0 states have call successors, (0), 0 states 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 07:17:48,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 500 transitions. [2022-12-14 07:17:48,352 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 500 transitions. Word has length 16 [2022-12-14 07:17:48,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:17:48,352 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 500 transitions. [2022-12-14 07:17:48,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states 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 07:17:48,352 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 500 transitions. [2022-12-14 07:17:48,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 07:17:48,354 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:17:48,354 INFO L195 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1] [2022-12-14 07:17:48,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 07:17:48,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:17:48,555 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 07:17:48,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:17:48,557 INFO L85 PathProgramCache]: Analyzing trace with hash -2099916665, now seen corresponding path program 4 times [2022-12-14 07:17:48,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:17:48,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075288065] [2022-12-14 07:17:48,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:17:48,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:17:48,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:17:49,287 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:17:49,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:17:49,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075288065] [2022-12-14 07:17:49,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075288065] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:17:49,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750178764] [2022-12-14 07:17:49,287 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 07:17:49,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:17:49,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:17:49,288 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:17:49,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 07:17:49,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:17:49,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-14 07:17:49,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:17:49,826 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 78 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:17:49,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:17:50,490 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:17:50,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750178764] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:17:50,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1425930975] [2022-12-14 07:17:50,491 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 07:17:50,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:17:50,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2022-12-14 07:17:50,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290542657] [2022-12-14 07:17:50,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:17:50,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-14 07:17:50,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:17:50,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-14 07:17:50,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=1750, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 07:17:50,494 INFO L87 Difference]: Start difference. First operand 170 states and 500 transitions. Second operand has 47 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 46 states have internal predecessors, (60), 0 states have call successors, (0), 0 states 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 07:18:02,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:18:02,542 INFO L93 Difference]: Finished difference Result 11101 states and 32953 transitions. [2022-12-14 07:18:02,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2022-12-14 07:18:02,543 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 46 states have internal predecessors, (60), 0 states have call successors, (0), 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 20 [2022-12-14 07:18:02,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:18:02,582 INFO L225 Difference]: With dead ends: 11101 [2022-12-14 07:18:02,582 INFO L226 Difference]: Without dead ends: 11101 [2022-12-14 07:18:02,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25232 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=11989, Invalid=44893, Unknown=0, NotChecked=0, Total=56882 [2022-12-14 07:18:02,590 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2158 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3065 mSolverCounterSat, 594 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2158 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 594 IncrementalHoareTripleChecker+Valid, 3065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-14 07:18:02,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2158 Valid, 0 Invalid, 3659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [594 Valid, 3065 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-14 07:18:02,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11101 states. [2022-12-14 07:18:02,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11101 to 8418. [2022-12-14 07:18:02,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8418 states, 8416 states have (on average 3.301093155893536) internal successors, (27782), 8417 states have internal predecessors, (27782), 0 states have call successors, (0), 0 states 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 07:18:02,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8418 states to 8418 states and 27782 transitions. [2022-12-14 07:18:02,924 INFO L78 Accepts]: Start accepts. Automaton has 8418 states and 27782 transitions. Word has length 20 [2022-12-14 07:18:02,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:18:02,924 INFO L495 AbstractCegarLoop]: Abstraction has 8418 states and 27782 transitions. [2022-12-14 07:18:02,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 46 states have internal predecessors, (60), 0 states have call successors, (0), 0 states 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 07:18:02,925 INFO L276 IsEmpty]: Start isEmpty. Operand 8418 states and 27782 transitions. [2022-12-14 07:18:02,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 07:18:02,936 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:18:02,937 INFO L195 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1] [2022-12-14 07:18:02,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 07:18:03,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:18:03,138 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-14 07:18:03,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:18:03,139 INFO L85 PathProgramCache]: Analyzing trace with hash -2099916661, now seen corresponding path program 1 times [2022-12-14 07:18:03,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:18:03,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233858130] [2022-12-14 07:18:03,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:18:03,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:18:03,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:18:03,298 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-12-14 07:18:03,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:18:03,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233858130] [2022-12-14 07:18:03,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233858130] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:18:03,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:18:03,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:18:03,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417751388] [2022-12-14 07:18:03,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:18:03,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:18:03,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:18:03,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:18:03,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:18:03,300 INFO L87 Difference]: Start difference. First operand 8418 states and 27782 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 07:18:03,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:18:03,361 INFO L93 Difference]: Finished difference Result 8409 states and 26843 transitions. [2022-12-14 07:18:03,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:18:03,362 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 20 [2022-12-14 07:18:03,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:18:03,408 INFO L225 Difference]: With dead ends: 8409 [2022-12-14 07:18:03,409 INFO L226 Difference]: Without dead ends: 8393 [2022-12-14 07:18:03,409 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 07:18:03,410 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 07:18:03,410 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 07:18:03,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8393 states. [2022-12-14 07:18:03,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8393 to 8274. [2022-12-14 07:18:03,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8274 states, 8273 states have (on average 3.2244651275232683) internal successors, (26676), 8273 states have internal predecessors, (26676), 0 states have call successors, (0), 0 states 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 07:18:03,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8274 states to 8274 states and 26676 transitions. [2022-12-14 07:18:03,674 INFO L78 Accepts]: Start accepts. Automaton has 8274 states and 26676 transitions. Word has length 20 [2022-12-14 07:18:03,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:18:03,675 INFO L495 AbstractCegarLoop]: Abstraction has 8274 states and 26676 transitions. [2022-12-14 07:18:03,675 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 07:18:03,675 INFO L276 IsEmpty]: Start isEmpty. Operand 8274 states and 26676 transitions. [2022-12-14 07:18:03,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 07:18:03,689 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:18:03,689 INFO L195 NwaCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:18:03,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 07:18:03,689 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-14 07:18:03,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:18:03,690 INFO L85 PathProgramCache]: Analyzing trace with hash -664091365, now seen corresponding path program 1 times [2022-12-14 07:18:03,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:18:03,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178101035] [2022-12-14 07:18:03,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:18:03,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:18:03,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:18:04,425 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:18:04,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:18:04,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178101035] [2022-12-14 07:18:04,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178101035] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:18:04,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355322917] [2022-12-14 07:18:04,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:18:04,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:18:04,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:18:04,427 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:18:04,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 07:18:04,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:18:04,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-14 07:18:04,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:18:05,035 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 78 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:18:05,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:18:05,821 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:18:05,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355322917] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:18:05,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1037134538] [2022-12-14 07:18:05,822 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 07:18:05,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:18:05,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2022-12-14 07:18:05,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984928422] [2022-12-14 07:18:05,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:18:05,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-14 07:18:05,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:18:05,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-14 07:18:05,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=460, Invalid=2296, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 07:18:05,825 INFO L87 Difference]: Start difference. First operand 8274 states and 26676 transitions. Second operand has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 07:18:29,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:18:29,831 INFO L93 Difference]: Finished difference Result 146520 states and 473618 transitions. [2022-12-14 07:18:29,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 293 states. [2022-12-14 07:18:29,832 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 0 states have call successors, (0), 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 23 [2022-12-14 07:18:29,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:18:30,446 INFO L225 Difference]: With dead ends: 146520 [2022-12-14 07:18:30,447 INFO L226 Difference]: Without dead ends: 143075 [2022-12-14 07:18:30,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 324 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46529 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=28356, Invalid=77594, Unknown=0, NotChecked=0, Total=105950 [2022-12-14 07:18:30,455 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2655 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3905 mSolverCounterSat, 660 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2655 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 660 IncrementalHoareTripleChecker+Valid, 3905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-12-14 07:18:30,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2655 Valid, 0 Invalid, 4565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [660 Valid, 3905 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-12-14 07:18:30,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143075 states. [2022-12-14 07:18:33,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143075 to 67340. [2022-12-14 07:18:33,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67340 states, 67339 states have (on average 3.898558042144968) internal successors, (262525), 67339 states have internal predecessors, (262525), 0 states have call successors, (0), 0 states 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 07:18:33,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67340 states to 67340 states and 262525 transitions. [2022-12-14 07:18:33,547 INFO L78 Accepts]: Start accepts. Automaton has 67340 states and 262525 transitions. Word has length 23 [2022-12-14 07:18:33,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:18:33,548 INFO L495 AbstractCegarLoop]: Abstraction has 67340 states and 262525 transitions. [2022-12-14 07:18:33,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 07:18:33,548 INFO L276 IsEmpty]: Start isEmpty. Operand 67340 states and 262525 transitions. [2022-12-14 07:18:33,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 07:18:33,639 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:18:33,639 INFO L195 NwaCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:18:33,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 07:18:33,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:18:33,840 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 07:18:33,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:18:33,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1874804785, now seen corresponding path program 1 times [2022-12-14 07:18:33,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:18:33,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608853224] [2022-12-14 07:18:33,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:18:33,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:18:33,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:18:34,568 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:18:34,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:18:34,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608853224] [2022-12-14 07:18:34,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608853224] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:18:34,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284120709] [2022-12-14 07:18:34,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:18:34,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:18:34,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:18:34,570 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:18:34,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 07:18:34,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:18:34,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-14 07:18:34,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:18:35,166 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 78 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:18:35,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:18:35,863 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:18:35,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284120709] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:18:35,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1295904822] [2022-12-14 07:18:35,864 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 07:18:35,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:18:35,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2022-12-14 07:18:35,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438272090] [2022-12-14 07:18:35,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:18:35,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-14 07:18:35,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:18:35,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-14 07:18:35,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=2303, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 07:18:35,865 INFO L87 Difference]: Start difference. First operand 67340 states and 262525 transitions. Second operand has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 07:18:51,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:18:51,381 INFO L93 Difference]: Finished difference Result 76916 states and 294768 transitions. [2022-12-14 07:18:51,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2022-12-14 07:18:51,381 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 0 states have call successors, (0), 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 23 [2022-12-14 07:18:51,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:18:51,642 INFO L225 Difference]: With dead ends: 76916 [2022-12-14 07:18:51,642 INFO L226 Difference]: Without dead ends: 76916 [2022-12-14 07:18:51,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24597 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=12055, Invalid=46267, Unknown=0, NotChecked=0, Total=58322 [2022-12-14 07:18:51,645 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1910 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3656 mSolverCounterSat, 384 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1910 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 384 IncrementalHoareTripleChecker+Valid, 3656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:18:51,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1910 Valid, 0 Invalid, 4040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [384 Valid, 3656 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-14 07:18:51,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76916 states. [2022-12-14 07:18:53,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76916 to 71568. [2022-12-14 07:18:53,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71568 states, 71567 states have (on average 3.92475582321461) internal successors, (280883), 71567 states have internal predecessors, (280883), 0 states have call successors, (0), 0 states 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 07:18:53,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71568 states to 71568 states and 280883 transitions. [2022-12-14 07:18:53,683 INFO L78 Accepts]: Start accepts. Automaton has 71568 states and 280883 transitions. Word has length 23 [2022-12-14 07:18:53,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:18:53,684 INFO L495 AbstractCegarLoop]: Abstraction has 71568 states and 280883 transitions. [2022-12-14 07:18:53,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 07:18:53,684 INFO L276 IsEmpty]: Start isEmpty. Operand 71568 states and 280883 transitions. [2022-12-14 07:18:53,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 07:18:53,765 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:18:53,765 INFO L195 NwaCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:18:53,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 07:18:53,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 07:18:53,967 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 07:18:53,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:18:53,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1825217185, now seen corresponding path program 2 times [2022-12-14 07:18:53,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:18:53,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316332785] [2022-12-14 07:18:53,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:18:53,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:18:54,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:18:54,505 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:18:54,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:18:54,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316332785] [2022-12-14 07:18:54,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316332785] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:18:54,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876000531] [2022-12-14 07:18:54,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:18:54,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:18:54,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:18:54,506 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:18:54,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 07:18:54,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-12-14 07:18:54,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:18:54,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-14 07:18:54,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:18:55,107 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 78 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:18:55,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:18:55,721 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:18:55,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876000531] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:18:55,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1899215524] [2022-12-14 07:18:55,722 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 07:18:55,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:18:55,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2022-12-14 07:18:55,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331009987] [2022-12-14 07:18:55,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:18:55,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-14 07:18:55,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:18:55,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-14 07:18:55,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=2308, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 07:18:55,724 INFO L87 Difference]: Start difference. First operand 71568 states and 280883 transitions. Second operand has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 07:19:12,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:19:12,567 INFO L93 Difference]: Finished difference Result 137553 states and 522289 transitions. [2022-12-14 07:19:12,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2022-12-14 07:19:12,568 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 0 states have call successors, (0), 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 23 [2022-12-14 07:19:12,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:19:13,054 INFO L225 Difference]: With dead ends: 137553 [2022-12-14 07:19:13,055 INFO L226 Difference]: Without dead ends: 137481 [2022-12-14 07:19:13,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24569 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=12930, Invalid=45392, Unknown=0, NotChecked=0, Total=58322 [2022-12-14 07:19:13,057 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1776 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3437 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1776 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 3437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:19:13,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1776 Valid, 0 Invalid, 3835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 3437 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-12-14 07:19:13,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137481 states. [2022-12-14 07:19:17,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137481 to 105966. [2022-12-14 07:19:17,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105966 states, 105965 states have (on average 4.131883168970886) internal successors, (437835), 105965 states have internal predecessors, (437835), 0 states have call successors, (0), 0 states 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 07:19:17,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105966 states to 105966 states and 437835 transitions. [2022-12-14 07:19:17,648 INFO L78 Accepts]: Start accepts. Automaton has 105966 states and 437835 transitions. Word has length 23 [2022-12-14 07:19:17,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:19:17,649 INFO L495 AbstractCegarLoop]: Abstraction has 105966 states and 437835 transitions. [2022-12-14 07:19:17,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 07:19:17,649 INFO L276 IsEmpty]: Start isEmpty. Operand 105966 states and 437835 transitions. [2022-12-14 07:19:17,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 07:19:17,765 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:19:17,765 INFO L195 NwaCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:19:17,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 07:19:17,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 07:19:17,966 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 07:19:17,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:19:17,969 INFO L85 PathProgramCache]: Analyzing trace with hash 287987635, now seen corresponding path program 3 times [2022-12-14 07:19:17,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:19:17,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433636905] [2022-12-14 07:19:17,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:19:17,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:19:18,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:19:18,718 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:19:18,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:19:18,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433636905] [2022-12-14 07:19:18,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433636905] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:19:18,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196969685] [2022-12-14 07:19:18,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:19:18,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:19:18,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:19:18,719 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:19:18,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 07:19:18,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:19:18,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:19:18,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-14 07:19:18,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:19:19,317 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 66 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:19:19,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:19:20,027 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:19:20,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196969685] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:19:20,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2008425532] [2022-12-14 07:19:20,028 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 07:19:20,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:19:20,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2022-12-14 07:19:20,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681021008] [2022-12-14 07:19:20,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:19:20,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-14 07:19:20,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:19:20,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-14 07:19:20,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=2288, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 07:19:20,030 INFO L87 Difference]: Start difference. First operand 105966 states and 437835 transitions. Second operand has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 07:19:36,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:19:36,478 INFO L93 Difference]: Finished difference Result 251916 states and 1019972 transitions. [2022-12-14 07:19:36,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 214 states. [2022-12-14 07:19:36,479 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 0 states have call successors, (0), 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 23 [2022-12-14 07:19:36,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:19:37,655 INFO L225 Difference]: With dead ends: 251916 [2022-12-14 07:19:37,655 INFO L226 Difference]: Without dead ends: 251596 [2022-12-14 07:19:37,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24676 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=13863, Invalid=46407, Unknown=0, NotChecked=0, Total=60270 [2022-12-14 07:19:37,658 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1485 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3582 mSolverCounterSat, 364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 364 IncrementalHoareTripleChecker+Valid, 3582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:19:37,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1485 Valid, 0 Invalid, 3946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [364 Valid, 3582 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-12-14 07:19:37,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251596 states. [2022-12-14 07:19:47,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251596 to 199525. [2022-12-14 07:19:47,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199525 states, 199524 states have (on average 4.328466750867063) internal successors, (863633), 199524 states have internal predecessors, (863633), 0 states have call successors, (0), 0 states 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 07:19:49,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199525 states to 199525 states and 863633 transitions. [2022-12-14 07:19:49,063 INFO L78 Accepts]: Start accepts. Automaton has 199525 states and 863633 transitions. Word has length 23 [2022-12-14 07:19:49,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:19:49,064 INFO L495 AbstractCegarLoop]: Abstraction has 199525 states and 863633 transitions. [2022-12-14 07:19:49,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 07:19:49,064 INFO L276 IsEmpty]: Start isEmpty. Operand 199525 states and 863633 transitions. [2022-12-14 07:19:49,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 07:19:49,179 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:19:49,179 INFO L195 NwaCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:19:49,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 07:19:49,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:19:49,381 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 07:19:49,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:19:49,383 INFO L85 PathProgramCache]: Analyzing trace with hash -121041759, now seen corresponding path program 4 times [2022-12-14 07:19:49,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:19:49,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708576069] [2022-12-14 07:19:49,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:19:49,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:19:49,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:19:49,887 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:19:49,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:19:49,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708576069] [2022-12-14 07:19:49,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708576069] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:19:49,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375427245] [2022-12-14 07:19:49,887 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 07:19:49,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:19:49,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:19:49,889 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:19:49,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 07:19:49,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:19:49,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-14 07:19:49,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:19:50,492 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 56 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:19:50,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:19:51,069 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:19:51,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375427245] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:19:51,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [248910592] [2022-12-14 07:19:51,070 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 07:19:51,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:19:51,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2022-12-14 07:19:51,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778665202] [2022-12-14 07:19:51,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:19:51,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-14 07:19:51,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:19:51,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-14 07:19:51,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=2300, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 07:19:51,071 INFO L87 Difference]: Start difference. First operand 199525 states and 863633 transitions. Second operand has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 07:20:11,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:20:11,550 INFO L93 Difference]: Finished difference Result 415979 states and 1759761 transitions. [2022-12-14 07:20:11,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 247 states. [2022-12-14 07:20:11,551 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 0 states have call successors, (0), 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 23 [2022-12-14 07:20:11,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:20:13,755 INFO L225 Difference]: With dead ends: 415979 [2022-12-14 07:20:13,756 INFO L226 Difference]: Without dead ends: 415655 [2022-12-14 07:20:13,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 278 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33729 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=17610, Invalid=60510, Unknown=0, NotChecked=0, Total=78120 [2022-12-14 07:20:13,759 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1541 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3859 mSolverCounterSat, 410 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1541 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 410 IncrementalHoareTripleChecker+Valid, 3859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:20:13,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1541 Valid, 0 Invalid, 4269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [410 Valid, 3859 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-12-14 07:20:14,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415655 states. [2022-12-14 07:20:34,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415655 to 359498. [2022-12-14 07:20:34,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359498 states, 359497 states have (on average 4.4579982586780975) internal successors, (1602637), 359497 states have internal predecessors, (1602637), 0 states have call successors, (0), 0 states 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 07:20:36,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359498 states to 359498 states and 1602637 transitions. [2022-12-14 07:20:36,805 INFO L78 Accepts]: Start accepts. Automaton has 359498 states and 1602637 transitions. Word has length 23 [2022-12-14 07:20:36,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:20:36,805 INFO L495 AbstractCegarLoop]: Abstraction has 359498 states and 1602637 transitions. [2022-12-14 07:20:36,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 07:20:36,805 INFO L276 IsEmpty]: Start isEmpty. Operand 359498 states and 1602637 transitions. [2022-12-14 07:20:37,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 07:20:37,012 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:20:37,012 INFO L195 NwaCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:20:37,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 07:20:37,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:20:37,214 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-14 07:20:37,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:20:37,215 INFO L85 PathProgramCache]: Analyzing trace with hash 2129854113, now seen corresponding path program 5 times [2022-12-14 07:20:37,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:20:37,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019338345] [2022-12-14 07:20:37,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:20:37,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:20:37,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:20:37,920 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:20:37,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:20:37,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019338345] [2022-12-14 07:20:37,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019338345] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:20:37,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393394737] [2022-12-14 07:20:37,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:20:37,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:20:37,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:20:37,922 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:20:37,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 07:20:37,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-12-14 07:20:37,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:20:37,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-14 07:20:37,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:20:38,389 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 42 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:20:38,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:20:39,002 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:20:39,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393394737] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:20:39,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1130091271] [2022-12-14 07:20:39,003 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 07:20:39,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:20:39,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2022-12-14 07:20:39,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937930436] [2022-12-14 07:20:39,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:20:39,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-14 07:20:39,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:20:39,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-14 07:20:39,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=2314, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 07:20:39,005 INFO L87 Difference]: Start difference. First operand 359498 states and 1602637 transitions. Second operand has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 07:21:08,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:21:08,056 INFO L93 Difference]: Finished difference Result 685306 states and 2971752 transitions. [2022-12-14 07:21:08,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 290 states. [2022-12-14 07:21:08,057 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 0 states have call successors, (0), 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 23 [2022-12-14 07:21:08,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:21:11,690 INFO L225 Difference]: With dead ends: 685306 [2022-12-14 07:21:11,690 INFO L226 Difference]: Without dead ends: 684681 [2022-12-14 07:21:11,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 321 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45608 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=23106, Invalid=80900, Unknown=0, NotChecked=0, Total=104006 [2022-12-14 07:21:11,695 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2015 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4026 mSolverCounterSat, 574 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2015 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 574 IncrementalHoareTripleChecker+Valid, 4026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:21:11,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2015 Valid, 0 Invalid, 4600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [574 Valid, 4026 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-12-14 07:21:12,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684681 states. [2022-12-14 07:21:45,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684681 to 507491. [2022-12-14 07:21:45,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507491 states, 507490 states have (on average 4.525681294212694) internal successors, (2296738), 507490 states have internal predecessors, (2296738), 0 states have call successors, (0), 0 states 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 07:21:48,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507491 states to 507491 states and 2296738 transitions. [2022-12-14 07:21:48,921 INFO L78 Accepts]: Start accepts. Automaton has 507491 states and 2296738 transitions. Word has length 23 [2022-12-14 07:21:48,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:21:48,921 INFO L495 AbstractCegarLoop]: Abstraction has 507491 states and 2296738 transitions. [2022-12-14 07:21:48,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 07:21:48,921 INFO L276 IsEmpty]: Start isEmpty. Operand 507491 states and 2296738 transitions. [2022-12-14 07:21:49,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 07:21:49,246 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:21:49,246 INFO L195 NwaCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:21:49,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 07:21:49,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 07:21:49,448 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-14 07:21:49,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:21:49,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1141797811, now seen corresponding path program 6 times [2022-12-14 07:21:49,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:21:49,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177785895] [2022-12-14 07:21:49,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:21:49,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:21:49,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:21:49,964 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:21:49,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:21:49,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177785895] [2022-12-14 07:21:49,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177785895] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:21:49,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940793591] [2022-12-14 07:21:49,965 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:21:49,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:21:49,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:21:49,966 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:21:49,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 07:21:50,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:21:50,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:21:50,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-14 07:21:50,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:21:50,477 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 38 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:21:50,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:21:51,242 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:21:51,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940793591] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:21:51,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [179940767] [2022-12-14 07:21:51,243 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 07:21:51,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:21:51,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2022-12-14 07:21:51,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043661458] [2022-12-14 07:21:51,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:21:51,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-14 07:21:51,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:21:51,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-14 07:21:51,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=2314, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 07:21:51,246 INFO L87 Difference]: Start difference. First operand 507491 states and 2296738 transitions. Second operand has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 07:22:24,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:22:24,680 INFO L93 Difference]: Finished difference Result 945874 states and 4145419 transitions. [2022-12-14 07:22:24,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 319 states. [2022-12-14 07:22:24,681 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 0 states have call successors, (0), 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 23 [2022-12-14 07:22:24,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:22:30,011 INFO L225 Difference]: With dead ends: 945874 [2022-12-14 07:22:30,011 INFO L226 Difference]: Without dead ends: 945215 [2022-12-14 07:22:30,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 349 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54622 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=28315, Invalid=94535, Unknown=0, NotChecked=0, Total=122850 [2022-12-14 07:22:30,016 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1790 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4302 mSolverCounterSat, 608 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1790 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 608 IncrementalHoareTripleChecker+Valid, 4302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:22:30,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1790 Valid, 0 Invalid, 4910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [608 Valid, 4302 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-12-14 07:22:31,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945215 states. [2022-12-14 07:23:24,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945215 to 750947. [2022-12-14 07:23:26,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750947 states, 750946 states have (on average 4.5212278912198745) internal successors, (3395198), 750946 states have internal predecessors, (3395198), 0 states have call successors, (0), 0 states 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 07:23:31,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750947 states to 750947 states and 3395198 transitions. [2022-12-14 07:23:31,522 INFO L78 Accepts]: Start accepts. Automaton has 750947 states and 3395198 transitions. Word has length 23 [2022-12-14 07:23:31,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:23:31,523 INFO L495 AbstractCegarLoop]: Abstraction has 750947 states and 3395198 transitions. [2022-12-14 07:23:31,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 07:23:31,523 INFO L276 IsEmpty]: Start isEmpty. Operand 750947 states and 3395198 transitions. [2022-12-14 07:23:31,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 07:23:31,750 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:23:31,750 INFO L195 NwaCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:23:31,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 07:23:31,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 07:23:31,952 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-12-14 07:23:31,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:23:31,953 INFO L85 PathProgramCache]: Analyzing trace with hash 577269921, now seen corresponding path program 7 times [2022-12-14 07:23:31,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:23:31,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335184876] [2022-12-14 07:23:31,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:23:31,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:23:31,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:23:32,451 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:23:32,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:23:32,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335184876] [2022-12-14 07:23:32,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335184876] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:23:32,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457578794] [2022-12-14 07:23:32,451 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 07:23:32,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:23:32,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:23:32,452 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:23:32,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ba0f339-8891-4f63-b654-5646d92179d3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 07:23:32,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:23:32,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-14 07:23:32,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:23:33,108 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 36 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:23:33,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:23:33,717 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:23:33,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457578794] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:23:33,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1736844744] [2022-12-14 07:23:33,718 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 07:23:33,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:23:33,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2022-12-14 07:23:33,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965823607] [2022-12-14 07:23:33,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:23:33,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-14 07:23:33,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:23:33,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-14 07:23:33,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=2322, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 07:23:33,720 INFO L87 Difference]: Start difference. First operand 750947 states and 3395198 transitions. Second operand has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 07:24:09,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:24:09,132 INFO L93 Difference]: Finished difference Result 1155636 states and 5166131 transitions. [2022-12-14 07:24:09,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 331 states. [2022-12-14 07:24:09,133 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 0 states have call successors, (0), 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 23 [2022-12-14 07:24:09,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:24:16,110 INFO L225 Difference]: With dead ends: 1155636 [2022-12-14 07:24:16,110 INFO L226 Difference]: Without dead ends: 1155161 [2022-12-14 07:24:16,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 362 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59244 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=30275, Invalid=101857, Unknown=0, NotChecked=0, Total=132132 [2022-12-14 07:24:16,115 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2569 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4636 mSolverCounterSat, 771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2569 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 771 IncrementalHoareTripleChecker+Valid, 4636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-12-14 07:24:16,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2569 Valid, 0 Invalid, 5407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [771 Valid, 4636 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-12-14 07:24:17,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155161 states. [2022-12-14 07:25:35,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155161 to 961461. [2022-12-14 07:25:36,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961461 states, 961460 states have (on average 4.551654775029642) internal successors, (4376234), 961460 states have internal predecessors, (4376234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)