./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b6c73-4697-4b89-af5d-08fd9289c1c2/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b6c73-4697-4b89-af5d-08fd9289c1c2/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b6c73-4697-4b89-af5d-08fd9289c1c2/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b6c73-4697-4b89-af5d-08fd9289c1c2/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b6c73-4697-4b89-af5d-08fd9289c1c2/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b6c73-4697-4b89-af5d-08fd9289c1c2/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --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 1fe12ce8951e45860142b9cebaa325eef531c18fa917882c03ee5396afb187f5 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 14:26:46,629 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 14:26:46,724 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b6c73-4697-4b89-af5d-08fd9289c1c2/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-12-02 14:26:46,731 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 14:26:46,732 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 14:26:46,771 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 14:26:46,772 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 14:26:46,773 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 14:26:46,774 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 14:26:46,774 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 14:26:46,775 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 14:26:46,775 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 14:26:46,776 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 14:26:46,777 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 14:26:46,777 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 14:26:46,778 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 14:26:46,779 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 14:26:46,779 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 14:26:46,780 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 14:26:46,780 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 14:26:46,781 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 14:26:46,782 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 14:26:46,782 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 14:26:46,783 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 14:26:46,784 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 14:26:46,784 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 14:26:46,785 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 14:26:46,785 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 14:26:46,786 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 14:26:46,786 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 14:26:46,787 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 14:26:46,787 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 14:26:46,788 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 14:26:46,788 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 14:26:46,789 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 14:26:46,789 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 14:26:46,789 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 14:26:46,790 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 14:26:46,790 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 14:26:46,791 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 14:26:46,791 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:26:46,791 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 14:26:46,792 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 14:26:46,792 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 14:26:46,792 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 14:26:46,792 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 14:26:46,793 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 14:26:46,793 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 14:26:46,793 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_de3b6c73-4697-4b89-af5d-08fd9289c1c2/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b6c73-4697-4b89-af5d-08fd9289c1c2/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1fe12ce8951e45860142b9cebaa325eef531c18fa917882c03ee5396afb187f5 [2023-12-02 14:26:47,040 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 14:26:47,060 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 14:26:47,062 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 14:26:47,063 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 14:26:47,064 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 14:26:47,065 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b6c73-4697-4b89-af5d-08fd9289c1c2/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i [2023-12-02 14:26:50,018 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 14:26:50,293 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 14:26:50,293 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b6c73-4697-4b89-af5d-08fd9289c1c2/sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i [2023-12-02 14:26:50,310 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b6c73-4697-4b89-af5d-08fd9289c1c2/bin/utaipan-verify-nQ1chXbOIh/data/786e5f4df/005a4bceeb7b4321a04765ba0e095ac5/FLAG56ab98038 [2023-12-02 14:26:50,323 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b6c73-4697-4b89-af5d-08fd9289c1c2/bin/utaipan-verify-nQ1chXbOIh/data/786e5f4df/005a4bceeb7b4321a04765ba0e095ac5 [2023-12-02 14:26:50,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 14:26:50,326 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 14:26:50,328 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 14:26:50,328 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 14:26:50,333 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 14:26:50,333 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:26:50" (1/1) ... [2023-12-02 14:26:50,335 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a8e36d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:26:50, skipping insertion in model container [2023-12-02 14:26:50,335 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:26:50" (1/1) ... [2023-12-02 14:26:50,390 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 14:26:50,736 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:26:50,753 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 14:26:50,807 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:26:50,858 INFO L206 MainTranslator]: Completed translation [2023-12-02 14:26:50,859 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:26:50 WrapperNode [2023-12-02 14:26:50,859 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 14:26:50,861 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 14:26:50,861 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 14:26:50,861 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 14:26:50,870 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:26:50" (1/1) ... [2023-12-02 14:26:50,888 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:26:50" (1/1) ... [2023-12-02 14:26:50,918 INFO L138 Inliner]: procedures = 173, calls = 38, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 125 [2023-12-02 14:26:50,919 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 14:26:50,920 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 14:26:50,920 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 14:26:50,920 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 14:26:50,931 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:26:50" (1/1) ... [2023-12-02 14:26:50,932 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:26:50" (1/1) ... [2023-12-02 14:26:50,935 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:26:50" (1/1) ... [2023-12-02 14:26:50,936 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:26:50" (1/1) ... [2023-12-02 14:26:50,943 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:26:50" (1/1) ... [2023-12-02 14:26:50,947 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:26:50" (1/1) ... [2023-12-02 14:26:50,950 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:26:50" (1/1) ... [2023-12-02 14:26:50,952 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:26:50" (1/1) ... [2023-12-02 14:26:50,956 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 14:26:50,957 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 14:26:50,957 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 14:26:50,957 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 14:26:50,958 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:26:50" (1/1) ... [2023-12-02 14:26:50,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:26:50,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b6c73-4697-4b89-af5d-08fd9289c1c2/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:26:50,991 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b6c73-4697-4b89-af5d-08fd9289c1c2/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 14:26:50,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b6c73-4697-4b89-af5d-08fd9289c1c2/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 14:26:51,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 14:26:51,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 14:26:51,036 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-12-02 14:26:51,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 14:26:51,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 14:26:51,037 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-12-02 14:26:51,037 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-12-02 14:26:51,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 14:26:51,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 14:26:51,038 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-12-02 14:26:51,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 14:26:51,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 14:26:51,041 WARN L213 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-12-02 14:26:51,197 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 14:26:51,200 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 14:26:51,439 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 14:26:51,628 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 14:26:51,628 INFO L309 CfgBuilder]: Removed 10 assume(true) statements. [2023-12-02 14:26:51,629 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:26:51 BoogieIcfgContainer [2023-12-02 14:26:51,629 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 14:26:51,633 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 14:26:51,633 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 14:26:51,637 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 14:26:51,637 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:26:50" (1/3) ... [2023-12-02 14:26:51,638 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61d33d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:26:51, skipping insertion in model container [2023-12-02 14:26:51,638 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:26:50" (2/3) ... [2023-12-02 14:26:51,639 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61d33d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:26:51, skipping insertion in model container [2023-12-02 14:26:51,639 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:26:51" (3/3) ... [2023-12-02 14:26:51,641 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_05-lockfuns_racefree.i [2023-12-02 14:26:51,664 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 14:26:51,665 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-12-02 14:26:51,665 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-02 14:26:51,708 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-12-02 14:26:51,738 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 54 places, 62 transitions, 131 flow [2023-12-02 14:26:51,798 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 619 states, 604 states have (on average 2.359271523178808) internal successors, (1425), 618 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:26:51,815 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 14:26:51,822 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;@4c5b7e4b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 14:26:51,822 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-12-02 14:26:51,826 INFO L276 IsEmpty]: Start isEmpty. Operand has 619 states, 604 states have (on average 2.359271523178808) internal successors, (1425), 618 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:26:51,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 14:26:51,833 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:26:51,833 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 14:26:51,834 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-12-02 14:26:51,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:26:51,839 INFO L85 PathProgramCache]: Analyzing trace with hash 350918, now seen corresponding path program 1 times [2023-12-02 14:26:51,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:26:51,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124697925] [2023-12-02 14:26:51,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:26:51,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:26:51,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:26:52,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:26:52,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:26:52,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124697925] [2023-12-02 14:26:52,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124697925] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:26:52,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:26:52,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 14:26:52,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118266137] [2023-12-02 14:26:52,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:26:52,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:26:52,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:26:52,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:26:52,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:26:52,157 INFO L87 Difference]: Start difference. First operand has 619 states, 604 states have (on average 2.359271523178808) internal successors, (1425), 618 states have internal predecessors, (1425), 0 states have call successors, (0), 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 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) [2023-12-02 14:26:52,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:26:52,308 INFO L93 Difference]: Finished difference Result 559 states and 1045 transitions. [2023-12-02 14:26:52,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:26:52,311 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 [2023-12-02 14:26:52,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:26:52,329 INFO L225 Difference]: With dead ends: 559 [2023-12-02 14:26:52,329 INFO L226 Difference]: Without dead ends: 539 [2023-12-02 14:26:52,331 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 [2023-12-02 14:26:52,335 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 44 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:26:52,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 23 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:26:52,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2023-12-02 14:26:52,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 539. [2023-12-02 14:26:52,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 530 states have (on average 1.9) internal successors, (1007), 538 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:26:52,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1007 transitions. [2023-12-02 14:26:52,420 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1007 transitions. Word has length 3 [2023-12-02 14:26:52,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:26:52,420 INFO L495 AbstractCegarLoop]: Abstraction has 539 states and 1007 transitions. [2023-12-02 14:26:52,421 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) [2023-12-02 14:26:52,421 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1007 transitions. [2023-12-02 14:26:52,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 14:26:52,421 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:26:52,421 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 14:26:52,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 14:26:52,422 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-12-02 14:26:52,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:26:52,423 INFO L85 PathProgramCache]: Analyzing trace with hash 350919, now seen corresponding path program 1 times [2023-12-02 14:26:52,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:26:52,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424503691] [2023-12-02 14:26:52,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:26:52,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:26:52,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:26:52,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:26:52,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:26:52,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424503691] [2023-12-02 14:26:52,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424503691] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:26:52,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:26:52,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 14:26:52,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871540980] [2023-12-02 14:26:52,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:26:52,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:26:52,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:26:52,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:26:52,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:26:52,569 INFO L87 Difference]: Start difference. First operand 539 states and 1007 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) [2023-12-02 14:26:52,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:26:52,662 INFO L93 Difference]: Finished difference Result 523 states and 990 transitions. [2023-12-02 14:26:52,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:26:52,663 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 [2023-12-02 14:26:52,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:26:52,668 INFO L225 Difference]: With dead ends: 523 [2023-12-02 14:26:52,668 INFO L226 Difference]: Without dead ends: 523 [2023-12-02 14:26:52,668 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 [2023-12-02 14:26:52,670 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:26:52,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 35 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:26:52,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2023-12-02 14:26:52,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 523. [2023-12-02 14:26:52,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 516 states have (on average 1.9186046511627908) internal successors, (990), 522 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:26:52,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 990 transitions. [2023-12-02 14:26:52,728 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 990 transitions. Word has length 3 [2023-12-02 14:26:52,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:26:52,728 INFO L495 AbstractCegarLoop]: Abstraction has 523 states and 990 transitions. [2023-12-02 14:26:52,729 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) [2023-12-02 14:26:52,729 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 990 transitions. [2023-12-02 14:26:52,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 14:26:52,729 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:26:52,729 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2023-12-02 14:26:52,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 14:26:52,730 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-12-02 14:26:52,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:26:52,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1968393028, now seen corresponding path program 1 times [2023-12-02 14:26:52,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:26:52,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238895369] [2023-12-02 14:26:52,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:26:52,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:26:52,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:26:52,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:26:52,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:26:52,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238895369] [2023-12-02 14:26:52,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238895369] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:26:52,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083051160] [2023-12-02 14:26:52,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:26:52,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:26:52,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b6c73-4697-4b89-af5d-08fd9289c1c2/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:26:52,921 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b6c73-4697-4b89-af5d-08fd9289c1c2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:26:52,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b6c73-4697-4b89-af5d-08fd9289c1c2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 14:26:53,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:26:53,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 14:26:53,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:26:53,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:26:53,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:26:53,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:26:53,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:26:53,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083051160] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:26:53,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1565530215] [2023-12-02 14:26:53,263 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:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) 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:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) 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) [2023-12-02 14:26:53,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:26:53,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2023-12-02 14:26:53,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482357741] [2023-12-02 14:26:53,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:26:53,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 14:26:53,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:26:53,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 14:26:53,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-12-02 14:26:53,267 INFO L87 Difference]: Start difference. First operand 523 states and 990 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:26:53,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:26:53,375 INFO L93 Difference]: Finished difference Result 99 states and 170 transitions. [2023-12-02 14:26:53,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 14:26:53,375 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 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 [2023-12-02 14:26:53,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:26:53,377 INFO L225 Difference]: With dead ends: 99 [2023-12-02 14:26:53,377 INFO L226 Difference]: Without dead ends: 99 [2023-12-02 14:26:53,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-02 14:26:53,380 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 153 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:26:53,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 44 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:26:53,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-12-02 14:26:53,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2023-12-02 14:26:53,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.7346938775510203) internal successors, (170), 98 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:26:53,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 170 transitions. [2023-12-02 14:26:53,386 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 170 transitions. Word has length 7 [2023-12-02 14:26:53,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:26:53,386 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 170 transitions. [2023-12-02 14:26:53,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:26:53,387 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 170 transitions. [2023-12-02 14:26:53,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 14:26:53,387 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:26:53,388 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2023-12-02 14:26:53,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b6c73-4697-4b89-af5d-08fd9289c1c2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 14:26:53,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b6c73-4697-4b89-af5d-08fd9289c1c2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-12-02 14:26:53,589 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-12-02 14:26:53,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:26:53,590 INFO L85 PathProgramCache]: Analyzing trace with hash 890642044, now seen corresponding path program 1 times [2023-12-02 14:26:53,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:26:53,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391828698] [2023-12-02 14:26:53,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:26:53,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:26:53,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 14:26:53,614 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 14:26:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 14:26:53,649 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 14:26:53,649 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 14:26:53,650 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-12-02 14:26:53,652 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-12-02 14:26:53,653 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-12-02 14:26:53,653 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 7 remaining) [2023-12-02 14:26:53,653 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-12-02 14:26:53,654 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 7 remaining) [2023-12-02 14:26:53,654 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-12-02 14:26:53,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 14:26:53,658 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-12-02 14:26:53,660 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-02 14:26:53,661 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-12-02 14:26:53,686 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-12-02 14:26:53,690 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 75 places, 88 transitions, 192 flow [2023-12-02 14:26:54,260 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 11981 states, 11955 states have (on average 3.5463822668339606) internal successors, (42397), 11980 states have internal predecessors, (42397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:26:54,262 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 14:26:54,263 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;@4c5b7e4b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 14:26:54,263 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-12-02 14:26:54,295 INFO L276 IsEmpty]: Start isEmpty. Operand has 11981 states, 11955 states have (on average 3.5463822668339606) internal successors, (42397), 11980 states have internal predecessors, (42397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:26:54,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 14:26:54,296 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:26:54,296 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 14:26:54,297 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-12-02 14:26:54,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:26:54,297 INFO L85 PathProgramCache]: Analyzing trace with hash 438302, now seen corresponding path program 1 times [2023-12-02 14:26:54,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:26:54,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038204760] [2023-12-02 14:26:54,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:26:54,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:26:54,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:26:54,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:26:54,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:26:54,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038204760] [2023-12-02 14:26:54,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038204760] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:26:54,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:26:54,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 14:26:54,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910263663] [2023-12-02 14:26:54,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:26:54,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:26:54,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:26:54,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:26:54,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:26:54,369 INFO L87 Difference]: Start difference. First operand has 11981 states, 11955 states have (on average 3.5463822668339606) internal successors, (42397), 11980 states have internal predecessors, (42397), 0 states have call successors, (0), 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 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) [2023-12-02 14:26:54,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:26:54,703 INFO L93 Difference]: Finished difference Result 10819 states and 30279 transitions. [2023-12-02 14:26:54,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:26:54,705 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 [2023-12-02 14:26:54,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:26:54,807 INFO L225 Difference]: With dead ends: 10819 [2023-12-02 14:26:54,807 INFO L226 Difference]: Without dead ends: 10419 [2023-12-02 14:26:54,807 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 [2023-12-02 14:26:54,808 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 64 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:26:54,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 37 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:26:54,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10419 states. [2023-12-02 14:26:55,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10419 to 10419. [2023-12-02 14:26:55,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10419 states, 10404 states have (on average 2.8026720492118415) internal successors, (29159), 10418 states have internal predecessors, (29159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:26:55,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10419 states to 10419 states and 29159 transitions. [2023-12-02 14:26:55,422 INFO L78 Accepts]: Start accepts. Automaton has 10419 states and 29159 transitions. Word has length 3 [2023-12-02 14:26:55,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:26:55,422 INFO L495 AbstractCegarLoop]: Abstraction has 10419 states and 29159 transitions. [2023-12-02 14:26:55,423 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) [2023-12-02 14:26:55,423 INFO L276 IsEmpty]: Start isEmpty. Operand 10419 states and 29159 transitions. [2023-12-02 14:26:55,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 14:26:55,423 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:26:55,424 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 14:26:55,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 14:26:55,424 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-12-02 14:26:55,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:26:55,425 INFO L85 PathProgramCache]: Analyzing trace with hash 438303, now seen corresponding path program 1 times [2023-12-02 14:26:55,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:26:55,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694987995] [2023-12-02 14:26:55,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:26:55,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:26:55,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:26:55,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:26:55,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:26:55,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694987995] [2023-12-02 14:26:55,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694987995] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:26:55,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:26:55,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 14:26:55,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377384044] [2023-12-02 14:26:55,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:26:55,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:26:55,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:26:55,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:26:55,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:26:55,512 INFO L87 Difference]: Start difference. First operand 10419 states and 29159 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) [2023-12-02 14:26:55,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:26:55,857 INFO L93 Difference]: Finished difference Result 10403 states and 29142 transitions. [2023-12-02 14:26:55,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:26:55,858 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 [2023-12-02 14:26:55,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:26:55,944 INFO L225 Difference]: With dead ends: 10403 [2023-12-02 14:26:55,944 INFO L226 Difference]: Without dead ends: 10403 [2023-12-02 14:26:55,945 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 [2023-12-02 14:26:55,946 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 20 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:26:55,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 49 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:26:56,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10403 states. [2023-12-02 14:26:56,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10403 to 10403. [2023-12-02 14:26:56,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10403 states, 10390 states have (on average 2.8048123195380175) internal successors, (29142), 10402 states have internal predecessors, (29142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:26:56,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10403 states to 10403 states and 29142 transitions. [2023-12-02 14:26:56,419 INFO L78 Accepts]: Start accepts. Automaton has 10403 states and 29142 transitions. Word has length 3 [2023-12-02 14:26:56,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:26:56,419 INFO L495 AbstractCegarLoop]: Abstraction has 10403 states and 29142 transitions. [2023-12-02 14:26:56,420 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) [2023-12-02 14:26:56,420 INFO L276 IsEmpty]: Start isEmpty. Operand 10403 states and 29142 transitions. [2023-12-02 14:26:56,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 14:26:56,420 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:26:56,421 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2023-12-02 14:26:56,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 14:26:56,421 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-12-02 14:26:56,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:26:56,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1068397444, now seen corresponding path program 1 times [2023-12-02 14:26:56,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:26:56,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896075807] [2023-12-02 14:26:56,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:26:56,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:26:56,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:26:56,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:26:56,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:26:56,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896075807] [2023-12-02 14:26:56,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896075807] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:26:56,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229750672] [2023-12-02 14:26:56,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:26:56,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:26:56,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b6c73-4697-4b89-af5d-08fd9289c1c2/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:26:56,613 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b6c73-4697-4b89-af5d-08fd9289c1c2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:26:56,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b6c73-4697-4b89-af5d-08fd9289c1c2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 14:26:56,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:26:56,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 14:26:56,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:26:56,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:26:56,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:26:56,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:26:56,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:26:56,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229750672] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:26:56,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1231498896] [2023-12-02 14:26:56,883 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:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) 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:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) 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) [2023-12-02 14:26:56,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:26:56,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2023-12-02 14:26:56,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89258302] [2023-12-02 14:26:56,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:26:56,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 14:26:56,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:26:56,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 14:26:56,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-12-02 14:26:56,885 INFO L87 Difference]: Start difference. First operand 10403 states and 29142 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:26:57,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:26:57,383 INFO L93 Difference]: Finished difference Result 9738 states and 27486 transitions. [2023-12-02 14:26:57,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 14:26:57,383 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 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 [2023-12-02 14:26:57,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:26:57,404 INFO L225 Difference]: With dead ends: 9738 [2023-12-02 14:26:57,404 INFO L226 Difference]: Without dead ends: 9738 [2023-12-02 14:26:57,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-12-02 14:26:57,405 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 283 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:26:57,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 180 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:26:57,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9738 states. [2023-12-02 14:26:57,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9738 to 9738. [2023-12-02 14:26:57,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9738 states, 9728 states have (on average 2.8254523026315788) internal successors, (27486), 9737 states have internal predecessors, (27486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:26:57,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9738 states to 9738 states and 27486 transitions. [2023-12-02 14:26:57,731 INFO L78 Accepts]: Start accepts. Automaton has 9738 states and 27486 transitions. Word has length 7 [2023-12-02 14:26:57,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:26:57,732 INFO L495 AbstractCegarLoop]: Abstraction has 9738 states and 27486 transitions. [2023-12-02 14:26:57,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:26:57,732 INFO L276 IsEmpty]: Start isEmpty. Operand 9738 states and 27486 transitions. [2023-12-02 14:26:57,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 14:26:57,733 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:26:57,733 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2023-12-02 14:26:57,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b6c73-4697-4b89-af5d-08fd9289c1c2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 14:26:57,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b6c73-4697-4b89-af5d-08fd9289c1c2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-12-02 14:26:57,934 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-12-02 14:26:57,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:26:57,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1807635992, now seen corresponding path program 1 times [2023-12-02 14:26:57,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:26:57,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623170613] [2023-12-02 14:26:57,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:26:57,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:26:57,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 14:26:57,952 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 14:26:57,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 14:26:57,969 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 14:26:57,969 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 14:26:57,969 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-12-02 14:26:57,970 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-12-02 14:26:57,970 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-12-02 14:26:57,970 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 7 remaining) [2023-12-02 14:26:57,970 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-12-02 14:26:57,970 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 7 remaining) [2023-12-02 14:26:57,971 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-12-02 14:26:57,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 14:26:57,971 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-12-02 14:26:57,972 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-02 14:26:57,972 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-12-02 14:26:57,998 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-12-02 14:26:58,000 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 96 places, 114 transitions, 255 flow [2023-12-02 14:27:06,193 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 231279 states, 231234 states have (on average 4.780594549244488) internal successors, (1105436), 231278 states have internal predecessors, (1105436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:27:06,198 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 14:27:06,201 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;@4c5b7e4b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 14:27:06,201 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-12-02 14:27:06,591 INFO L276 IsEmpty]: Start isEmpty. Operand has 231279 states, 231234 states have (on average 4.780594549244488) internal successors, (1105436), 231278 states have internal predecessors, (1105436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:27:06,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 14:27:06,592 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:27:06,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 14:27:06,592 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-12-02 14:27:06,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:27:06,593 INFO L85 PathProgramCache]: Analyzing trace with hash 551504, now seen corresponding path program 1 times [2023-12-02 14:27:06,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:27:06,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597121973] [2023-12-02 14:27:06,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:27:06,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:27:06,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:27:06,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:27:06,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:27:06,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597121973] [2023-12-02 14:27:06,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597121973] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:27:06,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:27:06,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 14:27:06,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905887583] [2023-12-02 14:27:06,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:27:06,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:27:06,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:27:06,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:27:06,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:27:07,017 INFO L87 Difference]: Start difference. First operand has 231279 states, 231234 states have (on average 4.780594549244488) internal successors, (1105436), 231278 states have internal predecessors, (1105436), 0 states have call successors, (0), 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 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) [2023-12-02 14:27:10,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:27:10,595 INFO L93 Difference]: Finished difference Result 208799 states and 779100 transitions. [2023-12-02 14:27:10,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:27:10,595 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 [2023-12-02 14:27:10,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:27:12,487 INFO L225 Difference]: With dead ends: 208799 [2023-12-02 14:27:12,487 INFO L226 Difference]: Without dead ends: 200799 [2023-12-02 14:27:12,488 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 [2023-12-02 14:27:12,490 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 84 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 14:27:12,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 51 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 14:27:13,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200799 states. [2023-12-02 14:27:19,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200799 to 200799. [2023-12-02 14:27:19,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200799 states, 200774 states have (on average 3.733053084562742) internal successors, (749500), 200798 states have internal predecessors, (749500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:27:21,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200799 states to 200799 states and 749500 transitions. [2023-12-02 14:27:21,271 INFO L78 Accepts]: Start accepts. Automaton has 200799 states and 749500 transitions. Word has length 3 [2023-12-02 14:27:21,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:27:21,272 INFO L495 AbstractCegarLoop]: Abstraction has 200799 states and 749500 transitions. [2023-12-02 14:27:21,272 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) [2023-12-02 14:27:21,272 INFO L276 IsEmpty]: Start isEmpty. Operand 200799 states and 749500 transitions. [2023-12-02 14:27:21,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 14:27:21,273 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:27:21,273 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 14:27:21,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 14:27:21,273 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-12-02 14:27:21,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:27:21,274 INFO L85 PathProgramCache]: Analyzing trace with hash 551505, now seen corresponding path program 1 times [2023-12-02 14:27:21,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:27:21,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527532029] [2023-12-02 14:27:21,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:27:21,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:27:21,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:27:21,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:27:21,364 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:27:21,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527532029] [2023-12-02 14:27:21,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527532029] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:27:21,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:27:21,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 14:27:21,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701356795] [2023-12-02 14:27:21,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:27:21,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:27:21,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:27:21,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:27:21,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:27:21,367 INFO L87 Difference]: Start difference. First operand 200799 states and 749500 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) [2023-12-02 14:27:23,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:27:23,630 INFO L93 Difference]: Finished difference Result 200783 states and 749483 transitions. [2023-12-02 14:27:23,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:27:23,631 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 [2023-12-02 14:27:23,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:27:25,014 INFO L225 Difference]: With dead ends: 200783 [2023-12-02 14:27:25,014 INFO L226 Difference]: Without dead ends: 200783 [2023-12-02 14:27:25,014 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 [2023-12-02 14:27:25,015 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 20 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:27:25,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 63 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:27:25,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200783 states. [2023-12-02 14:27:31,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200783 to 200783. [2023-12-02 14:27:31,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200783 states, 200760 states have (on average 3.733228730822873) internal successors, (749483), 200782 states have internal predecessors, (749483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:27:32,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200783 states to 200783 states and 749483 transitions. [2023-12-02 14:27:32,836 INFO L78 Accepts]: Start accepts. Automaton has 200783 states and 749483 transitions. Word has length 3 [2023-12-02 14:27:32,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:27:32,836 INFO L495 AbstractCegarLoop]: Abstraction has 200783 states and 749483 transitions. [2023-12-02 14:27:32,836 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) [2023-12-02 14:27:32,836 INFO L276 IsEmpty]: Start isEmpty. Operand 200783 states and 749483 transitions. [2023-12-02 14:27:32,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 14:27:32,837 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:27:32,837 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2023-12-02 14:27:32,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 14:27:32,837 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-12-02 14:27:32,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:27:32,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1757136354, now seen corresponding path program 1 times [2023-12-02 14:27:32,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:27:32,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893674868] [2023-12-02 14:27:32,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:27:32,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:27:32,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:27:32,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:27:32,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:27:32,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893674868] [2023-12-02 14:27:32,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893674868] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:27:32,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659203020] [2023-12-02 14:27:32,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:27:32,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:27:32,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b6c73-4697-4b89-af5d-08fd9289c1c2/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:27:32,961 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b6c73-4697-4b89-af5d-08fd9289c1c2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:27:32,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b6c73-4697-4b89-af5d-08fd9289c1c2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 14:27:33,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:27:33,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 14:27:33,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:27:33,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:27:33,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:27:33,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:27:33,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:27:33,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659203020] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:27:33,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2017873947] [2023-12-02 14:27:33,197 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:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) 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:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) 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) [2023-12-02 14:27:33,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:27:33,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2023-12-02 14:27:33,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380635998] [2023-12-02 14:27:33,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:27:33,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 14:27:33,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:27:33,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 14:27:33,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-12-02 14:27:33,200 INFO L87 Difference]: Start difference. First operand 200783 states and 749483 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:27:35,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:27:35,616 INFO L93 Difference]: Finished difference Result 193259 states and 721474 transitions. [2023-12-02 14:27:35,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 14:27:35,617 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 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 [2023-12-02 14:27:35,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:27:36,844 INFO L225 Difference]: With dead ends: 193259 [2023-12-02 14:27:36,844 INFO L226 Difference]: Without dead ends: 193259 [2023-12-02 14:27:36,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-12-02 14:27:36,845 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 414 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 14:27:36,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 258 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 14:27:37,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193259 states. [2023-12-02 14:27:43,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193259 to 193259. [2023-12-02 14:27:43,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193259 states, 193240 states have (on average 3.7335644794038503) internal successors, (721474), 193258 states have internal predecessors, (721474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:27:45,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193259 states to 193259 states and 721474 transitions. [2023-12-02 14:27:45,035 INFO L78 Accepts]: Start accepts. Automaton has 193259 states and 721474 transitions. Word has length 7 [2023-12-02 14:27:45,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:27:45,035 INFO L495 AbstractCegarLoop]: Abstraction has 193259 states and 721474 transitions. [2023-12-02 14:27:45,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:27:45,036 INFO L276 IsEmpty]: Start isEmpty. Operand 193259 states and 721474 transitions. [2023-12-02 14:27:45,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 14:27:45,041 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:27:45,041 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2023-12-02 14:27:45,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b6c73-4697-4b89-af5d-08fd9289c1c2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-02 14:27:45,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b6c73-4697-4b89-af5d-08fd9289c1c2/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-02 14:27:45,242 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2023-12-02 14:27:45,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:27:45,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1867556603, now seen corresponding path program 1 times [2023-12-02 14:27:45,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:27:45,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612314291] [2023-12-02 14:27:45,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:27:45,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:27:45,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 14:27:45,267 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 14:27:45,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 14:27:45,289 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 14:27:45,289 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 14:27:45,290 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-12-02 14:27:45,290 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-12-02 14:27:45,290 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-12-02 14:27:45,290 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 7 remaining) [2023-12-02 14:27:45,291 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-12-02 14:27:45,291 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 7 remaining) [2023-12-02 14:27:45,291 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-12-02 14:27:45,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 14:27:45,292 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-12-02 14:27:45,292 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-02 14:27:45,292 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-12-02 14:27:45,325 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-12-02 14:27:45,329 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 117 places, 140 transitions, 320 flow