./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_51-mutexptr_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2372e33-ef5a-4f14-a87c-42e5235e6a0f/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2372e33-ef5a-4f14-a87c-42e5235e6a0f/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_c2372e33-ef5a-4f14-a87c-42e5235e6a0f/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2372e33-ef5a-4f14-a87c-42e5235e6a0f/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_51-mutexptr_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2372e33-ef5a-4f14-a87c-42e5235e6a0f/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_c2372e33-ef5a-4f14-a87c-42e5235e6a0f/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 f222d5749b9bb10b4d4c09b2c40e45ee19dec77732a8593ce917652e8ca8a43e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 19:39:32,684 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 19:39:32,760 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2372e33-ef5a-4f14-a87c-42e5235e6a0f/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-12-02 19:39:32,765 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 19:39:32,766 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 19:39:32,793 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 19:39:32,793 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 19:39:32,794 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 19:39:32,795 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 19:39:32,795 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 19:39:32,796 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 19:39:32,796 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 19:39:32,797 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 19:39:32,797 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 19:39:32,798 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 19:39:32,798 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 19:39:32,799 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 19:39:32,799 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 19:39:32,800 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 19:39:32,800 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 19:39:32,801 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 19:39:32,802 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 19:39:32,803 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 19:39:32,803 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 19:39:32,804 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 19:39:32,804 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 19:39:32,804 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 19:39:32,805 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 19:39:32,805 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 19:39:32,806 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 19:39:32,806 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 19:39:32,806 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 19:39:32,807 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 19:39:32,807 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 19:39:32,807 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 19:39:32,808 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 19:39:32,808 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 19:39:32,808 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 19:39:32,808 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 19:39:32,809 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 19:39:32,809 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:39:32,809 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 19:39:32,810 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 19:39:32,810 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 19:39:32,810 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 19:39:32,810 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 19:39:32,810 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 19:39:32,811 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 19:39:32,811 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_c2372e33-ef5a-4f14-a87c-42e5235e6a0f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2372e33-ef5a-4f14-a87c-42e5235e6a0f/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f222d5749b9bb10b4d4c09b2c40e45ee19dec77732a8593ce917652e8ca8a43e [2023-12-02 19:39:33,091 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 19:39:33,111 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 19:39:33,113 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 19:39:33,114 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 19:39:33,115 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 19:39:33,116 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2372e33-ef5a-4f14-a87c-42e5235e6a0f/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/goblint-regression/28-race_reach_51-mutexptr_racefree.i [2023-12-02 19:39:35,931 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 19:39:36,148 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 19:39:36,149 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2372e33-ef5a-4f14-a87c-42e5235e6a0f/sv-benchmarks/c/goblint-regression/28-race_reach_51-mutexptr_racefree.i [2023-12-02 19:39:36,162 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2372e33-ef5a-4f14-a87c-42e5235e6a0f/bin/utaipan-verify-nQ1chXbOIh/data/09a639291/1c8cf149d86d471eb1e99a4db699cdca/FLAGdbd19dc68 [2023-12-02 19:39:36,175 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2372e33-ef5a-4f14-a87c-42e5235e6a0f/bin/utaipan-verify-nQ1chXbOIh/data/09a639291/1c8cf149d86d471eb1e99a4db699cdca [2023-12-02 19:39:36,178 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 19:39:36,180 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 19:39:36,181 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 19:39:36,181 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 19:39:36,187 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 19:39:36,188 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:39:36" (1/1) ... [2023-12-02 19:39:36,189 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f0d88b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:39:36, skipping insertion in model container [2023-12-02 19:39:36,189 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:39:36" (1/1) ... [2023-12-02 19:39:36,236 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 19:39:36,563 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:39:36,579 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 19:39:36,628 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:39:36,675 INFO L206 MainTranslator]: Completed translation [2023-12-02 19:39:36,676 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:39:36 WrapperNode [2023-12-02 19:39:36,676 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 19:39:36,678 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 19:39:36,678 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 19:39:36,678 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 19:39:36,687 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:39:36" (1/1) ... [2023-12-02 19:39:36,704 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:39:36" (1/1) ... [2023-12-02 19:39:36,732 INFO L138 Inliner]: procedures = 171, calls = 43, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 98 [2023-12-02 19:39:36,732 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 19:39:36,733 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 19:39:36,734 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 19:39:36,734 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 19:39:36,744 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:39:36" (1/1) ... [2023-12-02 19:39:36,744 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:39:36" (1/1) ... [2023-12-02 19:39:36,748 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:39:36" (1/1) ... [2023-12-02 19:39:36,748 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:39:36" (1/1) ... [2023-12-02 19:39:36,757 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:39:36" (1/1) ... [2023-12-02 19:39:36,761 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:39:36" (1/1) ... [2023-12-02 19:39:36,763 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:39:36" (1/1) ... [2023-12-02 19:39:36,765 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:39:36" (1/1) ... [2023-12-02 19:39:36,769 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 19:39:36,770 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 19:39:36,770 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 19:39:36,770 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 19:39:36,771 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:39:36" (1/1) ... [2023-12-02 19:39:36,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:39:36,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2372e33-ef5a-4f14-a87c-42e5235e6a0f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:39:36,804 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2372e33-ef5a-4f14-a87c-42e5235e6a0f/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 19:39:36,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2372e33-ef5a-4f14-a87c-42e5235e6a0f/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 19:39:36,838 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 19:39:36,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 19:39:36,838 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-12-02 19:39:36,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 19:39:36,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 19:39:36,839 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-12-02 19:39:36,839 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-12-02 19:39:36,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 19:39:36,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 19:39:36,840 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-12-02 19:39:36,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 19:39:36,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 19:39:36,842 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 19:39:36,986 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 19:39:36,988 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 19:39:37,257 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 19:39:37,496 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 19:39:37,496 INFO L309 CfgBuilder]: Removed 10 assume(true) statements. [2023-12-02 19:39:37,497 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:39:37 BoogieIcfgContainer [2023-12-02 19:39:37,497 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 19:39:37,500 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 19:39:37,500 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 19:39:37,504 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 19:39:37,504 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:39:36" (1/3) ... [2023-12-02 19:39:37,505 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@175617b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:39:37, skipping insertion in model container [2023-12-02 19:39:37,505 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:39:36" (2/3) ... [2023-12-02 19:39:37,506 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@175617b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:39:37, skipping insertion in model container [2023-12-02 19:39:37,506 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:39:37" (3/3) ... [2023-12-02 19:39:37,507 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_51-mutexptr_racefree.i [2023-12-02 19:39:37,528 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 19:39:37,529 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-12-02 19:39:37,529 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-02 19:39:37,579 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-12-02 19:39:37,614 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 67 places, 75 transitions, 157 flow [2023-12-02 19:39:37,704 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1022 states, 915 states have (on average 2.4830601092896174) internal successors, (2272), 1021 states have internal predecessors, (2272), 0 states have call successors, (0), 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 19:39:37,726 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 19:39:37,734 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;@69705a12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 19:39:37,734 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2023-12-02 19:39:37,740 INFO L276 IsEmpty]: Start isEmpty. Operand has 1022 states, 915 states have (on average 2.4830601092896174) internal successors, (2272), 1021 states have internal predecessors, (2272), 0 states have call successors, (0), 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 19:39:37,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 19:39:37,747 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:39:37,748 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 19:39:37,748 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-12-02 19:39:37,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:39:37,754 INFO L85 PathProgramCache]: Analyzing trace with hash 391828, now seen corresponding path program 1 times [2023-12-02 19:39:37,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:39:37,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207617027] [2023-12-02 19:39:37,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:39:37,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:39:37,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:39:38,031 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 19:39:38,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:39:38,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207617027] [2023-12-02 19:39:38,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207617027] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:39:38,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:39:38,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 19:39:38,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073562266] [2023-12-02 19:39:38,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:39:38,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:39:38,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:39:38,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:39:38,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:39:38,070 INFO L87 Difference]: Start difference. First operand has 1022 states, 915 states have (on average 2.4830601092896174) internal successors, (2272), 1021 states have internal predecessors, (2272), 0 states have call successors, (0), 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 19:39:38,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:39:38,219 INFO L93 Difference]: Finished difference Result 929 states and 1770 transitions. [2023-12-02 19:39:38,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:39:38,222 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 19:39:38,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:39:38,244 INFO L225 Difference]: With dead ends: 929 [2023-12-02 19:39:38,244 INFO L226 Difference]: Without dead ends: 921 [2023-12-02 19:39:38,246 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 19:39:38,249 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:39:38,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 37 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:39:38,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2023-12-02 19:39:38,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 921. [2023-12-02 19:39:38,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 836 states have (on average 2.099282296650718) internal successors, (1755), 920 states have internal predecessors, (1755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:39:38,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 1755 transitions. [2023-12-02 19:39:38,348 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 1755 transitions. Word has length 3 [2023-12-02 19:39:38,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:39:38,348 INFO L495 AbstractCegarLoop]: Abstraction has 921 states and 1755 transitions. [2023-12-02 19:39:38,349 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 19:39:38,349 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 1755 transitions. [2023-12-02 19:39:38,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 19:39:38,349 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:39:38,349 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 19:39:38,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 19:39:38,350 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-12-02 19:39:38,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:39:38,351 INFO L85 PathProgramCache]: Analyzing trace with hash 391829, now seen corresponding path program 1 times [2023-12-02 19:39:38,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:39:38,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666512256] [2023-12-02 19:39:38,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:39:38,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:39:38,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:39:38,496 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 19:39:38,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:39:38,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666512256] [2023-12-02 19:39:38,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666512256] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:39:38,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:39:38,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 19:39:38,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896162909] [2023-12-02 19:39:38,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:39:38,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:39:38,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:39:38,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:39:38,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:39:38,511 INFO L87 Difference]: Start difference. First operand 921 states and 1755 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 19:39:38,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:39:38,623 INFO L93 Difference]: Finished difference Result 903 states and 1736 transitions. [2023-12-02 19:39:38,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:39:38,624 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 19:39:38,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:39:38,631 INFO L225 Difference]: With dead ends: 903 [2023-12-02 19:39:38,631 INFO L226 Difference]: Without dead ends: 903 [2023-12-02 19:39:38,631 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 19:39:38,633 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 31 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:39:38,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 52 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:39:38,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2023-12-02 19:39:38,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 903. [2023-12-02 19:39:38,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 822 states have (on average 2.1119221411192215) internal successors, (1736), 902 states have internal predecessors, (1736), 0 states have call successors, (0), 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 19:39:38,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1736 transitions. [2023-12-02 19:39:38,659 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1736 transitions. Word has length 3 [2023-12-02 19:39:38,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:39:38,659 INFO L495 AbstractCegarLoop]: Abstraction has 903 states and 1736 transitions. [2023-12-02 19:39:38,659 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 19:39:38,659 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1736 transitions. [2023-12-02 19:39:38,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 19:39:38,660 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:39:38,660 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2023-12-02 19:39:38,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 19:39:38,661 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-12-02 19:39:38,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:39:38,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1096776181, now seen corresponding path program 1 times [2023-12-02 19:39:38,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:39:38,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429047456] [2023-12-02 19:39:38,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:39:38,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:39:38,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:39:38,831 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 19:39:38,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:39:38,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429047456] [2023-12-02 19:39:38,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429047456] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:39:38,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127678231] [2023-12-02 19:39:38,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:39:38,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:39:38,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2372e33-ef5a-4f14-a87c-42e5235e6a0f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:39:38,839 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2372e33-ef5a-4f14-a87c-42e5235e6a0f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:39:38,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2372e33-ef5a-4f14-a87c-42e5235e6a0f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 19:39:38,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:39:38,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 19:39:38,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:39:39,023 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 19:39:39,092 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 19:39:39,092 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:39:39,170 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 19:39:39,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127678231] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:39:39,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2126131915] [2023-12-02 19:39:39,179 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 19:39:39,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:39:39,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2023-12-02 19:39:39,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051933064] [2023-12-02 19:39:39,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:39:39,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 19:39:39,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:39:39,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 19:39:39,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-12-02 19:39:39,183 INFO L87 Difference]: Start difference. First operand 903 states and 1736 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 19:39:39,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:39:39,307 INFO L93 Difference]: Finished difference Result 154 states and 269 transitions. [2023-12-02 19:39:39,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:39:39,307 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 19:39:39,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:39:39,309 INFO L225 Difference]: With dead ends: 154 [2023-12-02 19:39:39,309 INFO L226 Difference]: Without dead ends: 154 [2023-12-02 19:39:39,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-12-02 19:39:39,311 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 209 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:39:39,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 67 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:39:39,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-12-02 19:39:39,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2023-12-02 19:39:39,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 145 states have (on average 1.8551724137931034) internal successors, (269), 153 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:39:39,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 269 transitions. [2023-12-02 19:39:39,318 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 269 transitions. Word has length 7 [2023-12-02 19:39:39,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:39:39,319 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 269 transitions. [2023-12-02 19:39:39,319 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 19:39:39,319 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 269 transitions. [2023-12-02 19:39:39,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 19:39:39,320 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:39:39,320 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2023-12-02 19:39:39,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2372e33-ef5a-4f14-a87c-42e5235e6a0f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 19:39:39,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2372e33-ef5a-4f14-a87c-42e5235e6a0f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:39:39,524 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-12-02 19:39:39,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:39:39,524 INFO L85 PathProgramCache]: Analyzing trace with hash -359676376, now seen corresponding path program 1 times [2023-12-02 19:39:39,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:39:39,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556464779] [2023-12-02 19:39:39,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:39:39,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:39:39,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 19:39:39,546 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 19:39:39,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 19:39:39,578 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 19:39:39,578 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 19:39:39,579 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (24 of 25 remaining) [2023-12-02 19:39:39,582 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 25 remaining) [2023-12-02 19:39:39,582 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 25 remaining) [2023-12-02 19:39:39,582 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 25 remaining) [2023-12-02 19:39:39,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 25 remaining) [2023-12-02 19:39:39,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 25 remaining) [2023-12-02 19:39:39,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 25 remaining) [2023-12-02 19:39:39,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (17 of 25 remaining) [2023-12-02 19:39:39,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (16 of 25 remaining) [2023-12-02 19:39:39,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 25 remaining) [2023-12-02 19:39:39,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 25 remaining) [2023-12-02 19:39:39,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 25 remaining) [2023-12-02 19:39:39,585 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 25 remaining) [2023-12-02 19:39:39,585 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 25 remaining) [2023-12-02 19:39:39,585 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 25 remaining) [2023-12-02 19:39:39,585 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 25 remaining) [2023-12-02 19:39:39,586 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 25 remaining) [2023-12-02 19:39:39,586 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 25 remaining) [2023-12-02 19:39:39,586 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 25 remaining) [2023-12-02 19:39:39,586 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 25 remaining) [2023-12-02 19:39:39,586 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 25 remaining) [2023-12-02 19:39:39,587 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 25 remaining) [2023-12-02 19:39:39,587 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 25 remaining) [2023-12-02 19:39:39,587 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 25 remaining) [2023-12-02 19:39:39,588 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 25 remaining) [2023-12-02 19:39:39,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 19:39:39,591 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-12-02 19:39:39,593 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-02 19:39:39,593 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-12-02 19:39:39,627 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-12-02 19:39:39,631 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 99 places, 112 transitions, 240 flow [2023-12-02 19:39:40,574 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 30992 states, 29976 states have (on average 3.490058713637577) internal successors, (104618), 30991 states have internal predecessors, (104618), 0 states have call successors, (0), 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 19:39:40,575 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 19:39:40,576 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;@69705a12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 19:39:40,576 INFO L358 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2023-12-02 19:39:40,638 INFO L276 IsEmpty]: Start isEmpty. Operand has 30992 states, 29976 states have (on average 3.490058713637577) internal successors, (104618), 30991 states have internal predecessors, (104618), 0 states have call successors, (0), 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 19:39:40,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 19:39:40,638 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:39:40,638 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 19:39:40,639 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-12-02 19:39:40,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:39:40,639 INFO L85 PathProgramCache]: Analyzing trace with hash 503044, now seen corresponding path program 1 times [2023-12-02 19:39:40,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:39:40,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129716877] [2023-12-02 19:39:40,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:39:40,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:39:40,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:39:40,674 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 19:39:40,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:39:40,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129716877] [2023-12-02 19:39:40,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129716877] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:39:40,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:39:40,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 19:39:40,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862024006] [2023-12-02 19:39:40,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:39:40,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:39:40,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:39:40,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:39:40,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:39:40,726 INFO L87 Difference]: Start difference. First operand has 30992 states, 29976 states have (on average 3.490058713637577) internal successors, (104618), 30991 states have internal predecessors, (104618), 0 states have call successors, (0), 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 19:39:41,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:39:41,355 INFO L93 Difference]: Finished difference Result 28169 states and 80603 transitions. [2023-12-02 19:39:41,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:39:41,356 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 19:39:41,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:39:41,595 INFO L225 Difference]: With dead ends: 28169 [2023-12-02 19:39:41,595 INFO L226 Difference]: Without dead ends: 28105 [2023-12-02 19:39:41,596 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 19:39:41,597 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 88 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:39:41,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 63 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:39:41,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28105 states. [2023-12-02 19:39:42,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28105 to 28105. [2023-12-02 19:39:42,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28105 states, 27284 states have (on average 2.9477715877437327) internal successors, (80427), 28104 states have internal predecessors, (80427), 0 states have call successors, (0), 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 19:39:43,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28105 states to 28105 states and 80427 transitions. [2023-12-02 19:39:43,011 INFO L78 Accepts]: Start accepts. Automaton has 28105 states and 80427 transitions. Word has length 3 [2023-12-02 19:39:43,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:39:43,012 INFO L495 AbstractCegarLoop]: Abstraction has 28105 states and 80427 transitions. [2023-12-02 19:39:43,013 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 19:39:43,013 INFO L276 IsEmpty]: Start isEmpty. Operand 28105 states and 80427 transitions. [2023-12-02 19:39:43,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 19:39:43,018 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:39:43,018 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 19:39:43,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 19:39:43,019 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-12-02 19:39:43,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:39:43,019 INFO L85 PathProgramCache]: Analyzing trace with hash 503045, now seen corresponding path program 1 times [2023-12-02 19:39:43,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:39:43,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263626368] [2023-12-02 19:39:43,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:39:43,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:39:43,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:39:43,083 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 19:39:43,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:39:43,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263626368] [2023-12-02 19:39:43,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263626368] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:39:43,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:39:43,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 19:39:43,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001544544] [2023-12-02 19:39:43,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:39:43,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:39:43,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:39:43,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:39:43,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:39:43,086 INFO L87 Difference]: Start difference. First operand 28105 states and 80427 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 19:39:43,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:39:43,449 INFO L93 Difference]: Finished difference Result 28087 states and 80408 transitions. [2023-12-02 19:39:43,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:39:43,450 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 19:39:43,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:39:43,562 INFO L225 Difference]: With dead ends: 28087 [2023-12-02 19:39:43,562 INFO L226 Difference]: Without dead ends: 28087 [2023-12-02 19:39:43,562 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 19:39:43,563 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 31 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:39:43,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 82 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:39:43,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28087 states. [2023-12-02 19:39:44,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28087 to 28087. [2023-12-02 19:39:44,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28087 states, 27270 states have (on average 2.9485881921525485) internal successors, (80408), 28086 states have internal predecessors, (80408), 0 states have call successors, (0), 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 19:39:44,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28087 states to 28087 states and 80408 transitions. [2023-12-02 19:39:44,640 INFO L78 Accepts]: Start accepts. Automaton has 28087 states and 80408 transitions. Word has length 3 [2023-12-02 19:39:44,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:39:44,641 INFO L495 AbstractCegarLoop]: Abstraction has 28087 states and 80408 transitions. [2023-12-02 19:39:44,641 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 19:39:44,641 INFO L276 IsEmpty]: Start isEmpty. Operand 28087 states and 80408 transitions. [2023-12-02 19:39:44,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 19:39:44,642 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:39:44,642 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2023-12-02 19:39:44,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 19:39:44,642 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-12-02 19:39:44,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:39:44,643 INFO L85 PathProgramCache]: Analyzing trace with hash 732363106, now seen corresponding path program 1 times [2023-12-02 19:39:44,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:39:44,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237450458] [2023-12-02 19:39:44,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:39:44,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:39:44,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:39:44,754 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 19:39:44,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:39:44,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237450458] [2023-12-02 19:39:44,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237450458] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:39:44,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970974427] [2023-12-02 19:39:44,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:39:44,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:39:44,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2372e33-ef5a-4f14-a87c-42e5235e6a0f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:39:44,757 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2372e33-ef5a-4f14-a87c-42e5235e6a0f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:39:44,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2372e33-ef5a-4f14-a87c-42e5235e6a0f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 19:39:44,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:39:44,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 19:39:44,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:39:44,880 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 19:39:44,933 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 19:39:44,933 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:39:44,996 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 19:39:44,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970974427] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:39:44,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [644360802] [2023-12-02 19:39:44,997 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 19:39:44,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:39:44,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-12-02 19:39:44,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711301961] [2023-12-02 19:39:44,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:39:44,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 19:39:44,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:39:44,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 19:39:44,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-12-02 19:39:44,999 INFO L87 Difference]: Start difference. First operand 28087 states and 80408 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 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 19:39:45,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:39:45,437 INFO L93 Difference]: Finished difference Result 26647 states and 76676 transitions. [2023-12-02 19:39:45,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 19:39:45,438 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 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 19:39:45,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:39:45,532 INFO L225 Difference]: With dead ends: 26647 [2023-12-02 19:39:45,532 INFO L226 Difference]: Without dead ends: 26647 [2023-12-02 19:39:45,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-12-02 19:39:45,533 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 208 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 19:39:45,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 236 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 19:39:45,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26647 states. [2023-12-02 19:39:46,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26647 to 26647. [2023-12-02 19:39:46,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26647 states, 25947 states have (on average 2.95510078236405) internal successors, (76676), 26646 states have internal predecessors, (76676), 0 states have call successors, (0), 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 19:39:46,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26647 states to 26647 states and 76676 transitions. [2023-12-02 19:39:46,405 INFO L78 Accepts]: Start accepts. Automaton has 26647 states and 76676 transitions. Word has length 7 [2023-12-02 19:39:46,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:39:46,406 INFO L495 AbstractCegarLoop]: Abstraction has 26647 states and 76676 transitions. [2023-12-02 19:39:46,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 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 19:39:46,406 INFO L276 IsEmpty]: Start isEmpty. Operand 26647 states and 76676 transitions. [2023-12-02 19:39:46,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 19:39:46,407 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:39:46,407 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:39:46,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2372e33-ef5a-4f14-a87c-42e5235e6a0f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 19:39:46,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2372e33-ef5a-4f14-a87c-42e5235e6a0f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:39:46,608 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-12-02 19:39:46,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:39:46,609 INFO L85 PathProgramCache]: Analyzing trace with hash -535436124, now seen corresponding path program 1 times [2023-12-02 19:39:46,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:39:46,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245001817] [2023-12-02 19:39:46,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:39:46,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:39:46,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:39:46,723 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 19:39:46,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:39:46,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245001817] [2023-12-02 19:39:46,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245001817] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:39:46,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:39:46,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 19:39:46,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235031910] [2023-12-02 19:39:46,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:39:46,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:39:46,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:39:46,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:39:46,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:39:46,726 INFO L87 Difference]: Start difference. First operand 26647 states and 76676 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 19:39:47,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:39:47,141 INFO L93 Difference]: Finished difference Result 22404 states and 62751 transitions. [2023-12-02 19:39:47,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:39:47,141 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2023-12-02 19:39:47,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:39:47,233 INFO L225 Difference]: With dead ends: 22404 [2023-12-02 19:39:47,233 INFO L226 Difference]: Without dead ends: 22404 [2023-12-02 19:39:47,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:39:47,234 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 187 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:39:47,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 90 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 19:39:47,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22404 states. [2023-12-02 19:39:48,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22404 to 21807. [2023-12-02 19:39:48,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21807 states, 21476 states have (on average 2.8820078226857886) internal successors, (61894), 21806 states have internal predecessors, (61894), 0 states have call successors, (0), 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 19:39:48,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21807 states to 21807 states and 61894 transitions. [2023-12-02 19:39:48,219 INFO L78 Accepts]: Start accepts. Automaton has 21807 states and 61894 transitions. Word has length 11 [2023-12-02 19:39:48,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:39:48,220 INFO L495 AbstractCegarLoop]: Abstraction has 21807 states and 61894 transitions. [2023-12-02 19:39:48,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 19:39:48,220 INFO L276 IsEmpty]: Start isEmpty. Operand 21807 states and 61894 transitions. [2023-12-02 19:39:48,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 19:39:48,221 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:39:48,221 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:39:48,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 19:39:48,222 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-12-02 19:39:48,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:39:48,222 INFO L85 PathProgramCache]: Analyzing trace with hash -535436123, now seen corresponding path program 1 times [2023-12-02 19:39:48,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:39:48,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732881186] [2023-12-02 19:39:48,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:39:48,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:39:48,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:39:48,330 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 19:39:48,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:39:48,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732881186] [2023-12-02 19:39:48,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732881186] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:39:48,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:39:48,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 19:39:48,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824925751] [2023-12-02 19:39:48,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:39:48,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:39:48,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:39:48,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:39:48,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:39:48,332 INFO L87 Difference]: Start difference. First operand 21807 states and 61894 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 19:39:48,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:39:48,541 INFO L93 Difference]: Finished difference Result 15453 states and 43162 transitions. [2023-12-02 19:39:48,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:39:48,542 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2023-12-02 19:39:48,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:39:48,590 INFO L225 Difference]: With dead ends: 15453 [2023-12-02 19:39:48,590 INFO L226 Difference]: Without dead ends: 15051 [2023-12-02 19:39:48,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:39:48,591 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 116 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:39:48,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 47 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:39:48,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15051 states. [2023-12-02 19:39:49,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15051 to 15051. [2023-12-02 19:39:49,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15051 states, 14977 states have (on average 2.7942845696734993) internal successors, (41850), 15050 states have internal predecessors, (41850), 0 states have call successors, (0), 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 19:39:49,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15051 states to 15051 states and 41850 transitions. [2023-12-02 19:39:49,062 INFO L78 Accepts]: Start accepts. Automaton has 15051 states and 41850 transitions. Word has length 11 [2023-12-02 19:39:49,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:39:49,063 INFO L495 AbstractCegarLoop]: Abstraction has 15051 states and 41850 transitions. [2023-12-02 19:39:49,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 19:39:49,063 INFO L276 IsEmpty]: Start isEmpty. Operand 15051 states and 41850 transitions. [2023-12-02 19:39:49,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 19:39:49,064 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:39:49,064 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2023-12-02 19:39:49,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 19:39:49,064 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-12-02 19:39:49,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:39:49,065 INFO L85 PathProgramCache]: Analyzing trace with hash -670485966, now seen corresponding path program 1 times [2023-12-02 19:39:49,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:39:49,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421003798] [2023-12-02 19:39:49,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:39:49,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:39:49,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 19:39:49,082 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 19:39:49,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 19:39:49,098 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 19:39:49,098 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 19:39:49,099 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (32 of 33 remaining) [2023-12-02 19:39:49,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 33 remaining) [2023-12-02 19:39:49,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 33 remaining) [2023-12-02 19:39:49,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 33 remaining) [2023-12-02 19:39:49,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 33 remaining) [2023-12-02 19:39:49,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 33 remaining) [2023-12-02 19:39:49,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 33 remaining) [2023-12-02 19:39:49,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (25 of 33 remaining) [2023-12-02 19:39:49,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (24 of 33 remaining) [2023-12-02 19:39:49,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 33 remaining) [2023-12-02 19:39:49,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 33 remaining) [2023-12-02 19:39:49,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 33 remaining) [2023-12-02 19:39:49,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 33 remaining) [2023-12-02 19:39:49,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 33 remaining) [2023-12-02 19:39:49,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 33 remaining) [2023-12-02 19:39:49,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 33 remaining) [2023-12-02 19:39:49,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 33 remaining) [2023-12-02 19:39:49,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 33 remaining) [2023-12-02 19:39:49,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 33 remaining) [2023-12-02 19:39:49,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 33 remaining) [2023-12-02 19:39:49,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 33 remaining) [2023-12-02 19:39:49,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 33 remaining) [2023-12-02 19:39:49,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 33 remaining) [2023-12-02 19:39:49,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 33 remaining) [2023-12-02 19:39:49,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 33 remaining) [2023-12-02 19:39:49,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 33 remaining) [2023-12-02 19:39:49,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 33 remaining) [2023-12-02 19:39:49,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 33 remaining) [2023-12-02 19:39:49,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 33 remaining) [2023-12-02 19:39:49,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 33 remaining) [2023-12-02 19:39:49,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 33 remaining) [2023-12-02 19:39:49,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 33 remaining) [2023-12-02 19:39:49,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 33 remaining) [2023-12-02 19:39:49,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 19:39:49,104 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-12-02 19:39:49,104 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-02 19:39:49,104 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-12-02 19:39:49,139 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-12-02 19:39:49,142 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 131 places, 149 transitions, 325 flow [2023-12-02 19:40:18,445 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 938462 states, 928905 states have (on average 4.5769954946953675) internal successors, (4251594), 938461 states have internal predecessors, (4251594), 0 states have call successors, (0), 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 19:40:18,447 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 19:40:18,447 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;@69705a12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 19:40:18,447 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2023-12-02 19:40:19,858 INFO L276 IsEmpty]: Start isEmpty. Operand has 938462 states, 928905 states have (on average 4.5769954946953675) internal successors, (4251594), 938461 states have internal predecessors, (4251594), 0 states have call successors, (0), 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 19:40:19,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 19:40:19,858 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:40:19,859 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 19:40:19,859 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-12-02 19:40:19,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:40:19,859 INFO L85 PathProgramCache]: Analyzing trace with hash 651001, now seen corresponding path program 1 times [2023-12-02 19:40:19,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:40:19,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538494906] [2023-12-02 19:40:19,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:40:19,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:40:19,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:40:19,896 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 19:40:19,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:40:19,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538494906] [2023-12-02 19:40:19,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538494906] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:40:19,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:40:19,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 19:40:19,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019726579] [2023-12-02 19:40:19,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:40:19,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:40:19,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:40:19,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:40:19,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:40:21,342 INFO L87 Difference]: Start difference. First operand has 938462 states, 928905 states have (on average 4.5769954946953675) internal successors, (4251594), 938461 states have internal predecessors, (4251594), 0 states have call successors, (0), 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 19:40:35,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:40:35,489 INFO L93 Difference]: Finished difference Result 852809 states and 3257206 transitions. [2023-12-02 19:40:35,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:40:35,489 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 19:40:35,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:40:42,567 INFO L225 Difference]: With dead ends: 852809 [2023-12-02 19:40:42,567 INFO L226 Difference]: Without dead ends: 852297 [2023-12-02 19:40:42,567 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 19:40:42,568 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 119 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:40:42,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 89 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 19:40:46,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852297 states. [2023-12-02 19:41:15,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852297 to 852297. [2023-12-02 19:41:17,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852297 states, 844568 states have (on average 3.8544557691032577) internal successors, (3255350), 852296 states have internal predecessors, (3255350), 0 states have call successors, (0), 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 19:41:24,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852297 states to 852297 states and 3255350 transitions. [2023-12-02 19:41:24,316 INFO L78 Accepts]: Start accepts. Automaton has 852297 states and 3255350 transitions. Word has length 3 [2023-12-02 19:41:24,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:41:24,316 INFO L495 AbstractCegarLoop]: Abstraction has 852297 states and 3255350 transitions. [2023-12-02 19:41:24,316 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 19:41:24,316 INFO L276 IsEmpty]: Start isEmpty. Operand 852297 states and 3255350 transitions. [2023-12-02 19:41:24,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 19:41:24,316 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:24,316 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 19:41:24,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 19:41:24,317 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-12-02 19:41:24,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:24,317 INFO L85 PathProgramCache]: Analyzing trace with hash 651002, now seen corresponding path program 1 times [2023-12-02 19:41:24,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:24,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869358727] [2023-12-02 19:41:24,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:24,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:24,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:24,368 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 19:41:24,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:41:24,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869358727] [2023-12-02 19:41:24,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869358727] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:41:24,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:41:24,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 19:41:24,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147534278] [2023-12-02 19:41:24,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:41:24,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:41:24,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:41:24,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:41:24,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:41:24,370 INFO L87 Difference]: Start difference. First operand 852297 states and 3255350 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)