./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b 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_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:00:22,408 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:00:22,476 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-06 21:00:22,482 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:00:22,482 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:00:22,515 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:00:22,516 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:00:22,516 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:00:22,517 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:00:22,517 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:00:22,518 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 21:00:22,519 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 21:00:22,519 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 21:00:22,523 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 21:00:22,524 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 21:00:22,525 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 21:00:22,526 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 21:00:22,530 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 21:00:22,530 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 21:00:22,531 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 21:00:22,533 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 21:00:22,533 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 21:00:22,534 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:00:22,534 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:00:22,535 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:00:22,535 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:00:22,536 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:00:22,536 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:00:22,536 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:00:22,537 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 21:00:22,538 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 21:00:22,538 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 21:00:22,538 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:00:22,539 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 21:00:22,539 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 21:00:22,539 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:00:22,539 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:00:22,539 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:00:22,540 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:00:22,540 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:00:22,540 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:00:22,540 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:00:22,541 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 21:00:22,541 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:00:22,542 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 21:00:22,542 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:00:22,542 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_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a [2023-11-06 21:00:22,847 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:00:22,880 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:00:22,883 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:00:22,884 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:00:22,886 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:00:22,887 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i [2023-11-06 21:00:25,972 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:00:26,363 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:00:26,364 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i [2023-11-06 21:00:26,384 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/data/cda7b6e3d/285d00205b9e4571810f22d8c9ecf85d/FLAGd8030e273 [2023-11-06 21:00:26,400 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/data/cda7b6e3d/285d00205b9e4571810f22d8c9ecf85d [2023-11-06 21:00:26,402 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:00:26,404 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:00:26,406 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:00:26,406 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:00:26,412 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:00:26,412 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:00:26" (1/1) ... [2023-11-06 21:00:26,414 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@740ae291 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:00:26, skipping insertion in model container [2023-11-06 21:00:26,414 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:00:26" (1/1) ... [2023-11-06 21:00:26,480 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:00:27,112 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:00:27,125 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:00:27,174 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:00:27,292 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:00:27,292 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:00:27 WrapperNode [2023-11-06 21:00:27,293 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:00:27,317 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:00:27,318 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:00:27,318 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:00:27,326 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:00:27" (1/1) ... [2023-11-06 21:00:27,347 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:00:27" (1/1) ... [2023-11-06 21:00:27,373 INFO L138 Inliner]: procedures = 364, calls = 21, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 64 [2023-11-06 21:00:27,374 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:00:27,375 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:00:27,375 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:00:27,375 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:00:27,384 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:00:27" (1/1) ... [2023-11-06 21:00:27,385 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:00:27" (1/1) ... [2023-11-06 21:00:27,389 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:00:27" (1/1) ... [2023-11-06 21:00:27,390 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:00:27" (1/1) ... [2023-11-06 21:00:27,397 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:00:27" (1/1) ... [2023-11-06 21:00:27,400 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:00:27" (1/1) ... [2023-11-06 21:00:27,403 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:00:27" (1/1) ... [2023-11-06 21:00:27,404 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:00:27" (1/1) ... [2023-11-06 21:00:27,408 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:00:27,409 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:00:27,409 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:00:27,409 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:00:27,410 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:00:27" (1/1) ... [2023-11-06 21:00:27,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:00:27,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:00:27,457 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:00:27,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:00:27,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 21:00:27,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:00:27,497 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 21:00:27,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 21:00:27,497 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-06 21:00:27,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:00:27,497 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2023-11-06 21:00:27,497 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2023-11-06 21:00:27,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:00:27,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:00:27,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:00:27,500 WARN L210 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 21:00:27,638 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:00:27,640 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:00:27,856 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:00:27,865 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:00:27,865 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 21:00:27,867 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:00:27 BoogieIcfgContainer [2023-11-06 21:00:27,867 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:00:27,870 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:00:27,870 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:00:27,873 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:00:27,873 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:00:26" (1/3) ... [2023-11-06 21:00:27,874 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@730406aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:00:27, skipping insertion in model container [2023-11-06 21:00:27,874 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:00:27" (2/3) ... [2023-11-06 21:00:27,874 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@730406aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:00:27, skipping insertion in model container [2023-11-06 21:00:27,874 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:00:27" (3/3) ... [2023-11-06 21:00:27,876 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2023-11-06 21:00:27,896 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:00:27,896 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-06 21:00:27,896 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 21:00:27,961 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-06 21:00:27,995 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-06 21:00:28,011 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 97 places, 101 transitions, 209 flow [2023-11-06 21:00:28,014 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 97 places, 101 transitions, 209 flow [2023-11-06 21:00:28,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 101 transitions, 209 flow [2023-11-06 21:00:28,078 INFO L124 PetriNetUnfolderBase]: 8/100 cut-off events. [2023-11-06 21:00:28,078 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 21:00:28,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 100 events. 8/100 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 118 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2023-11-06 21:00:28,086 INFO L119 LiptonReduction]: Number of co-enabled transitions 798 [2023-11-06 21:00:31,009 INFO L134 LiptonReduction]: Checked pairs total: 1058 [2023-11-06 21:00:31,009 INFO L136 LiptonReduction]: Total number of compositions: 104 [2023-11-06 21:00:31,018 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 22 transitions, 51 flow [2023-11-06 21:00:31,035 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 49 states, 43 states have (on average 2.116279069767442) internal successors, (91), 48 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:31,053 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:00:31,059 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;@420c4a23, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 21:00:31,059 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-06 21:00:31,062 INFO L276 IsEmpty]: Start isEmpty. Operand has 49 states, 43 states have (on average 2.116279069767442) internal successors, (91), 48 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:31,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2023-11-06 21:00:31,068 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:00:31,068 INFO L195 NwaCegarLoop]: trace histogram [1] [2023-11-06 21:00:31,069 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-06 21:00:31,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:00:31,074 INFO L85 PathProgramCache]: Analyzing trace with hash 390, now seen corresponding path program 1 times [2023-11-06 21:00:31,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:00:31,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304847393] [2023-11-06 21:00:31,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:00:31,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:00:31,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:00:31,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:00:31,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:00:31,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304847393] [2023-11-06 21:00:31,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304847393] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:00:31,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:00:31,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-06 21:00:31,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858034611] [2023-11-06 21:00:31,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:00:31,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 21:00:31,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:00:31,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 21:00:31,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 21:00:31,242 INFO L87 Difference]: Start difference. First operand has 49 states, 43 states have (on average 2.116279069767442) internal successors, (91), 48 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:31,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:00:31,281 INFO L93 Difference]: Finished difference Result 46 states and 88 transitions. [2023-11-06 21:00:31,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 21:00:31,284 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1 [2023-11-06 21:00:31,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:00:31,293 INFO L225 Difference]: With dead ends: 46 [2023-11-06 21:00:31,294 INFO L226 Difference]: Without dead ends: 46 [2023-11-06 21:00:31,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 21:00:31,298 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:00:31,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:00:31,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-06 21:00:31,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-11-06 21:00:31,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 43 states have (on average 2.046511627906977) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:31,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 88 transitions. [2023-11-06 21:00:31,337 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 88 transitions. Word has length 1 [2023-11-06 21:00:31,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:00:31,338 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 88 transitions. [2023-11-06 21:00:31,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:31,339 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 88 transitions. [2023-11-06 21:00:31,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-06 21:00:31,339 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:00:31,340 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-06 21:00:31,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:00:31,340 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-06 21:00:31,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:00:31,341 INFO L85 PathProgramCache]: Analyzing trace with hash 11937097, now seen corresponding path program 1 times [2023-11-06 21:00:31,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:00:31,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219585580] [2023-11-06 21:00:31,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:00:31,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:00:31,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:00:31,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:00:31,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:00:31,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219585580] [2023-11-06 21:00:31,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219585580] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:00:31,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:00:31,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:00:31,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444833370] [2023-11-06 21:00:31,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:00:31,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:00:31,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:00:31,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:00:31,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:00:31,487 INFO L87 Difference]: Start difference. First operand 46 states and 88 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:31,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:00:31,546 INFO L93 Difference]: Finished difference Result 64 states and 124 transitions. [2023-11-06 21:00:31,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:00:31,547 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2023-11-06 21:00:31,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:00:31,549 INFO L225 Difference]: With dead ends: 64 [2023-11-06 21:00:31,550 INFO L226 Difference]: Without dead ends: 64 [2023-11-06 21:00:31,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:00:31,552 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 8 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:00:31,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 2 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:00:31,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-06 21:00:31,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 52. [2023-11-06 21:00:31,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 51 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:31,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 100 transitions. [2023-11-06 21:00:31,581 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 100 transitions. Word has length 4 [2023-11-06 21:00:31,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:00:31,582 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 100 transitions. [2023-11-06 21:00:31,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:31,583 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 100 transitions. [2023-11-06 21:00:31,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-06 21:00:31,585 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:00:31,585 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:00:31,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 21:00:31,587 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-06 21:00:31,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:00:31,588 INFO L85 PathProgramCache]: Analyzing trace with hash -864540371, now seen corresponding path program 1 times [2023-11-06 21:00:31,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:00:31,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761119524] [2023-11-06 21:00:31,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:00:31,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:00:31,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:00:31,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:00:31,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:00:31,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761119524] [2023-11-06 21:00:31,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761119524] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:00:31,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537684136] [2023-11-06 21:00:31,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:00:31,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:00:31,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:00:31,748 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:00:31,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:00:31,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:00:31,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 21:00:31,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:00:31,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:00:31,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:00:31,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:00:31,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537684136] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:00:31,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [632021969] [2023-11-06 21:00:31,992 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) [2023-11-06 21:00:31,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:00:31,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 21:00:31,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104871846] [2023-11-06 21:00:31,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:00:31,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:00:31,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:00:31,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:00:31,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:00:31,997 INFO L87 Difference]: Start difference. First operand 52 states and 100 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:32,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:00:32,142 INFO L93 Difference]: Finished difference Result 106 states and 208 transitions. [2023-11-06 21:00:32,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:00:32,142 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2023-11-06 21:00:32,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:00:32,147 INFO L225 Difference]: With dead ends: 106 [2023-11-06 21:00:32,147 INFO L226 Difference]: Without dead ends: 106 [2023-11-06 21:00:32,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:00:32,151 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 40 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:00:32,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 5 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:00:32,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-11-06 21:00:32,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2023-11-06 21:00:32,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 103 states have (on average 2.0194174757281553) internal successors, (208), 105 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:32,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 208 transitions. [2023-11-06 21:00:32,184 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 208 transitions. Word has length 7 [2023-11-06 21:00:32,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:00:32,185 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 208 transitions. [2023-11-06 21:00:32,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:32,188 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 208 transitions. [2023-11-06 21:00:32,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-06 21:00:32,190 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:00:32,190 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1] [2023-11-06 21:00:32,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:00:32,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:00:32,406 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-06 21:00:32,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:00:32,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1366659145, now seen corresponding path program 2 times [2023-11-06 21:00:32,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:00:32,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488511733] [2023-11-06 21:00:32,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:00:32,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:00:32,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:00:32,616 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-06 21:00:32,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:00:32,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488511733] [2023-11-06 21:00:32,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488511733] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:00:32,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:00:32,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:00:32,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194717564] [2023-11-06 21:00:32,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:00:32,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:00:32,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:00:32,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:00:32,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:00:32,619 INFO L87 Difference]: Start difference. First operand 106 states and 208 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:32,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:00:32,641 INFO L93 Difference]: Finished difference Result 100 states and 196 transitions. [2023-11-06 21:00:32,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:00:32,642 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-06 21:00:32,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:00:32,643 INFO L225 Difference]: With dead ends: 100 [2023-11-06 21:00:32,643 INFO L226 Difference]: Without dead ends: 100 [2023-11-06 21:00:32,643 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 [2023-11-06 21:00:32,649 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 10 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:00:32,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 1 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:00:32,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-11-06 21:00:32,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-11-06 21:00:32,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 98 states have (on average 2.0) internal successors, (196), 99 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:32,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 196 transitions. [2023-11-06 21:00:32,658 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 196 transitions. Word has length 16 [2023-11-06 21:00:32,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:00:32,659 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 196 transitions. [2023-11-06 21:00:32,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:32,659 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 196 transitions. [2023-11-06 21:00:32,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-06 21:00:32,660 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:00:32,661 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1] [2023-11-06 21:00:32,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 21:00:32,661 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-06 21:00:32,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:00:32,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1366659146, now seen corresponding path program 1 times [2023-11-06 21:00:32,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:00:32,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56572819] [2023-11-06 21:00:32,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:00:32,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:00:32,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:00:32,879 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:00:32,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:00:32,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56572819] [2023-11-06 21:00:32,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56572819] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:00:32,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397674729] [2023-11-06 21:00:32,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:00:32,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:00:32,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:00:32,882 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:00:32,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:00:32,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:00:32,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:00:32,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:00:33,050 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:00:33,050 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:00:33,139 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:00:33,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397674729] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:00:33,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1054643084] [2023-11-06 21:00:33,141 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) [2023-11-06 21:00:33,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:00:33,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-06 21:00:33,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604613012] [2023-11-06 21:00:33,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:00:33,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 21:00:33,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:00:33,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 21:00:33,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-06 21:00:33,149 INFO L87 Difference]: Start difference. First operand 100 states and 196 transitions. Second operand has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:33,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:00:33,340 INFO L93 Difference]: Finished difference Result 208 states and 412 transitions. [2023-11-06 21:00:33,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 21:00:33,341 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-06 21:00:33,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:00:33,344 INFO L225 Difference]: With dead ends: 208 [2023-11-06 21:00:33,344 INFO L226 Difference]: Without dead ends: 208 [2023-11-06 21:00:33,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-06 21:00:33,346 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 124 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:00:33,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 10 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:00:33,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2023-11-06 21:00:33,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2023-11-06 21:00:33,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 206 states have (on average 2.0) internal successors, (412), 207 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:33,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 412 transitions. [2023-11-06 21:00:33,371 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 412 transitions. Word has length 16 [2023-11-06 21:00:33,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:00:33,372 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 412 transitions. [2023-11-06 21:00:33,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:33,374 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 412 transitions. [2023-11-06 21:00:33,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-06 21:00:33,383 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:00:33,383 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1] [2023-11-06 21:00:33,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:00:33,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:00:33,590 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-06 21:00:33,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:00:33,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1990672182, now seen corresponding path program 2 times [2023-11-06 21:00:33,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:00:33,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665982667] [2023-11-06 21:00:33,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:00:33,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:00:33,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:00:33,905 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:00:33,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:00:33,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665982667] [2023-11-06 21:00:33,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665982667] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:00:33,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366015271] [2023-11-06 21:00:33,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:00:33,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:00:33,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:00:33,908 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:00:33,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:00:34,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-06 21:00:34,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:00:34,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 21:00:34,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:00:34,064 INFO L351 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 [2023-11-06 21:00:34,319 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-06 21:00:34,319 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:00:34,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366015271] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:00:34,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:00:34,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [12] total 13 [2023-11-06 21:00:34,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715545532] [2023-11-06 21:00:34,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:00:34,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:00:34,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:00:34,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:00:34,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2023-11-06 21:00:34,322 INFO L87 Difference]: Start difference. First operand 208 states and 412 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:34,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:00:34,347 INFO L93 Difference]: Finished difference Result 202 states and 400 transitions. [2023-11-06 21:00:34,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:00:34,347 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-11-06 21:00:34,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:00:34,349 INFO L225 Difference]: With dead ends: 202 [2023-11-06 21:00:34,350 INFO L226 Difference]: Without dead ends: 202 [2023-11-06 21:00:34,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2023-11-06 21:00:34,352 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 9 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:00:34,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:00:34,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2023-11-06 21:00:34,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2023-11-06 21:00:34,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.9900497512437811) internal successors, (400), 201 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:34,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 400 transitions. [2023-11-06 21:00:34,378 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 400 transitions. Word has length 34 [2023-11-06 21:00:34,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:00:34,379 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 400 transitions. [2023-11-06 21:00:34,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:34,379 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 400 transitions. [2023-11-06 21:00:34,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-06 21:00:34,380 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:00:34,381 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:00:34,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:00:34,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:00:34,581 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-06 21:00:34,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:00:34,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1090549966, now seen corresponding path program 1 times [2023-11-06 21:00:34,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:00:34,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498318483] [2023-11-06 21:00:34,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:00:34,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:00:34,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:00:34,690 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-06 21:00:34,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:00:34,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498318483] [2023-11-06 21:00:34,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498318483] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:00:34,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:00:34,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:00:34,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672952477] [2023-11-06 21:00:34,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:00:34,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:00:34,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:00:34,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:00:34,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:00:34,693 INFO L87 Difference]: Start difference. First operand 202 states and 400 transitions. Second operand has 3 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) [2023-11-06 21:00:34,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:00:34,726 INFO L93 Difference]: Finished difference Result 334 states and 664 transitions. [2023-11-06 21:00:34,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:00:34,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 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 38 [2023-11-06 21:00:34,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:00:34,729 INFO L225 Difference]: With dead ends: 334 [2023-11-06 21:00:34,730 INFO L226 Difference]: Without dead ends: 334 [2023-11-06 21:00:34,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:00:34,731 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:00:34,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 3 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:00:34,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2023-11-06 21:00:34,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 235. [2023-11-06 21:00:34,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.9914529914529915) internal successors, (466), 234 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:34,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 466 transitions. [2023-11-06 21:00:34,750 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 466 transitions. Word has length 38 [2023-11-06 21:00:34,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:00:34,751 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 466 transitions. [2023-11-06 21:00:34,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2023-11-06 21:00:34,751 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 466 transitions. [2023-11-06 21:00:34,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-06 21:00:34,757 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:00:34,758 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:00:34,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 21:00:34,758 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-06 21:00:34,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:00:34,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1442318505, now seen corresponding path program 1 times [2023-11-06 21:00:34,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:00:34,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878441944] [2023-11-06 21:00:34,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:00:34,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:00:34,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:00:34,930 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-06 21:00:34,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:00:34,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878441944] [2023-11-06 21:00:34,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878441944] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:00:34,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006223178] [2023-11-06 21:00:34,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:00:34,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:00:34,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:00:34,933 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:00:34,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:00:35,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:00:35,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 21:00:35,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:00:35,266 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:00:35,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:00:35,545 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:00:35,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006223178] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:00:35,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [370323505] [2023-11-06 21:00:35,546 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) [2023-11-06 21:00:35,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:00:35,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 13, 13] total 24 [2023-11-06 21:00:35,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931732795] [2023-11-06 21:00:35,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:00:35,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 21:00:35,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:00:35,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 21:00:35,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2023-11-06 21:00:35,551 INFO L87 Difference]: Start difference. First operand 235 states and 466 transitions. Second operand has 24 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 24 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:36,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:00:36,740 INFO L93 Difference]: Finished difference Result 886 states and 1768 transitions. [2023-11-06 21:00:36,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-06 21:00:36,741 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 24 states have internal predecessors, (82), 0 states have call successors, (0), 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 42 [2023-11-06 21:00:36,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:00:36,747 INFO L225 Difference]: With dead ends: 886 [2023-11-06 21:00:36,747 INFO L226 Difference]: Without dead ends: 886 [2023-11-06 21:00:36,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1386, Invalid=2646, Unknown=0, NotChecked=0, Total=4032 [2023-11-06 21:00:36,750 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 922 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:00:36,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [922 Valid, 42 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:00:36,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2023-11-06 21:00:36,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 697. [2023-11-06 21:00:36,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 1.9971264367816093) internal successors, (1390), 696 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:36,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1390 transitions. [2023-11-06 21:00:36,777 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1390 transitions. Word has length 42 [2023-11-06 21:00:36,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:00:36,778 INFO L495 AbstractCegarLoop]: Abstraction has 697 states and 1390 transitions. [2023-11-06 21:00:36,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 24 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:36,778 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1390 transitions. [2023-11-06 21:00:36,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-06 21:00:36,780 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:00:36,780 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:00:36,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 21:00:36,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:00:36,987 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-06 21:00:36,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:00:36,987 INFO L85 PathProgramCache]: Analyzing trace with hash -332388064, now seen corresponding path program 2 times [2023-11-06 21:00:36,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:00:36,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889618570] [2023-11-06 21:00:36,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:00:36,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:00:37,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:00:37,221 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2023-11-06 21:00:37,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:00:37,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889618570] [2023-11-06 21:00:37,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889618570] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:00:37,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405863676] [2023-11-06 21:00:37,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:00:37,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:00:37,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:00:37,223 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:00:37,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 21:00:37,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 21:00:37,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:00:37,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 21:00:37,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:00:37,472 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2023-11-06 21:00:37,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:00:37,585 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2023-11-06 21:00:37,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405863676] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:00:37,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1804900279] [2023-11-06 21:00:37,585 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) [2023-11-06 21:00:37,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:00:37,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-06 21:00:37,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013254514] [2023-11-06 21:00:37,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:00:37,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 21:00:37,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:00:37,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 21:00:37,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-11-06 21:00:37,588 INFO L87 Difference]: Start difference. First operand 697 states and 1390 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:37,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:00:37,705 INFO L93 Difference]: Finished difference Result 1705 states and 3406 transitions. [2023-11-06 21:00:37,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 21:00:37,705 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 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 76 [2023-11-06 21:00:37,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:00:37,717 INFO L225 Difference]: With dead ends: 1705 [2023-11-06 21:00:37,717 INFO L226 Difference]: Without dead ends: 1705 [2023-11-06 21:00:37,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-11-06 21:00:37,718 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 26 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:00:37,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 12 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:00:37,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2023-11-06 21:00:37,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1705. [2023-11-06 21:00:37,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1704 states have (on average 1.9988262910798122) internal successors, (3406), 1704 states have internal predecessors, (3406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:37,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 3406 transitions. [2023-11-06 21:00:37,810 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 3406 transitions. Word has length 76 [2023-11-06 21:00:37,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:00:37,811 INFO L495 AbstractCegarLoop]: Abstraction has 1705 states and 3406 transitions. [2023-11-06 21:00:37,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:37,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 3406 transitions. [2023-11-06 21:00:37,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-06 21:00:37,817 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:00:37,818 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:00:37,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 21:00:38,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:00:38,026 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-06 21:00:38,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:00:38,026 INFO L85 PathProgramCache]: Analyzing trace with hash -335170492, now seen corresponding path program 3 times [2023-11-06 21:00:38,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:00:38,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364499278] [2023-11-06 21:00:38,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:00:38,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:00:38,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:00:38,422 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2023-11-06 21:00:38,423 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:00:38,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364499278] [2023-11-06 21:00:38,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364499278] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:00:38,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085557926] [2023-11-06 21:00:38,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:00:38,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:00:38,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:00:38,425 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:00:38,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 21:00:39,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:00:39,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:00:39,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 21:00:39,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:00:39,324 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2023-11-06 21:00:39,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:00:39,567 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2023-11-06 21:00:39,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085557926] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:00:39,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1342284114] [2023-11-06 21:00:39,567 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) [2023-11-06 21:00:39,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:00:39,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-11-06 21:00:39,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724085190] [2023-11-06 21:00:39,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:00:39,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 21:00:39,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:00:39,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 21:00:39,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-11-06 21:00:39,574 INFO L87 Difference]: Start difference. First operand 1705 states and 3406 transitions. Second operand has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:39,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:00:39,793 INFO L93 Difference]: Finished difference Result 3721 states and 7438 transitions. [2023-11-06 21:00:39,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 21:00:39,793 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 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 92 [2023-11-06 21:00:39,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:00:39,816 INFO L225 Difference]: With dead ends: 3721 [2023-11-06 21:00:39,817 INFO L226 Difference]: Without dead ends: 3721 [2023-11-06 21:00:39,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-11-06 21:00:39,818 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 96 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:00:39,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 22 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:00:39,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3721 states. [2023-11-06 21:00:39,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3721 to 3721. [2023-11-06 21:00:39,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3721 states, 3720 states have (on average 1.999462365591398) internal successors, (7438), 3720 states have internal predecessors, (7438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:39,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3721 states to 3721 states and 7438 transitions. [2023-11-06 21:00:39,932 INFO L78 Accepts]: Start accepts. Automaton has 3721 states and 7438 transitions. Word has length 92 [2023-11-06 21:00:39,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:00:39,933 INFO L495 AbstractCegarLoop]: Abstraction has 3721 states and 7438 transitions. [2023-11-06 21:00:39,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:39,933 INFO L276 IsEmpty]: Start isEmpty. Operand 3721 states and 7438 transitions. [2023-11-06 21:00:39,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-06 21:00:39,943 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:00:39,944 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:00:39,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 21:00:40,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 21:00:40,151 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-06 21:00:40,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:00:40,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1988653708, now seen corresponding path program 4 times [2023-11-06 21:00:40,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:00:40,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693158511] [2023-11-06 21:00:40,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:00:40,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:00:40,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:00:40,895 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2023-11-06 21:00:40,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:00:40,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693158511] [2023-11-06 21:00:40,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693158511] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:00:40,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143078] [2023-11-06 21:00:40,896 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 21:00:40,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:00:40,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:00:40,897 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:00:40,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 21:00:41,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:00:41,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 21:00:41,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:00:41,369 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2023-11-06 21:00:41,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:00:41,799 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2023-11-06 21:00:41,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143078] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:00:41,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [834176803] [2023-11-06 21:00:41,800 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) [2023-11-06 21:00:41,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:00:41,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2023-11-06 21:00:41,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390220471] [2023-11-06 21:00:41,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:00:41,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 21:00:41,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:00:41,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 21:00:41,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2023-11-06 21:00:41,804 INFO L87 Difference]: Start difference. First operand 3721 states and 7438 transitions. Second operand has 23 states, 23 states have (on average 4.521739130434782) internal successors, (104), 23 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:42,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:00:42,101 INFO L93 Difference]: Finished difference Result 5233 states and 10462 transitions. [2023-11-06 21:00:42,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 21:00:42,101 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.521739130434782) internal successors, (104), 23 states have internal predecessors, (104), 0 states have call successors, (0), 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 124 [2023-11-06 21:00:42,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:00:42,134 INFO L225 Difference]: With dead ends: 5233 [2023-11-06 21:00:42,135 INFO L226 Difference]: Without dead ends: 5233 [2023-11-06 21:00:42,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 232 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2023-11-06 21:00:42,136 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 168 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:00:42,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 29 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:00:42,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5233 states. [2023-11-06 21:00:42,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5233 to 5233. [2023-11-06 21:00:42,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5233 states, 5232 states have (on average 1.9996177370030581) internal successors, (10462), 5232 states have internal predecessors, (10462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:42,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5233 states to 5233 states and 10462 transitions. [2023-11-06 21:00:42,297 INFO L78 Accepts]: Start accepts. Automaton has 5233 states and 10462 transitions. Word has length 124 [2023-11-06 21:00:42,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:00:42,298 INFO L495 AbstractCegarLoop]: Abstraction has 5233 states and 10462 transitions. [2023-11-06 21:00:42,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.521739130434782) internal successors, (104), 23 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:42,298 INFO L276 IsEmpty]: Start isEmpty. Operand 5233 states and 10462 transitions. [2023-11-06 21:00:42,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-11-06 21:00:42,311 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:00:42,311 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:00:42,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 21:00:42,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 21:00:42,518 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-06 21:00:42,519 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:00:42,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1367460798, now seen corresponding path program 5 times [2023-11-06 21:00:42,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:00:42,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158185211] [2023-11-06 21:00:42,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:00:42,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:00:42,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:00:48,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:00:48,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:00:48,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158185211] [2023-11-06 21:00:48,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158185211] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:00:48,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600092448] [2023-11-06 21:00:48,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:00:48,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:00:48,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:00:48,422 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:00:48,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4dd4cac-9c32-4f6f-849c-fb47ed175152/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 21:00:49,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2023-11-06 21:00:49,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:00:49,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 817 conjuncts, 168 conjunts are in the unsatisfiable core [2023-11-06 21:00:49,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:00:49,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:00:49,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:00:49,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:00:49,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600092448] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:00:49,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2116294245] [2023-11-06 21:00:49,923 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) [2023-11-06 21:00:49,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:00:49,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2023-11-06 21:00:49,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897687049] [2023-11-06 21:00:49,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:00:49,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-11-06 21:00:49,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:00:49,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-11-06 21:00:49,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2023-11-06 21:00:49,930 INFO L87 Difference]: Start difference. First operand 5233 states and 10462 transitions. Second operand has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)