./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/bench-exp2x9.wvr.c --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_a49164d6-ae21-4627-af1f-421666a9abd5/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49164d6-ae21-4627-af1f-421666a9abd5/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_a49164d6-ae21-4627-af1f-421666a9abd5/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49164d6-ae21-4627-af1f-421666a9abd5/bin/utaipan-verify-FOvIYxoinp/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/bench-exp2x9.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49164d6-ae21-4627-af1f-421666a9abd5/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_a49164d6-ae21-4627-af1f-421666a9abd5/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 d6a1dd92aa2998cfb1326128fd549d301e029b328accb048c4d2ec692e416e63 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 20:28:39,200 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 20:28:39,318 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49164d6-ae21-4627-af1f-421666a9abd5/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-06 20:28:39,327 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 20:28:39,328 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 20:28:39,366 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 20:28:39,367 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 20:28:39,368 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 20:28:39,369 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 20:28:39,374 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 20:28:39,374 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 20:28:39,376 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 20:28:39,376 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 20:28:39,378 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 20:28:39,379 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 20:28:39,379 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 20:28:39,380 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 20:28:39,382 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 20:28:39,382 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 20:28:39,383 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 20:28:39,383 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 20:28:39,384 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 20:28:39,385 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 20:28:39,385 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 20:28:39,386 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 20:28:39,387 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 20:28:39,387 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 20:28:39,388 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 20:28:39,388 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 20:28:39,388 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 20:28:39,390 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 20:28:39,390 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 20:28:39,391 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 20:28:39,391 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 20:28:39,391 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 20:28:39,392 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 20:28:39,392 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 20:28:39,392 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 20:28:39,393 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 20:28:39,393 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:28:39,393 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 20:28:39,394 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 20:28:39,394 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 20:28:39,394 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 20:28:39,395 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 20:28:39,395 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 20:28:39,396 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_a49164d6-ae21-4627-af1f-421666a9abd5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49164d6-ae21-4627-af1f-421666a9abd5/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6a1dd92aa2998cfb1326128fd549d301e029b328accb048c4d2ec692e416e63 [2023-11-06 20:28:39,671 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 20:28:39,693 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 20:28:39,696 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 20:28:39,697 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 20:28:39,698 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 20:28:39,699 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49164d6-ae21-4627-af1f-421666a9abd5/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/weaver/bench-exp2x9.wvr.c [2023-11-06 20:28:42,777 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 20:28:43,059 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 20:28:43,060 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49164d6-ae21-4627-af1f-421666a9abd5/sv-benchmarks/c/weaver/bench-exp2x9.wvr.c [2023-11-06 20:28:43,068 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49164d6-ae21-4627-af1f-421666a9abd5/bin/utaipan-verify-FOvIYxoinp/data/85b02a2a8/56e962364e3e4bfdaa5ad2d0b94a0a4f/FLAG2b4fb247f [2023-11-06 20:28:43,083 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49164d6-ae21-4627-af1f-421666a9abd5/bin/utaipan-verify-FOvIYxoinp/data/85b02a2a8/56e962364e3e4bfdaa5ad2d0b94a0a4f [2023-11-06 20:28:43,086 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 20:28:43,087 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 20:28:43,089 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 20:28:43,089 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 20:28:43,095 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 20:28:43,095 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:28:43" (1/1) ... [2023-11-06 20:28:43,097 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3930a814 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:28:43, skipping insertion in model container [2023-11-06 20:28:43,097 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:28:43" (1/1) ... [2023-11-06 20:28:43,122 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 20:28:43,362 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:28:43,373 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 20:28:43,400 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:28:43,421 INFO L206 MainTranslator]: Completed translation [2023-11-06 20:28:43,422 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:28:43 WrapperNode [2023-11-06 20:28:43,422 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 20:28:43,423 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 20:28:43,423 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 20:28:43,424 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 20:28:43,430 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:28:43" (1/1) ... [2023-11-06 20:28:43,438 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:28:43" (1/1) ... [2023-11-06 20:28:43,461 INFO L138 Inliner]: procedures = 20, calls = 33, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 97 [2023-11-06 20:28:43,461 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 20:28:43,462 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 20:28:43,462 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 20:28:43,463 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 20:28:43,470 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:28:43" (1/1) ... [2023-11-06 20:28:43,471 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:28:43" (1/1) ... [2023-11-06 20:28:43,475 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:28:43" (1/1) ... [2023-11-06 20:28:43,475 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:28:43" (1/1) ... [2023-11-06 20:28:43,491 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:28:43" (1/1) ... [2023-11-06 20:28:43,510 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:28:43" (1/1) ... [2023-11-06 20:28:43,512 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:28:43" (1/1) ... [2023-11-06 20:28:43,513 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:28:43" (1/1) ... [2023-11-06 20:28:43,516 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 20:28:43,529 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 20:28:43,530 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 20:28:43,530 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 20:28:43,531 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:28:43" (1/1) ... [2023-11-06 20:28:43,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:28:43,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49164d6-ae21-4627-af1f-421666a9abd5/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:28:43,569 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49164d6-ae21-4627-af1f-421666a9abd5/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 20:28:43,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49164d6-ae21-4627-af1f-421666a9abd5/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 20:28:43,611 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 20:28:43,611 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 20:28:43,611 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 20:28:43,612 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 20:28:43,612 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 20:28:43,612 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 20:28:43,612 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 20:28:43,612 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-06 20:28:43,615 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-06 20:28:43,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 20:28:43,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 20:28:43,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 20:28:43,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 20:28:43,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 20:28:43,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 20:28:43,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 20:28:43,619 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 20:28:43,767 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 20:28:43,771 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 20:28:44,167 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 20:28:44,177 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 20:28:44,178 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-06 20:28:44,180 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:28:44 BoogieIcfgContainer [2023-11-06 20:28:44,180 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 20:28:44,183 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 20:28:44,183 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 20:28:44,186 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 20:28:44,187 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 08:28:43" (1/3) ... [2023-11-06 20:28:44,187 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3005a2e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:28:44, skipping insertion in model container [2023-11-06 20:28:44,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:28:43" (2/3) ... [2023-11-06 20:28:44,188 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3005a2e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:28:44, skipping insertion in model container [2023-11-06 20:28:44,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:28:44" (3/3) ... [2023-11-06 20:28:44,190 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp2x9.wvr.c [2023-11-06 20:28:44,206 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 20:28:44,207 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-11-06 20:28:44,207 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 20:28:44,387 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-06 20:28:44,433 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-06 20:28:44,449 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 176 places, 173 transitions, 374 flow [2023-11-06 20:28:44,452 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 176 places, 173 transitions, 374 flow [2023-11-06 20:28:44,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 173 transitions, 374 flow [2023-11-06 20:28:44,537 INFO L124 PetriNetUnfolderBase]: 10/169 cut-off events. [2023-11-06 20:28:44,537 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 20:28:44,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 169 events. 10/169 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 190 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 112. Up to 2 conditions per place. [2023-11-06 20:28:44,558 INFO L119 LiptonReduction]: Number of co-enabled transitions 4080 [2023-11-06 20:28:51,176 INFO L134 LiptonReduction]: Checked pairs total: 4246 [2023-11-06 20:28:51,176 INFO L136 LiptonReduction]: Total number of compositions: 174 [2023-11-06 20:28:51,186 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 56 places, 47 transitions, 122 flow [2023-11-06 20:28:51,243 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 183 states, 165 states have (on average 4.212121212121212) internal successors, (695), 182 states have internal predecessors, (695), 0 states have call successors, (0), 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 20:28:51,271 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 20:28:51,279 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;@68b354d7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 20:28:51,279 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-11-06 20:28:51,284 INFO L276 IsEmpty]: Start isEmpty. Operand has 183 states, 165 states have (on average 4.212121212121212) internal successors, (695), 182 states have internal predecessors, (695), 0 states have call successors, (0), 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 20:28:51,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2023-11-06 20:28:51,289 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:28:51,290 INFO L195 NwaCegarLoop]: trace histogram [1] [2023-11-06 20:28:51,290 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 20:28:51,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:28:51,301 INFO L85 PathProgramCache]: Analyzing trace with hash 643, now seen corresponding path program 1 times [2023-11-06 20:28:51,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:28:51,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971025050] [2023-11-06 20:28:51,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:28:51,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:28:51,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:28:51,422 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 20:28:51,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:28:51,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971025050] [2023-11-06 20:28:51,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971025050] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:28:51,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:28:51,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-06 20:28:51,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055581895] [2023-11-06 20:28:51,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:28:51,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 20:28:51,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:28:51,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 20:28:51,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 20:28:51,455 INFO L87 Difference]: Start difference. First operand has 183 states, 165 states have (on average 4.212121212121212) internal successors, (695), 182 states have internal predecessors, (695), 0 states have call successors, (0), 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 20:28:51,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:28:51,562 INFO L93 Difference]: Finished difference Result 180 states and 692 transitions. [2023-11-06 20:28:51,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 20:28:51,564 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 20:28:51,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:28:51,580 INFO L225 Difference]: With dead ends: 180 [2023-11-06 20:28:51,580 INFO L226 Difference]: Without dead ends: 180 [2023-11-06 20:28:51,581 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 20:28:51,586 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:28:51,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:28:51,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-11-06 20:28:51,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2023-11-06 20:28:51,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 165 states have (on average 4.193939393939394) internal successors, (692), 179 states have internal predecessors, (692), 0 states have call successors, (0), 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 20:28:51,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 692 transitions. [2023-11-06 20:28:51,672 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 692 transitions. Word has length 1 [2023-11-06 20:28:51,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:28:51,673 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 692 transitions. [2023-11-06 20:28:51,673 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 20:28:51,674 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 692 transitions. [2023-11-06 20:28:51,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-06 20:28:51,675 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:28:51,675 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-06 20:28:51,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 20:28:51,680 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 20:28:51,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:28:51,681 INFO L85 PathProgramCache]: Analyzing trace with hash 632912, now seen corresponding path program 1 times [2023-11-06 20:28:51,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:28:51,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632761422] [2023-11-06 20:28:51,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:28:51,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:28:51,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:28:52,069 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 20:28:52,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:28:52,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632761422] [2023-11-06 20:28:52,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632761422] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:28:52,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:28:52,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:28:52,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298954569] [2023-11-06 20:28:52,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:28:52,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:28:52,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:28:52,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:28:52,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:28:52,075 INFO L87 Difference]: Start difference. First operand 180 states and 692 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:28:52,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:28:52,152 INFO L93 Difference]: Finished difference Result 170 states and 656 transitions. [2023-11-06 20:28:52,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:28:52,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-06 20:28:52,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:28:52,160 INFO L225 Difference]: With dead ends: 170 [2023-11-06 20:28:52,160 INFO L226 Difference]: Without dead ends: 170 [2023-11-06 20:28:52,160 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 20:28:52,162 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 35 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:28:52,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 0 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:28:52,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-11-06 20:28:52,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2023-11-06 20:28:52,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 157 states have (on average 4.178343949044586) internal successors, (656), 169 states have internal predecessors, (656), 0 states have call successors, (0), 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 20:28:52,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 656 transitions. [2023-11-06 20:28:52,180 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 656 transitions. Word has length 3 [2023-11-06 20:28:52,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:28:52,181 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 656 transitions. [2023-11-06 20:28:52,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:28:52,182 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 656 transitions. [2023-11-06 20:28:52,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-06 20:28:52,182 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:28:52,182 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-06 20:28:52,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 20:28:52,183 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 20:28:52,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:28:52,183 INFO L85 PathProgramCache]: Analyzing trace with hash 632913, now seen corresponding path program 1 times [2023-11-06 20:28:52,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:28:52,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322792467] [2023-11-06 20:28:52,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:28:52,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:28:52,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:28:52,405 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 20:28:52,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:28:52,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322792467] [2023-11-06 20:28:52,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322792467] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:28:52,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:28:52,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:28:52,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036981343] [2023-11-06 20:28:52,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:28:52,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:28:52,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:28:52,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:28:52,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:28:52,414 INFO L87 Difference]: Start difference. First operand 170 states and 656 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:28:52,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:28:52,487 INFO L93 Difference]: Finished difference Result 160 states and 620 transitions. [2023-11-06 20:28:52,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:28:52,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-06 20:28:52,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:28:52,490 INFO L225 Difference]: With dead ends: 160 [2023-11-06 20:28:52,491 INFO L226 Difference]: Without dead ends: 160 [2023-11-06 20:28:52,491 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 20:28:52,492 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:28:52,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 0 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:28:52,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-11-06 20:28:52,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2023-11-06 20:28:52,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 149 states have (on average 4.1610738255033555) internal successors, (620), 159 states have internal predecessors, (620), 0 states have call successors, (0), 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 20:28:52,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 620 transitions. [2023-11-06 20:28:52,510 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 620 transitions. Word has length 3 [2023-11-06 20:28:52,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:28:52,515 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 620 transitions. [2023-11-06 20:28:52,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:28:52,516 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 620 transitions. [2023-11-06 20:28:52,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-06 20:28:52,516 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:28:52,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 20:28:52,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 20:28:52,518 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 20:28:52,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:28:52,518 INFO L85 PathProgramCache]: Analyzing trace with hash 608241378, now seen corresponding path program 1 times [2023-11-06 20:28:52,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:28:52,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219264845] [2023-11-06 20:28:52,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:28:52,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:28:52,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:28:52,620 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 20:28:52,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:28:52,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219264845] [2023-11-06 20:28:52,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219264845] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:28:52,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:28:52,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:28:52,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644848427] [2023-11-06 20:28:52,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:28:52,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:28:52,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:28:52,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:28:52,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:28:52,631 INFO L87 Difference]: Start difference. First operand 160 states and 620 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 20:28:52,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:28:52,701 INFO L93 Difference]: Finished difference Result 152 states and 596 transitions. [2023-11-06 20:28:52,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:28:52,701 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2023-11-06 20:28:52,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:28:52,704 INFO L225 Difference]: With dead ends: 152 [2023-11-06 20:28:52,704 INFO L226 Difference]: Without dead ends: 152 [2023-11-06 20:28:52,704 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 20:28:52,705 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:28:52,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 0 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:28:52,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-11-06 20:28:52,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2023-11-06 20:28:52,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 143 states have (on average 4.1678321678321675) internal successors, (596), 151 states have internal predecessors, (596), 0 states have call successors, (0), 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 20:28:52,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 596 transitions. [2023-11-06 20:28:52,717 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 596 transitions. Word has length 5 [2023-11-06 20:28:52,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:28:52,717 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 596 transitions. [2023-11-06 20:28:52,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 20:28:52,718 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 596 transitions. [2023-11-06 20:28:52,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-06 20:28:52,718 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:28:52,719 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 20:28:52,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 20:28:52,719 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 20:28:52,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:28:52,720 INFO L85 PathProgramCache]: Analyzing trace with hash 608241379, now seen corresponding path program 1 times [2023-11-06 20:28:52,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:28:52,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990556294] [2023-11-06 20:28:52,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:28:52,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:28:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:28:52,822 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 20:28:52,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:28:52,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990556294] [2023-11-06 20:28:52,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990556294] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:28:52,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:28:52,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:28:52,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453057587] [2023-11-06 20:28:52,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:28:52,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:28:52,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:28:52,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:28:52,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:28:52,825 INFO L87 Difference]: Start difference. First operand 152 states and 596 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 20:28:52,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:28:52,896 INFO L93 Difference]: Finished difference Result 144 states and 572 transitions. [2023-11-06 20:28:52,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:28:52,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2023-11-06 20:28:52,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:28:52,899 INFO L225 Difference]: With dead ends: 144 [2023-11-06 20:28:52,900 INFO L226 Difference]: Without dead ends: 144 [2023-11-06 20:28:52,900 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 20:28:52,902 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:28:52,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 0 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:28:52,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-11-06 20:28:52,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2023-11-06 20:28:52,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 137 states have (on average 4.175182481751825) internal successors, (572), 143 states have internal predecessors, (572), 0 states have call successors, (0), 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 20:28:52,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 572 transitions. [2023-11-06 20:28:52,928 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 572 transitions. Word has length 5 [2023-11-06 20:28:52,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:28:52,929 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 572 transitions. [2023-11-06 20:28:52,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 20:28:52,929 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 572 transitions. [2023-11-06 20:28:52,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-06 20:28:52,930 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:28:52,930 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:28:52,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 20:28:52,934 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 20:28:52,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:28:52,936 INFO L85 PathProgramCache]: Analyzing trace with hash 404428028, now seen corresponding path program 1 times [2023-11-06 20:28:52,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:28:52,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972173392] [2023-11-06 20:28:52,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:28:52,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:28:52,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:28:53,055 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 20:28:53,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:28:53,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972173392] [2023-11-06 20:28:53,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972173392] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:28:53,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:28:53,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:28:53,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059366018] [2023-11-06 20:28:53,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:28:53,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:28:53,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:28:53,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:28:53,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:28:53,059 INFO L87 Difference]: Start difference. First operand 144 states and 572 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 20:28:53,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:28:53,119 INFO L93 Difference]: Finished difference Result 134 states and 536 transitions. [2023-11-06 20:28:53,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:28:53,119 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 7 [2023-11-06 20:28:53,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:28:53,122 INFO L225 Difference]: With dead ends: 134 [2023-11-06 20:28:53,122 INFO L226 Difference]: Without dead ends: 134 [2023-11-06 20:28:53,122 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 20:28:53,127 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:28:53,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 0 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:28:53,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-11-06 20:28:53,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2023-11-06 20:28:53,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 4.155038759689923) internal successors, (536), 133 states have internal predecessors, (536), 0 states have call successors, (0), 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 20:28:53,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 536 transitions. [2023-11-06 20:28:53,138 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 536 transitions. Word has length 7 [2023-11-06 20:28:53,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:28:53,138 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 536 transitions. [2023-11-06 20:28:53,139 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 20:28:53,139 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 536 transitions. [2023-11-06 20:28:53,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-06 20:28:53,140 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:28:53,140 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:28:53,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 20:28:53,141 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 20:28:53,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:28:53,142 INFO L85 PathProgramCache]: Analyzing trace with hash 404428029, now seen corresponding path program 1 times [2023-11-06 20:28:53,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:28:53,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206810393] [2023-11-06 20:28:53,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:28:53,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:28:53,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:28:53,214 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 20:28:53,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:28:53,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206810393] [2023-11-06 20:28:53,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206810393] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:28:53,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:28:53,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:28:53,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594201333] [2023-11-06 20:28:53,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:28:53,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:28:53,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:28:53,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:28:53,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:28:53,217 INFO L87 Difference]: Start difference. First operand 134 states and 536 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 20:28:53,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:28:53,271 INFO L93 Difference]: Finished difference Result 124 states and 500 transitions. [2023-11-06 20:28:53,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:28:53,272 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 7 [2023-11-06 20:28:53,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:28:53,274 INFO L225 Difference]: With dead ends: 124 [2023-11-06 20:28:53,274 INFO L226 Difference]: Without dead ends: 124 [2023-11-06 20:28:53,274 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 20:28:53,275 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 21 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:28:53,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 0 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:28:53,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-11-06 20:28:53,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2023-11-06 20:28:53,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 121 states have (on average 4.132231404958677) internal successors, (500), 123 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:28:53,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 500 transitions. [2023-11-06 20:28:53,284 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 500 transitions. Word has length 7 [2023-11-06 20:28:53,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:28:53,284 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 500 transitions. [2023-11-06 20:28:53,285 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 20:28:53,285 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 500 transitions. [2023-11-06 20:28:53,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-06 20:28:53,286 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:28:53,286 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:28:53,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 20:28:53,286 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 20:28:53,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:28:53,287 INFO L85 PathProgramCache]: Analyzing trace with hash 2108291224, now seen corresponding path program 1 times [2023-11-06 20:28:53,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:28:53,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871967676] [2023-11-06 20:28:53,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:28:53,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:28:53,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:28:53,460 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 20:28:53,460 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:28:53,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871967676] [2023-11-06 20:28:53,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871967676] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:28:53,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:28:53,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:28:53,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241992603] [2023-11-06 20:28:53,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:28:53,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 20:28:53,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:28:53,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 20:28:53,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-06 20:28:53,463 INFO L87 Difference]: Start difference. First operand 124 states and 500 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 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 20:28:53,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:28:53,552 INFO L93 Difference]: Finished difference Result 108 states and 420 transitions. [2023-11-06 20:28:53,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:28:53,553 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2023-11-06 20:28:53,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:28:53,554 INFO L225 Difference]: With dead ends: 108 [2023-11-06 20:28:53,555 INFO L226 Difference]: Without dead ends: 108 [2023-11-06 20:28:53,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-06 20:28:53,556 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 41 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:28:53,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 0 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:28:53,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-11-06 20:28:53,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2023-11-06 20:28:53,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 106 states have (on average 3.9622641509433962) internal successors, (420), 107 states have internal predecessors, (420), 0 states have call successors, (0), 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 20:28:53,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 420 transitions. [2023-11-06 20:28:53,563 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 420 transitions. Word has length 9 [2023-11-06 20:28:53,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:28:53,564 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 420 transitions. [2023-11-06 20:28:53,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 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 20:28:53,564 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 420 transitions. [2023-11-06 20:28:53,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-06 20:28:53,565 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:28:53,565 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:28:53,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 20:28:53,566 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 20:28:53,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:28:53,567 INFO L85 PathProgramCache]: Analyzing trace with hash 2108291226, now seen corresponding path program 1 times [2023-11-06 20:28:53,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:28:53,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717331112] [2023-11-06 20:28:53,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:28:53,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:28:53,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:28:53,905 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 20:28:53,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:28:53,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717331112] [2023-11-06 20:28:53,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717331112] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:28:53,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:28:53,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 20:28:53,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681558324] [2023-11-06 20:28:53,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:28:53,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 20:28:53,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:28:53,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 20:28:53,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:28:53,907 INFO L87 Difference]: Start difference. First operand 108 states and 420 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 20:28:53,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:28:53,960 INFO L93 Difference]: Finished difference Result 92 states and 340 transitions. [2023-11-06 20:28:53,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:28:53,961 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2023-11-06 20:28:53,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:28:53,962 INFO L225 Difference]: With dead ends: 92 [2023-11-06 20:28:53,963 INFO L226 Difference]: Without dead ends: 92 [2023-11-06 20:28:53,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:28:53,964 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 41 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:28:53,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 0 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:28:53,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-11-06 20:28:53,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2023-11-06 20:28:53,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 3.7362637362637363) internal successors, (340), 91 states have internal predecessors, (340), 0 states have call successors, (0), 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 20:28:53,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 340 transitions. [2023-11-06 20:28:53,970 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 340 transitions. Word has length 9 [2023-11-06 20:28:53,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:28:53,970 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 340 transitions. [2023-11-06 20:28:53,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 20:28:53,971 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 340 transitions. [2023-11-06 20:28:53,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-06 20:28:53,972 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:28:53,972 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:28:53,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 20:28:53,973 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 20:28:53,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:28:53,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1776165060, now seen corresponding path program 1 times [2023-11-06 20:28:53,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:28:53,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528833503] [2023-11-06 20:28:53,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:28:53,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:28:53,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:28:54,102 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 20:28:54,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:28:54,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528833503] [2023-11-06 20:28:54,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528833503] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:28:54,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:28:54,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:28:54,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857306829] [2023-11-06 20:28:54,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:28:54,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:28:54,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:28:54,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:28:54,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:28:54,105 INFO L87 Difference]: Start difference. First operand 92 states and 340 transitions. Second operand has 3 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:28:54,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:28:54,208 INFO L93 Difference]: Finished difference Result 181 states and 677 transitions. [2023-11-06 20:28:54,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:28:54,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-06 20:28:54,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:28:54,211 INFO L225 Difference]: With dead ends: 181 [2023-11-06 20:28:54,211 INFO L226 Difference]: Without dead ends: 172 [2023-11-06 20:28:54,211 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 20:28:54,212 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:28:54,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:28:54,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-11-06 20:28:54,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2023-11-06 20:28:54,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 3.7953216374269005) internal successors, (649), 171 states have internal predecessors, (649), 0 states have call successors, (0), 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 20:28:54,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 649 transitions. [2023-11-06 20:28:54,222 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 649 transitions. Word has length 21 [2023-11-06 20:28:54,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:28:54,222 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 649 transitions. [2023-11-06 20:28:54,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:28:54,223 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 649 transitions. [2023-11-06 20:28:54,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-06 20:28:54,225 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:28:54,225 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:28:54,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 20:28:54,225 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 20:28:54,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:28:54,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1790757974, now seen corresponding path program 1 times [2023-11-06 20:28:54,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:28:54,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877482585] [2023-11-06 20:28:54,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:28:54,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:28:54,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:28:54,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:28:54,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:28:54,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877482585] [2023-11-06 20:28:54,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877482585] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:28:54,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:28:54,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 20:28:54,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290233201] [2023-11-06 20:28:54,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:28:54,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:28:54,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:28:54,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:28:54,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:28:54,367 INFO L87 Difference]: Start difference. First operand 172 states and 649 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 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 20:28:54,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:28:54,560 INFO L93 Difference]: Finished difference Result 250 states and 923 transitions. [2023-11-06 20:28:54,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:28:54,560 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2023-11-06 20:28:54,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:28:54,563 INFO L225 Difference]: With dead ends: 250 [2023-11-06 20:28:54,564 INFO L226 Difference]: Without dead ends: 240 [2023-11-06 20:28:54,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:28:54,565 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:28:54,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 0 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:28:54,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-11-06 20:28:54,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 208. [2023-11-06 20:28:54,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 3.8840579710144927) internal successors, (804), 207 states have internal predecessors, (804), 0 states have call successors, (0), 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 20:28:54,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 804 transitions. [2023-11-06 20:28:54,577 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 804 transitions. Word has length 22 [2023-11-06 20:28:54,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:28:54,578 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 804 transitions. [2023-11-06 20:28:54,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 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 20:28:54,578 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 804 transitions. [2023-11-06 20:28:54,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-06 20:28:54,580 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:28:54,580 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:28:54,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 20:28:54,580 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 20:28:54,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:28:54,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1696390561, now seen corresponding path program 1 times [2023-11-06 20:28:54,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:28:54,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523876433] [2023-11-06 20:28:54,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:28:54,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:28:54,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:28:54,688 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 20:28:54,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:28:54,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523876433] [2023-11-06 20:28:54,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523876433] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:28:54,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922214917] [2023-11-06 20:28:54,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:28:54,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:28:54,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49164d6-ae21-4627-af1f-421666a9abd5/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:28:54,693 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49164d6-ae21-4627-af1f-421666a9abd5/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:28:54,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49164d6-ae21-4627-af1f-421666a9abd5/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 20:28:54,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:28:54,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 20:28:54,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:28:55,044 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 20:28:55,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:28:55,146 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 20:28:55,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922214917] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:28:55,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1139887164] [2023-11-06 20:28:55,155 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 20:28:55,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:28:55,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-06 20:28:55,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560327203] [2023-11-06 20:28:55,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:28:55,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 20:28:55,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:28:55,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 20:28:55,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 20:28:55,160 INFO L87 Difference]: Start difference. First operand 208 states and 804 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 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 20:28:55,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:28:55,349 INFO L93 Difference]: Finished difference Result 302 states and 1108 transitions. [2023-11-06 20:28:55,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:28:55,350 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 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 22 [2023-11-06 20:28:55,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:28:55,353 INFO L225 Difference]: With dead ends: 302 [2023-11-06 20:28:55,353 INFO L226 Difference]: Without dead ends: 302 [2023-11-06 20:28:55,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-06 20:28:55,354 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:28:55,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:28:55,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2023-11-06 20:28:55,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 238. [2023-11-06 20:28:55,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 3.8987341772151898) internal successors, (924), 237 states have internal predecessors, (924), 0 states have call successors, (0), 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 20:28:55,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 924 transitions. [2023-11-06 20:28:55,370 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 924 transitions. Word has length 22 [2023-11-06 20:28:55,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:28:55,371 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 924 transitions. [2023-11-06 20:28:55,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 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 20:28:55,371 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 924 transitions. [2023-11-06 20:28:55,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-06 20:28:55,372 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:28:55,373 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:28:55,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49164d6-ae21-4627-af1f-421666a9abd5/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 20:28:55,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49164d6-ae21-4627-af1f-421666a9abd5/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 20:28:55,585 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 20:28:55,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:28:55,585 INFO L85 PathProgramCache]: Analyzing trace with hash 722760256, now seen corresponding path program 2 times [2023-11-06 20:28:55,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:28:55,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399002160] [2023-11-06 20:28:55,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:28:55,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:28:55,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:28:55,696 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 20:28:55,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:28:55,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399002160] [2023-11-06 20:28:55,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399002160] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:28:55,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121028366] [2023-11-06 20:28:55,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 20:28:55,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:28:55,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49164d6-ae21-4627-af1f-421666a9abd5/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:28:55,698 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49164d6-ae21-4627-af1f-421666a9abd5/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:28:55,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49164d6-ae21-4627-af1f-421666a9abd5/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 20:28:55,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 20:28:55,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 20:28:55,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 20:28:55,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:28:55,953 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 20:28:55,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:28:56,049 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 20:28:56,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121028366] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:28:56,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [473539790] [2023-11-06 20:28:56,052 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 20:28:56,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:28:56,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-06 20:28:56,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885512133] [2023-11-06 20:28:56,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:28:56,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 20:28:56,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:28:56,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 20:28:56,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 20:28:56,058 INFO L87 Difference]: Start difference. First operand 238 states and 924 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 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 20:28:56,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:28:56,273 INFO L93 Difference]: Finished difference Result 298 states and 1132 transitions. [2023-11-06 20:28:56,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:28:56,274 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 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 22 [2023-11-06 20:28:56,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:28:56,277 INFO L225 Difference]: With dead ends: 298 [2023-11-06 20:28:56,277 INFO L226 Difference]: Without dead ends: 298 [2023-11-06 20:28:56,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-06 20:28:56,278 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 43 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:28:56,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 0 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:28:56,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2023-11-06 20:28:56,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 260. [2023-11-06 20:28:56,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 3.972972972972973) internal successors, (1029), 259 states have internal predecessors, (1029), 0 states have call successors, (0), 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 20:28:56,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 1029 transitions. [2023-11-06 20:28:56,299 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 1029 transitions. Word has length 22 [2023-11-06 20:28:56,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:28:56,300 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 1029 transitions. [2023-11-06 20:28:56,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 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 20:28:56,300 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 1029 transitions. [2023-11-06 20:28:56,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-06 20:28:56,302 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:28:56,302 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:28:56,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49164d6-ae21-4627-af1f-421666a9abd5/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 20:28:56,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49164d6-ae21-4627-af1f-421666a9abd5/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 20:28:56,509 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 20:28:56,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:28:56,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1175610299, now seen corresponding path program 2 times [2023-11-06 20:28:56,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:28:56,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117560113] [2023-11-06 20:28:56,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:28:56,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:28:56,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:28:56,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:28:56,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:28:56,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117560113] [2023-11-06 20:28:56,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117560113] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:28:56,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:28:56,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 20:28:56,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632975625] [2023-11-06 20:28:56,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:28:56,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:28:56,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:28:56,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:28:56,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:28:56,640 INFO L87 Difference]: Start difference. First operand 260 states and 1029 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 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 20:28:56,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:28:56,812 INFO L93 Difference]: Finished difference Result 298 states and 1104 transitions. [2023-11-06 20:28:56,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:28:56,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2023-11-06 20:28:56,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:28:56,816 INFO L225 Difference]: With dead ends: 298 [2023-11-06 20:28:56,817 INFO L226 Difference]: Without dead ends: 292 [2023-11-06 20:28:56,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:28:56,819 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 43 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:28:56,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 0 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:28:56,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2023-11-06 20:28:56,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 274. [2023-11-06 20:28:56,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.857142857142857) internal successors, (1053), 273 states have internal predecessors, (1053), 0 states have call successors, (0), 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 20:28:56,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 1053 transitions. [2023-11-06 20:28:56,855 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 1053 transitions. Word has length 22 [2023-11-06 20:28:56,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:28:56,855 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 1053 transitions. [2023-11-06 20:28:56,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 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 20:28:56,856 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 1053 transitions. [2023-11-06 20:28:56,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-06 20:28:56,857 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:28:56,857 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:28:56,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-06 20:28:56,859 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 20:28:56,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:28:56,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1941102076, now seen corresponding path program 1 times [2023-11-06 20:28:56,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:28:56,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745876156] [2023-11-06 20:28:56,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:28:56,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:28:56,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:28:56,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:28:56,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:28:56,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745876156] [2023-11-06 20:28:56,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745876156] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:28:56,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:28:56,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 20:28:56,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775905308] [2023-11-06 20:28:56,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:28:56,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:28:56,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:28:56,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:28:56,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:28:56,958 INFO L87 Difference]: Start difference. First operand 274 states and 1053 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 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 20:28:57,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:28:57,124 INFO L93 Difference]: Finished difference Result 410 states and 1537 transitions. [2023-11-06 20:28:57,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:28:57,124 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2023-11-06 20:28:57,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:28:57,128 INFO L225 Difference]: With dead ends: 410 [2023-11-06 20:28:57,129 INFO L226 Difference]: Without dead ends: 396 [2023-11-06 20:28:57,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:28:57,130 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 50 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:28:57,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 0 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:28:57,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2023-11-06 20:28:57,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 316. [2023-11-06 20:28:57,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 3.980952380952381) internal successors, (1254), 315 states have internal predecessors, (1254), 0 states have call successors, (0), 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 20:28:57,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 1254 transitions. [2023-11-06 20:28:57,147 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 1254 transitions. Word has length 22 [2023-11-06 20:28:57,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:28:57,147 INFO L495 AbstractCegarLoop]: Abstraction has 316 states and 1254 transitions. [2023-11-06 20:28:57,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 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 20:28:57,148 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 1254 transitions. [2023-11-06 20:28:57,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-06 20:28:57,149 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:28:57,149 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:28:57,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-06 20:28:57,150 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 20:28:57,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:28:57,150 INFO L85 PathProgramCache]: Analyzing trace with hash -194961759, now seen corresponding path program 1 times [2023-11-06 20:28:57,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:28:57,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534185559] [2023-11-06 20:28:57,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:28:57,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:28:57,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:28:57,248 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 20:28:57,248 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:28:57,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534185559] [2023-11-06 20:28:57,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534185559] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:28:57,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470128734] [2023-11-06 20:28:57,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:28:57,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:28:57,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49164d6-ae21-4627-af1f-421666a9abd5/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:28:57,250 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49164d6-ae21-4627-af1f-421666a9abd5/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:28:57,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49164d6-ae21-4627-af1f-421666a9abd5/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 20:28:57,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:28:57,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 20:28:57,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:28:57,450 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 20:28:57,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:28:57,505 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 20:28:57,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470128734] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:28:57,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [168152093] [2023-11-06 20:28:57,506 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 20:28:57,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:28:57,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-06 20:28:57,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306280034] [2023-11-06 20:28:57,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:28:57,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 20:28:57,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:28:57,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 20:28:57,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 20:28:57,509 INFO L87 Difference]: Start difference. First operand 316 states and 1254 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 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 20:28:57,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:28:57,724 INFO L93 Difference]: Finished difference Result 600 states and 2222 transitions. [2023-11-06 20:28:57,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:28:57,725 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 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 22 [2023-11-06 20:28:57,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:28:57,731 INFO L225 Difference]: With dead ends: 600 [2023-11-06 20:28:57,731 INFO L226 Difference]: Without dead ends: 600 [2023-11-06 20:28:57,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-06 20:28:57,732 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 97 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:28:57,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 0 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:28:57,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2023-11-06 20:28:57,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 402. [2023-11-06 20:28:57,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 4.029925187032419) internal successors, (1616), 401 states have internal predecessors, (1616), 0 states have call successors, (0), 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 20:28:57,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1616 transitions. [2023-11-06 20:28:57,775 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1616 transitions. Word has length 22 [2023-11-06 20:28:57,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:28:57,776 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 1616 transitions. [2023-11-06 20:28:57,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 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 20:28:57,776 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1616 transitions. [2023-11-06 20:28:57,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-06 20:28:57,780 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:28:57,780 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:28:57,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49164d6-ae21-4627-af1f-421666a9abd5/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 20:28:57,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49164d6-ae21-4627-af1f-421666a9abd5/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 20:28:57,987 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 20:28:57,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:28:57,987 INFO L85 PathProgramCache]: Analyzing trace with hash -211603615, now seen corresponding path program 2 times [2023-11-06 20:28:57,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:28:57,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466465866] [2023-11-06 20:28:57,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:28:57,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:28:58,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:28:58,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:28:58,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:28:58,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466465866] [2023-11-06 20:28:58,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466465866] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:28:58,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:28:58,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 20:28:58,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755217947] [2023-11-06 20:28:58,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:28:58,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:28:58,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:28:58,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:28:58,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:28:58,106 INFO L87 Difference]: Start difference. First operand 402 states and 1616 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 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 20:28:58,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:28:58,299 INFO L93 Difference]: Finished difference Result 482 states and 1828 transitions. [2023-11-06 20:28:58,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:28:58,300 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2023-11-06 20:28:58,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:28:58,305 INFO L225 Difference]: With dead ends: 482 [2023-11-06 20:28:58,306 INFO L226 Difference]: Without dead ends: 474 [2023-11-06 20:28:58,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:28:58,312 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 51 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:28:58,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 0 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:28:58,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2023-11-06 20:28:58,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 414. [2023-11-06 20:28:58,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 3.9878934624697338) internal successors, (1647), 413 states have internal predecessors, (1647), 0 states have call successors, (0), 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 20:28:58,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 1647 transitions. [2023-11-06 20:28:58,335 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 1647 transitions. Word has length 22 [2023-11-06 20:28:58,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:28:58,335 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 1647 transitions. [2023-11-06 20:28:58,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 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 20:28:58,336 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 1647 transitions. [2023-11-06 20:28:58,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-06 20:28:58,338 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:28:58,338 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:28:58,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-06 20:28:58,338 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 20:28:58,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:28:58,339 INFO L85 PathProgramCache]: Analyzing trace with hash -662943156, now seen corresponding path program 2 times [2023-11-06 20:28:58,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:28:58,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165060341] [2023-11-06 20:28:58,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:28:58,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:28:58,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:28:58,432 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 20:28:58,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:28:58,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165060341] [2023-11-06 20:28:58,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165060341] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:28:58,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983427836] [2023-11-06 20:28:58,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 20:28:58,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:28:58,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49164d6-ae21-4627-af1f-421666a9abd5/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:28:58,438 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49164d6-ae21-4627-af1f-421666a9abd5/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:28:58,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49164d6-ae21-4627-af1f-421666a9abd5/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 20:28:58,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 20:28:58,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 20:28:58,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 20:28:58,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:28:58,655 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 20:28:58,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:28:58,716 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 20:28:58,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983427836] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:28:58,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [976379882] [2023-11-06 20:28:58,718 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java: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 20:28:58,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:28:58,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-06 20:28:58,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762140854] [2023-11-06 20:28:58,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:28:58,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 20:28:58,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:28:58,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 20:28:58,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 20:28:58,724 INFO L87 Difference]: Start difference. First operand 414 states and 1647 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 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 20:28:58,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:28:58,989 INFO L93 Difference]: Finished difference Result 538 states and 2079 transitions. [2023-11-06 20:28:58,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:28:58,990 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 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 22 [2023-11-06 20:28:58,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:28:58,996 INFO L225 Difference]: With dead ends: 538 [2023-11-06 20:28:58,996 INFO L226 Difference]: Without dead ends: 538 [2023-11-06 20:28:58,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-06 20:28:58,997 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 32 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:28:58,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 0 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:28:58,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2023-11-06 20:28:59,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 478. [2023-11-06 20:28:59,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 4.027253668763103) internal successors, (1921), 477 states have internal predecessors, (1921), 0 states have call successors, (0), 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 20:28:59,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1921 transitions. [2023-11-06 20:28:59,022 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1921 transitions. Word has length 22 [2023-11-06 20:28:59,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:28:59,022 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 1921 transitions. [2023-11-06 20:28:59,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 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 20:28:59,023 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1921 transitions. [2023-11-06 20:28:59,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-06 20:28:59,026 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:28:59,026 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:28:59,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49164d6-ae21-4627-af1f-421666a9abd5/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 20:28:59,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49164d6-ae21-4627-af1f-421666a9abd5/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 20:28:59,233 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-06 20:28:59,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:28:59,233 INFO L85 PathProgramCache]: Analyzing trace with hash -31199853, now seen corresponding path program 1 times [2023-11-06 20:28:59,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:28:59,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77584109] [2023-11-06 20:28:59,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:28:59,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:28:59,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:28:59,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:28:59,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:28:59,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77584109] [2023-11-06 20:28:59,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77584109] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:28:59,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964933898] [2023-11-06 20:28:59,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:28:59,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:28:59,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49164d6-ae21-4627-af1f-421666a9abd5/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:28:59,922 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49164d6-ae21-4627-af1f-421666a9abd5/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:28:59,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a49164d6-ae21-4627-af1f-421666a9abd5/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process