./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/03_incdec-pthread.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 527bcce2 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_2bbe2f2d-3f82-4e63-987e-da10e1d456fe/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe2f2d-3f82-4e63-987e-da10e1d456fe/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe2f2d-3f82-4e63-987e-da10e1d456fe/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe2f2d-3f82-4e63-987e-da10e1d456fe/bin/utaipan-verify-QoSU8krkJ5/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/03_incdec-pthread.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe2f2d-3f82-4e63-987e-da10e1d456fe/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe2f2d-3f82-4e63-987e-da10e1d456fe/bin/utaipan-verify-QoSU8krkJ5 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7f19dc7b6c5c71a67d9914faaf2a1157355ecf0e14b05edf8c2541b2f25a5ffb --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:41:06,009 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:41:06,152 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe2f2d-3f82-4e63-987e-da10e1d456fe/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-21 19:41:06,163 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:41:06,165 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:41:06,211 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:41:06,212 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:41:06,213 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:41:06,214 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:41:06,220 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:41:06,221 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:41:06,221 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:41:06,222 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:41:06,224 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:41:06,224 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:41:06,225 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:41:06,226 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:41:06,226 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:41:06,227 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:41:06,227 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:41:06,228 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:41:06,229 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:41:06,229 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 19:41:06,230 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 19:41:06,231 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:41:06,231 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 19:41:06,232 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:41:06,232 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 19:41:06,233 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:41:06,233 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 19:41:06,235 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 19:41:06,235 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 19:41:06,236 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:41:06,236 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 19:41:06,236 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 19:41:06,237 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 19:41:06,237 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:41:06,238 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:41:06,238 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:41:06,239 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:41:06,239 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:41:06,239 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:41:06,240 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:41:06,240 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:41:06,241 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:41:06,241 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:41:06,241 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:41:06,241 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:41:06,242 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_2bbe2f2d-3f82-4e63-987e-da10e1d456fe/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe2f2d-3f82-4e63-987e-da10e1d456fe/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f19dc7b6c5c71a67d9914faaf2a1157355ecf0e14b05edf8c2541b2f25a5ffb [2023-11-21 19:41:06,563 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:41:06,603 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:41:06,607 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:41:06,609 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:41:06,609 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:41:06,611 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe2f2d-3f82-4e63-987e-da10e1d456fe/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/pthread-ext/03_incdec-pthread.i [2023-11-21 19:41:10,164 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:41:10,583 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:41:10,583 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe2f2d-3f82-4e63-987e-da10e1d456fe/sv-benchmarks/c/pthread-ext/03_incdec-pthread.i [2023-11-21 19:41:10,602 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe2f2d-3f82-4e63-987e-da10e1d456fe/bin/utaipan-verify-QoSU8krkJ5/data/63e45b3d6/e8c05ac2158d41d18be5a60edc0a838f/FLAG8ee4716ca [2023-11-21 19:41:10,621 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe2f2d-3f82-4e63-987e-da10e1d456fe/bin/utaipan-verify-QoSU8krkJ5/data/63e45b3d6/e8c05ac2158d41d18be5a60edc0a838f [2023-11-21 19:41:10,624 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:41:10,626 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:41:10,630 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:41:10,631 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:41:10,637 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:41:10,639 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:41:10" (1/1) ... [2023-11-21 19:41:10,640 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1998b10f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:10, skipping insertion in model container [2023-11-21 19:41:10,641 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:41:10" (1/1) ... [2023-11-21 19:41:10,718 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:41:11,229 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:41:11,247 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:41:11,311 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:41:11,364 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:41:11,365 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:11 WrapperNode [2023-11-21 19:41:11,365 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:41:11,367 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:41:11,367 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:41:11,367 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:41:11,376 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:11" (1/1) ... [2023-11-21 19:41:11,396 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:11" (1/1) ... [2023-11-21 19:41:11,423 INFO L138 Inliner]: procedures = 165, calls = 30, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 105 [2023-11-21 19:41:11,424 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:41:11,424 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:41:11,425 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:41:11,425 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:41:11,435 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:11" (1/1) ... [2023-11-21 19:41:11,436 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:11" (1/1) ... [2023-11-21 19:41:11,439 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:11" (1/1) ... [2023-11-21 19:41:11,440 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:11" (1/1) ... [2023-11-21 19:41:11,449 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:11" (1/1) ... [2023-11-21 19:41:11,453 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:11" (1/1) ... [2023-11-21 19:41:11,456 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:11" (1/1) ... [2023-11-21 19:41:11,457 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:11" (1/1) ... [2023-11-21 19:41:11,461 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:41:11,462 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:41:11,462 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:41:11,463 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:41:11,464 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:11" (1/1) ... [2023-11-21 19:41:11,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:41:11,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe2f2d-3f82-4e63-987e-da10e1d456fe/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:41:11,504 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe2f2d-3f82-4e63-987e-da10e1d456fe/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:41:11,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbe2f2d-3f82-4e63-987e-da10e1d456fe/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:41:11,572 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-21 19:41:11,572 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-21 19:41:11,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 19:41:11,573 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-21 19:41:11,573 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:41:11,573 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 19:41:11,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 19:41:11,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:41:11,573 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-21 19:41:11,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:41:11,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:41:11,576 WARN L212 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-21 19:41:11,772 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:41:11,774 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:41:12,052 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:41:12,338 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:41:12,339 INFO L308 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-21 19:41:12,342 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:41:12 BoogieIcfgContainer [2023-11-21 19:41:12,343 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:41:12,348 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:41:12,348 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:41:12,353 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:41:12,354 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:41:10" (1/3) ... [2023-11-21 19:41:12,357 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f898a95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:41:12, skipping insertion in model container [2023-11-21 19:41:12,357 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:41:11" (2/3) ... [2023-11-21 19:41:12,360 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f898a95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:41:12, skipping insertion in model container [2023-11-21 19:41:12,360 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:41:12" (3/3) ... [2023-11-21 19:41:12,363 INFO L112 eAbstractionObserver]: Analyzing ICFG 03_incdec-pthread.i [2023-11-21 19:41:12,387 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:41:12,388 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2023-11-21 19:41:12,388 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-21 19:41:12,450 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 19:41:12,487 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 51 places, 55 transitions, 114 flow [2023-11-21 19:41:12,555 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 374 states, 357 states have (on average 2.11484593837535) internal successors, (755), 373 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:41:12,576 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:41:12,588 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;@4f850a69, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:41:12,589 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-21 19:41:12,594 INFO L276 IsEmpty]: Start isEmpty. Operand has 374 states, 357 states have (on average 2.11484593837535) internal successors, (755), 373 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:41:12,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-21 19:41:12,601 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:12,601 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-21 19:41:12,602 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-21 19:41:12,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:12,608 INFO L85 PathProgramCache]: Analyzing trace with hash 329220, now seen corresponding path program 1 times [2023-11-21 19:41:12,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:12,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365646376] [2023-11-21 19:41:12,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:12,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:12,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:13,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:41:13,010 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:13,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365646376] [2023-11-21 19:41:13,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365646376] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:41:13,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:41:13,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 19:41:13,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164936843] [2023-11-21 19:41:13,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:41:13,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:41:13,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:13,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:41:13,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:41:13,071 INFO L87 Difference]: Start difference. First operand has 374 states, 357 states have (on average 2.11484593837535) internal successors, (755), 373 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:41:13,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:13,218 INFO L93 Difference]: Finished difference Result 221 states and 413 transitions. [2023-11-21 19:41:13,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:41:13,221 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 [2023-11-21 19:41:13,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:13,251 INFO L225 Difference]: With dead ends: 221 [2023-11-21 19:41:13,251 INFO L226 Difference]: Without dead ends: 221 [2023-11-21 19:41:13,253 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 [2023-11-21 19:41:13,259 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 43 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:13,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 15 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:41:13,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2023-11-21 19:41:13,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2023-11-21 19:41:13,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 214 states have (on average 1.9299065420560748) internal successors, (413), 220 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:41:13,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 413 transitions. [2023-11-21 19:41:13,347 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 413 transitions. Word has length 3 [2023-11-21 19:41:13,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:41:13,348 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 413 transitions. [2023-11-21 19:41:13,348 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) [2023-11-21 19:41:13,348 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 413 transitions. [2023-11-21 19:41:13,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-21 19:41:13,349 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:13,349 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-21 19:41:13,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 19:41:13,350 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-21 19:41:13,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:13,350 INFO L85 PathProgramCache]: Analyzing trace with hash 329221, now seen corresponding path program 1 times [2023-11-21 19:41:13,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:13,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3053497] [2023-11-21 19:41:13,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:13,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:13,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:13,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:41:13,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:13,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3053497] [2023-11-21 19:41:13,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3053497] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:41:13,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:41:13,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 19:41:13,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958531503] [2023-11-21 19:41:13,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:41:13,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:41:13,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:13,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:41:13,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:41:13,523 INFO L87 Difference]: Start difference. First operand 221 states and 413 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) [2023-11-21 19:41:13,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:13,584 INFO L93 Difference]: Finished difference Result 184 states and 338 transitions. [2023-11-21 19:41:13,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:41:13,585 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 [2023-11-21 19:41:13,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:13,590 INFO L225 Difference]: With dead ends: 184 [2023-11-21 19:41:13,590 INFO L226 Difference]: Without dead ends: 184 [2023-11-21 19:41:13,590 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 [2023-11-21 19:41:13,593 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:13,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 15 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:41:13,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-11-21 19:41:13,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2023-11-21 19:41:13,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 181 states have (on average 1.867403314917127) internal successors, (338), 183 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:41:13,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 338 transitions. [2023-11-21 19:41:13,610 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 338 transitions. Word has length 3 [2023-11-21 19:41:13,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:41:13,611 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 338 transitions. [2023-11-21 19:41:13,611 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) [2023-11-21 19:41:13,611 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 338 transitions. [2023-11-21 19:41:13,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-21 19:41:13,612 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:13,612 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2023-11-21 19:41:13,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 19:41:13,613 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err1ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-21 19:41:13,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:13,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1856602178, now seen corresponding path program 1 times [2023-11-21 19:41:13,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:13,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357161532] [2023-11-21 19:41:13,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:13,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:13,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 19:41:13,642 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-21 19:41:13,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 19:41:13,695 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-21 19:41:13,696 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-21 19:41:13,697 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-11-21 19:41:13,700 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONMEMORY_LEAK (6 of 8 remaining) [2023-11-21 19:41:13,701 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (5 of 8 remaining) [2023-11-21 19:41:13,702 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2023-11-21 19:41:13,703 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 8 remaining) [2023-11-21 19:41:13,708 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (2 of 8 remaining) [2023-11-21 19:41:13,709 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONMEMORY_LEAK (1 of 8 remaining) [2023-11-21 19:41:13,711 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2023-11-21 19:41:13,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 19:41:13,715 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-21 19:41:13,726 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-21 19:41:13,727 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-21 19:41:13,791 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 19:41:13,795 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 91 places, 100 transitions, 210 flow [2023-11-21 19:41:14,549 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 14580 states, 14522 states have (on average 3.192604324473213) internal successors, (46363), 14579 states have internal predecessors, (46363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:41:14,551 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:41:14,554 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;@4f850a69, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:41:14,565 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-11-21 19:41:14,609 INFO L276 IsEmpty]: Start isEmpty. Operand has 14580 states, 14522 states have (on average 3.192604324473213) internal successors, (46363), 14579 states have internal predecessors, (46363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:41:14,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-21 19:41:14,615 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:14,615 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-21 19:41:14,616 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-21 19:41:14,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:14,617 INFO L85 PathProgramCache]: Analyzing trace with hash 428520, now seen corresponding path program 1 times [2023-11-21 19:41:14,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:14,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531688920] [2023-11-21 19:41:14,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:14,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:14,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:14,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:41:14,818 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:14,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531688920] [2023-11-21 19:41:14,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531688920] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:41:14,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:41:14,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 19:41:14,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736503896] [2023-11-21 19:41:14,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:41:14,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:41:14,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:14,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:41:14,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:41:14,865 INFO L87 Difference]: Start difference. First operand has 14580 states, 14522 states have (on average 3.192604324473213) internal successors, (46363), 14579 states have internal predecessors, (46363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:41:15,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:15,169 INFO L93 Difference]: Finished difference Result 7961 states and 23271 transitions. [2023-11-21 19:41:15,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:41:15,170 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 [2023-11-21 19:41:15,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:15,328 INFO L225 Difference]: With dead ends: 7961 [2023-11-21 19:41:15,329 INFO L226 Difference]: Without dead ends: 7961 [2023-11-21 19:41:15,329 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 [2023-11-21 19:41:15,331 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 82 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:15,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 29 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:41:15,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7961 states. [2023-11-21 19:41:15,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7961 to 7961. [2023-11-21 19:41:15,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7961 states, 7939 states have (on average 2.9312255951631188) internal successors, (23271), 7960 states have internal predecessors, (23271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:41:15,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7961 states to 7961 states and 23271 transitions. [2023-11-21 19:41:15,746 INFO L78 Accepts]: Start accepts. Automaton has 7961 states and 23271 transitions. Word has length 3 [2023-11-21 19:41:15,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:41:15,747 INFO L495 AbstractCegarLoop]: Abstraction has 7961 states and 23271 transitions. [2023-11-21 19:41:15,748 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) [2023-11-21 19:41:15,748 INFO L276 IsEmpty]: Start isEmpty. Operand 7961 states and 23271 transitions. [2023-11-21 19:41:15,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-21 19:41:15,749 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:15,750 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-21 19:41:15,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 19:41:15,750 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-21 19:41:15,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:15,751 INFO L85 PathProgramCache]: Analyzing trace with hash 428521, now seen corresponding path program 1 times [2023-11-21 19:41:15,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:15,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622283856] [2023-11-21 19:41:15,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:15,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:15,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:15,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:41:15,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:15,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622283856] [2023-11-21 19:41:15,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622283856] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:41:15,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:41:15,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 19:41:15,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493926429] [2023-11-21 19:41:15,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:41:15,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:41:15,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:15,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:41:15,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:41:15,868 INFO L87 Difference]: Start difference. First operand 7961 states and 23271 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) [2023-11-21 19:41:16,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:16,187 INFO L93 Difference]: Finished difference Result 6628 states and 19164 transitions. [2023-11-21 19:41:16,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:41:16,188 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 [2023-11-21 19:41:16,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:41:16,281 INFO L225 Difference]: With dead ends: 6628 [2023-11-21 19:41:16,281 INFO L226 Difference]: Without dead ends: 6628 [2023-11-21 19:41:16,282 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 [2023-11-21 19:41:16,286 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 81 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:41:16,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 29 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:41:16,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6628 states. [2023-11-21 19:41:16,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6628 to 6628. [2023-11-21 19:41:16,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6628 states, 6619 states have (on average 2.8953014050460797) internal successors, (19164), 6627 states have internal predecessors, (19164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:41:16,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6628 states to 6628 states and 19164 transitions. [2023-11-21 19:41:16,715 INFO L78 Accepts]: Start accepts. Automaton has 6628 states and 19164 transitions. Word has length 3 [2023-11-21 19:41:16,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:41:16,716 INFO L495 AbstractCegarLoop]: Abstraction has 6628 states and 19164 transitions. [2023-11-21 19:41:16,716 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) [2023-11-21 19:41:16,717 INFO L276 IsEmpty]: Start isEmpty. Operand 6628 states and 19164 transitions. [2023-11-21 19:41:16,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-21 19:41:16,720 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:16,720 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2023-11-21 19:41:16,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 19:41:16,721 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err1ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-21 19:41:16,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:16,722 INFO L85 PathProgramCache]: Analyzing trace with hash -307501885, now seen corresponding path program 1 times [2023-11-21 19:41:16,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:16,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476802127] [2023-11-21 19:41:16,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:16,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:16,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 19:41:16,807 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-21 19:41:16,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 19:41:16,831 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-21 19:41:16,831 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-21 19:41:16,832 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2023-11-21 19:41:16,832 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONMEMORY_LEAK (8 of 10 remaining) [2023-11-21 19:41:16,832 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (7 of 10 remaining) [2023-11-21 19:41:16,833 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2023-11-21 19:41:16,833 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2023-11-21 19:41:16,834 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (4 of 10 remaining) [2023-11-21 19:41:16,834 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2023-11-21 19:41:16,834 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 10 remaining) [2023-11-21 19:41:16,835 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONMEMORY_LEAK (1 of 10 remaining) [2023-11-21 19:41:16,835 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2023-11-21 19:41:16,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 19:41:16,836 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-21 19:41:16,837 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-21 19:41:16,837 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-21 19:41:16,899 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 19:41:16,905 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 131 places, 145 transitions, 308 flow [2023-11-21 19:41:41,428 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 559112 states, 558929 states have (on average 4.34376280350456) internal successors, (2427855), 559111 states have internal predecessors, (2427855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:41:41,432 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:41:41,447 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4f850a69, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:41:41,447 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-11-21 19:41:44,382 INFO L276 IsEmpty]: Start isEmpty. Operand has 559112 states, 558929 states have (on average 4.34376280350456) internal successors, (2427855), 559111 states have internal predecessors, (2427855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:41:44,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-21 19:41:44,383 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:41:44,383 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-21 19:41:44,383 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err1ASSERT_VIOLATIONMEMORY_LEAK, thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-21 19:41:44,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:41:44,384 INFO L85 PathProgramCache]: Analyzing trace with hash 572505, now seen corresponding path program 1 times [2023-11-21 19:41:44,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:41:44,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538429490] [2023-11-21 19:41:44,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:41:44,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:41:44,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:41:44,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:41:44,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:41:44,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538429490] [2023-11-21 19:41:44,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538429490] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:41:44,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:41:44,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 19:41:44,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704389810] [2023-11-21 19:41:44,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:41:44,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:41:44,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:41:44,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:41:44,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:41:45,385 INFO L87 Difference]: Start difference. First operand has 559112 states, 558929 states have (on average 4.34376280350456) internal successors, (2427855), 559111 states have internal predecessors, (2427855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:41:50,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:41:50,754 INFO L93 Difference]: Finished difference Result 286601 states and 1140279 transitions. [2023-11-21 19:41:50,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:41:50,754 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 [2023-11-21 19:41:50,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted.