./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-commit-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1a33cf-890b-43b0-8ce8-12e06e1f4e89/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1a33cf-890b-43b0-8ce8-12e06e1f4e89/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1a33cf-890b-43b0-8ce8-12e06e1f4e89/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1a33cf-890b-43b0-8ce8-12e06e1f4e89/bin/utaipan-verify-sOmjnqqW8E/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-commit-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1a33cf-890b-43b0-8ce8-12e06e1f4e89/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1a33cf-890b-43b0-8ce8-12e06e1f4e89/bin/utaipan-verify-sOmjnqqW8E --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 ec2334e7e9ec2636c6abf161aed91fff94fbff3709d38c7edad92256c3b5dc81 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 02:45:00,201 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 02:45:00,319 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1a33cf-890b-43b0-8ce8-12e06e1f4e89/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-14 02:45:00,328 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 02:45:00,330 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 02:45:00,375 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 02:45:00,376 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 02:45:00,376 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 02:45:00,377 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 02:45:00,377 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 02:45:00,378 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 02:45:00,378 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 02:45:00,378 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 02:45:00,378 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 02:45:00,378 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 02:45:00,380 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 02:45:00,380 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 02:45:00,381 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 02:45:00,381 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 02:45:00,381 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 02:45:00,381 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 02:45:00,381 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 02:45:00,382 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-14 02:45:00,382 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-14 02:45:00,382 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 02:45:00,382 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 02:45:00,382 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 02:45:00,382 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 02:45:00,382 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 02:45:00,382 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-14 02:45:00,383 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-14 02:45:00,383 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-14 02:45:00,383 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 02:45:00,384 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-14 02:45:00,384 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 02:45:00,384 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-14 02:45:00,384 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 02:45:00,384 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 02:45:00,384 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 02:45:00,384 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 02:45:00,384 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 02:45:00,385 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 02:45:00,385 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 02:45:00,385 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 02:45:00,385 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 02:45:00,385 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 02:45:00,385 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 02:45:00,385 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 02:45:00,385 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 02:45:00,385 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_6f1a33cf-890b-43b0-8ce8-12e06e1f4e89/bin/utaipan-verify-sOmjnqqW8E 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 -> ec2334e7e9ec2636c6abf161aed91fff94fbff3709d38c7edad92256c3b5dc81 [2024-11-14 02:45:00,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 02:45:00,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 02:45:00,816 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 02:45:00,818 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 02:45:00,818 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 02:45:00,820 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1a33cf-890b-43b0-8ce8-12e06e1f4e89/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/weaver/popl20-commit-2.wvr.c Unable to find full path for "g++" [2024-11-14 02:45:02,753 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 02:45:03,127 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 02:45:03,131 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1a33cf-890b-43b0-8ce8-12e06e1f4e89/sv-benchmarks/c/weaver/popl20-commit-2.wvr.c [2024-11-14 02:45:03,146 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1a33cf-890b-43b0-8ce8-12e06e1f4e89/bin/utaipan-verify-sOmjnqqW8E/data/78bc42757/ccdfa2f4b1d54250bdb947be795ba687/FLAGcd1147a2e [2024-11-14 02:45:03,175 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1a33cf-890b-43b0-8ce8-12e06e1f4e89/bin/utaipan-verify-sOmjnqqW8E/data/78bc42757/ccdfa2f4b1d54250bdb947be795ba687 [2024-11-14 02:45:03,177 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 02:45:03,180 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 02:45:03,181 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 02:45:03,182 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 02:45:03,187 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 02:45:03,188 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 02:45:03" (1/1) ... [2024-11-14 02:45:03,190 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f958504 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:45:03, skipping insertion in model container [2024-11-14 02:45:03,190 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 02:45:03" (1/1) ... [2024-11-14 02:45:03,221 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 02:45:03,504 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-14 02:45:03,507 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 02:45:03,523 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 02:45:03,569 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 02:45:03,589 INFO L204 MainTranslator]: Completed translation [2024-11-14 02:45:03,589 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:45:03 WrapperNode [2024-11-14 02:45:03,590 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 02:45:03,591 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 02:45:03,591 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 02:45:03,591 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 02:45:03,596 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:45:03" (1/1) ... [2024-11-14 02:45:03,606 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:45:03" (1/1) ... [2024-11-14 02:45:03,652 INFO L138 Inliner]: procedures = 25, calls = 74, calls flagged for inlining = 28, calls inlined = 34, statements flattened = 455 [2024-11-14 02:45:03,652 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 02:45:03,653 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 02:45:03,653 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 02:45:03,653 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 02:45:03,667 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:45:03" (1/1) ... [2024-11-14 02:45:03,668 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:45:03" (1/1) ... [2024-11-14 02:45:03,677 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:45:03" (1/1) ... [2024-11-14 02:45:03,678 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:45:03" (1/1) ... [2024-11-14 02:45:03,701 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:45:03" (1/1) ... [2024-11-14 02:45:03,707 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:45:03" (1/1) ... [2024-11-14 02:45:03,710 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:45:03" (1/1) ... [2024-11-14 02:45:03,712 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:45:03" (1/1) ... [2024-11-14 02:45:03,717 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 02:45:03,718 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 02:45:03,718 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 02:45:03,718 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 02:45:03,719 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:45:03" (1/1) ... [2024-11-14 02:45:03,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 02:45:03,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1a33cf-890b-43b0-8ce8-12e06e1f4e89/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:45:03,760 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1a33cf-890b-43b0-8ce8-12e06e1f4e89/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 02:45:03,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1a33cf-890b-43b0-8ce8-12e06e1f4e89/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 02:45:03,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 02:45:03,789 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-14 02:45:03,789 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-14 02:45:03,789 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-14 02:45:03,790 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-14 02:45:03,790 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-14 02:45:03,791 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-14 02:45:03,791 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-14 02:45:03,791 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-14 02:45:03,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 02:45:03,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 02:45:03,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-14 02:45:03,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-14 02:45:03,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-14 02:45:03,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 02:45:03,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 02:45:03,793 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 02:45:03,795 WARN L207 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-14 02:45:03,991 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 02:45:03,994 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 02:45:05,311 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-14 02:45:05,311 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 02:45:06,192 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 02:45:06,192 INFO L316 CfgBuilder]: Removed 8 assume(true) statements. [2024-11-14 02:45:06,192 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 02:45:06 BoogieIcfgContainer [2024-11-14 02:45:06,193 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 02:45:06,196 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 02:45:06,196 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 02:45:06,201 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 02:45:06,202 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 02:45:03" (1/3) ... [2024-11-14 02:45:06,202 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fd95164 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 02:45:06, skipping insertion in model container [2024-11-14 02:45:06,202 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:45:03" (2/3) ... [2024-11-14 02:45:06,203 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fd95164 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 02:45:06, skipping insertion in model container [2024-11-14 02:45:06,203 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 02:45:06" (3/3) ... [2024-11-14 02:45:06,205 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-commit-2.wvr.c [2024-11-14 02:45:06,226 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 02:45:06,228 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-commit-2.wvr.c that has 5 procedures, 91 locations, 1 initial locations, 8 loop locations, and 34 error locations. [2024-11-14 02:45:06,229 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-14 02:45:06,402 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-14 02:45:06,451 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 103 places, 102 transitions, 232 flow [2024-11-14 02:45:11,454 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 68830 states, 67196 states have (on average 4.85441097684386) internal successors, (326197), 68829 states have internal predecessors, (326197), 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) [2024-11-14 02:45:11,492 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 02:45:11,513 INFO L333 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, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@613172a8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 02:45:11,514 INFO L334 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2024-11-14 02:45:11,820 INFO L276 IsEmpty]: Start isEmpty. Operand has 68830 states, 67196 states have (on average 4.85441097684386) internal successors, (326197), 68829 states have internal predecessors, (326197), 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) [2024-11-14 02:45:11,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-14 02:45:11,844 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:45:11,844 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-14 02:45:11,845 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-14 02:45:11,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:45:11,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1399518, now seen corresponding path program 1 times [2024-11-14 02:45:11,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:45:11,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644260500] [2024-11-14 02:45:11,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:45:11,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:45:12,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:45:12,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:45:12,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:45:12,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644260500] [2024-11-14 02:45:12,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644260500] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:45:12,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:45:12,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-14 02:45:12,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571948566] [2024-11-14 02:45:12,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:45:12,275 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:45:12,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:45:12,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:45:12,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:45:12,461 INFO L87 Difference]: Start difference. First operand has 68830 states, 67196 states have (on average 4.85441097684386) internal successors, (326197), 68829 states have internal predecessors, (326197), 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) [2024-11-14 02:45:15,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:45:15,326 INFO L93 Difference]: Finished difference Result 103200 states and 474476 transitions. [2024-11-14 02:45:15,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:45:15,330 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 [2024-11-14 02:45:15,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:45:16,725 INFO L225 Difference]: With dead ends: 103200 [2024-11-14 02:45:16,725 INFO L226 Difference]: Without dead ends: 68824 [2024-11-14 02:45:16,841 INFO L431 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 [2024-11-14 02:45:16,849 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 02:45:16,850 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 10 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 02:45:17,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68824 states. [2024-11-14 02:45:20,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68824 to 68824. [2024-11-14 02:45:20,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68824 states, 67195 states have (on average 4.540828930724012) internal successors, (305121), 68823 states have internal predecessors, (305121), 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) [2024-11-14 02:45:22,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68824 states to 68824 states and 305121 transitions. [2024-11-14 02:45:22,324 INFO L78 Accepts]: Start accepts. Automaton has 68824 states and 305121 transitions. Word has length 3 [2024-11-14 02:45:22,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:45:22,325 INFO L471 AbstractCegarLoop]: Abstraction has 68824 states and 305121 transitions. [2024-11-14 02:45:22,325 INFO L472 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) [2024-11-14 02:45:22,325 INFO L276 IsEmpty]: Start isEmpty. Operand 68824 states and 305121 transitions. [2024-11-14 02:45:22,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-14 02:45:22,326 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:45:22,326 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-14 02:45:22,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 02:45:22,326 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-14 02:45:22,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:45:22,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1399519, now seen corresponding path program 1 times [2024-11-14 02:45:22,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:45:22,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60005582] [2024-11-14 02:45:22,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:45:22,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:45:22,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:45:22,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:45:22,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:45:22,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60005582] [2024-11-14 02:45:22,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60005582] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:45:22,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:45:22,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 02:45:22,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393162752] [2024-11-14 02:45:22,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:45:22,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 02:45:22,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:45:22,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 02:45:22,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 02:45:22,859 INFO L87 Difference]: Start difference. First operand 68824 states and 305121 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 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) [2024-11-14 02:45:24,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:45:24,615 INFO L93 Difference]: Finished difference Result 68824 states and 305121 transitions. [2024-11-14 02:45:24,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 02:45:24,616 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 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 [2024-11-14 02:45:24,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:45:25,176 INFO L225 Difference]: With dead ends: 68824 [2024-11-14 02:45:25,177 INFO L226 Difference]: Without dead ends: 68820 [2024-11-14 02:45:25,198 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 02:45:25,199 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 02:45:25,200 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 15 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 02:45:25,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68820 states. [2024-11-14 02:45:27,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68820 to 68820. [2024-11-14 02:45:28,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68820 states, 67195 states have (on average 4.540769402485304) internal successors, (305117), 68819 states have internal predecessors, (305117), 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) [2024-11-14 02:45:29,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68820 states to 68820 states and 305117 transitions. [2024-11-14 02:45:29,319 INFO L78 Accepts]: Start accepts. Automaton has 68820 states and 305117 transitions. Word has length 3 [2024-11-14 02:45:29,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:45:29,320 INFO L471 AbstractCegarLoop]: Abstraction has 68820 states and 305117 transitions. [2024-11-14 02:45:29,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 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) [2024-11-14 02:45:29,320 INFO L276 IsEmpty]: Start isEmpty. Operand 68820 states and 305117 transitions. [2024-11-14 02:45:29,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 02:45:29,321 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:45:29,321 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:45:29,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 02:45:29,321 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-14 02:45:29,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:45:29,322 INFO L85 PathProgramCache]: Analyzing trace with hash 704678353, now seen corresponding path program 1 times [2024-11-14 02:45:29,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:45:29,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410993877] [2024-11-14 02:45:29,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:45:29,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:45:29,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:45:29,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:45:29,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:45:29,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410993877] [2024-11-14 02:45:29,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410993877] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:45:29,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:45:29,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-14 02:45:29,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646818295] [2024-11-14 02:45:29,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:45:29,540 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:45:29,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:45:29,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:45:29,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:45:29,541 INFO L87 Difference]: Start difference. First operand 68820 states and 305117 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2024-11-14 02:45:31,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:45:31,736 INFO L93 Difference]: Finished difference Result 148796 states and 663637 transitions. [2024-11-14 02:45:31,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:45:31,737 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 10 [2024-11-14 02:45:31,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:45:33,176 INFO L225 Difference]: With dead ends: 148796 [2024-11-14 02:45:33,176 INFO L226 Difference]: Without dead ends: 82898 [2024-11-14 02:45:33,279 INFO L431 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 [2024-11-14 02:45:33,280 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 50 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 02:45:33,280 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 10 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 02:45:33,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82898 states. [2024-11-14 02:45:35,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82898 to 77444. [2024-11-14 02:45:36,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77444 states, 75745 states have (on average 4.534556736418246) internal successors, (343470), 77443 states have internal predecessors, (343470), 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) [2024-11-14 02:45:37,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77444 states to 77444 states and 343470 transitions. [2024-11-14 02:45:37,227 INFO L78 Accepts]: Start accepts. Automaton has 77444 states and 343470 transitions. Word has length 10 [2024-11-14 02:45:37,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:45:37,227 INFO L471 AbstractCegarLoop]: Abstraction has 77444 states and 343470 transitions. [2024-11-14 02:45:37,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2024-11-14 02:45:37,228 INFO L276 IsEmpty]: Start isEmpty. Operand 77444 states and 343470 transitions. [2024-11-14 02:45:37,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-14 02:45:37,229 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:45:37,229 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:45:37,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 02:45:37,229 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-14 02:45:37,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:45:37,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1828308986, now seen corresponding path program 1 times [2024-11-14 02:45:37,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:45:37,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089699607] [2024-11-14 02:45:37,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:45:37,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:45:37,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:45:37,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:45:37,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:45:37,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089699607] [2024-11-14 02:45:37,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089699607] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:45:37,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:45:37,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 02:45:37,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456575441] [2024-11-14 02:45:37,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:45:37,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:45:37,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:45:37,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:45:37,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:45:37,437 INFO L87 Difference]: Start difference. First operand 77444 states and 343470 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2024-11-14 02:45:39,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:45:39,761 INFO L93 Difference]: Finished difference Result 153798 states and 688729 transitions. [2024-11-14 02:45:39,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:45:39,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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 12 [2024-11-14 02:45:39,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:45:40,786 INFO L225 Difference]: With dead ends: 153798 [2024-11-14 02:45:40,786 INFO L226 Difference]: Without dead ends: 87197 [2024-11-14 02:45:40,912 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:45:40,913 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 54 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 02:45:40,913 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 9 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 02:45:41,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87197 states. [2024-11-14 02:45:44,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87197 to 81623. [2024-11-14 02:45:44,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81623 states, 79846 states have (on average 4.530659018610826) internal successors, (361755), 81622 states have internal predecessors, (361755), 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) [2024-11-14 02:45:45,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81623 states to 81623 states and 361755 transitions. [2024-11-14 02:45:45,357 INFO L78 Accepts]: Start accepts. Automaton has 81623 states and 361755 transitions. Word has length 12 [2024-11-14 02:45:45,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:45:45,359 INFO L471 AbstractCegarLoop]: Abstraction has 81623 states and 361755 transitions. [2024-11-14 02:45:45,359 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2024-11-14 02:45:45,359 INFO L276 IsEmpty]: Start isEmpty. Operand 81623 states and 361755 transitions. [2024-11-14 02:45:45,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-14 02:45:45,364 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:45:45,364 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:45:45,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 02:45:45,365 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-14 02:45:45,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:45:45,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1373568830, now seen corresponding path program 1 times [2024-11-14 02:45:45,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:45:45,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873180353] [2024-11-14 02:45:45,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:45:45,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:45:45,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:45:45,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:45:45,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:45:45,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873180353] [2024-11-14 02:45:45,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873180353] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:45:45,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:45:45,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 02:45:45,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186907461] [2024-11-14 02:45:45,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:45:45,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:45:45,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:45:45,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:45:45,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:45:45,561 INFO L87 Difference]: Start difference. First operand 81623 states and 361755 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 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) [2024-11-14 02:45:47,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:45:47,985 INFO L93 Difference]: Finished difference Result 142845 states and 638835 transitions. [2024-11-14 02:45:47,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:45:47,986 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 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 14 [2024-11-14 02:45:47,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:45:49,739 INFO L225 Difference]: With dead ends: 142845 [2024-11-14 02:45:49,740 INFO L226 Difference]: Without dead ends: 69515 [2024-11-14 02:45:49,805 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:45:49,806 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 56 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 02:45:49,806 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 8 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 02:45:49,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69515 states. [2024-11-14 02:45:51,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69515 to 67322. [2024-11-14 02:45:51,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67322 states, 65567 states have (on average 4.553388137325179) internal successors, (298552), 67321 states have internal predecessors, (298552), 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) [2024-11-14 02:45:52,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67322 states to 67322 states and 298552 transitions. [2024-11-14 02:45:52,465 INFO L78 Accepts]: Start accepts. Automaton has 67322 states and 298552 transitions. Word has length 14 [2024-11-14 02:45:52,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:45:52,465 INFO L471 AbstractCegarLoop]: Abstraction has 67322 states and 298552 transitions. [2024-11-14 02:45:52,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 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) [2024-11-14 02:45:52,465 INFO L276 IsEmpty]: Start isEmpty. Operand 67322 states and 298552 transitions. [2024-11-14 02:45:52,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-14 02:45:52,468 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:45:52,469 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:45:52,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 02:45:52,469 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-11-14 02:45:52,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:45:52,469 INFO L85 PathProgramCache]: Analyzing trace with hash -390089617, now seen corresponding path program 1 times [2024-11-14 02:45:52,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:45:52,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338829269] [2024-11-14 02:45:52,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:45:52,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:45:52,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:45:52,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:45:52,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:45:52,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338829269] [2024-11-14 02:45:52,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338829269] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:45:52,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:45:52,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 02:45:52,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891943133] [2024-11-14 02:45:52,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:45:52,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 02:45:52,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:45:52,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 02:45:52,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 02:45:52,623 INFO L87 Difference]: Start difference. First operand 67322 states and 298552 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:45:55,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:45:55,109 INFO L93 Difference]: Finished difference Result 135472 states and 600455 transitions. [2024-11-14 02:45:55,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 02:45:55,110 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-14 02:45:55,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:45:55,839 INFO L225 Difference]: With dead ends: 135472 [2024-11-14 02:45:55,839 INFO L226 Difference]: Without dead ends: 69052 [2024-11-14 02:45:55,971 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 02:45:55,972 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 37 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 02:45:55,972 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 15 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 02:45:56,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69052 states.