./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946784d8-0ead-4ae0-82a7-07d058007ab2/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946784d8-0ead-4ae0-82a7-07d058007ab2/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946784d8-0ead-4ae0-82a7-07d058007ab2/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946784d8-0ead-4ae0-82a7-07d058007ab2/bin/utaipan-verify-mE87zJ7Ire/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946784d8-0ead-4ae0-82a7-07d058007ab2/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946784d8-0ead-4ae0-82a7-07d058007ab2/bin/utaipan-verify-mE87zJ7Ire --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 6b30bad195dde021066febd52c7985271e0448c265b66e6efcbd9c3306420e73 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:31:12,645 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:31:12,712 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946784d8-0ead-4ae0-82a7-07d058007ab2/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-23 21:31:12,718 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:31:12,719 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:31:12,747 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:31:12,748 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:31:12,749 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:31:12,749 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:31:12,750 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:31:12,751 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:31:12,751 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:31:12,752 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:31:12,753 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:31:12,753 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:31:12,754 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:31:12,755 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:31:12,755 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:31:12,756 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:31:12,756 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:31:12,767 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:31:12,768 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:31:12,768 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 21:31:12,769 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 21:31:12,770 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:31:12,770 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:31:12,771 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:31:12,771 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:31:12,772 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:31:12,772 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 21:31:12,773 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 21:31:12,773 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 21:31:12,774 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:31:12,774 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 21:31:12,775 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 21:31:12,775 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:31:12,776 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:31:12,777 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:31:12,777 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:31:12,778 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:31:12,778 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:31:12,779 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:31:12,779 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:31:12,780 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:31:12,780 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:31:12,781 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:31:12,781 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:31:12,781 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:31:12,781 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_946784d8-0ead-4ae0-82a7-07d058007ab2/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946784d8-0ead-4ae0-82a7-07d058007ab2/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b30bad195dde021066febd52c7985271e0448c265b66e6efcbd9c3306420e73 [2023-11-23 21:31:13,068 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:31:13,100 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:31:13,104 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:31:13,105 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:31:13,106 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:31:13,107 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946784d8-0ead-4ae0-82a7-07d058007ab2/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2023-11-23 21:31:16,199 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:31:16,464 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:31:16,465 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946784d8-0ead-4ae0-82a7-07d058007ab2/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2023-11-23 21:31:16,474 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946784d8-0ead-4ae0-82a7-07d058007ab2/bin/utaipan-verify-mE87zJ7Ire/data/be3d23148/8c0bb22fb7294c48a202eb62053132f1/FLAG3be80f149 [2023-11-23 21:31:16,521 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946784d8-0ead-4ae0-82a7-07d058007ab2/bin/utaipan-verify-mE87zJ7Ire/data/be3d23148/8c0bb22fb7294c48a202eb62053132f1 [2023-11-23 21:31:16,524 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:31:16,525 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:31:16,527 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:31:16,527 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:31:16,533 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:31:16,534 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:31:16" (1/1) ... [2023-11-23 21:31:16,535 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65dbcbcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:16, skipping insertion in model container [2023-11-23 21:31:16,535 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:31:16" (1/1) ... [2023-11-23 21:31:16,561 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:31:16,783 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:31:16,796 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:31:16,822 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:31:16,831 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:31:16,831 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:31:16,839 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:31:16,839 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:16 WrapperNode [2023-11-23 21:31:16,840 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:31:16,841 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:31:16,841 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:31:16,842 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:31:16,850 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:16" (1/1) ... [2023-11-23 21:31:16,863 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:16" (1/1) ... [2023-11-23 21:31:16,892 INFO L138 Inliner]: procedures = 21, calls = 35, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 62 [2023-11-23 21:31:16,892 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:31:16,893 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:31:16,893 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:31:16,893 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:31:16,903 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:16" (1/1) ... [2023-11-23 21:31:16,903 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:16" (1/1) ... [2023-11-23 21:31:16,906 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:16" (1/1) ... [2023-11-23 21:31:16,906 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:16" (1/1) ... [2023-11-23 21:31:16,913 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:16" (1/1) ... [2023-11-23 21:31:16,920 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:16" (1/1) ... [2023-11-23 21:31:16,923 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:16" (1/1) ... [2023-11-23 21:31:16,925 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:16" (1/1) ... [2023-11-23 21:31:16,928 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:31:16,929 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:31:16,929 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:31:16,932 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:31:16,933 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:16" (1/1) ... [2023-11-23 21:31:16,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:31:16,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946784d8-0ead-4ae0-82a7-07d058007ab2/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:16,969 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946784d8-0ead-4ae0-82a7-07d058007ab2/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:31:16,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946784d8-0ead-4ae0-82a7-07d058007ab2/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:31:17,018 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:31:17,018 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-23 21:31:17,018 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-23 21:31:17,018 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-23 21:31:17,019 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-23 21:31:17,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:31:17,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:31:17,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:31:17,019 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-23 21:31:17,019 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-23 21:31:17,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:31:17,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:31:17,020 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:31:17,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:31:17,023 WARN L213 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-23 21:31:17,123 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:31:17,126 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:31:17,408 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:31:17,624 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:31:17,624 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 21:31:17,625 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:31:17 BoogieIcfgContainer [2023-11-23 21:31:17,625 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:31:17,629 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:31:17,629 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:31:17,651 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:31:17,651 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:31:16" (1/3) ... [2023-11-23 21:31:17,652 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b10ad3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:31:17, skipping insertion in model container [2023-11-23 21:31:17,652 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:16" (2/3) ... [2023-11-23 21:31:17,652 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b10ad3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:31:17, skipping insertion in model container [2023-11-23 21:31:17,652 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:31:17" (3/3) ... [2023-11-23 21:31:17,654 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2023-11-23 21:31:17,695 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:31:17,696 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-23 21:31:17,696 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 21:31:17,811 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-23 21:31:17,853 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 45 places, 40 transitions, 94 flow [2023-11-23 21:31:17,924 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 285 states, 275 states have (on average 2.6472727272727274) internal successors, (728), 284 states have internal predecessors, (728), 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) [2023-11-23 21:31:17,945 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:31:17,952 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;@397fbbb9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:31:17,953 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-11-23 21:31:17,957 INFO L276 IsEmpty]: Start isEmpty. Operand has 285 states, 275 states have (on average 2.6472727272727274) internal successors, (728), 284 states have internal predecessors, (728), 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) [2023-11-23 21:31:17,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-23 21:31:17,964 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:17,964 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-23 21:31:17,965 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-23 21:31:17,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:17,970 INFO L85 PathProgramCache]: Analyzing trace with hash 9107, now seen corresponding path program 1 times [2023-11-23 21:31:17,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:17,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112063295] [2023-11-23 21:31:17,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:17,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:18,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:18,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:18,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:18,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112063295] [2023-11-23 21:31:18,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112063295] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:18,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:18,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 21:31:18,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325675342] [2023-11-23 21:31:18,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:18,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:31:18,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:18,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:31:18,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:31:18,346 INFO L87 Difference]: Start difference. First operand has 285 states, 275 states have (on average 2.6472727272727274) internal successors, (728), 284 states have internal predecessors, (728), 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 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-23 21:31:18,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:18,451 INFO L93 Difference]: Finished difference Result 240 states and 599 transitions. [2023-11-23 21:31:18,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:31:18,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2023-11-23 21:31:18,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:18,476 INFO L225 Difference]: With dead ends: 240 [2023-11-23 21:31:18,476 INFO L226 Difference]: Without dead ends: 240 [2023-11-23 21:31:18,478 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 [2023-11-23 21:31:18,484 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:18,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 12 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:31:18,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-11-23 21:31:18,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2023-11-23 21:31:18,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 233 states have (on average 2.570815450643777) internal successors, (599), 239 states have internal predecessors, (599), 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) [2023-11-23 21:31:18,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 599 transitions. [2023-11-23 21:31:18,550 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 599 transitions. Word has length 2 [2023-11-23 21:31:18,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:18,550 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 599 transitions. [2023-11-23 21:31:18,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-23 21:31:18,551 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 599 transitions. [2023-11-23 21:31:18,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-23 21:31:18,551 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:18,551 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-23 21:31:18,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:31:18,552 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-23 21:31:18,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:18,553 INFO L85 PathProgramCache]: Analyzing trace with hash 9108, now seen corresponding path program 1 times [2023-11-23 21:31:18,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:18,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119386342] [2023-11-23 21:31:18,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:18,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:18,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:18,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:18,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:18,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119386342] [2023-11-23 21:31:18,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119386342] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:18,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:18,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 21:31:18,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683690296] [2023-11-23 21:31:18,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:18,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:31:18,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:18,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:31:18,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:31:18,783 INFO L87 Difference]: Start difference. First operand 240 states and 599 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-23 21:31:18,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:18,855 INFO L93 Difference]: Finished difference Result 197 states and 472 transitions. [2023-11-23 21:31:18,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:31:18,856 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2023-11-23 21:31:18,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:18,859 INFO L225 Difference]: With dead ends: 197 [2023-11-23 21:31:18,859 INFO L226 Difference]: Without dead ends: 197 [2023-11-23 21:31:18,859 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 [2023-11-23 21:31:18,861 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:18,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 12 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:31:18,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-11-23 21:31:18,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2023-11-23 21:31:18,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 2.4583333333333335) internal successors, (472), 196 states have internal predecessors, (472), 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) [2023-11-23 21:31:18,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 472 transitions. [2023-11-23 21:31:18,890 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 472 transitions. Word has length 2 [2023-11-23 21:31:18,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:18,891 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 472 transitions. [2023-11-23 21:31:18,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-23 21:31:18,891 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 472 transitions. [2023-11-23 21:31:18,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-23 21:31:18,892 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:18,892 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 21:31:18,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:31:18,892 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-23 21:31:18,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:18,893 INFO L85 PathProgramCache]: Analyzing trace with hash 271548632, now seen corresponding path program 1 times [2023-11-23 21:31:18,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:18,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059883324] [2023-11-23 21:31:18,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:18,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:18,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:18,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:18,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:18,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059883324] [2023-11-23 21:31:18,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059883324] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:18,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:18,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 21:31:18,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738568191] [2023-11-23 21:31:18,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:18,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:31:18,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:18,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:31:18,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:31:18,988 INFO L87 Difference]: Start difference. First operand 197 states and 472 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:19,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:19,023 INFO L93 Difference]: Finished difference Result 184 states and 446 transitions. [2023-11-23 21:31:19,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:31:19,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-23 21:31:19,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:19,026 INFO L225 Difference]: With dead ends: 184 [2023-11-23 21:31:19,027 INFO L226 Difference]: Without dead ends: 184 [2023-11-23 21:31:19,028 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 [2023-11-23 21:31:19,036 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:19,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 10 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:31:19,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-11-23 21:31:19,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2023-11-23 21:31:19,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 181 states have (on average 2.4640883977900554) internal successors, (446), 183 states have internal predecessors, (446), 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) [2023-11-23 21:31:19,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 446 transitions. [2023-11-23 21:31:19,054 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 446 transitions. Word has length 5 [2023-11-23 21:31:19,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:19,055 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 446 transitions. [2023-11-23 21:31:19,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:19,055 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 446 transitions. [2023-11-23 21:31:19,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-23 21:31:19,056 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:19,056 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 21:31:19,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:31:19,056 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-23 21:31:19,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:19,057 INFO L85 PathProgramCache]: Analyzing trace with hash 271548633, now seen corresponding path program 1 times [2023-11-23 21:31:19,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:19,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819395118] [2023-11-23 21:31:19,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:19,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:19,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:19,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:19,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:19,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819395118] [2023-11-23 21:31:19,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819395118] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:19,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:19,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 21:31:19,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062769724] [2023-11-23 21:31:19,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:19,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:31:19,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:19,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:31:19,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:31:19,184 INFO L87 Difference]: Start difference. First operand 184 states and 446 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:19,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:19,231 INFO L93 Difference]: Finished difference Result 171 states and 420 transitions. [2023-11-23 21:31:19,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:31:19,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-23 21:31:19,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:19,234 INFO L225 Difference]: With dead ends: 171 [2023-11-23 21:31:19,234 INFO L226 Difference]: Without dead ends: 171 [2023-11-23 21:31:19,235 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 [2023-11-23 21:31:19,246 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:19,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 10 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:31:19,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-11-23 21:31:19,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2023-11-23 21:31:19,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.4705882352941178) internal successors, (420), 170 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:19,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 420 transitions. [2023-11-23 21:31:19,271 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 420 transitions. Word has length 5 [2023-11-23 21:31:19,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:19,271 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 420 transitions. [2023-11-23 21:31:19,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:19,272 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 420 transitions. [2023-11-23 21:31:19,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-23 21:31:19,274 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:19,275 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:19,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:31:19,275 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-23 21:31:19,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:19,276 INFO L85 PathProgramCache]: Analyzing trace with hash 2142330942, now seen corresponding path program 1 times [2023-11-23 21:31:19,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:19,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298524965] [2023-11-23 21:31:19,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:19,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:19,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:19,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:19,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:19,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298524965] [2023-11-23 21:31:19,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298524965] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:19,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:19,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:31:19,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351500746] [2023-11-23 21:31:19,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:19,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:31:19,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:19,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:31:19,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:31:19,667 INFO L87 Difference]: Start difference. First operand 171 states and 420 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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) [2023-11-23 21:31:19,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:19,807 INFO L93 Difference]: Finished difference Result 279 states and 702 transitions. [2023-11-23 21:31:19,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:31:19,808 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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 20 [2023-11-23 21:31:19,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:19,812 INFO L225 Difference]: With dead ends: 279 [2023-11-23 21:31:19,812 INFO L226 Difference]: Without dead ends: 279 [2023-11-23 21:31:19,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:31:19,813 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 37 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:19,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 35 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:31:19,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2023-11-23 21:31:19,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 213. [2023-11-23 21:31:19,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.5) internal successors, (530), 212 states have internal predecessors, (530), 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) [2023-11-23 21:31:19,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 530 transitions. [2023-11-23 21:31:19,833 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 530 transitions. Word has length 20 [2023-11-23 21:31:19,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:19,834 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 530 transitions. [2023-11-23 21:31:19,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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) [2023-11-23 21:31:19,835 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 530 transitions. [2023-11-23 21:31:19,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-23 21:31:19,844 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:19,845 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:19,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:31:19,846 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-23 21:31:19,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:19,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1464331558, now seen corresponding path program 1 times [2023-11-23 21:31:19,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:19,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876601735] [2023-11-23 21:31:19,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:19,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:19,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:20,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:31:20,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:20,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876601735] [2023-11-23 21:31:20,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876601735] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:20,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:20,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:31:20,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655600541] [2023-11-23 21:31:20,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:20,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:31:20,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:20,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:31:20,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:31:20,127 INFO L87 Difference]: Start difference. First operand 213 states and 530 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 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) [2023-11-23 21:31:20,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:20,223 INFO L93 Difference]: Finished difference Result 291 states and 730 transitions. [2023-11-23 21:31:20,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:31:20,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 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 23 [2023-11-23 21:31:20,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:20,227 INFO L225 Difference]: With dead ends: 291 [2023-11-23 21:31:20,227 INFO L226 Difference]: Without dead ends: 291 [2023-11-23 21:31:20,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:31:20,230 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 23 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:20,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 31 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:31:20,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2023-11-23 21:31:20,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 225. [2023-11-23 21:31:20,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.5) internal successors, (560), 224 states have internal predecessors, (560), 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) [2023-11-23 21:31:20,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 560 transitions. [2023-11-23 21:31:20,244 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 560 transitions. Word has length 23 [2023-11-23 21:31:20,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:20,245 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 560 transitions. [2023-11-23 21:31:20,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 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) [2023-11-23 21:31:20,246 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 560 transitions. [2023-11-23 21:31:20,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-23 21:31:20,247 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:20,247 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:20,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:31:20,248 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-23 21:31:20,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:20,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1295799111, now seen corresponding path program 1 times [2023-11-23 21:31:20,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:20,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259451266] [2023-11-23 21:31:20,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:20,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:20,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:21,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:21,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:21,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259451266] [2023-11-23 21:31:21,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259451266] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:31:21,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863320686] [2023-11-23 21:31:21,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:21,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:21,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946784d8-0ead-4ae0-82a7-07d058007ab2/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:21,292 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946784d8-0ead-4ae0-82a7-07d058007ab2/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:31:21,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946784d8-0ead-4ae0-82a7-07d058007ab2/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:31:21,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:21,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-23 21:31:21,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:22,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:22,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:31:22,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:22,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863320686] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 21:31:22,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:31:22,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 7] total 17 [2023-11-23 21:31:22,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662346458] [2023-11-23 21:31:22,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:22,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:31:22,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:22,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:31:22,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2023-11-23 21:31:22,825 INFO L87 Difference]: Start difference. First operand 225 states and 560 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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) [2023-11-23 21:31:23,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:23,546 INFO L93 Difference]: Finished difference Result 502 states and 1267 transitions. [2023-11-23 21:31:23,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-23 21:31:23,547 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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 24 [2023-11-23 21:31:23,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:23,552 INFO L225 Difference]: With dead ends: 502 [2023-11-23 21:31:23,552 INFO L226 Difference]: Without dead ends: 471 [2023-11-23 21:31:23,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2023-11-23 21:31:23,553 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 147 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:23,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 118 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:31:23,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-11-23 21:31:23,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 279. [2023-11-23 21:31:23,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.5431654676258995) internal successors, (707), 278 states have internal predecessors, (707), 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) [2023-11-23 21:31:23,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 707 transitions. [2023-11-23 21:31:23,588 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 707 transitions. Word has length 24 [2023-11-23 21:31:23,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:23,588 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 707 transitions. [2023-11-23 21:31:23,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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) [2023-11-23 21:31:23,589 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 707 transitions. [2023-11-23 21:31:23,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-23 21:31:23,590 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:23,590 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:23,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946784d8-0ead-4ae0-82a7-07d058007ab2/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:23,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946784d8-0ead-4ae0-82a7-07d058007ab2/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-23 21:31:23,810 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-23 21:31:23,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:23,811 INFO L85 PathProgramCache]: Analyzing trace with hash -420172887, now seen corresponding path program 2 times [2023-11-23 21:31:23,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:23,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297341880] [2023-11-23 21:31:23,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:23,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:23,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:24,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:24,043 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:24,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297341880] [2023-11-23 21:31:24,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297341880] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:24,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:24,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:31:24,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998291428] [2023-11-23 21:31:24,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:24,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:31:24,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:24,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:31:24,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:31:24,046 INFO L87 Difference]: Start difference. First operand 279 states and 707 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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) [2023-11-23 21:31:24,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:24,139 INFO L93 Difference]: Finished difference Result 369 states and 958 transitions. [2023-11-23 21:31:24,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:31:24,140 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 24 [2023-11-23 21:31:24,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:24,144 INFO L225 Difference]: With dead ends: 369 [2023-11-23 21:31:24,144 INFO L226 Difference]: Without dead ends: 369 [2023-11-23 21:31:24,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:31:24,146 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 27 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:24,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 33 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:31:24,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2023-11-23 21:31:24,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 267. [2023-11-23 21:31:24,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.575187969924812) internal successors, (685), 266 states have internal predecessors, (685), 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) [2023-11-23 21:31:24,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 685 transitions. [2023-11-23 21:31:24,167 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 685 transitions. Word has length 24 [2023-11-23 21:31:24,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:24,167 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 685 transitions. [2023-11-23 21:31:24,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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) [2023-11-23 21:31:24,168 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 685 transitions. [2023-11-23 21:31:24,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-23 21:31:24,169 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:24,171 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:24,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:31:24,171 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-23 21:31:24,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:24,172 INFO L85 PathProgramCache]: Analyzing trace with hash -692398961, now seen corresponding path program 1 times [2023-11-23 21:31:24,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:24,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924091440] [2023-11-23 21:31:24,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:24,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:24,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:25,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:25,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:25,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924091440] [2023-11-23 21:31:25,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924091440] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:31:25,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261175018] [2023-11-23 21:31:25,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:25,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:25,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946784d8-0ead-4ae0-82a7-07d058007ab2/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:25,450 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946784d8-0ead-4ae0-82a7-07d058007ab2/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:31:25,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946784d8-0ead-4ae0-82a7-07d058007ab2/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:31:25,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:25,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-23 21:31:25,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:26,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:26,476 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:31:28,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:28,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261175018] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:31:28,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [749962813] [2023-11-23 21:31:28,184 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-23 21:31:28,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:31:28,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2023-11-23 21:31:28,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100454521] [2023-11-23 21:31:28,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:31:28,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-23 21:31:28,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:28,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-23 21:31:28,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2023-11-23 21:31:28,189 INFO L87 Difference]: Start difference. First operand 267 states and 685 transitions. Second operand has 24 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 23 states have internal predecessors, (79), 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) [2023-11-23 21:31:43,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:43,461 INFO L93 Difference]: Finished difference Result 1472 states and 3595 transitions. [2023-11-23 21:31:43,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2023-11-23 21:31:43,462 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 23 states have internal predecessors, (79), 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 27 [2023-11-23 21:31:43,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:43,472 INFO L225 Difference]: With dead ends: 1472 [2023-11-23 21:31:43,472 INFO L226 Difference]: Without dead ends: 1074 [2023-11-23 21:31:43,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3399 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=1682, Invalid=8620, Unknown=0, NotChecked=0, Total=10302 [2023-11-23 21:31:43,479 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 642 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 2035 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 2105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 2035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:43,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [642 Valid, 794 Invalid, 2105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 2035 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-11-23 21:31:43,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2023-11-23 21:31:43,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 546. [2023-11-23 21:31:43,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 545 states have (on average 2.6532110091743117) internal successors, (1446), 545 states have internal predecessors, (1446), 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) [2023-11-23 21:31:43,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 1446 transitions. [2023-11-23 21:31:43,514 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 1446 transitions. Word has length 27 [2023-11-23 21:31:43,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:43,514 INFO L495 AbstractCegarLoop]: Abstraction has 546 states and 1446 transitions. [2023-11-23 21:31:43,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 23 states have internal predecessors, (79), 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) [2023-11-23 21:31:43,515 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 1446 transitions. [2023-11-23 21:31:43,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-23 21:31:43,518 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:43,518 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:43,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946784d8-0ead-4ae0-82a7-07d058007ab2/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:43,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946784d8-0ead-4ae0-82a7-07d058007ab2/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-23 21:31:43,744 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-23 21:31:43,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:43,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1357548305, now seen corresponding path program 2 times [2023-11-23 21:31:43,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:43,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63603842] [2023-11-23 21:31:43,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:43,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:43,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:45,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:45,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:45,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63603842] [2023-11-23 21:31:45,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63603842] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:31:45,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465214284] [2023-11-23 21:31:45,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:31:45,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:45,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946784d8-0ead-4ae0-82a7-07d058007ab2/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:45,657 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946784d8-0ead-4ae0-82a7-07d058007ab2/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:31:45,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_946784d8-0ead-4ae0-82a7-07d058007ab2/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:31:45,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-23 21:31:45,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:31:45,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-23 21:31:45,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:48,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:48,990 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:31:51,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:51,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465214284] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:31:51,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [309588664] [2023-11-23 21:31:51,035 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-23 21:31:51,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:31:51,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 26 [2023-11-23 21:31:51,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784220225] [2023-11-23 21:31:51,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:31:51,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-23 21:31:51,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:51,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-23 21:31:51,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=551, Unknown=1, NotChecked=0, Total=702 [2023-11-23 21:31:51,040 INFO L87 Difference]: Start difference. First operand 546 states and 1446 transitions. Second operand has 27 states, 27 states have (on average 3.037037037037037) internal successors, (82), 26 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)