./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_db4eafb4-bbd6-4931-a5aa-bea7c2109a41/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4eafb4-bbd6-4931-a5aa-bea7c2109a41/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4eafb4-bbd6-4931-a5aa-bea7c2109a41/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4eafb4-bbd6-4931-a5aa-bea7c2109a41/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4eafb4-bbd6-4931-a5aa-bea7c2109a41/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4eafb4-bbd6-4931-a5aa-bea7c2109a41/bin/utaipan-verify-DbMuA5NWw2 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:35:29,853 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:35:29,962 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4eafb4-bbd6-4931-a5aa-bea7c2109a41/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:35:29,970 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:35:29,972 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:35:30,006 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:35:30,007 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:35:30,008 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:35:30,009 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:35:30,011 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:35:30,011 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:35:30,012 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:35:30,012 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:35:30,012 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:35:30,013 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:35:30,015 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:35:30,016 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:35:30,016 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:35:30,016 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:35:30,017 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:35:30,021 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:35:30,021 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:35:30,022 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:35:30,022 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:35:30,023 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:35:30,023 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:35:30,023 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:35:30,023 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:35:30,024 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:35:30,024 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:35:30,024 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:35:30,025 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:35:30,026 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:35:30,027 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:35:30,027 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:35:30,028 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:35:30,028 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:35:30,028 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:35:30,029 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:35:30,029 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:35:30,029 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:35:30,030 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:35:30,030 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:35:30,030 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:35:30,031 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:35:30,031 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:35:30,031 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:35:30,032 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_db4eafb4-bbd6-4931-a5aa-bea7c2109a41/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4eafb4-bbd6-4931-a5aa-bea7c2109a41/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 [2024-11-02 12:35:30,368 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:35:30,393 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:35:30,397 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:35:30,399 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:35:30,400 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:35:30,401 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4eafb4-bbd6-4931-a5aa-bea7c2109a41/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c Unable to find full path for "g++" [2024-11-02 12:35:32,459 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:35:32,654 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:35:32,654 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4eafb4-bbd6-4931-a5aa-bea7c2109a41/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2024-11-02 12:35:32,666 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4eafb4-bbd6-4931-a5aa-bea7c2109a41/bin/utaipan-verify-DbMuA5NWw2/data/e7b1d2a69/755ba016d78e4183b63fa3b6cb5795f8/FLAGa39cc2362 [2024-11-02 12:35:32,682 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4eafb4-bbd6-4931-a5aa-bea7c2109a41/bin/utaipan-verify-DbMuA5NWw2/data/e7b1d2a69/755ba016d78e4183b63fa3b6cb5795f8 [2024-11-02 12:35:32,684 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:35:32,686 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:35:32,687 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:35:32,688 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:35:32,693 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:35:32,694 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:35:32" (1/1) ... [2024-11-02 12:35:32,696 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66a0dcb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:32, skipping insertion in model container [2024-11-02 12:35:32,696 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:35:32" (1/1) ... [2024-11-02 12:35:32,722 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:35:33,049 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4eafb4-bbd6-4931-a5aa-bea7c2109a41/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c[2676,2689] [2024-11-02 12:35:33,063 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:35:33,080 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:35:33,104 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4eafb4-bbd6-4931-a5aa-bea7c2109a41/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c[2676,2689] [2024-11-02 12:35:33,108 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:35:33,133 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:35:33,134 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:33 WrapperNode [2024-11-02 12:35:33,134 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:35:33,135 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:35:33,136 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:35:33,136 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:35:33,145 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:33" (1/1) ... [2024-11-02 12:35:33,157 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:33" (1/1) ... [2024-11-02 12:35:33,191 INFO L138 Inliner]: procedures = 23, calls = 27, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 139 [2024-11-02 12:35:33,194 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:35:33,195 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:35:33,195 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:35:33,196 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:35:33,204 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:33" (1/1) ... [2024-11-02 12:35:33,204 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:33" (1/1) ... [2024-11-02 12:35:33,207 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:33" (1/1) ... [2024-11-02 12:35:33,207 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:33" (1/1) ... [2024-11-02 12:35:33,214 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:33" (1/1) ... [2024-11-02 12:35:33,218 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:33" (1/1) ... [2024-11-02 12:35:33,220 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:33" (1/1) ... [2024-11-02 12:35:33,222 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:33" (1/1) ... [2024-11-02 12:35:33,224 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:35:33,225 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:35:33,226 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:35:33,226 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:35:33,227 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:33" (1/1) ... [2024-11-02 12:35:33,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:35:33,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4eafb4-bbd6-4931-a5aa-bea7c2109a41/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:35:33,261 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4eafb4-bbd6-4931-a5aa-bea7c2109a41/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:35:33,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4eafb4-bbd6-4931-a5aa-bea7c2109a41/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:35:33,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:35:33,301 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-02 12:35:33,301 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-02 12:35:33,301 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-02 12:35:33,302 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-02 12:35:33,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:35:33,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-02 12:35:33,302 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-02 12:35:33,302 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-02 12:35:33,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-02 12:35:33,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:35:33,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:35:33,303 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-02 12:35:33,305 WARN L207 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-02 12:35:33,442 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:35:33,445 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:35:33,746 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-02 12:35:33,746 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:35:34,052 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:35:34,053 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-02 12:35:34,056 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:35:34 BoogieIcfgContainer [2024-11-02 12:35:34,056 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:35:34,059 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:35:34,062 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:35:34,065 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:35:34,065 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:35:32" (1/3) ... [2024-11-02 12:35:34,066 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20a16aef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:35:34, skipping insertion in model container [2024-11-02 12:35:34,066 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:35:33" (2/3) ... [2024-11-02 12:35:34,067 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20a16aef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:35:34, skipping insertion in model container [2024-11-02 12:35:34,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:35:34" (3/3) ... [2024-11-02 12:35:34,068 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2024-11-02 12:35:34,085 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:35:34,085 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 12:35:34,085 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-02 12:35:34,166 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-02 12:35:34,217 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 32 transitions, 78 flow [2024-11-02 12:35:34,260 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 135 states, 134 states have (on average 2.7238805970149254) internal successors, (365), 134 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:35:34,298 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:35:34,306 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@ab9bc80, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:35:34,307 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-02 12:35:34,311 INFO L276 IsEmpty]: Start isEmpty. Operand has 135 states, 134 states have (on average 2.7238805970149254) internal successors, (365), 134 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:35:34,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-02 12:35:34,324 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:35:34,325 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:35:34,325 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-02 12:35:34,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:35:34,332 INFO L85 PathProgramCache]: Analyzing trace with hash 993627968, now seen corresponding path program 1 times [2024-11-02 12:35:34,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:35:34,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85771825] [2024-11-02 12:35:34,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:35:34,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:35:34,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:35:34,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:35:34,608 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:35:34,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85771825] [2024-11-02 12:35:34,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85771825] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:35:34,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:35:34,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:35:34,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259056200] [2024-11-02 12:35:34,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:35:34,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-02 12:35:34,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:35:34,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-02 12:35:34,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-02 12:35:34,652 INFO L87 Difference]: Start difference. First operand has 135 states, 134 states have (on average 2.7238805970149254) internal successors, (365), 134 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:35:34,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:35:34,728 INFO L93 Difference]: Finished difference Result 203 states and 514 transitions. [2024-11-02 12:35:34,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-02 12:35:34,732 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-02 12:35:34,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:35:34,744 INFO L225 Difference]: With dead ends: 203 [2024-11-02 12:35:34,745 INFO L226 Difference]: Without dead ends: 135 [2024-11-02 12:35:34,748 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-02 12:35:34,752 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:35:34,753 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 5 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:35:34,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-11-02 12:35:34,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2024-11-02 12:35:34,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.4776119402985075) internal successors, (332), 134 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:35:34,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 332 transitions. [2024-11-02 12:35:34,806 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 332 transitions. Word has length 16 [2024-11-02 12:35:34,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:35:34,807 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 332 transitions. [2024-11-02 12:35:34,808 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:35:34,808 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 332 transitions. [2024-11-02 12:35:34,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-02 12:35:34,810 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:35:34,810 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:35:34,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:35:34,811 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-02 12:35:34,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:35:34,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1637353301, now seen corresponding path program 1 times [2024-11-02 12:35:34,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:35:34,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521525137] [2024-11-02 12:35:34,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:35:34,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:35:34,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:35:35,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:35:35,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:35:35,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521525137] [2024-11-02 12:35:35,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521525137] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:35:35,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:35:35,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:35:35,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359482789] [2024-11-02 12:35:35,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:35:35,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:35:35,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:35:35,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:35:35,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:35:35,031 INFO L87 Difference]: Start difference. First operand 135 states and 332 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:35:35,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:35:35,143 INFO L93 Difference]: Finished difference Result 247 states and 609 transitions. [2024-11-02 12:35:35,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:35:35,144 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 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 18 [2024-11-02 12:35:35,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:35:35,147 INFO L225 Difference]: With dead ends: 247 [2024-11-02 12:35:35,148 INFO L226 Difference]: Without dead ends: 195 [2024-11-02 12:35:35,149 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:35:35,150 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:35:35,151 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 9 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:35:35,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2024-11-02 12:35:35,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 175. [2024-11-02 12:35:35,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.4942528735632186) internal successors, (434), 174 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:35:35,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 434 transitions. [2024-11-02 12:35:35,187 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 434 transitions. Word has length 18 [2024-11-02 12:35:35,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:35:35,188 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 434 transitions. [2024-11-02 12:35:35,189 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:35:35,189 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 434 transitions. [2024-11-02 12:35:35,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-02 12:35:35,191 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:35:35,191 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:35:35,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 12:35:35,191 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-02 12:35:35,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:35:35,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1872687130, now seen corresponding path program 1 times [2024-11-02 12:35:35,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:35:35,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71259526] [2024-11-02 12:35:35,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:35:35,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:35:35,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:35:35,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:35:35,366 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:35:35,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71259526] [2024-11-02 12:35:35,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71259526] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:35:35,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:35:35,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:35:35,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587831278] [2024-11-02 12:35:35,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:35:35,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:35:35,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:35:35,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:35:35,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:35:35,373 INFO L87 Difference]: Start difference. First operand 175 states and 434 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:35:35,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:35:35,501 INFO L93 Difference]: Finished difference Result 326 states and 821 transitions. [2024-11-02 12:35:35,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:35:35,502 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-02 12:35:35,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:35:35,505 INFO L225 Difference]: With dead ends: 326 [2024-11-02 12:35:35,508 INFO L226 Difference]: Without dead ends: 198 [2024-11-02 12:35:35,509 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:35:35,510 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:35:35,511 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 10 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:35:35,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2024-11-02 12:35:35,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2024-11-02 12:35:35,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.487309644670051) internal successors, (490), 197 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:35:35,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 490 transitions. [2024-11-02 12:35:35,540 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 490 transitions. Word has length 21 [2024-11-02 12:35:35,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:35:35,540 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 490 transitions. [2024-11-02 12:35:35,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:35:35,541 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 490 transitions. [2024-11-02 12:35:35,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-02 12:35:35,543 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:35:35,543 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:35:35,543 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 12:35:35,543 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-02 12:35:35,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:35:35,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1612782498, now seen corresponding path program 1 times [2024-11-02 12:35:35,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:35:35,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127566002] [2024-11-02 12:35:35,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:35:35,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:35:35,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:35:35,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:35:35,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:35:35,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127566002] [2024-11-02 12:35:35,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127566002] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:35:35,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:35:35,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:35:35,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52492207] [2024-11-02 12:35:35,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:35:35,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:35:35,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:35:35,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:35:35,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:35:35,843 INFO L87 Difference]: Start difference. First operand 198 states and 490 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:35:35,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:35:35,999 INFO L93 Difference]: Finished difference Result 395 states and 979 transitions. [2024-11-02 12:35:35,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:35:36,000 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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 26 [2024-11-02 12:35:36,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:35:36,002 INFO L225 Difference]: With dead ends: 395 [2024-11-02 12:35:36,003 INFO L226 Difference]: Without dead ends: 199 [2024-11-02 12:35:36,004 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:35:36,010 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:35:36,014 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 15 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:35:36,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2024-11-02 12:35:36,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2024-11-02 12:35:36,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.4797979797979797) internal successors, (491), 198 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:35:36,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 491 transitions. [2024-11-02 12:35:36,055 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 491 transitions. Word has length 26 [2024-11-02 12:35:36,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:35:36,056 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 491 transitions. [2024-11-02 12:35:36,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:35:36,056 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 491 transitions. [2024-11-02 12:35:36,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-02 12:35:36,062 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:35:36,062 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-02 12:35:36,062 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 12:35:36,063 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-02 12:35:36,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:35:36,064 INFO L85 PathProgramCache]: Analyzing trace with hash 725856253, now seen corresponding path program 1 times [2024-11-02 12:35:36,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:35:36,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001131763] [2024-11-02 12:35:36,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:35:36,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:35:36,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:35:37,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:35:37,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:35:37,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001131763] [2024-11-02 12:35:37,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001131763] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:35:37,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849390551] [2024-11-02 12:35:37,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:35:37,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:35:37,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4eafb4-bbd6-4931-a5aa-bea7c2109a41/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:35:37,444 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4eafb4-bbd6-4931-a5aa-bea7c2109a41/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:35:37,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4eafb4-bbd6-4931-a5aa-bea7c2109a41/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:35:37,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:35:37,557 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-02 12:35:37,564 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:35:37,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-02 12:35:38,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:35:38,188 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:35:39,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 55 [2024-11-02 12:35:39,193 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-02 12:35:39,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 68 [2024-11-02 12:35:39,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:35:39,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849390551] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:35:39,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1223743476] [2024-11-02 12:35:39,451 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:311) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:286) at java.base/java.util.stream.ForEachOps$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:251) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:118) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:90) 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:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) 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) [2024-11-02 12:35:39,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:35:39,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2024-11-02 12:35:39,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186667338] [2024-11-02 12:35:39,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:35:39,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-02 12:35:39,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:35:39,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-02 12:35:39,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2024-11-02 12:35:39,464 INFO L87 Difference]: Start difference. First operand 199 states and 491 transitions. Second operand has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:35:41,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:35:41,111 INFO L93 Difference]: Finished difference Result 1153 states and 2922 transitions. [2024-11-02 12:35:41,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-02 12:35:41,112 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 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 [2024-11-02 12:35:41,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:35:41,120 INFO L225 Difference]: With dead ends: 1153 [2024-11-02 12:35:41,120 INFO L226 Difference]: Without dead ends: 842 [2024-11-02 12:35:41,124 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2024-11-02 12:35:41,126 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 278 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-02 12:35:41,126 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 126 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-02 12:35:41,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2024-11-02 12:35:41,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 425. [2024-11-02 12:35:41,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 2.518867924528302) internal successors, (1068), 424 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:35:41,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 1068 transitions. [2024-11-02 12:35:41,218 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 1068 transitions. Word has length 27 [2024-11-02 12:35:41,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:35:41,219 INFO L471 AbstractCegarLoop]: Abstraction has 425 states and 1068 transitions. [2024-11-02 12:35:41,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:35:41,220 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 1068 transitions. [2024-11-02 12:35:41,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-02 12:35:41,222 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:35:41,222 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-02 12:35:41,248 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4eafb4-bbd6-4931-a5aa-bea7c2109a41/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-02 12:35:41,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4eafb4-bbd6-4931-a5aa-bea7c2109a41/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:35:41,424 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-02 12:35:41,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:35:41,428 INFO L85 PathProgramCache]: Analyzing trace with hash -581761321, now seen corresponding path program 1 times [2024-11-02 12:35:41,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:35:41,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745044099] [2024-11-02 12:35:41,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:35:41,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:35:41,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:35:41,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-02 12:35:41,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:35:41,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745044099] [2024-11-02 12:35:41,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745044099] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:35:41,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:35:41,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:35:41,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182242363] [2024-11-02 12:35:41,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:35:41,591 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:35:41,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:35:41,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:35:41,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:35:41,593 INFO L87 Difference]: Start difference. First operand 425 states and 1068 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:35:41,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:35:41,740 INFO L93 Difference]: Finished difference Result 715 states and 1807 transitions. [2024-11-02 12:35:41,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:35:41,741 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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 [2024-11-02 12:35:41,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:35:41,745 INFO L225 Difference]: With dead ends: 715 [2024-11-02 12:35:41,746 INFO L226 Difference]: Without dead ends: 376 [2024-11-02 12:35:41,747 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:35:41,748 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:35:41,749 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 6 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:35:41,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2024-11-02 12:35:41,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 329. [2024-11-02 12:35:41,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.432926829268293) internal successors, (798), 328 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:35:41,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 798 transitions. [2024-11-02 12:35:41,796 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 798 transitions. Word has length 27 [2024-11-02 12:35:41,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:35:41,796 INFO L471 AbstractCegarLoop]: Abstraction has 329 states and 798 transitions. [2024-11-02 12:35:41,797 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:35:41,797 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 798 transitions. [2024-11-02 12:35:41,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-02 12:35:41,798 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:35:41,799 INFO L215 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] [2024-11-02 12:35:41,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-02 12:35:41,799 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-02 12:35:41,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:35:41,800 INFO L85 PathProgramCache]: Analyzing trace with hash -999053566, now seen corresponding path program 2 times [2024-11-02 12:35:41,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:35:41,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905652281] [2024-11-02 12:35:41,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:35:41,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:35:41,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:35:43,058 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:35:43,059 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:35:43,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905652281] [2024-11-02 12:35:43,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905652281] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:35:43,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447302647] [2024-11-02 12:35:43,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:35:43,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:35:43,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4eafb4-bbd6-4931-a5aa-bea7c2109a41/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:35:43,063 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4eafb4-bbd6-4931-a5aa-bea7c2109a41/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:35:43,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4eafb4-bbd6-4931-a5aa-bea7c2109a41/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:35:43,177 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-02 12:35:43,177 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:35:43,180 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-02 12:35:43,182 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:35:43,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:35:43,525 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:35:43,659 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-02 12:35:43,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2024-11-02 12:35:44,101 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:35:44,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447302647] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:35:44,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [380125687] [2024-11-02 12:35:44,103 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:311) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:286) at java.base/java.util.stream.ForEachOps$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:251) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:118) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:90) 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:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) 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) [2024-11-02 12:35:44,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:35:44,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2024-11-02 12:35:44,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572362667] [2024-11-02 12:35:44,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:35:44,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-02 12:35:44,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:35:44,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-02 12:35:44,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2024-11-02 12:35:44,107 INFO L87 Difference]: Start difference. First operand 329 states and 798 transitions. Second operand has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:35:45,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:35:45,052 INFO L93 Difference]: Finished difference Result 598 states and 1465 transitions. [2024-11-02 12:35:45,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-02 12:35:45,054 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 states have internal predecessors, (72), 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 28 [2024-11-02 12:35:45,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:35:45,059 INFO L225 Difference]: With dead ends: 598 [2024-11-02 12:35:45,060 INFO L226 Difference]: Without dead ends: 555 [2024-11-02 12:35:45,061 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2024-11-02 12:35:45,062 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-02 12:35:45,063 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 94 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-02 12:35:45,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2024-11-02 12:35:45,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 329. [2024-11-02 12:35:45,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.432926829268293) internal successors, (798), 328 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:35:45,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 798 transitions. [2024-11-02 12:35:45,130 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 798 transitions. Word has length 28 [2024-11-02 12:35:45,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:35:45,133 INFO L471 AbstractCegarLoop]: Abstraction has 329 states and 798 transitions. [2024-11-02 12:35:45,133 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:35:45,133 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 798 transitions. [2024-11-02 12:35:45,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-02 12:35:45,135 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:35:45,135 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:35:45,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4eafb4-bbd6-4931-a5aa-bea7c2109a41/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-02 12:35:45,336 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4eafb4-bbd6-4931-a5aa-bea7c2109a41/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:35:45,336 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-02 12:35:45,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:35:45,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1554419755, now seen corresponding path program 3 times [2024-11-02 12:35:45,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:35:45,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630093425] [2024-11-02 12:35:45,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:35:45,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:35:45,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:35:45,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-02 12:35:45,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:35:45,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630093425] [2024-11-02 12:35:45,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630093425] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:35:45,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:35:45,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:35:45,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144780392] [2024-11-02 12:35:45,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:35:45,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:35:45,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:35:45,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:35:45,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:35:45,460 INFO L87 Difference]: Start difference. First operand 329 states and 798 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:35:45,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:35:45,721 INFO L93 Difference]: Finished difference Result 882 states and 2206 transitions. [2024-11-02 12:35:45,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:35:45,722 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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 31 [2024-11-02 12:35:45,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:35:45,728 INFO L225 Difference]: With dead ends: 882 [2024-11-02 12:35:45,728 INFO L226 Difference]: Without dead ends: 703 [2024-11-02 12:35:45,729 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:35:45,730 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 27 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:35:45,731 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 23 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:35:45,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2024-11-02 12:35:45,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 595. [2024-11-02 12:35:45,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 2.5235690235690234) internal successors, (1499), 594 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:35:45,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1499 transitions. [2024-11-02 12:35:45,826 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1499 transitions. Word has length 31 [2024-11-02 12:35:45,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:35:45,827 INFO L471 AbstractCegarLoop]: Abstraction has 595 states and 1499 transitions. [2024-11-02 12:35:45,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:35:45,827 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1499 transitions. [2024-11-02 12:35:45,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-02 12:35:45,829 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:35:45,830 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:35:45,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-02 12:35:45,830 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-02 12:35:45,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:35:45,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1604614929, now seen corresponding path program 4 times [2024-11-02 12:35:45,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:35:45,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338281348] [2024-11-02 12:35:45,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:35:45,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:35:45,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:35:46,037 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-02 12:35:46,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:35:46,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338281348] [2024-11-02 12:35:46,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338281348] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:35:46,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:35:46,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:35:46,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128012631] [2024-11-02 12:35:46,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:35:46,039 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:35:46,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:35:46,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:35:46,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:35:46,041 INFO L87 Difference]: Start difference. First operand 595 states and 1499 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:35:46,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:35:46,287 INFO L93 Difference]: Finished difference Result 1253 states and 3250 transitions. [2024-11-02 12:35:46,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:35:46,288 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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 36 [2024-11-02 12:35:46,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:35:46,294 INFO L225 Difference]: With dead ends: 1253 [2024-11-02 12:35:46,295 INFO L226 Difference]: Without dead ends: 810 [2024-11-02 12:35:46,296 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:35:46,298 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 26 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:35:46,299 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 11 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:35:46,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2024-11-02 12:35:46,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 733. [2024-11-02 12:35:46,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 732 states have (on average 2.4945355191256833) internal successors, (1826), 732 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:35:46,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 1826 transitions. [2024-11-02 12:35:46,430 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 1826 transitions. Word has length 36 [2024-11-02 12:35:46,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:35:46,431 INFO L471 AbstractCegarLoop]: Abstraction has 733 states and 1826 transitions. [2024-11-02 12:35:46,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:35:46,431 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 1826 transitions. [2024-11-02 12:35:46,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-02 12:35:46,434 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:35:46,434 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:35:46,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-02 12:35:46,435 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-02 12:35:46,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:35:46,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1891390735, now seen corresponding path program 1 times [2024-11-02 12:35:46,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:35:46,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593208402] [2024-11-02 12:35:46,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:35:46,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:35:46,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:35:48,079 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:35:48,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:35:48,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593208402] [2024-11-02 12:35:48,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593208402] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:35:48,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656822513] [2024-11-02 12:35:48,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:35:48,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:35:48,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4eafb4-bbd6-4931-a5aa-bea7c2109a41/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:35:48,082 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4eafb4-bbd6-4931-a5aa-bea7c2109a41/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:35:48,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4eafb4-bbd6-4931-a5aa-bea7c2109a41/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 12:35:48,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:35:48,181 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-02 12:35:48,184 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:35:48,804 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:35:48,804 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:35:49,467 INFO L349 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2024-11-02 12:35:49,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 50 [2024-11-02 12:35:49,951 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:35:49,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656822513] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:35:49,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1244938852] [2024-11-02 12:35:49,953 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:311) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:286) at java.base/java.util.stream.ForEachOps$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:251) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:118) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:90) 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:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) 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) [2024-11-02 12:35:49,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:35:49,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 28 [2024-11-02 12:35:49,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683624888] [2024-11-02 12:35:49,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:35:49,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-02 12:35:49,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:35:49,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-02 12:35:49,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2024-11-02 12:35:49,956 INFO L87 Difference]: Start difference. First operand 733 states and 1826 transitions. Second operand has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:35:54,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:35:54,789 INFO L93 Difference]: Finished difference Result 4456 states and 11145 transitions. [2024-11-02 12:35:54,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-02 12:35:54,790 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 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 36 [2024-11-02 12:35:54,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:35:54,813 INFO L225 Difference]: With dead ends: 4456 [2024-11-02 12:35:54,813 INFO L226 Difference]: Without dead ends: 3256 [2024-11-02 12:35:54,818 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=909, Invalid=3123, Unknown=0, NotChecked=0, Total=4032 [2024-11-02 12:35:54,819 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 450 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 1729 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:35:54,820 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 363 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1729 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-02 12:35:54,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3256 states. [2024-11-02 12:35:55,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3256 to 1445. [2024-11-02 12:35:55,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1444 states have (on average 2.585872576177285) internal successors, (3734), 1444 states have internal predecessors, (3734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:35:55,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 3734 transitions. [2024-11-02 12:35:55,212 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 3734 transitions. Word has length 36 [2024-11-02 12:35:55,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:35:55,212 INFO L471 AbstractCegarLoop]: Abstraction has 1445 states and 3734 transitions. [2024-11-02 12:35:55,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:35:55,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 3734 transitions. [2024-11-02 12:35:55,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-02 12:35:55,217 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:35:55,217 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:35:55,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4eafb4-bbd6-4931-a5aa-bea7c2109a41/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-02 12:35:55,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4eafb4-bbd6-4931-a5aa-bea7c2109a41/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-02 12:35:55,421 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-02 12:35:55,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:35:55,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1406491435, now seen corresponding path program 2 times [2024-11-02 12:35:55,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:35:55,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722749931] [2024-11-02 12:35:55,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:35:55,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:35:55,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:35:56,825 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:35:56,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:35:56,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722749931] [2024-11-02 12:35:56,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722749931] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:35:56,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052209564] [2024-11-02 12:35:56,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:35:56,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:35:56,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4eafb4-bbd6-4931-a5aa-bea7c2109a41/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:35:56,828 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4eafb4-bbd6-4931-a5aa-bea7c2109a41/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:35:56,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4eafb4-bbd6-4931-a5aa-bea7c2109a41/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 12:35:57,104 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-02 12:35:57,104 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:35:57,108 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-02 12:35:57,113 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:35:57,994 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:35:57,995 INFO L311 TraceCheckSpWp]: Computing backward predicates...