./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b17d7631-9320-43f1-ae51-1a60c2d3e6cc/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b17d7631-9320-43f1-ae51-1a60c2d3e6cc/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_b17d7631-9320-43f1-ae51-1a60c2d3e6cc/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b17d7631-9320-43f1-ae51-1a60c2d3e6cc/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b17d7631-9320-43f1-ae51-1a60c2d3e6cc/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_b17d7631-9320-43f1-ae51-1a60c2d3e6cc/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 362ca5c35cce683744d8d619a442f154ce469608d45ae43ff282ddf886694959 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:29:57,073 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:29:57,162 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b17d7631-9320-43f1-ae51-1a60c2d3e6cc/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:29:57,169 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:29:57,169 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:29:57,207 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:29:57,208 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:29:57,209 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:29:57,209 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:29:57,211 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:29:57,211 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:29:57,212 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:29:57,212 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:29:57,212 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:29:57,213 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:29:57,215 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:29:57,215 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:29:57,215 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:29:57,216 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:29:57,216 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:29:57,216 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:29:57,221 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:29:57,221 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:29:57,222 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:29:57,222 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:29:57,222 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:29:57,222 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:29:57,223 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:29:57,223 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:29:57,223 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:29:57,223 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:29:57,224 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:29:57,224 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:29:57,224 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:29:57,225 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:29:57,226 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:29:57,226 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:29:57,226 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:29:57,227 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:29:57,228 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:29:57,228 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:29:57,228 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:29:57,229 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:29:57,229 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:29:57,229 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:29:57,229 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:29:57,229 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:29:57,230 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_b17d7631-9320-43f1-ae51-1a60c2d3e6cc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b17d7631-9320-43f1-ae51-1a60c2d3e6cc/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 362ca5c35cce683744d8d619a442f154ce469608d45ae43ff282ddf886694959 [2024-11-02 12:29:57,491 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:29:57,514 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:29:57,518 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:29:57,520 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:29:57,520 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:29:57,522 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b17d7631-9320-43f1-ae51-1a60c2d3e6cc/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c Unable to find full path for "g++" [2024-11-02 12:29:59,493 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:29:59,718 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:29:59,719 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b17d7631-9320-43f1-ae51-1a60c2d3e6cc/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2024-11-02 12:29:59,731 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b17d7631-9320-43f1-ae51-1a60c2d3e6cc/bin/utaipan-verify-DbMuA5NWw2/data/716216249/02b6d0d8c6ec4fa08560c3aa0d57f66a/FLAG4152f1832 [2024-11-02 12:29:59,746 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b17d7631-9320-43f1-ae51-1a60c2d3e6cc/bin/utaipan-verify-DbMuA5NWw2/data/716216249/02b6d0d8c6ec4fa08560c3aa0d57f66a [2024-11-02 12:29:59,749 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:29:59,751 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:29:59,752 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:29:59,753 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:29:59,758 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:29:59,759 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:29:59" (1/1) ... [2024-11-02 12:29:59,760 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@214a878d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:29:59, skipping insertion in model container [2024-11-02 12:29:59,760 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:29:59" (1/1) ... [2024-11-02 12:29:59,788 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:30:00,019 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_b17d7631-9320-43f1-ae51-1a60c2d3e6cc/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c[4827,4840] [2024-11-02 12:30:00,036 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:30:00,050 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:30:00,083 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_b17d7631-9320-43f1-ae51-1a60c2d3e6cc/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c[4827,4840] [2024-11-02 12:30:00,089 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:30:00,113 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:30:00,114 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:30:00 WrapperNode [2024-11-02 12:30:00,114 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:30:00,115 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:30:00,115 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:30:00,115 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:30:00,124 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:30:00" (1/1) ... [2024-11-02 12:30:00,135 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:30:00" (1/1) ... [2024-11-02 12:30:00,169 INFO L138 Inliner]: procedures = 25, calls = 29, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 304 [2024-11-02 12:30:00,170 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:30:00,170 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:30:00,171 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:30:00,171 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:30:00,181 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:30:00" (1/1) ... [2024-11-02 12:30:00,182 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:30:00" (1/1) ... [2024-11-02 12:30:00,189 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:30:00" (1/1) ... [2024-11-02 12:30:00,190 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:30:00" (1/1) ... [2024-11-02 12:30:00,204 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:30:00" (1/1) ... [2024-11-02 12:30:00,209 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:30:00" (1/1) ... [2024-11-02 12:30:00,212 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:30:00" (1/1) ... [2024-11-02 12:30:00,214 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:30:00" (1/1) ... [2024-11-02 12:30:00,218 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:30:00,219 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:30:00,219 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:30:00,219 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:30:00,220 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:30:00" (1/1) ... [2024-11-02 12:30:00,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:30:00,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b17d7631-9320-43f1-ae51-1a60c2d3e6cc/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:30:00,270 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b17d7631-9320-43f1-ae51-1a60c2d3e6cc/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:30:00,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b17d7631-9320-43f1-ae51-1a60c2d3e6cc/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:30:00,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:30:00,312 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-02 12:30:00,312 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-02 12:30:00,313 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-02 12:30:00,313 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-02 12:30:00,313 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-02 12:30:00,313 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-02 12:30:00,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:30:00,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-02 12:30:00,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-02 12:30:00,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:30:00,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:30:00,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-02 12:30:00,318 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 12:30:00,502 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:30:00,505 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:30:01,133 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-02 12:30:01,133 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:30:01,595 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:30:01,595 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-02 12:30:01,596 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:30:01 BoogieIcfgContainer [2024-11-02 12:30:01,596 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:30:01,599 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:30:01,599 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:30:01,603 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:30:01,603 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:29:59" (1/3) ... [2024-11-02 12:30:01,604 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@427ba6ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:30:01, skipping insertion in model container [2024-11-02 12:30:01,604 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:30:00" (2/3) ... [2024-11-02 12:30:01,605 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@427ba6ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:30:01, skipping insertion in model container [2024-11-02 12:30:01,605 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:30:01" (3/3) ... [2024-11-02 12:30:01,606 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-trans.wvr.c [2024-11-02 12:30:01,627 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:30:01,627 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 12:30:01,627 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-02 12:30:01,693 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-02 12:30:01,750 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 36 transitions, 93 flow [2024-11-02 12:30:01,843 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 346 states, 345 states have (on average 3.8260869565217392) internal successors, (1320), 345 states have internal predecessors, (1320), 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 12:30:01,882 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:30:01,890 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;@476f16f2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:30:01,890 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-02 12:30:01,895 INFO L276 IsEmpty]: Start isEmpty. Operand has 346 states, 345 states have (on average 3.8260869565217392) internal successors, (1320), 345 states have internal predecessors, (1320), 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 12:30:01,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-02 12:30:01,918 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:30:01,918 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:30:01,919 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-02 12:30:01,926 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:30:01,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1224848673, now seen corresponding path program 1 times [2024-11-02 12:30:01,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:30:01,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466559086] [2024-11-02 12:30:01,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:30:01,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:30:02,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:30:02,261 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 12:30:02,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:30:02,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466559086] [2024-11-02 12:30:02,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466559086] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:30:02,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:30:02,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:30:02,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029588683] [2024-11-02 12:30:02,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:30:02,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-02 12:30:02,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:30:02,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-02 12:30:02,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-02 12:30:02,299 INFO L87 Difference]: Start difference. First operand has 346 states, 345 states have (on average 3.8260869565217392) internal successors, (1320), 345 states have internal predecessors, (1320), 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 11.0) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:30:02,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:30:02,412 INFO L93 Difference]: Finished difference Result 611 states and 2245 transitions. [2024-11-02 12:30:02,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-02 12:30:02,417 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-02 12:30:02,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:30:02,433 INFO L225 Difference]: With dead ends: 611 [2024-11-02 12:30:02,433 INFO L226 Difference]: Without dead ends: 346 [2024-11-02 12:30:02,438 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 12:30:02,441 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:30:02,442 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:30:02,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2024-11-02 12:30:02,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 346. [2024-11-02 12:30:02,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 3.2956521739130435) internal successors, (1137), 345 states have internal predecessors, (1137), 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 12:30:02,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1137 transitions. [2024-11-02 12:30:02,553 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1137 transitions. Word has length 22 [2024-11-02 12:30:02,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:30:02,556 INFO L471 AbstractCegarLoop]: Abstraction has 346 states and 1137 transitions. [2024-11-02 12:30:02,557 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:30:02,557 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1137 transitions. [2024-11-02 12:30:02,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-02 12:30:02,563 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:30:02,563 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:30:02,563 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:30:02,564 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-02 12:30:02,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:30:02,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1132127046, now seen corresponding path program 1 times [2024-11-02 12:30:02,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:30:02,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792836087] [2024-11-02 12:30:02,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:30:02,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:30:02,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:30:02,912 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 12:30:02,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:30:02,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792836087] [2024-11-02 12:30:02,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792836087] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:30:02,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:30:02,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:30:02,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628235235] [2024-11-02 12:30:02,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:30:02,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:30:02,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:30:02,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:30:02,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:30:02,919 INFO L87 Difference]: Start difference. First operand 346 states and 1137 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 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 12:30:03,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:30:03,039 INFO L93 Difference]: Finished difference Result 691 states and 2273 transitions. [2024-11-02 12:30:03,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:30:03,040 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 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 25 [2024-11-02 12:30:03,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:30:03,049 INFO L225 Difference]: With dead ends: 691 [2024-11-02 12:30:03,049 INFO L226 Difference]: Without dead ends: 347 [2024-11-02 12:30:03,054 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 12:30:03,055 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:30:03,056 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:30:03,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2024-11-02 12:30:03,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 347. [2024-11-02 12:30:03,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.2890173410404624) internal successors, (1138), 346 states have internal predecessors, (1138), 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 12:30:03,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1138 transitions. [2024-11-02 12:30:03,106 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1138 transitions. Word has length 25 [2024-11-02 12:30:03,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:30:03,107 INFO L471 AbstractCegarLoop]: Abstraction has 347 states and 1138 transitions. [2024-11-02 12:30:03,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 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 12:30:03,108 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1138 transitions. [2024-11-02 12:30:03,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-02 12:30:03,111 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:30:03,112 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:30:03,112 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 12:30:03,112 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-02 12:30:03,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:30:03,117 INFO L85 PathProgramCache]: Analyzing trace with hash -2045154135, now seen corresponding path program 1 times [2024-11-02 12:30:03,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:30:03,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525393200] [2024-11-02 12:30:03,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:30:03,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:30:03,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:30:03,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:30:03,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:30:03,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525393200] [2024-11-02 12:30:03,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525393200] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:30:03,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469132427] [2024-11-02 12:30:03,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:30:03,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:30:03,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b17d7631-9320-43f1-ae51-1a60c2d3e6cc/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:30:03,362 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b17d7631-9320-43f1-ae51-1a60c2d3e6cc/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:30:03,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b17d7631-9320-43f1-ae51-1a60c2d3e6cc/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:30:03,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:30:03,509 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-02 12:30:03,514 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:30:03,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:30:03,579 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:30:03,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:30:03,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469132427] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:30:03,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [921828473] [2024-11-02 12:30:03,646 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 12:30:03,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:30:03,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-02 12:30:03,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939933079] [2024-11-02 12:30:03,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:30:03,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-02 12:30:03,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:30:03,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-02 12:30:03,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:30:03,651 INFO L87 Difference]: Start difference. First operand 347 states and 1138 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:30:03,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:30:03,787 INFO L93 Difference]: Finished difference Result 693 states and 2276 transitions. [2024-11-02 12:30:03,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:30:03,787 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-11-02 12:30:03,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:30:03,793 INFO L225 Difference]: With dead ends: 693 [2024-11-02 12:30:03,793 INFO L226 Difference]: Without dead ends: 349 [2024-11-02 12:30:03,794 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:30:03,798 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:30:03,799 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:30:03,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2024-11-02 12:30:03,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2024-11-02 12:30:03,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.2758620689655173) internal successors, (1140), 348 states have internal predecessors, (1140), 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 12:30:03,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1140 transitions. [2024-11-02 12:30:03,820 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1140 transitions. Word has length 26 [2024-11-02 12:30:03,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:30:03,821 INFO L471 AbstractCegarLoop]: Abstraction has 349 states and 1140 transitions. [2024-11-02 12:30:03,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:30:03,821 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1140 transitions. [2024-11-02 12:30:03,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-02 12:30:03,824 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:30:03,825 INFO L215 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:30:03,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b17d7631-9320-43f1-ae51-1a60c2d3e6cc/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-02 12:30:04,025 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b17d7631-9320-43f1-ae51-1a60c2d3e6cc/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:30:04,026 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-02 12:30:04,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:30:04,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1529926967, now seen corresponding path program 2 times [2024-11-02 12:30:04,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:30:04,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811196152] [2024-11-02 12:30:04,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:30:04,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:30:04,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:30:04,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-02 12:30:04,371 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:30:04,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811196152] [2024-11-02 12:30:04,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811196152] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:30:04,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:30:04,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:30:04,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188031604] [2024-11-02 12:30:04,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:30:04,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:30:04,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:30:04,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:30:04,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:30:04,374 INFO L87 Difference]: Start difference. First operand 349 states and 1140 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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 12:30:04,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:30:04,569 INFO L93 Difference]: Finished difference Result 630 states and 2064 transitions. [2024-11-02 12:30:04,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:30:04,570 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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 28 [2024-11-02 12:30:04,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:30:04,575 INFO L225 Difference]: With dead ends: 630 [2024-11-02 12:30:04,575 INFO L226 Difference]: Without dead ends: 473 [2024-11-02 12:30:04,577 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:30:04,578 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 20 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:30:04,578 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 3 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:30:04,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2024-11-02 12:30:04,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 473. [2024-11-02 12:30:04,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 3.3008474576271185) internal successors, (1558), 472 states have internal predecessors, (1558), 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 12:30:04,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1558 transitions. [2024-11-02 12:30:04,610 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1558 transitions. Word has length 28 [2024-11-02 12:30:04,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:30:04,611 INFO L471 AbstractCegarLoop]: Abstraction has 473 states and 1558 transitions. [2024-11-02 12:30:04,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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 12:30:04,611 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1558 transitions. [2024-11-02 12:30:04,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-02 12:30:04,613 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:30:04,613 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:30:04,614 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 12:30:04,614 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-02 12:30:04,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:30:04,614 INFO L85 PathProgramCache]: Analyzing trace with hash -505500570, now seen corresponding path program 1 times [2024-11-02 12:30:04,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:30:04,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462023983] [2024-11-02 12:30:04,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:30:04,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:30:04,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:30:05,050 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-02 12:30:05,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:30:05,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462023983] [2024-11-02 12:30:05,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462023983] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:30:05,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:30:05,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:30:05,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044796608] [2024-11-02 12:30:05,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:30:05,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:30:05,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:30:05,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:30:05,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:30:05,053 INFO L87 Difference]: Start difference. First operand 473 states and 1558 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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 12:30:05,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:30:05,310 INFO L93 Difference]: Finished difference Result 837 states and 2779 transitions. [2024-11-02 12:30:05,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:30:05,311 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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 30 [2024-11-02 12:30:05,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:30:05,317 INFO L225 Difference]: With dead ends: 837 [2024-11-02 12:30:05,317 INFO L226 Difference]: Without dead ends: 651 [2024-11-02 12:30:05,318 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:30:05,321 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 22 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:30:05,321 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 3 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:30:05,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2024-11-02 12:30:05,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 651. [2024-11-02 12:30:05,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 650 states have (on average 3.3261538461538462) internal successors, (2162), 650 states have internal predecessors, (2162), 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 12:30:05,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 2162 transitions. [2024-11-02 12:30:05,415 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 2162 transitions. Word has length 30 [2024-11-02 12:30:05,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:30:05,416 INFO L471 AbstractCegarLoop]: Abstraction has 651 states and 2162 transitions. [2024-11-02 12:30:05,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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 12:30:05,419 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 2162 transitions. [2024-11-02 12:30:05,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-02 12:30:05,423 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:30:05,423 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:30:05,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-02 12:30:05,423 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-02 12:30:05,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:30:05,424 INFO L85 PathProgramCache]: Analyzing trace with hash -344640829, now seen corresponding path program 1 times [2024-11-02 12:30:05,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:30:05,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368403581] [2024-11-02 12:30:05,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:30:05,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:30:05,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:30:06,669 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-02 12:30:06,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:30:06,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368403581] [2024-11-02 12:30:06,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368403581] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:30:06,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636122026] [2024-11-02 12:30:06,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:30:06,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:30:06,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b17d7631-9320-43f1-ae51-1a60c2d3e6cc/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:30:06,672 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b17d7631-9320-43f1-ae51-1a60c2d3e6cc/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:30:06,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b17d7631-9320-43f1-ae51-1a60c2d3e6cc/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:30:06,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:30:06,847 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-02 12:30:06,852 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:30:07,740 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 109 treesize of output 69 [2024-11-02 12:30:08,333 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-02 12:30:08,333 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:30:09,853 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-02 12:30:09,854 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 195 treesize of output 103 [2024-11-02 12:30:10,082 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-02 12:30:10,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636122026] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:30:10,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [863399862] [2024-11-02 12:30:10,083 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 12:30:10,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:30:10,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 26 [2024-11-02 12:30:10,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766034533] [2024-11-02 12:30:10,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:30:10,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-02 12:30:10,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:30:10,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-02 12:30:10,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2024-11-02 12:30:10,089 INFO L87 Difference]: Start difference. First operand 651 states and 2162 transitions. Second operand has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 26 states have internal predecessors, (84), 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 12:30:15,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:30:15,949 INFO L93 Difference]: Finished difference Result 2560 states and 8298 transitions. [2024-11-02 12:30:15,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-02 12:30:15,950 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 26 states have internal predecessors, (84), 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 32 [2024-11-02 12:30:15,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:30:15,970 INFO L225 Difference]: With dead ends: 2560 [2024-11-02 12:30:15,971 INFO L226 Difference]: Without dead ends: 2359 [2024-11-02 12:30:15,973 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=660, Invalid=2646, Unknown=0, NotChecked=0, Total=3306 [2024-11-02 12:30:15,975 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 668 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 2394 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 2431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 2394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-02 12:30:15,976 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [668 Valid, 26 Invalid, 2431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 2394 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-02 12:30:15,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2024-11-02 12:30:16,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 1036. [2024-11-02 12:30:16,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 3.3545893719806763) internal successors, (3472), 1035 states have internal predecessors, (3472), 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 12:30:16,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 3472 transitions. [2024-11-02 12:30:16,235 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 3472 transitions. Word has length 32 [2024-11-02 12:30:16,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:30:16,236 INFO L471 AbstractCegarLoop]: Abstraction has 1036 states and 3472 transitions. [2024-11-02 12:30:16,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 26 states have internal predecessors, (84), 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 12:30:16,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 3472 transitions. [2024-11-02 12:30:16,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-02 12:30:16,242 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:30:16,242 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:30:16,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b17d7631-9320-43f1-ae51-1a60c2d3e6cc/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-02 12:30:16,447 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b17d7631-9320-43f1-ae51-1a60c2d3e6cc/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:30:16,448 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-02 12:30:16,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:30:16,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1099741707, now seen corresponding path program 2 times [2024-11-02 12:30:16,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:30:16,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462443736] [2024-11-02 12:30:16,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:30:16,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:30:16,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:30:17,445 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-02 12:30:17,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:30:17,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462443736] [2024-11-02 12:30:17,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462443736] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:30:17,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672048803] [2024-11-02 12:30:17,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:30:17,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:30:17,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b17d7631-9320-43f1-ae51-1a60c2d3e6cc/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:30:17,449 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b17d7631-9320-43f1-ae51-1a60c2d3e6cc/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:30:17,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b17d7631-9320-43f1-ae51-1a60c2d3e6cc/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 12:30:17,596 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-02 12:30:17,596 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:30:17,598 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-02 12:30:17,603 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:30:18,252 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 135 treesize of output 87 [2024-11-02 12:30:18,826 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-02 12:30:18,826 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:30:20,110 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-02 12:30:20,111 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 131 treesize of output 75 [2024-11-02 12:30:20,409 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-02 12:30:20,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672048803] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:30:20,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [60055185] [2024-11-02 12:30:20,410 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 12:30:20,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:30:20,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 26 [2024-11-02 12:30:20,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025338657] [2024-11-02 12:30:20,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:30:20,412 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-02 12:30:20,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:30:20,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-02 12:30:20,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2024-11-02 12:30:20,414 INFO L87 Difference]: Start difference. First operand 1036 states and 3472 transitions. Second operand has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 26 states have internal predecessors, (84), 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 12:30:23,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:30:23,740 INFO L93 Difference]: Finished difference Result 1831 states and 5978 transitions. [2024-11-02 12:30:23,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-02 12:30:23,741 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 26 states have internal predecessors, (84), 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 32 [2024-11-02 12:30:23,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:30:23,755 INFO L225 Difference]: With dead ends: 1831 [2024-11-02 12:30:23,755 INFO L226 Difference]: Without dead ends: 1772 [2024-11-02 12:30:23,757 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=296, Invalid=1510, Unknown=0, NotChecked=0, Total=1806 [2024-11-02 12:30:23,758 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 258 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 2284 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 2294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-02 12:30:23,758 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 16 Invalid, 2294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2284 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-02 12:30:23,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1772 states. [2024-11-02 12:30:23,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1772 to 1084. [2024-11-02 12:30:23,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 1083 states have (on average 3.3573407202216066) internal successors, (3636), 1083 states have internal predecessors, (3636), 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 12:30:23,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 3636 transitions. [2024-11-02 12:30:23,975 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 3636 transitions. Word has length 32 [2024-11-02 12:30:23,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:30:23,976 INFO L471 AbstractCegarLoop]: Abstraction has 1084 states and 3636 transitions. [2024-11-02 12:30:23,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.230769230769231) internal successors, (84), 26 states have internal predecessors, (84), 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 12:30:23,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 3636 transitions. [2024-11-02 12:30:23,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-02 12:30:23,986 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:30:23,986 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:30:24,008 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b17d7631-9320-43f1-ae51-1a60c2d3e6cc/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-02 12:30:24,186 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b17d7631-9320-43f1-ae51-1a60c2d3e6cc/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-02 12:30:24,187 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-02 12:30:24,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:30:24,187 INFO L85 PathProgramCache]: Analyzing trace with hash -32695935, now seen corresponding path program 3 times [2024-11-02 12:30:24,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:30:24,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473825358] [2024-11-02 12:30:24,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:30:24,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:30:24,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:30:25,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-02 12:30:25,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:30:25,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473825358] [2024-11-02 12:30:25,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473825358] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:30:25,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4840876] [2024-11-02 12:30:25,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-02 12:30:25,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:30:25,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b17d7631-9320-43f1-ae51-1a60c2d3e6cc/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:30:25,377 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b17d7631-9320-43f1-ae51-1a60c2d3e6cc/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:30:25,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b17d7631-9320-43f1-ae51-1a60c2d3e6cc/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 12:30:25,511 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-02 12:30:25,511 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:30:25,515 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-02 12:30:25,520 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:30:25,550 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 15 treesize of output 1 [2024-11-02 12:30:25,573 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 19 treesize of output 1 [2024-11-02 12:30:25,599 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 19 treesize of output 1 [2024-11-02 12:30:26,313 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 157 treesize of output 101 [2024-11-02 12:30:26,746 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:30:26,746 INFO L311 TraceCheckSpWp]: Computing backward predicates...