./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-data-race.prp --file ../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for data races Using default analysis Version 0e0057cc 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_6f65471d-4ea0-46c8-b1ec-bdd1fee2873d/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f65471d-4ea0-46c8-b1ec-bdd1fee2873d/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f65471d-4ea0-46c8-b1ec-bdd1fee2873d/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f65471d-4ea0-46c8-b1ec-bdd1fee2873d/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f65471d-4ea0-46c8-b1ec-bdd1fee2873d/bin/utaipan-verify-SwPr7d2a91/config/svcomp-DataRace-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f65471d-4ea0-46c8-b1ec-bdd1fee2873d/bin/utaipan-verify-SwPr7d2a91 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! data-race) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9db11e263e78e3a6bd75c2a0c3dda64920ec857df2fbb1d0b7b1072a48f36a31 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:50:04,989 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:50:05,111 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f65471d-4ea0-46c8-b1ec-bdd1fee2873d/bin/utaipan-verify-SwPr7d2a91/config/svcomp-DataRace-32bit-Taipan_Default.epf [2023-11-24 23:50:05,119 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:50:05,120 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:50:05,161 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:50:05,162 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:50:05,162 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:50:05,166 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:50:05,171 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:50:05,171 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:50:05,172 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:50:05,172 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:50:05,174 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:50:05,174 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:50:05,175 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:50:05,176 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:50:05,176 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:50:05,176 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:50:05,177 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:50:05,178 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:50:05,178 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:50:05,180 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:50:05,180 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:50:05,181 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:50:05,181 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:50:05,182 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:50:05,182 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:50:05,183 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:50:05,183 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:50:05,184 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:50:05,185 INFO L153 SettingsManager]: * Check absence of data races in concurrent programs=true [2023-11-24 23:50:05,185 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 23:50:05,186 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:50:05,186 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:50:05,186 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:50:05,187 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:50:05,187 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:50:05,187 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:50:05,188 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:50:05,188 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:50:05,188 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:50:05,189 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:50:05,189 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:50:05,190 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:50:05,190 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:50:05,190 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:50:05,191 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:50:05,191 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_6f65471d-4ea0-46c8-b1ec-bdd1fee2873d/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f65471d-4ea0-46c8-b1ec-bdd1fee2873d/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9db11e263e78e3a6bd75c2a0c3dda64920ec857df2fbb1d0b7b1072a48f36a31 [2023-11-24 23:50:05,460 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:50:05,493 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:50:05,497 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:50:05,498 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:50:05,499 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:50:05,500 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f65471d-4ea0-46c8-b1ec-bdd1fee2873d/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2023-11-24 23:50:08,644 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:50:08,943 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:50:08,944 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f65471d-4ea0-46c8-b1ec-bdd1fee2873d/sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2023-11-24 23:50:08,953 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f65471d-4ea0-46c8-b1ec-bdd1fee2873d/bin/utaipan-verify-SwPr7d2a91/data/213e035ce/2300999a01ec4ff9a059b4bf81de747d/FLAG883e26b5b [2023-11-24 23:50:08,971 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f65471d-4ea0-46c8-b1ec-bdd1fee2873d/bin/utaipan-verify-SwPr7d2a91/data/213e035ce/2300999a01ec4ff9a059b4bf81de747d [2023-11-24 23:50:08,977 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:50:08,980 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:50:08,984 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:50:08,984 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:50:08,990 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:50:08,991 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:50:08" (1/1) ... [2023-11-24 23:50:08,992 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dd92a60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:50:08, skipping insertion in model container [2023-11-24 23:50:08,992 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:50:08" (1/1) ... [2023-11-24 23:50:09,040 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:50:09,323 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:50:09,339 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:50:09,387 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:50:09,404 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:50:09,405 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:50:09 WrapperNode [2023-11-24 23:50:09,405 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:50:09,406 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:50:09,406 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:50:09,406 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:50:09,414 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:50:09" (1/1) ... [2023-11-24 23:50:09,428 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:50:09" (1/1) ... [2023-11-24 23:50:09,485 INFO L138 Inliner]: procedures = 26, calls = 51, calls flagged for inlining = 19, calls inlined = 25, statements flattened = 561 [2023-11-24 23:50:09,486 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:50:09,486 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:50:09,487 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:50:09,487 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:50:09,497 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:50:09" (1/1) ... [2023-11-24 23:50:09,497 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:50:09" (1/1) ... [2023-11-24 23:50:09,506 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:50:09" (1/1) ... [2023-11-24 23:50:09,506 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:50:09" (1/1) ... [2023-11-24 23:50:09,548 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:50:09" (1/1) ... [2023-11-24 23:50:09,554 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:50:09" (1/1) ... [2023-11-24 23:50:09,574 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:50:09" (1/1) ... [2023-11-24 23:50:09,577 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:50:09" (1/1) ... [2023-11-24 23:50:09,584 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:50:09,585 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:50:09,585 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:50:09,585 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:50:09,586 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:50:09" (1/1) ... [2023-11-24 23:50:09,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:50:09,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f65471d-4ea0-46c8-b1ec-bdd1fee2873d/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:50:09,627 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f65471d-4ea0-46c8-b1ec-bdd1fee2873d/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:50:09,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f65471d-4ea0-46c8-b1ec-bdd1fee2873d/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:50:09,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:50:09,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 23:50:09,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-24 23:50:09,680 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-24 23:50:09,681 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-24 23:50:09,681 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-24 23:50:09,683 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-24 23:50:09,683 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-24 23:50:09,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:50:09,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 23:50:09,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:50:09,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:50:09,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 23:50:09,686 WARN L213 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 23:50:09,865 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:50:09,868 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:50:11,055 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:50:11,086 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:50:11,087 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-24 23:50:11,089 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:50:11 BoogieIcfgContainer [2023-11-24 23:50:11,089 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:50:11,092 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:50:11,092 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:50:11,096 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:50:11,097 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:50:08" (1/3) ... [2023-11-24 23:50:11,098 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@622d3572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:50:11, skipping insertion in model container [2023-11-24 23:50:11,098 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:50:09" (2/3) ... [2023-11-24 23:50:11,098 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@622d3572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:50:11, skipping insertion in model container [2023-11-24 23:50:11,099 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:50:11" (3/3) ... [2023-11-24 23:50:11,100 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-symm.wvr.c [2023-11-24 23:50:11,109 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-24 23:50:11,122 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:50:11,122 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 80 error locations. [2023-11-24 23:50:11,122 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 23:50:11,281 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-24 23:50:11,330 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 709 places, 735 transitions, 1484 flow [2023-11-24 23:50:19,716 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 224601 states, 223196 states have (on average 2.9599813616731483) internal successors, (660656), 224600 states have internal predecessors, (660656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:50:19,750 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:50:19,792 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, 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;@235b05cc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:50:19,793 INFO L358 AbstractCegarLoop]: Starting to check reachability of 132 error locations. [2023-11-24 23:50:20,183 INFO L276 IsEmpty]: Start isEmpty. Operand has 224601 states, 223196 states have (on average 2.9599813616731483) internal successors, (660656), 224600 states have internal predecessors, (660656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:50:20,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-24 23:50:20,192 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:50:20,193 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:50:20,194 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE === [thread1Err0ASSERT_VIOLATIONDATA_RACE, thread1Err1ASSERT_VIOLATIONDATA_RACE, thread1Err2ASSERT_VIOLATIONDATA_RACE, thread1Err3ASSERT_VIOLATIONDATA_RACE (and 128 more)] === [2023-11-24 23:50:20,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:50:20,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1037322181, now seen corresponding path program 1 times [2023-11-24 23:50:20,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:50:20,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811956129] [2023-11-24 23:50:20,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:50:20,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:50:20,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:50:20,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:50:20,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:50:20,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811956129] [2023-11-24 23:50:20,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811956129] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:50:20,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:50:20,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:50:20,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868332210] [2023-11-24 23:50:20,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:50:20,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:50:20,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:50:20,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:50:20,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:50:20,954 INFO L87 Difference]: Start difference. First operand has 224601 states, 223196 states have (on average 2.9599813616731483) internal successors, (660656), 224600 states have internal predecessors, (660656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 14.0) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:50:24,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:50:24,487 INFO L93 Difference]: Finished difference Result 224600 states and 654650 transitions. [2023-11-24 23:50:24,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:50:24,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 14.0) internal successors, (28), 3 states have internal predecessors, (28), 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 [2023-11-24 23:50:24,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:50:26,811 INFO L225 Difference]: With dead ends: 224600 [2023-11-24 23:50:26,817 INFO L226 Difference]: Without dead ends: 224559 [2023-11-24 23:50:26,819 INFO L412 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 [2023-11-24 23:50:26,823 INFO L413 NwaCegarLoop]: 682 mSDtfsCounter, 2 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1329 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:50:26,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1329 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:50:27,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224559 states. [2023-11-24 23:50:35,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224559 to 224559. [2023-11-24 23:50:36,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224559 states, 222945 states have (on average 2.9359303864181747) internal successors, (654551), 224558 states have internal predecessors, (654551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:50:38,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224559 states to 224559 states and 654551 transitions. [2023-11-24 23:50:38,432 INFO L78 Accepts]: Start accepts. Automaton has 224559 states and 654551 transitions. Word has length 28 [2023-11-24 23:50:38,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:50:38,433 INFO L495 AbstractCegarLoop]: Abstraction has 224559 states and 654551 transitions. [2023-11-24 23:50:38,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 14.0) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:50:38,433 INFO L276 IsEmpty]: Start isEmpty. Operand 224559 states and 654551 transitions. [2023-11-24 23:50:38,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-24 23:50:38,435 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:50:38,435 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:50:38,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:50:38,436 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONDATA_RACE === [thread1Err0ASSERT_VIOLATIONDATA_RACE, thread1Err1ASSERT_VIOLATIONDATA_RACE, thread1Err2ASSERT_VIOLATIONDATA_RACE, thread1Err3ASSERT_VIOLATIONDATA_RACE (and 128 more)] === [2023-11-24 23:50:38,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:50:38,437 INFO L85 PathProgramCache]: Analyzing trace with hash -608275552, now seen corresponding path program 1 times [2023-11-24 23:50:38,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:50:38,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290019606] [2023-11-24 23:50:38,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:50:38,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:50:38,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:50:38,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:50:38,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:50:38,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290019606] [2023-11-24 23:50:38,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290019606] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:50:38,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:50:38,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:50:38,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891460843] [2023-11-24 23:50:38,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:50:38,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:50:38,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:50:38,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:50:38,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:50:38,552 INFO L87 Difference]: Start difference. First operand 224559 states and 654551 transitions. Second operand has 3 states, 2 states have (on average 16.0) internal successors, (32), 3 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) [2023-11-24 23:50:40,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:50:40,652 INFO L93 Difference]: Finished difference Result 215660 states and 628672 transitions. [2023-11-24 23:50:40,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:50:40,656 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 16.0) internal successors, (32), 3 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 32 [2023-11-24 23:50:40,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:50:41,691 INFO L225 Difference]: With dead ends: 215660 [2023-11-24 23:50:41,692 INFO L226 Difference]: Without dead ends: 215660 [2023-11-24 23:50:41,692 INFO L412 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 [2023-11-24 23:50:41,694 INFO L413 NwaCegarLoop]: 652 mSDtfsCounter, 626 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:50:41,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [626 Valid, 680 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:50:43,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215660 states. [2023-11-24 23:50:48,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215660 to 215660. [2023-11-24 23:50:49,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215660 states, 214371 states have (on average 2.9326354777465236) internal successors, (628672), 215659 states have internal predecessors, (628672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:50:50,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215660 states to 215660 states and 628672 transitions. [2023-11-24 23:50:50,397 INFO L78 Accepts]: Start accepts. Automaton has 215660 states and 628672 transitions. Word has length 32 [2023-11-24 23:50:50,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:50:50,398 INFO L495 AbstractCegarLoop]: Abstraction has 215660 states and 628672 transitions. [2023-11-24 23:50:50,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 16.0) internal successors, (32), 3 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) [2023-11-24 23:50:50,399 INFO L276 IsEmpty]: Start isEmpty. Operand 215660 states and 628672 transitions. [2023-11-24 23:50:50,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-24 23:50:50,400 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:50:50,400 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:50:50,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 23:50:50,401 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONDATA_RACE === [thread1Err0ASSERT_VIOLATIONDATA_RACE, thread1Err1ASSERT_VIOLATIONDATA_RACE, thread1Err2ASSERT_VIOLATIONDATA_RACE, thread1Err3ASSERT_VIOLATIONDATA_RACE (and 128 more)] === [2023-11-24 23:50:50,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:50:50,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1029899998, now seen corresponding path program 1 times [2023-11-24 23:50:50,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:50:50,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849824140] [2023-11-24 23:50:50,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:50:50,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:50:50,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:50:50,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:50:50,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:50:50,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849824140] [2023-11-24 23:50:50,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849824140] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:50:50,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:50:50,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:50:50,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865816206] [2023-11-24 23:50:50,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:50:50,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:50:50,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:50:50,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:50:50,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:50:50,538 INFO L87 Difference]: Start difference. First operand 215660 states and 628672 transitions. Second operand has 3 states, 2 states have (on average 22.0) internal successors, (44), 3 states have internal predecessors, (44), 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)