./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/unroll-cond-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637f15d-7fee-42ff-9863-b35851e77cac/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637f15d-7fee-42ff-9863-b35851e77cac/bin/utaipan-verify-FOvIYxoinp/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637f15d-7fee-42ff-9863-b35851e77cac/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637f15d-7fee-42ff-9863-b35851e77cac/bin/utaipan-verify-FOvIYxoinp/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637f15d-7fee-42ff-9863-b35851e77cac/bin/utaipan-verify-FOvIYxoinp/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637f15d-7fee-42ff-9863-b35851e77cac/bin/utaipan-verify-FOvIYxoinp --witnessprinter.witness.filename witness.graphml --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 4755329f7559a8be1422f8772c1ed30abe185c2742a237de140cc196ec4e9010 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 20:31:35,806 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 20:31:35,957 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637f15d-7fee-42ff-9863-b35851e77cac/bin/utaipan-verify-FOvIYxoinp/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-06 20:31:35,975 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 20:31:35,976 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 20:31:36,015 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 20:31:36,016 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 20:31:36,017 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 20:31:36,018 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 20:31:36,020 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 20:31:36,021 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 20:31:36,021 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 20:31:36,022 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 20:31:36,022 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 20:31:36,022 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 20:31:36,023 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 20:31:36,023 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 20:31:36,024 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 20:31:36,024 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 20:31:36,025 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 20:31:36,025 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 20:31:36,026 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 20:31:36,027 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 20:31:36,027 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 20:31:36,028 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 20:31:36,028 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 20:31:36,028 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 20:31:36,029 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 20:31:36,029 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 20:31:36,030 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 20:31:36,031 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 20:31:36,031 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 20:31:36,031 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 20:31:36,032 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 20:31:36,032 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 20:31:36,032 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 20:31:36,032 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:31:36,033 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 20:31:36,033 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 20:31:36,033 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 20:31:36,033 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 20:31:36,034 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 20:31:36,034 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 20:31:36,034 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 20:31:36,035 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 20:31:36,035 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_e637f15d-7fee-42ff-9863-b35851e77cac/bin/utaipan-verify-FOvIYxoinp/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637f15d-7fee-42ff-9863-b35851e77cac/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4755329f7559a8be1422f8772c1ed30abe185c2742a237de140cc196ec4e9010 [2023-11-06 20:31:36,373 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 20:31:36,406 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 20:31:36,409 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 20:31:36,410 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 20:31:36,410 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 20:31:36,413 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637f15d-7fee-42ff-9863-b35851e77cac/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/weaver/unroll-cond-4.wvr.c [2023-11-06 20:31:39,491 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 20:31:39,742 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 20:31:39,743 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637f15d-7fee-42ff-9863-b35851e77cac/sv-benchmarks/c/weaver/unroll-cond-4.wvr.c [2023-11-06 20:31:39,753 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637f15d-7fee-42ff-9863-b35851e77cac/bin/utaipan-verify-FOvIYxoinp/data/685e2805f/ebf9bba0e1f145109119ae0de1f30577/FLAGa170ea5d8 [2023-11-06 20:31:39,772 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637f15d-7fee-42ff-9863-b35851e77cac/bin/utaipan-verify-FOvIYxoinp/data/685e2805f/ebf9bba0e1f145109119ae0de1f30577 [2023-11-06 20:31:39,778 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 20:31:39,780 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 20:31:39,784 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 20:31:39,784 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 20:31:39,789 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 20:31:39,790 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:31:39" (1/1) ... [2023-11-06 20:31:39,791 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dd3aef6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:39, skipping insertion in model container [2023-11-06 20:31:39,792 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:31:39" (1/1) ... [2023-11-06 20:31:39,827 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 20:31:40,076 WARN L240 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_e637f15d-7fee-42ff-9863-b35851e77cac/sv-benchmarks/c/weaver/unroll-cond-4.wvr.c[2808,2821] [2023-11-06 20:31:40,087 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:31:40,101 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 20:31:40,155 WARN L240 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_e637f15d-7fee-42ff-9863-b35851e77cac/sv-benchmarks/c/weaver/unroll-cond-4.wvr.c[2808,2821] [2023-11-06 20:31:40,158 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:31:40,183 INFO L206 MainTranslator]: Completed translation [2023-11-06 20:31:40,183 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:40 WrapperNode [2023-11-06 20:31:40,184 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 20:31:40,185 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 20:31:40,190 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 20:31:40,190 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 20:31:40,199 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:40" (1/1) ... [2023-11-06 20:31:40,227 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:40" (1/1) ... [2023-11-06 20:31:40,261 INFO L138 Inliner]: procedures = 24, calls = 41, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 186 [2023-11-06 20:31:40,262 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 20:31:40,263 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 20:31:40,263 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 20:31:40,263 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 20:31:40,273 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:40" (1/1) ... [2023-11-06 20:31:40,273 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:40" (1/1) ... [2023-11-06 20:31:40,277 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:40" (1/1) ... [2023-11-06 20:31:40,277 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:40" (1/1) ... [2023-11-06 20:31:40,287 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:40" (1/1) ... [2023-11-06 20:31:40,292 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:40" (1/1) ... [2023-11-06 20:31:40,294 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:40" (1/1) ... [2023-11-06 20:31:40,296 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:40" (1/1) ... [2023-11-06 20:31:40,300 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 20:31:40,301 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 20:31:40,301 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 20:31:40,301 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 20:31:40,302 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:40" (1/1) ... [2023-11-06 20:31:40,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:31:40,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637f15d-7fee-42ff-9863-b35851e77cac/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:31:40,342 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637f15d-7fee-42ff-9863-b35851e77cac/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 20:31:40,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637f15d-7fee-42ff-9863-b35851e77cac/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 20:31:40,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 20:31:40,415 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 20:31:40,416 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 20:31:40,416 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 20:31:40,417 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 20:31:40,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 20:31:40,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 20:31:40,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 20:31:40,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 20:31:40,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 20:31:40,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 20:31:40,421 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 20:31:40,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 20:31:40,423 WARN L210 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 20:31:40,559 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 20:31:40,562 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 20:31:41,002 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 20:31:41,014 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 20:31:41,015 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 20:31:41,020 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:31:41 BoogieIcfgContainer [2023-11-06 20:31:41,021 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 20:31:41,024 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 20:31:41,024 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 20:31:41,028 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 20:31:41,028 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 08:31:39" (1/3) ... [2023-11-06 20:31:41,029 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a7f53aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:31:41, skipping insertion in model container [2023-11-06 20:31:41,029 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:40" (2/3) ... [2023-11-06 20:31:41,029 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a7f53aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:31:41, skipping insertion in model container [2023-11-06 20:31:41,030 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:31:41" (3/3) ... [2023-11-06 20:31:41,031 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-4.wvr.c [2023-11-06 20:31:41,041 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 20:31:41,051 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 20:31:41,051 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 20:31:41,051 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 20:31:41,179 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 20:31:41,234 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-06 20:31:41,259 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 225 places, 239 transitions, 492 flow [2023-11-06 20:31:41,262 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 225 places, 239 transitions, 492 flow [2023-11-06 20:31:41,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 225 places, 239 transitions, 492 flow [2023-11-06 20:31:41,409 INFO L124 PetriNetUnfolderBase]: 21/237 cut-off events. [2023-11-06 20:31:41,409 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 20:31:41,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 237 events. 21/237 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 403 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 141. Up to 2 conditions per place. [2023-11-06 20:31:41,424 INFO L119 LiptonReduction]: Number of co-enabled transitions 6080 [2023-11-06 20:31:55,166 INFO L134 LiptonReduction]: Checked pairs total: 5806 [2023-11-06 20:31:55,167 INFO L136 LiptonReduction]: Total number of compositions: 282 [2023-11-06 20:31:55,180 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 20 transitions, 54 flow [2023-11-06 20:31:55,208 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 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) [2023-11-06 20:31:55,238 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 20:31:55,247 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=LoopsAndPotentialCycles, 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;@3f2bbf32, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 20:31:55,247 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-06 20:31:55,249 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 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) [2023-11-06 20:31:55,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-06 20:31:55,257 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:31:55,258 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:31:55,258 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 20:31:55,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:31:55,269 INFO L85 PathProgramCache]: Analyzing trace with hash -530569822, now seen corresponding path program 1 times [2023-11-06 20:31:55,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:31:55,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949070034] [2023-11-06 20:31:55,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:55,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:31:55,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:31:55,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:31:55,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:31:55,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949070034] [2023-11-06 20:31:55,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949070034] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:31:55,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:31:55,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 20:31:55,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680166081] [2023-11-06 20:31:55,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:31:55,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:31:55,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:31:55,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:31:55,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:31:55,876 INFO L87 Difference]: Start difference. First operand has 35 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 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, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:31:56,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:31:56,629 INFO L93 Difference]: Finished difference Result 36 states and 76 transitions. [2023-11-06 20:31:56,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:31:56,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-06 20:31:56,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:31:56,641 INFO L225 Difference]: With dead ends: 36 [2023-11-06 20:31:56,641 INFO L226 Difference]: Without dead ends: 36 [2023-11-06 20:31:56,642 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 [2023-11-06 20:31:56,645 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 20:31:56,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 20:31:56,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-06 20:31:56,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-11-06 20:31:56,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 states have internal predecessors, (76), 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) [2023-11-06 20:31:56,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 76 transitions. [2023-11-06 20:31:56,680 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 76 transitions. Word has length 14 [2023-11-06 20:31:56,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:31:56,681 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 76 transitions. [2023-11-06 20:31:56,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:31:56,681 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 76 transitions. [2023-11-06 20:31:56,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-06 20:31:56,683 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:31:56,683 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:31:56,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 20:31:56,684 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 20:31:56,684 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:31:56,684 INFO L85 PathProgramCache]: Analyzing trace with hash 444091136, now seen corresponding path program 1 times [2023-11-06 20:31:56,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:31:56,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118895495] [2023-11-06 20:31:56,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:56,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:31:56,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:31:57,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 20:31:57,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:31:57,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118895495] [2023-11-06 20:31:57,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118895495] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:31:57,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:31:57,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 20:31:57,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972369751] [2023-11-06 20:31:57,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:31:57,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 20:31:57,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:31:57,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 20:31:57,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:31:57,179 INFO L87 Difference]: Start difference. First operand 36 states and 76 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2023-11-06 20:31:57,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:31:57,465 INFO L93 Difference]: Finished difference Result 64 states and 135 transitions. [2023-11-06 20:31:57,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:31:57,465 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 15 [2023-11-06 20:31:57,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:31:57,467 INFO L225 Difference]: With dead ends: 64 [2023-11-06 20:31:57,467 INFO L226 Difference]: Without dead ends: 64 [2023-11-06 20:31:57,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 20:31:57,469 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 22 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 20:31:57,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 8 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 20:31:57,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-06 20:31:57,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 50. [2023-11-06 20:31:57,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 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) [2023-11-06 20:31:57,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 105 transitions. [2023-11-06 20:31:57,480 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 105 transitions. Word has length 15 [2023-11-06 20:31:57,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:31:57,480 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 105 transitions. [2023-11-06 20:31:57,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2023-11-06 20:31:57,481 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 105 transitions. [2023-11-06 20:31:57,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-06 20:31:57,482 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:31:57,482 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:31:57,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 20:31:57,483 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 20:31:57,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:31:57,483 INFO L85 PathProgramCache]: Analyzing trace with hash -870510408, now seen corresponding path program 2 times [2023-11-06 20:31:57,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:31:57,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398331673] [2023-11-06 20:31:57,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:57,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:31:57,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:31:57,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 20:31:57,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:31:57,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398331673] [2023-11-06 20:31:57,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398331673] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:31:57,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:31:57,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 20:31:57,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164055006] [2023-11-06 20:31:57,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:31:57,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 20:31:57,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:31:57,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 20:31:57,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:31:57,823 INFO L87 Difference]: Start difference. First operand 50 states and 105 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2023-11-06 20:31:58,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:31:58,076 INFO L93 Difference]: Finished difference Result 78 states and 163 transitions. [2023-11-06 20:31:58,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:31:58,077 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 15 [2023-11-06 20:31:58,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:31:58,078 INFO L225 Difference]: With dead ends: 78 [2023-11-06 20:31:58,079 INFO L226 Difference]: Without dead ends: 78 [2023-11-06 20:31:58,079 INFO L412 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 [2023-11-06 20:31:58,080 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:31:58,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 6 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:31:58,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-06 20:31:58,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2023-11-06 20:31:58,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 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) [2023-11-06 20:31:58,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 117 transitions. [2023-11-06 20:31:58,091 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 117 transitions. Word has length 15 [2023-11-06 20:31:58,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:31:58,092 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 117 transitions. [2023-11-06 20:31:58,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2023-11-06 20:31:58,093 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 117 transitions. [2023-11-06 20:31:58,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-06 20:31:58,094 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:31:58,094 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:31:58,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 20:31:58,095 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 20:31:58,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:31:58,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1719790040, now seen corresponding path program 3 times [2023-11-06 20:31:58,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:31:58,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416094506] [2023-11-06 20:31:58,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:58,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:31:58,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:31:58,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 20:31:58,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:31:58,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416094506] [2023-11-06 20:31:58,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416094506] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:31:58,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:31:58,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 20:31:58,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516764682] [2023-11-06 20:31:58,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:31:58,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 20:31:58,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:31:58,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 20:31:58,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:31:58,412 INFO L87 Difference]: Start difference. First operand 54 states and 117 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2023-11-06 20:31:58,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:31:58,614 INFO L93 Difference]: Finished difference Result 72 states and 154 transitions. [2023-11-06 20:31:58,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:31:58,614 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 15 [2023-11-06 20:31:58,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:31:58,616 INFO L225 Difference]: With dead ends: 72 [2023-11-06 20:31:58,616 INFO L226 Difference]: Without dead ends: 72 [2023-11-06 20:31:58,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 20:31:58,617 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:31:58,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 5 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:31:58,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-06 20:31:58,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 54. [2023-11-06 20:31:58,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 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) [2023-11-06 20:31:58,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 117 transitions. [2023-11-06 20:31:58,627 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 117 transitions. Word has length 15 [2023-11-06 20:31:58,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:31:58,628 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 117 transitions. [2023-11-06 20:31:58,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2023-11-06 20:31:58,628 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 117 transitions. [2023-11-06 20:31:58,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-06 20:31:58,629 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:31:58,629 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:31:58,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 20:31:58,630 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 20:31:58,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:31:58,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1569075422, now seen corresponding path program 4 times [2023-11-06 20:31:58,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:31:58,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269001634] [2023-11-06 20:31:58,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:58,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:31:58,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:31:58,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 20:31:58,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:31:58,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269001634] [2023-11-06 20:31:58,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269001634] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:31:58,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:31:58,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 20:31:58,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587036961] [2023-11-06 20:31:58,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:31:58,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 20:31:58,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:31:58,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 20:31:58,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:31:58,882 INFO L87 Difference]: Start difference. First operand 54 states and 117 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2023-11-06 20:31:59,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:31:59,080 INFO L93 Difference]: Finished difference Result 76 states and 172 transitions. [2023-11-06 20:31:59,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:31:59,081 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 15 [2023-11-06 20:31:59,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:31:59,082 INFO L225 Difference]: With dead ends: 76 [2023-11-06 20:31:59,083 INFO L226 Difference]: Without dead ends: 76 [2023-11-06 20:31:59,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:31:59,084 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:31:59,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 5 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:31:59,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-06 20:31:59,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 58. [2023-11-06 20:31:59,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.3333333333333335) internal successors, (133), 57 states have internal predecessors, (133), 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) [2023-11-06 20:31:59,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 133 transitions. [2023-11-06 20:31:59,093 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 133 transitions. Word has length 15 [2023-11-06 20:31:59,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:31:59,094 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 133 transitions. [2023-11-06 20:31:59,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2023-11-06 20:31:59,094 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 133 transitions. [2023-11-06 20:31:59,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-06 20:31:59,096 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:31:59,096 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:31:59,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 20:31:59,096 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 20:31:59,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:31:59,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1021225026, now seen corresponding path program 5 times [2023-11-06 20:31:59,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:31:59,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753314709] [2023-11-06 20:31:59,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:59,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:31:59,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:31:59,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 20:31:59,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:31:59,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753314709] [2023-11-06 20:31:59,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753314709] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:31:59,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:31:59,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 20:31:59,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606774775] [2023-11-06 20:31:59,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:31:59,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 20:31:59,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:31:59,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 20:31:59,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:31:59,409 INFO L87 Difference]: Start difference. First operand 58 states and 133 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2023-11-06 20:31:59,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:31:59,577 INFO L93 Difference]: Finished difference Result 68 states and 160 transitions. [2023-11-06 20:31:59,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:31:59,578 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 15 [2023-11-06 20:31:59,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:31:59,579 INFO L225 Difference]: With dead ends: 68 [2023-11-06 20:31:59,579 INFO L226 Difference]: Without dead ends: 68 [2023-11-06 20:31:59,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-06 20:31:59,581 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:31:59,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 5 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:31:59,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-06 20:31:59,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2023-11-06 20:31:59,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.2545454545454544) internal successors, (124), 55 states have internal predecessors, (124), 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) [2023-11-06 20:31:59,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 124 transitions. [2023-11-06 20:31:59,588 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 124 transitions. Word has length 15 [2023-11-06 20:31:59,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:31:59,588 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 124 transitions. [2023-11-06 20:31:59,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2023-11-06 20:31:59,589 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 124 transitions. [2023-11-06 20:31:59,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-06 20:31:59,590 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:31:59,590 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:31:59,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 20:31:59,591 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 20:31:59,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:31:59,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1388486272, now seen corresponding path program 6 times [2023-11-06 20:31:59,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:31:59,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905276423] [2023-11-06 20:31:59,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:59,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:31:59,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:31:59,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 20:31:59,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:31:59,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905276423] [2023-11-06 20:31:59,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905276423] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:31:59,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:31:59,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 20:31:59,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142796421] [2023-11-06 20:31:59,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:31:59,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 20:31:59,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:31:59,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 20:31:59,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:31:59,902 INFO L87 Difference]: Start difference. First operand 56 states and 124 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2023-11-06 20:32:00,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:32:00,011 INFO L93 Difference]: Finished difference Result 74 states and 160 transitions. [2023-11-06 20:32:00,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:32:00,012 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 15 [2023-11-06 20:32:00,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:32:00,013 INFO L225 Difference]: With dead ends: 74 [2023-11-06 20:32:00,013 INFO L226 Difference]: Without dead ends: 74 [2023-11-06 20:32:00,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:32:00,014 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:32:00,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 9 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:32:00,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-06 20:32:00,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 58. [2023-11-06 20:32:00,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.2280701754385963) internal successors, (127), 57 states have internal predecessors, (127), 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) [2023-11-06 20:32:00,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 127 transitions. [2023-11-06 20:32:00,021 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 127 transitions. Word has length 15 [2023-11-06 20:32:00,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:32:00,021 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 127 transitions. [2023-11-06 20:32:00,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2023-11-06 20:32:00,022 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 127 transitions. [2023-11-06 20:32:00,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-06 20:32:00,023 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:32:00,023 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:32:00,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 20:32:00,024 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 20:32:00,024 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:32:00,024 INFO L85 PathProgramCache]: Analyzing trace with hash 859754245, now seen corresponding path program 1 times [2023-11-06 20:32:00,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:32:00,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593872714] [2023-11-06 20:32:00,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:32:00,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:32:00,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:32:00,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 20:32:00,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:32:00,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593872714] [2023-11-06 20:32:00,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593872714] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:32:00,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906757724] [2023-11-06 20:32:00,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:32:00,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:32:00,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637f15d-7fee-42ff-9863-b35851e77cac/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:32:00,450 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637f15d-7fee-42ff-9863-b35851e77cac/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:32:00,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637f15d-7fee-42ff-9863-b35851e77cac/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 20:32:00,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:32:00,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 20:32:00,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:32:00,759 INFO L351 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 [2023-11-06 20:32:00,837 INFO L351 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 8 treesize of output 1 [2023-11-06 20:32:00,918 INFO L351 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 8 treesize of output 1 [2023-11-06 20:32:02,249 INFO L322 Elim1Store]: treesize reduction 200, result has 19.7 percent of original size [2023-11-06 20:32:02,250 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 533 treesize of output 387 [2023-11-06 20:32:05,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:32:05,088 INFO L327 TraceCheckSpWp]: Computing backward predicates...