./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash faddac23864cc4e42f962ac43a8d0f59593853dbb1d55e3baabe0c76b2187dd4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:06:09,913 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:06:10,057 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:06:10,073 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:06:10,074 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:06:10,131 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:06:10,132 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:06:10,133 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:06:10,135 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:06:10,141 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:06:10,142 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:06:10,143 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:06:10,144 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:06:10,146 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:06:10,147 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:06:10,147 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:06:10,148 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:06:10,148 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:06:10,149 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:06:10,150 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:06:10,150 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:06:10,151 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:06:10,152 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:06:10,153 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:06:10,153 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:06:10,154 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:06:10,154 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:06:10,155 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:06:10,155 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:06:10,156 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:06:10,158 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:06:10,158 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:06:10,158 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:06:10,159 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:06:10,159 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:06:10,159 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:06:10,160 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:06:10,160 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:06:10,160 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:06:10,161 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:06:10,161 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:06:10,161 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:06:10,162 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:06:10,162 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:06:10,163 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:06:10,163 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_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> faddac23864cc4e42f962ac43a8d0f59593853dbb1d55e3baabe0c76b2187dd4 [2023-11-19 05:06:10,507 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:06:10,534 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:06:10,538 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:06:10,540 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:06:10,540 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:06:10,542 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2023-11-19 05:06:14,196 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:06:14,451 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:06:14,452 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2023-11-19 05:06:14,462 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/data/ecc3dce48/3c3f43df887d485fb1e534246abe4ff7/FLAGe753e62b0 [2023-11-19 05:06:14,475 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/data/ecc3dce48/3c3f43df887d485fb1e534246abe4ff7 [2023-11-19 05:06:14,477 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:06:14,479 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:06:14,480 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:06:14,481 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:06:14,492 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:06:14,493 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:06:14" (1/1) ... [2023-11-19 05:06:14,495 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6838298f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:14, skipping insertion in model container [2023-11-19 05:06:14,495 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:06:14" (1/1) ... [2023-11-19 05:06:14,540 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:06:14,730 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_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c[2781,2794] [2023-11-19 05:06:14,745 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:06:14,757 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:06:14,793 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_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c[2781,2794] [2023-11-19 05:06:14,799 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:06:14,818 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:06:14,819 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:14 WrapperNode [2023-11-19 05:06:14,819 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:06:14,820 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:06:14,820 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:06:14,820 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:06:14,826 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:14" (1/1) ... [2023-11-19 05:06:14,836 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:14" (1/1) ... [2023-11-19 05:06:14,887 INFO L138 Inliner]: procedures = 23, calls = 41, calls flagged for inlining = 17, calls inlined = 31, statements flattened = 289 [2023-11-19 05:06:14,890 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:06:14,891 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:06:14,891 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:06:14,891 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:06:14,902 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:14" (1/1) ... [2023-11-19 05:06:14,902 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:14" (1/1) ... [2023-11-19 05:06:14,908 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:14" (1/1) ... [2023-11-19 05:06:14,908 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:14" (1/1) ... [2023-11-19 05:06:14,921 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:14" (1/1) ... [2023-11-19 05:06:14,927 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:14" (1/1) ... [2023-11-19 05:06:14,930 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:14" (1/1) ... [2023-11-19 05:06:14,933 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:14" (1/1) ... [2023-11-19 05:06:14,939 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:06:14,940 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:06:14,940 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:06:14,940 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:06:14,942 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:14" (1/1) ... [2023-11-19 05:06:14,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:06:14,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:06:14,993 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:06:15,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:06:15,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:06:15,044 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 05:06:15,044 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 05:06:15,045 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 05:06:15,045 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 05:06:15,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:06:15,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 05:06:15,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 05:06:15,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 05:06:15,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:06:15,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:06:15,048 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 05:06:15,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 05:06:15,050 WARN L210 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 05:06:15,190 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:06:15,192 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:06:15,748 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:06:15,769 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:06:15,769 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 05:06:15,776 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:06:15 BoogieIcfgContainer [2023-11-19 05:06:15,776 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:06:15,779 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:06:15,779 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:06:15,783 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:06:15,783 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:06:14" (1/3) ... [2023-11-19 05:06:15,784 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b70d243 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:06:15, skipping insertion in model container [2023-11-19 05:06:15,785 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:14" (2/3) ... [2023-11-19 05:06:15,785 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b70d243 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:06:15, skipping insertion in model container [2023-11-19 05:06:15,785 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:06:15" (3/3) ... [2023-11-19 05:06:15,787 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-1.wvr.c [2023-11-19 05:06:15,797 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 05:06:15,808 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:06:15,809 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:06:15,809 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 05:06:16,083 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 05:06:16,144 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-19 05:06:16,167 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 384 places, 405 transitions, 824 flow [2023-11-19 05:06:16,172 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 384 places, 405 transitions, 824 flow [2023-11-19 05:06:16,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 384 places, 405 transitions, 824 flow [2023-11-19 05:06:16,424 INFO L124 PetriNetUnfolderBase]: 28/403 cut-off events. [2023-11-19 05:06:16,425 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 05:06:16,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 403 events. 28/403 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 906 event pairs, 0 based on Foata normal form. 0/374 useless extension candidates. Maximal degree in co-relation 273. Up to 2 conditions per place. [2023-11-19 05:06:16,473 INFO L119 LiptonReduction]: Number of co-enabled transitions 38252 [2023-11-19 05:06:30,000 INFO L134 LiptonReduction]: Checked pairs total: 32260 [2023-11-19 05:06:30,000 INFO L136 LiptonReduction]: Total number of compositions: 486 [2023-11-19 05:06:30,009 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 21 transitions, 56 flow [2023-11-19 05:06:30,024 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 43 states, 42 states have (on average 2.238095238095238) internal successors, (94), 42 states have internal predecessors, (94), 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) [2023-11-19 05:06:30,049 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:06:30,057 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;@4a33396, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:06:30,058 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-19 05:06:30,060 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 42 states have (on average 2.238095238095238) internal successors, (94), 42 states have internal predecessors, (94), 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) [2023-11-19 05:06:30,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-19 05:06:30,066 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:30,067 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:06:30,067 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 05:06:30,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:30,072 INFO L85 PathProgramCache]: Analyzing trace with hash 241138947, now seen corresponding path program 1 times [2023-11-19 05:06:30,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:30,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770657444] [2023-11-19 05:06:30,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:30,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:30,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:06:30,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:30,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770657444] [2023-11-19 05:06:30,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770657444] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:06:30,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:06:30,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:06:30,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940185094] [2023-11-19 05:06:30,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:06:30,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:06:30,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:06:30,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:06:30,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:06:30,749 INFO L87 Difference]: Start difference. First operand has 43 states, 42 states have (on average 2.238095238095238) internal successors, (94), 42 states have internal predecessors, (94), 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 5 states, 4 states have (on average 3.5) internal successors, (14), 5 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) [2023-11-19 05:06:30,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:06:30,881 INFO L93 Difference]: Finished difference Result 104 states and 254 transitions. [2023-11-19 05:06:30,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:06:30,883 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 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 [2023-11-19 05:06:30,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:06:30,894 INFO L225 Difference]: With dead ends: 104 [2023-11-19 05:06:30,895 INFO L226 Difference]: Without dead ends: 99 [2023-11-19 05:06:30,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:06:30,900 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 31 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:06:30,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 8 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:06:30,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-11-19 05:06:30,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 65. [2023-11-19 05:06:30,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.265625) internal successors, (145), 64 states have internal predecessors, (145), 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) [2023-11-19 05:06:30,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 145 transitions. [2023-11-19 05:06:30,956 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 145 transitions. Word has length 14 [2023-11-19 05:06:30,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:06:30,957 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 145 transitions. [2023-11-19 05:06:30,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 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) [2023-11-19 05:06:30,962 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 145 transitions. [2023-11-19 05:06:30,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 05:06:30,963 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:30,964 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:06:30,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:06:30,964 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 05:06:30,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:30,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1912331486, now seen corresponding path program 1 times [2023-11-19 05:06:30,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:30,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766124888] [2023-11-19 05:06:30,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:30,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:31,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:31,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:06:31,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:31,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766124888] [2023-11-19 05:06:31,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766124888] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:06:31,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:06:31,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:06:31,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450773512] [2023-11-19 05:06:31,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:06:31,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:06:31,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:06:31,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:06:31,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:06:31,300 INFO L87 Difference]: Start difference. First operand 65 states and 145 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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) [2023-11-19 05:06:31,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:06:31,380 INFO L93 Difference]: Finished difference Result 111 states and 244 transitions. [2023-11-19 05:06:31,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:06:31,380 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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 [2023-11-19 05:06:31,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:06:31,382 INFO L225 Difference]: With dead ends: 111 [2023-11-19 05:06:31,382 INFO L226 Difference]: Without dead ends: 101 [2023-11-19 05:06:31,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:06:31,384 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:06:31,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 6 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:06:31,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-19 05:06:31,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2023-11-19 05:06:31,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.26) internal successors, (226), 100 states have internal predecessors, (226), 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) [2023-11-19 05:06:31,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 226 transitions. [2023-11-19 05:06:31,398 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 226 transitions. Word has length 15 [2023-11-19 05:06:31,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:06:31,399 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 226 transitions. [2023-11-19 05:06:31,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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) [2023-11-19 05:06:31,400 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 226 transitions. [2023-11-19 05:06:31,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 05:06:31,401 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:31,402 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:06:31,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:06:31,402 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 05:06:31,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:31,403 INFO L85 PathProgramCache]: Analyzing trace with hash -514330124, now seen corresponding path program 1 times [2023-11-19 05:06:31,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:31,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756049390] [2023-11-19 05:06:31,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:31,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:31,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:31,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:06:31,553 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:31,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756049390] [2023-11-19 05:06:31,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756049390] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:06:31,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:06:31,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:06:31,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889539612] [2023-11-19 05:06:31,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:06:31,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:06:31,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:06:31,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:06:31,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:06:31,563 INFO L87 Difference]: Start difference. First operand 101 states and 226 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:06:31,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:06:31,629 INFO L93 Difference]: Finished difference Result 83 states and 174 transitions. [2023-11-19 05:06:31,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:06:31,630 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-19 05:06:31,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:06:31,633 INFO L225 Difference]: With dead ends: 83 [2023-11-19 05:06:31,633 INFO L226 Difference]: Without dead ends: 66 [2023-11-19 05:06:31,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:06:31,638 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:06:31,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 6 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:06:31,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-19 05:06:31,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2023-11-19 05:06:31,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.246153846153846) internal successors, (146), 65 states have internal predecessors, (146), 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) [2023-11-19 05:06:31,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 146 transitions. [2023-11-19 05:06:31,663 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 146 transitions. Word has length 16 [2023-11-19 05:06:31,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:06:31,664 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 146 transitions. [2023-11-19 05:06:31,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:06:31,665 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 146 transitions. [2023-11-19 05:06:31,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 05:06:31,666 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:31,666 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:06:31,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:06:31,667 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 05:06:31,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:31,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1712391475, now seen corresponding path program 1 times [2023-11-19 05:06:31,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:31,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741987461] [2023-11-19 05:06:31,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:31,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:31,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:31,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:06:31,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:31,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741987461] [2023-11-19 05:06:31,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741987461] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:06:31,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484776480] [2023-11-19 05:06:31,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:31,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:06:31,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:06:31,803 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:06:31,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:06:31,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:31,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 05:06:31,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:06:32,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:06:32,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:06:32,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:06:32,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484776480] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 05:06:32,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 05:06:32,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-19 05:06:32,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946072758] [2023-11-19 05:06:32,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:06:32,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:06:32,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:06:32,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:06:32,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-19 05:06:32,069 INFO L87 Difference]: Start difference. First operand 66 states and 146 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:06:32,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:06:32,132 INFO L93 Difference]: Finished difference Result 60 states and 134 transitions. [2023-11-19 05:06:32,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:06:32,133 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-19 05:06:32,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:06:32,135 INFO L225 Difference]: With dead ends: 60 [2023-11-19 05:06:32,136 INFO L226 Difference]: Without dead ends: 60 [2023-11-19 05:06:32,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-19 05:06:32,141 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 30 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:06:32,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 3 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:06:32,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-19 05:06:32,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 52. [2023-11-19 05:06:32,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.235294117647059) internal successors, (114), 51 states have internal predecessors, (114), 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) [2023-11-19 05:06:32,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 114 transitions. [2023-11-19 05:06:32,158 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 114 transitions. Word has length 16 [2023-11-19 05:06:32,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:06:32,159 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 114 transitions. [2023-11-19 05:06:32,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:06:32,159 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 114 transitions. [2023-11-19 05:06:32,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-19 05:06:32,160 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:32,160 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:06:32,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:06:32,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:06:32,378 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 05:06:32,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:32,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1388842921, now seen corresponding path program 1 times [2023-11-19 05:06:32,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:32,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361057300] [2023-11-19 05:06:32,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:32,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:32,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:32,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:06:32,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:32,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361057300] [2023-11-19 05:06:32,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361057300] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:06:32,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959979796] [2023-11-19 05:06:32,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:32,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:06:32,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:06:32,548 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:06:32,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:06:32,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:32,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 05:06:32,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:06:32,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:06:32,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:06:32,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:06:32,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959979796] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 05:06:32,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 05:06:32,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-19 05:06:32,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28355843] [2023-11-19 05:06:32,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:06:32,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:06:32,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:06:32,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:06:32,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-19 05:06:32,806 INFO L87 Difference]: Start difference. First operand 52 states and 114 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2023-11-19 05:06:32,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:06:32,864 INFO L93 Difference]: Finished difference Result 64 states and 143 transitions. [2023-11-19 05:06:32,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:06:32,865 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 17 [2023-11-19 05:06:32,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:06:32,867 INFO L225 Difference]: With dead ends: 64 [2023-11-19 05:06:32,868 INFO L226 Difference]: Without dead ends: 64 [2023-11-19 05:06:32,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-19 05:06:32,869 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 48 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:06:32,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 3 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:06:32,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-19 05:06:32,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-11-19 05:06:32,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.2698412698412698) internal successors, (143), 63 states have internal predecessors, (143), 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) [2023-11-19 05:06:32,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 143 transitions. [2023-11-19 05:06:32,878 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 143 transitions. Word has length 17 [2023-11-19 05:06:32,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:06:32,878 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 143 transitions. [2023-11-19 05:06:32,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2023-11-19 05:06:32,879 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 143 transitions. [2023-11-19 05:06:32,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 05:06:32,885 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:32,886 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:06:32,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:06:33,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:06:33,107 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 05:06:33,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:33,109 INFO L85 PathProgramCache]: Analyzing trace with hash -693246660, now seen corresponding path program 1 times [2023-11-19 05:06:33,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:33,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257155985] [2023-11-19 05:06:33,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:33,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:33,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:34,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:06:34,280 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:34,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257155985] [2023-11-19 05:06:34,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257155985] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:06:34,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301960759] [2023-11-19 05:06:34,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:34,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:06:34,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:06:34,284 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:06:34,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:06:34,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:34,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-19 05:06:34,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:06:34,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 05:06:34,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 05:06:34,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:06:34,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-19 05:06:34,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 61 [2023-11-19 05:06:35,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:06:35,011 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:06:35,395 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_106 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_106) c_~A~0.base) (+ c_~A~0.offset (* c_~j~0 4))))) (or (< (+ c_~bag2~0 .cse0 2147483648) 0) (= c_~sum1~0 (+ c_~bag2~0 .cse0 c_~sum2~0)) (< 2147483647 (+ c_~bag2~0 .cse0))))) is different from false [2023-11-19 05:06:35,984 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_106 (Array Int Int)) (v_ArrVal_105 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_105))) (let ((.cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_106) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (or (< (+ .cse0 2147483648) 0) (= .cse0 (select (select .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (< 2147483647 .cse0))))) is different from false [2023-11-19 05:06:35,997 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:06:35,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 61 [2023-11-19 05:06:36,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 488 treesize of output 440 [2023-11-19 05:06:36,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 61 [2023-11-19 05:06:36,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 70 [2023-11-19 05:06:36,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-11-19 05:06:36,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301960759] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:06:36,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1396694196] [2023-11-19 05:06:36,092 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-19 05:06:36,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:06:36,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2023-11-19 05:06:36,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827486822] [2023-11-19 05:06:36,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:06:36,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-19 05:06:36,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:06:36,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-19 05:06:36,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=349, Unknown=6, NotChecked=78, Total=506 [2023-11-19 05:06:36,097 INFO L87 Difference]: Start difference. First operand 64 states and 143 transitions. Second operand has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 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) [2023-11-19 05:06:36,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:06:36,620 INFO L93 Difference]: Finished difference Result 109 states and 252 transitions. [2023-11-19 05:06:36,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 05:06:36,620 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-19 05:06:36,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:06:36,622 INFO L225 Difference]: With dead ends: 109 [2023-11-19 05:06:36,622 INFO L226 Difference]: Without dead ends: 104 [2023-11-19 05:06:36,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=542, Unknown=6, NotChecked=98, Total=756 [2023-11-19 05:06:36,623 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 47 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:06:36,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 51 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 402 Invalid, 0 Unknown, 107 Unchecked, 0.3s Time] [2023-11-19 05:06:36,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-11-19 05:06:36,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 86. [2023-11-19 05:06:36,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.2705882352941176) internal successors, (193), 85 states have internal predecessors, (193), 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) [2023-11-19 05:06:36,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 193 transitions. [2023-11-19 05:06:36,629 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 193 transitions. Word has length 18 [2023-11-19 05:06:36,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:06:36,630 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 193 transitions. [2023-11-19 05:06:36,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 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) [2023-11-19 05:06:36,630 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 193 transitions. [2023-11-19 05:06:36,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 05:06:36,631 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:36,631 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:06:36,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:06:36,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:06:36,860 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 05:06:36,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:36,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1642141254, now seen corresponding path program 2 times [2023-11-19 05:06:36,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:36,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278957052] [2023-11-19 05:06:36,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:36,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:36,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:37,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:06:37,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:37,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278957052] [2023-11-19 05:06:37,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278957052] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:06:37,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333688870] [2023-11-19 05:06:37,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 05:06:37,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:06:37,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:06:37,748 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:06:37,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:06:37,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 05:06:37,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:06:37,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-19 05:06:37,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:06:37,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 05:06:37,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 05:06:38,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:06:38,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-19 05:06:38,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 61 [2023-11-19 05:06:38,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:06:38,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:06:39,171 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_133 (Array Int Int)) (v_ArrVal_134 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_133))) (let ((.cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_134) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (or (< (+ .cse0 2147483648) 0) (= .cse0 (select (select .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (< 2147483647 .cse0))))) is different from false [2023-11-19 05:06:39,183 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:06:39,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 61 [2023-11-19 05:06:39,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 228 treesize of output 204 [2023-11-19 05:06:39,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 122 [2023-11-19 05:06:39,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 57 [2023-11-19 05:06:39,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-11-19 05:06:39,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333688870] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:06:39,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2142769976] [2023-11-19 05:06:39,250 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-19 05:06:39,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:06:39,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2023-11-19 05:06:39,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426133698] [2023-11-19 05:06:39,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:06:39,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 05:06:39,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:06:39,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 05:06:39,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=332, Unknown=6, NotChecked=38, Total=462 [2023-11-19 05:06:39,255 INFO L87 Difference]: Start difference. First operand 86 states and 193 transitions. Second operand has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 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) [2023-11-19 05:06:39,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:06:39,571 INFO L93 Difference]: Finished difference Result 111 states and 259 transitions. [2023-11-19 05:06:39,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 05:06:39,572 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-19 05:06:39,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:06:39,573 INFO L225 Difference]: With dead ends: 111 [2023-11-19 05:06:39,573 INFO L226 Difference]: Without dead ends: 106 [2023-11-19 05:06:39,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=332, Unknown=6, NotChecked=38, Total=462 [2023-11-19 05:06:39,574 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 30 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:06:39,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 28 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 282 Invalid, 0 Unknown, 51 Unchecked, 0.3s Time] [2023-11-19 05:06:39,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-11-19 05:06:39,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 88. [2023-11-19 05:06:39,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.32183908045977) internal successors, (202), 87 states have internal predecessors, (202), 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) [2023-11-19 05:06:39,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 202 transitions. [2023-11-19 05:06:39,581 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 202 transitions. Word has length 18 [2023-11-19 05:06:39,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:06:39,581 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 202 transitions. [2023-11-19 05:06:39,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 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) [2023-11-19 05:06:39,582 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 202 transitions. [2023-11-19 05:06:39,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 05:06:39,583 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:39,583 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:06:39,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:06:39,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 05:06:39,805 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 05:06:39,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:39,806 INFO L85 PathProgramCache]: Analyzing trace with hash -687991790, now seen corresponding path program 3 times [2023-11-19 05:06:39,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:39,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142557217] [2023-11-19 05:06:39,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:39,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:39,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:40,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:06:40,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:40,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142557217] [2023-11-19 05:06:40,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142557217] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:06:40,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854633912] [2023-11-19 05:06:40,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 05:06:40,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:06:40,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:06:40,688 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:06:40,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 05:06:40,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 05:06:40,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:06:40,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-19 05:06:40,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:06:40,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 05:06:40,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 05:06:41,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:06:41,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-19 05:06:41,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 61 [2023-11-19 05:06:41,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:06:41,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:06:41,554 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_162 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_162) c_~A~0.base) (+ c_~A~0.offset (* c_~j~0 4))))) (or (= (+ c_~bag1~0 c_~sum1~0) (+ c_~bag2~0 .cse0 c_~sum2~0)) (< (+ c_~bag2~0 .cse0 2147483648) 0) (< 2147483647 (+ c_~bag2~0 .cse0))))) is different from false [2023-11-19 05:06:42,019 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_162 (Array Int Int)) (v_ArrVal_161 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_161))) (let ((.cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_162) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (or (< 2147483647 .cse0) (< (+ .cse0 2147483648) 0) (= .cse0 (select (select .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))))) is different from false [2023-11-19 05:06:42,030 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:06:42,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 61 [2023-11-19 05:06:42,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 488 treesize of output 440 [2023-11-19 05:06:42,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2023-11-19 05:06:42,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 50 [2023-11-19 05:06:42,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-11-19 05:06:42,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854633912] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:06:42,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1186723629] [2023-11-19 05:06:42,076 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-19 05:06:42,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:06:42,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-11-19 05:06:42,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82179282] [2023-11-19 05:06:42,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:06:42,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-19 05:06:42,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:06:42,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-19 05:06:42,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=382, Unknown=2, NotChecked=82, Total=552 [2023-11-19 05:06:42,079 INFO L87 Difference]: Start difference. First operand 88 states and 202 transitions. Second operand has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 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) [2023-11-19 05:06:42,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:06:42,560 INFO L93 Difference]: Finished difference Result 115 states and 272 transitions. [2023-11-19 05:06:42,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 05:06:42,561 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-19 05:06:42,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:06:42,563 INFO L225 Difference]: With dead ends: 115 [2023-11-19 05:06:42,563 INFO L226 Difference]: Without dead ends: 110 [2023-11-19 05:06:42,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=130, Invalid=578, Unknown=2, NotChecked=102, Total=812 [2023-11-19 05:06:42,564 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 51 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:06:42,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 40 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 360 Invalid, 0 Unknown, 113 Unchecked, 0.3s Time] [2023-11-19 05:06:42,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-11-19 05:06:42,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 88. [2023-11-19 05:06:42,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.32183908045977) internal successors, (202), 87 states have internal predecessors, (202), 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) [2023-11-19 05:06:42,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 202 transitions. [2023-11-19 05:06:42,570 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 202 transitions. Word has length 18 [2023-11-19 05:06:42,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:06:42,571 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 202 transitions. [2023-11-19 05:06:42,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 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) [2023-11-19 05:06:42,571 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 202 transitions. [2023-11-19 05:06:42,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 05:06:42,572 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:42,572 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:06:42,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 05:06:42,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:06:42,793 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 05:06:42,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:42,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1035544452, now seen corresponding path program 4 times [2023-11-19 05:06:42,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:42,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469781810] [2023-11-19 05:06:42,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:42,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:43,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:06:43,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:43,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469781810] [2023-11-19 05:06:43,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469781810] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:06:43,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724017705] [2023-11-19 05:06:43,863 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 05:06:43,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:06:43,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:06:43,865 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:06:43,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 05:06:43,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:43,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-19 05:06:43,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:06:43,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:06:43,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-19 05:06:44,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2023-11-19 05:06:44,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 05:06:44,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2023-11-19 05:06:44,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 47 [2023-11-19 05:06:44,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:06:44,432 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:06:45,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:06:45,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724017705] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:06:45,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1159377189] [2023-11-19 05:06:45,238 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-19 05:06:45,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:06:45,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 19 [2023-11-19 05:06:45,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135214497] [2023-11-19 05:06:45,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:06:45,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 05:06:45,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:06:45,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 05:06:45,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=292, Unknown=4, NotChecked=0, Total=380 [2023-11-19 05:06:45,243 INFO L87 Difference]: Start difference. First operand 88 states and 202 transitions. Second operand has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 20 states have internal predecessors, (47), 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) [2023-11-19 05:06:45,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:06:45,623 INFO L93 Difference]: Finished difference Result 115 states and 275 transitions. [2023-11-19 05:06:45,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 05:06:45,624 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-19 05:06:45,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:06:45,625 INFO L225 Difference]: With dead ends: 115 [2023-11-19 05:06:45,625 INFO L226 Difference]: Without dead ends: 110 [2023-11-19 05:06:45,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=437, Unknown=4, NotChecked=0, Total=552 [2023-11-19 05:06:45,627 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 50 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:06:45,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 29 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:06:45,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-11-19 05:06:45,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 96. [2023-11-19 05:06:45,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.442105263157895) internal successors, (232), 95 states have internal predecessors, (232), 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) [2023-11-19 05:06:45,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 232 transitions. [2023-11-19 05:06:45,633 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 232 transitions. Word has length 18 [2023-11-19 05:06:45,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:06:45,633 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 232 transitions. [2023-11-19 05:06:45,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 20 states have internal predecessors, (47), 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) [2023-11-19 05:06:45,634 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 232 transitions. [2023-11-19 05:06:45,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 05:06:45,634 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:45,635 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:06:45,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 05:06:45,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:06:45,848 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 05:06:45,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:45,849 INFO L85 PathProgramCache]: Analyzing trace with hash 929289800, now seen corresponding path program 5 times [2023-11-19 05:06:45,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:45,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442205956] [2023-11-19 05:06:45,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:45,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:45,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:46,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:06:46,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:46,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442205956] [2023-11-19 05:06:46,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442205956] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:06:46,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164202832] [2023-11-19 05:06:46,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 05:06:46,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:06:46,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:06:46,843 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:06:46,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 05:06:46,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 05:06:46,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:06:46,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-19 05:06:46,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:06:47,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 05:06:47,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 05:06:47,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:06:47,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-19 05:06:47,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 55 [2023-11-19 05:06:47,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:06:47,543 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:06:48,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:06:48,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164202832] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:06:48,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2004445279] [2023-11-19 05:06:48,474 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-19 05:06:48,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:06:48,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 21 [2023-11-19 05:06:48,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898932757] [2023-11-19 05:06:48,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:06:48,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 05:06:48,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:06:48,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 05:06:48,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=351, Unknown=1, NotChecked=0, Total=462 [2023-11-19 05:06:48,478 INFO L87 Difference]: Start difference. First operand 96 states and 232 transitions. Second operand has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 22 states have internal predecessors, (47), 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) [2023-11-19 05:06:49,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:06:49,924 INFO L93 Difference]: Finished difference Result 210 states and 506 transitions. [2023-11-19 05:06:49,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-19 05:06:49,925 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-19 05:06:49,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:06:49,927 INFO L225 Difference]: With dead ends: 210 [2023-11-19 05:06:49,927 INFO L226 Difference]: Without dead ends: 205 [2023-11-19 05:06:49,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=236, Invalid=751, Unknown=5, NotChecked=0, Total=992 [2023-11-19 05:06:49,929 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 98 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 31 mSolverCounterUnsat, 19 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 19 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 05:06:49,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 52 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 416 Invalid, 19 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 05:06:49,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-11-19 05:06:49,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 135. [2023-11-19 05:06:49,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.5074626865671643) internal successors, (336), 134 states have internal predecessors, (336), 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) [2023-11-19 05:06:49,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 336 transitions. [2023-11-19 05:06:49,941 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 336 transitions. Word has length 18 [2023-11-19 05:06:49,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:06:49,941 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 336 transitions. [2023-11-19 05:06:49,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 22 states have internal predecessors, (47), 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) [2023-11-19 05:06:49,942 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 336 transitions. [2023-11-19 05:06:49,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 05:06:49,943 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:49,943 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:06:49,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 05:06:50,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:06:50,144 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 05:06:50,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:50,144 INFO L85 PathProgramCache]: Analyzing trace with hash 177840490, now seen corresponding path program 6 times [2023-11-19 05:06:50,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:50,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900813050] [2023-11-19 05:06:50,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:50,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:50,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:50,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:06:50,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:50,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900813050] [2023-11-19 05:06:50,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900813050] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:06:50,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118523166] [2023-11-19 05:06:50,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 05:06:50,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:06:50,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:06:50,936 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:06:50,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 05:06:51,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 05:06:51,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:06:51,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-19 05:06:51,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:06:51,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-11-19 05:06:51,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2023-11-19 05:06:51,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2023-11-19 05:06:51,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2023-11-19 05:06:51,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 47 [2023-11-19 05:06:51,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:06:51,441 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:06:52,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:06:52,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118523166] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:06:52,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1379712398] [2023-11-19 05:06:52,194 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-19 05:06:52,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:06:52,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 20 [2023-11-19 05:06:52,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736021865] [2023-11-19 05:06:52,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:06:52,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-19 05:06:52,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:06:52,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-19 05:06:52,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=336, Unknown=5, NotChecked=0, Total=420 [2023-11-19 05:06:52,198 INFO L87 Difference]: Start difference. First operand 135 states and 336 transitions. Second operand has 21 states, 20 states have (on average 2.45) internal successors, (49), 21 states have internal predecessors, (49), 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) [2023-11-19 05:06:52,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:06:52,539 INFO L93 Difference]: Finished difference Result 160 states and 387 transitions. [2023-11-19 05:06:52,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 05:06:52,540 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.45) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-19 05:06:52,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:06:52,542 INFO L225 Difference]: With dead ends: 160 [2023-11-19 05:06:52,542 INFO L226 Difference]: Without dead ends: 155 [2023-11-19 05:06:52,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=492, Unknown=5, NotChecked=0, Total=600 [2023-11-19 05:06:52,543 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 38 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:06:52,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 40 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:06:52,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-11-19 05:06:52,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 141. [2023-11-19 05:06:52,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.4642857142857144) internal successors, (345), 140 states have internal predecessors, (345), 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) [2023-11-19 05:06:52,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2023-11-19 05:06:52,550 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 18 [2023-11-19 05:06:52,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:06:52,550 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2023-11-19 05:06:52,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.45) internal successors, (49), 21 states have internal predecessors, (49), 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) [2023-11-19 05:06:52,551 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2023-11-19 05:06:52,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 05:06:52,552 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:52,552 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:06:52,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 05:06:52,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:06:52,764 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 05:06:52,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:52,765 INFO L85 PathProgramCache]: Analyzing trace with hash -813514231, now seen corresponding path program 7 times [2023-11-19 05:06:52,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:52,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243803330] [2023-11-19 05:06:52,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:52,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:52,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:52,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:06:52,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:52,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243803330] [2023-11-19 05:06:52,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243803330] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:06:52,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812336069] [2023-11-19 05:06:52,922 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 05:06:52,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:06:52,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:06:52,923 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:06:52,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 05:06:53,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:53,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 05:06:53,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:06:53,212 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:06:53,212 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:06:53,403 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-19 05:06:53,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 258 treesize of output 162 [2023-11-19 05:06:53,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:06:53,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812336069] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:06:53,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [995279220] [2023-11-19 05:06:53,547 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-19 05:06:53,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:06:53,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-11-19 05:06:53,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049697466] [2023-11-19 05:06:53,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:06:53,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 05:06:53,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:06:53,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 05:06:53,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-19 05:06:53,552 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 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) [2023-11-19 05:06:53,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:06:53,738 INFO L93 Difference]: Finished difference Result 206 states and 458 transitions. [2023-11-19 05:06:53,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:06:53,739 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 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 19 [2023-11-19 05:06:53,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:06:53,741 INFO L225 Difference]: With dead ends: 206 [2023-11-19 05:06:53,741 INFO L226 Difference]: Without dead ends: 192 [2023-11-19 05:06:53,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-19 05:06:53,742 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 59 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:06:53,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 29 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:06:53,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-11-19 05:06:53,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 174. [2023-11-19 05:06:53,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.346820809248555) internal successors, (406), 173 states have internal predecessors, (406), 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) [2023-11-19 05:06:53,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 406 transitions. [2023-11-19 05:06:53,749 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 406 transitions. Word has length 19 [2023-11-19 05:06:53,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:06:53,750 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 406 transitions. [2023-11-19 05:06:53,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 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) [2023-11-19 05:06:53,750 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 406 transitions. [2023-11-19 05:06:53,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-19 05:06:53,751 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:53,751 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:06:53,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 05:06:53,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 05:06:53,971 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 05:06:53,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:53,971 INFO L85 PathProgramCache]: Analyzing trace with hash -547622933, now seen corresponding path program 8 times [2023-11-19 05:06:53,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:53,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472541329] [2023-11-19 05:06:53,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:53,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:53,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:54,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:06:54,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:54,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472541329] [2023-11-19 05:06:54,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472541329] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:06:54,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659901929] [2023-11-19 05:06:54,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 05:06:54,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:06:54,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:06:54,093 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:06:54,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 05:06:54,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 05:06:54,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:06:54,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 05:06:54,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:06:54,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:06:54,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:06:54,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 83 [2023-11-19 05:06:54,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:06:54,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659901929] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:06:54,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1190596387] [2023-11-19 05:06:54,428 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-19 05:06:54,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:06:54,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-19 05:06:54,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53684701] [2023-11-19 05:06:54,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:06:54,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 05:06:54,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:06:54,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 05:06:54,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-19 05:06:54,432 INFO L87 Difference]: Start difference. First operand 174 states and 406 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 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) [2023-11-19 05:06:54,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:06:54,531 INFO L93 Difference]: Finished difference Result 142 states and 313 transitions. [2023-11-19 05:06:54,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:06:54,532 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-19 05:06:54,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:06:54,533 INFO L225 Difference]: With dead ends: 142 [2023-11-19 05:06:54,533 INFO L226 Difference]: Without dead ends: 101 [2023-11-19 05:06:54,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-19 05:06:54,534 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 62 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:06:54,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 17 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:06:54,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-19 05:06:54,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2023-11-19 05:06:54,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.33) internal successors, (233), 100 states have internal predecessors, (233), 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) [2023-11-19 05:06:54,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 233 transitions. [2023-11-19 05:06:54,540 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 233 transitions. Word has length 20 [2023-11-19 05:06:54,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:06:54,540 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 233 transitions. [2023-11-19 05:06:54,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 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) [2023-11-19 05:06:54,540 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 233 transitions. [2023-11-19 05:06:54,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-19 05:06:54,541 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:54,541 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:06:54,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 05:06:54,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 05:06:54,752 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 05:06:54,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:54,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1248605132, now seen corresponding path program 9 times [2023-11-19 05:06:54,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:54,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054033604] [2023-11-19 05:06:54,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:54,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:54,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:54,903 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 05:06:54,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:54,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054033604] [2023-11-19 05:06:54,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054033604] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:06:54,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598235273] [2023-11-19 05:06:54,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 05:06:54,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:06:54,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:06:54,906 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:06:54,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 05:06:55,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 05:06:55,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:06:55,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 05:06:55,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:06:55,145 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 05:06:55,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:06:55,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 83 [2023-11-19 05:06:55,289 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 05:06:55,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598235273] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:06:55,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1271240676] [2023-11-19 05:06:55,290 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-19 05:06:55,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:06:55,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-19 05:06:55,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349788888] [2023-11-19 05:06:55,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:06:55,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 05:06:55,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:06:55,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 05:06:55,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-11-19 05:06:55,294 INFO L87 Difference]: Start difference. First operand 101 states and 233 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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) [2023-11-19 05:06:55,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:06:55,416 INFO L93 Difference]: Finished difference Result 111 states and 256 transitions. [2023-11-19 05:06:55,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 05:06:55,416 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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 20 [2023-11-19 05:06:55,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:06:55,417 INFO L225 Difference]: With dead ends: 111 [2023-11-19 05:06:55,418 INFO L226 Difference]: Without dead ends: 111 [2023-11-19 05:06:55,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2023-11-19 05:06:55,419 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 74 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:06:55,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 17 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:06:55,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-11-19 05:06:55,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 85. [2023-11-19 05:06:55,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.2857142857142856) internal successors, (192), 84 states have internal predecessors, (192), 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) [2023-11-19 05:06:55,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 192 transitions. [2023-11-19 05:06:55,423 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 192 transitions. Word has length 20 [2023-11-19 05:06:55,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:06:55,424 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 192 transitions. [2023-11-19 05:06:55,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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) [2023-11-19 05:06:55,424 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 192 transitions. [2023-11-19 05:06:55,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-19 05:06:55,425 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:55,425 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:06:55,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 05:06:55,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-19 05:06:55,646 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 05:06:55,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:55,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1150538976, now seen corresponding path program 10 times [2023-11-19 05:06:55,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:55,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156229122] [2023-11-19 05:06:55,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:55,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:55,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:55,806 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 05:06:55,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:55,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156229122] [2023-11-19 05:06:55,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156229122] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:06:55,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973003397] [2023-11-19 05:06:55,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 05:06:55,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:06:55,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:06:55,812 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:06:55,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 05:06:55,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:55,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 05:06:55,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:06:56,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 05:06:56,109 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:06:56,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 109 [2023-11-19 05:06:56,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 05:06:56,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973003397] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:06:56,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [178504049] [2023-11-19 05:06:56,287 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-19 05:06:56,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:06:56,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2023-11-19 05:06:56,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836180195] [2023-11-19 05:06:56,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:06:56,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 05:06:56,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:06:56,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 05:06:56,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2023-11-19 05:06:56,291 INFO L87 Difference]: Start difference. First operand 85 states and 192 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 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) [2023-11-19 05:06:56,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:06:56,461 INFO L93 Difference]: Finished difference Result 101 states and 231 transitions. [2023-11-19 05:06:56,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 05:06:56,461 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-19 05:06:56,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:06:56,462 INFO L225 Difference]: With dead ends: 101 [2023-11-19 05:06:56,462 INFO L226 Difference]: Without dead ends: 101 [2023-11-19 05:06:56,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2023-11-19 05:06:56,463 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 39 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:06:56,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 23 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:06:56,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-19 05:06:56,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2023-11-19 05:06:56,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.31) internal successors, (231), 100 states have internal predecessors, (231), 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) [2023-11-19 05:06:56,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 231 transitions. [2023-11-19 05:06:56,475 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 231 transitions. Word has length 21 [2023-11-19 05:06:56,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:06:56,476 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 231 transitions. [2023-11-19 05:06:56,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 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) [2023-11-19 05:06:56,476 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 231 transitions. [2023-11-19 05:06:56,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-19 05:06:56,477 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:56,477 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:06:56,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 05:06:56,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fcbf2cb-ee73-4d2e-8c52-8ca5f1fe51a2/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-19 05:06:56,678 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 05:06:56,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:56,678 INFO L85 PathProgramCache]: Analyzing trace with hash -2104674139, now seen corresponding path program 11 times [2023-11-19 05:06:56,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:56,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53177684] [2023-11-19 05:06:56,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:56,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:56,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat