./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh --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 f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 16:03:11,019 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 16:03:11,091 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 16:03:11,096 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 16:03:11,097 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 16:03:11,124 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 16:03:11,125 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 16:03:11,125 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 16:03:11,126 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 16:03:11,127 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 16:03:11,127 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 16:03:11,128 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 16:03:11,128 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 16:03:11,129 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 16:03:11,129 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 16:03:11,130 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 16:03:11,131 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 16:03:11,131 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 16:03:11,132 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 16:03:11,132 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 16:03:11,133 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 16:03:11,134 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 16:03:11,135 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 16:03:11,136 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 16:03:11,136 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 16:03:11,137 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 16:03:11,137 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 16:03:11,138 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 16:03:11,138 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 16:03:11,138 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 16:03:11,139 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 16:03:11,139 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 16:03:11,139 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 16:03:11,140 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 16:03:11,140 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 16:03:11,140 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 16:03:11,141 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 16:03:11,141 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:03:11,141 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 16:03:11,141 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 16:03:11,141 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 16:03:11,142 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 16:03:11,142 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 16:03:11,142 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 16:03:11,142 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 16:03:11,143 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 16:03:11,143 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 16:03:11,143 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_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 [2023-12-02 16:03:11,402 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 16:03:11,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 16:03:11,430 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 16:03:11,431 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 16:03:11,432 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 16:03:11,433 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2023-12-02 16:03:14,269 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 16:03:14,434 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 16:03:14,434 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2023-12-02 16:03:14,444 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/data/0ae866ffc/4f49601eb4d04d48b79d1e904358852e/FLAG908ab6594 [2023-12-02 16:03:14,457 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/data/0ae866ffc/4f49601eb4d04d48b79d1e904358852e [2023-12-02 16:03:14,460 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 16:03:14,461 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 16:03:14,463 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 16:03:14,463 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 16:03:14,467 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 16:03:14,468 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:03:14" (1/1) ... [2023-12-02 16:03:14,469 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a6804ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:03:14, skipping insertion in model container [2023-12-02 16:03:14,470 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:03:14" (1/1) ... [2023-12-02 16:03:14,495 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 16:03:14,660 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_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c[3073,3086] [2023-12-02 16:03:14,673 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:03:14,684 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 16:03:14,711 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_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c[3073,3086] [2023-12-02 16:03:14,716 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:03:14,730 INFO L206 MainTranslator]: Completed translation [2023-12-02 16:03:14,730 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:03:14 WrapperNode [2023-12-02 16:03:14,731 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 16:03:14,732 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 16:03:14,732 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 16:03:14,732 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 16:03:14,738 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:03:14" (1/1) ... [2023-12-02 16:03:14,747 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:03:14" (1/1) ... [2023-12-02 16:03:14,779 INFO L138 Inliner]: procedures = 26, calls = 46, calls flagged for inlining = 16, calls inlined = 24, statements flattened = 282 [2023-12-02 16:03:14,780 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 16:03:14,781 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 16:03:14,781 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 16:03:14,781 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 16:03:14,790 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:03:14" (1/1) ... [2023-12-02 16:03:14,791 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:03:14" (1/1) ... [2023-12-02 16:03:14,796 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:03:14" (1/1) ... [2023-12-02 16:03:14,796 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:03:14" (1/1) ... [2023-12-02 16:03:14,808 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:03:14" (1/1) ... [2023-12-02 16:03:14,814 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:03:14" (1/1) ... [2023-12-02 16:03:14,817 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:03:14" (1/1) ... [2023-12-02 16:03:14,820 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:03:14" (1/1) ... [2023-12-02 16:03:14,825 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 16:03:14,827 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 16:03:14,827 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 16:03:14,827 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 16:03:14,828 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:03:14" (1/1) ... [2023-12-02 16:03:14,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:03:14,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:03:14,858 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 16:03:14,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 16:03:14,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 16:03:14,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 16:03:14,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 16:03:14,892 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 16:03:14,892 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-12-02 16:03:14,892 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-12-02 16:03:14,892 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-12-02 16:03:14,893 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-12-02 16:03:14,893 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-12-02 16:03:14,893 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-12-02 16:03:14,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 16:03:14,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 16:03:14,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 16:03:14,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 16:03:14,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 16:03:14,896 WARN L213 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-12-02 16:03:15,018 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 16:03:15,020 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 16:03:15,441 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 16:03:15,830 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 16:03:15,830 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-12-02 16:03:15,831 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:03:15 BoogieIcfgContainer [2023-12-02 16:03:15,831 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 16:03:15,834 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 16:03:15,834 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 16:03:15,837 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 16:03:15,837 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:03:14" (1/3) ... [2023-12-02 16:03:15,838 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dc44a29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:03:15, skipping insertion in model container [2023-12-02 16:03:15,838 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:03:14" (2/3) ... [2023-12-02 16:03:15,838 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dc44a29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:03:15, skipping insertion in model container [2023-12-02 16:03:15,839 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:03:15" (3/3) ... [2023-12-02 16:03:15,840 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-trans.wvr.c [2023-12-02 16:03:15,848 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-12-02 16:03:15,857 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 16:03:15,857 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 16:03:15,857 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-02 16:03:15,920 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-12-02 16:03:15,949 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 37 places, 33 transitions, 87 flow [2023-12-02 16:03:15,980 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 110 states, 109 states have (on average 3.0458715596330275) internal successors, (332), 109 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:03:15,997 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 16:03:16,003 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;@34f78d82, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 16:03:16,003 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-12-02 16:03:16,006 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 109 states have (on average 3.0458715596330275) internal successors, (332), 109 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:03:16,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 16:03:16,016 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:03:16,017 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:03:16,017 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-12-02 16:03:16,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:03:16,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1126116390, now seen corresponding path program 1 times [2023-12-02 16:03:16,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:03:16,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560113412] [2023-12-02 16:03:16,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:16,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:03:16,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:03:16,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:03:16,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:03:16,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560113412] [2023-12-02 16:03:16,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560113412] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:03:16,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:03:16,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:03:16,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675667170] [2023-12-02 16:03:16,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:03:16,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:03:16,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:03:16,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:03:16,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:03:16,453 INFO L87 Difference]: Start difference. First operand has 110 states, 109 states have (on average 3.0458715596330275) internal successors, (332), 109 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2023-12-02 16:03:16,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:03:16,542 INFO L93 Difference]: Finished difference Result 113 states and 335 transitions. [2023-12-02 16:03:16,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:03:16,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 23 [2023-12-02 16:03:16,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:03:16,556 INFO L225 Difference]: With dead ends: 113 [2023-12-02 16:03:16,556 INFO L226 Difference]: Without dead ends: 113 [2023-12-02 16:03:16,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:03:16,561 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:03:16,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:03:16,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-12-02 16:03:16,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2023-12-02 16:03:16,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.9910714285714284) internal successors, (335), 112 states have internal predecessors, (335), 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) [2023-12-02 16:03:16,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 335 transitions. [2023-12-02 16:03:16,625 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 335 transitions. Word has length 23 [2023-12-02 16:03:16,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:03:16,625 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 335 transitions. [2023-12-02 16:03:16,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2023-12-02 16:03:16,626 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 335 transitions. [2023-12-02 16:03:16,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 16:03:16,628 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:03:16,628 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:03:16,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 16:03:16,629 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-12-02 16:03:16,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:03:16,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1384506192, now seen corresponding path program 1 times [2023-12-02 16:03:16,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:03:16,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142243329] [2023-12-02 16:03:16,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:16,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:03:16,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:03:16,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 16:03:16,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:03:16,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142243329] [2023-12-02 16:03:16,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142243329] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:03:16,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:03:16,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:03:16,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663800376] [2023-12-02 16:03:16,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:03:16,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:03:16,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:03:16,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:03:16,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:03:16,840 INFO L87 Difference]: Start difference. First operand 113 states and 335 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:03:16,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:03:16,943 INFO L93 Difference]: Finished difference Result 166 states and 506 transitions. [2023-12-02 16:03:16,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:03:16,944 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-02 16:03:16,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:03:16,947 INFO L225 Difference]: With dead ends: 166 [2023-12-02 16:03:16,947 INFO L226 Difference]: Without dead ends: 139 [2023-12-02 16:03:16,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:03:16,949 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 12 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:03:16,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:03:16,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-12-02 16:03:16,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2023-12-02 16:03:16,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 3.0434782608695654) internal successors, (420), 138 states have internal predecessors, (420), 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) [2023-12-02 16:03:16,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 420 transitions. [2023-12-02 16:03:16,966 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 420 transitions. Word has length 26 [2023-12-02 16:03:16,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:03:16,966 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 420 transitions. [2023-12-02 16:03:16,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:03:16,967 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 420 transitions. [2023-12-02 16:03:16,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 16:03:16,969 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:03:16,969 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:03:16,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 16:03:16,970 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-12-02 16:03:16,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:03:16,970 INFO L85 PathProgramCache]: Analyzing trace with hash -434835464, now seen corresponding path program 1 times [2023-12-02 16:03:16,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:03:16,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942580441] [2023-12-02 16:03:16,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:16,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:03:17,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:03:17,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 16:03:17,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:03:17,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942580441] [2023-12-02 16:03:17,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942580441] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:03:17,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271182725] [2023-12-02 16:03:17,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:17,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:03:17,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:03:17,133 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:03:17,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 16:03:17,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:03:17,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 16:03:17,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:03:17,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 16:03:17,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:03:17,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 16:03:17,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271182725] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:03:17,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1037414577] [2023-12-02 16:03:17,406 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) [2023-12-02 16:03:17,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:03:17,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-12-02 16:03:17,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998201538] [2023-12-02 16:03:17,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:03:17,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 16:03:17,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:03:17,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 16:03:17,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:03:17,410 INFO L87 Difference]: Start difference. First operand 139 states and 420 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 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) [2023-12-02 16:03:17,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:03:17,558 INFO L93 Difference]: Finished difference Result 148 states and 429 transitions. [2023-12-02 16:03:17,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:03:17,559 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-12-02 16:03:17,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:03:17,561 INFO L225 Difference]: With dead ends: 148 [2023-12-02 16:03:17,562 INFO L226 Difference]: Without dead ends: 148 [2023-12-02 16:03:17,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:03:17,563 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:03:17,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:03:17,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-12-02 16:03:17,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2023-12-02 16:03:17,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.9183673469387754) internal successors, (429), 147 states have internal predecessors, (429), 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) [2023-12-02 16:03:17,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 429 transitions. [2023-12-02 16:03:17,578 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 429 transitions. Word has length 27 [2023-12-02 16:03:17,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:03:17,578 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 429 transitions. [2023-12-02 16:03:17,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 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) [2023-12-02 16:03:17,579 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 429 transitions. [2023-12-02 16:03:17,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-02 16:03:17,581 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:03:17,581 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:03:17,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 16:03:17,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:03:17,785 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-12-02 16:03:17,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:03:17,785 INFO L85 PathProgramCache]: Analyzing trace with hash -15892126, now seen corresponding path program 2 times [2023-12-02 16:03:17,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:03:17,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853703759] [2023-12-02 16:03:17,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:17,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:03:17,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:03:17,993 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 16:03:17,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:03:17,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853703759] [2023-12-02 16:03:17,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853703759] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:03:17,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342861686] [2023-12-02 16:03:17,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 16:03:17,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:03:17,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:03:17,995 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:03:18,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 16:03:18,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-12-02 16:03:18,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:03:18,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 16:03:18,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:03:18,190 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-02 16:03:18,191 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:03:18,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342861686] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:03:18,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:03:18,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-12-02 16:03:18,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483491949] [2023-12-02 16:03:18,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:03:18,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:03:18,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:03:18,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:03:18,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-12-02 16:03:18,193 INFO L87 Difference]: Start difference. First operand 148 states and 429 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:03:18,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:03:18,348 INFO L93 Difference]: Finished difference Result 247 states and 714 transitions. [2023-12-02 16:03:18,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 16:03:18,349 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-12-02 16:03:18,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:03:18,352 INFO L225 Difference]: With dead ends: 247 [2023-12-02 16:03:18,352 INFO L226 Difference]: Without dead ends: 227 [2023-12-02 16:03:18,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-12-02 16:03:18,354 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 34 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:03:18,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 3 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:03:18,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-12-02 16:03:18,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 160. [2023-12-02 16:03:18,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.9371069182389937) internal successors, (467), 159 states have internal predecessors, (467), 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) [2023-12-02 16:03:18,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 467 transitions. [2023-12-02 16:03:18,369 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 467 transitions. Word has length 36 [2023-12-02 16:03:18,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:03:18,369 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 467 transitions. [2023-12-02 16:03:18,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:03:18,369 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 467 transitions. [2023-12-02 16:03:18,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-02 16:03:18,371 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:03:18,371 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:03:18,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 16:03:18,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:03:18,577 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-12-02 16:03:18,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:03:18,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1782288298, now seen corresponding path program 3 times [2023-12-02 16:03:18,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:03:18,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855053879] [2023-12-02 16:03:18,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:18,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:03:18,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:03:18,820 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 16:03:18,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:03:18,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855053879] [2023-12-02 16:03:18,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855053879] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:03:18,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245645104] [2023-12-02 16:03:18,821 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 16:03:18,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:03:18,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:03:18,823 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:03:18,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 16:03:18,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 16:03:18,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:03:18,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 16:03:19,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:03:19,090 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 16:03:19,090 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:03:19,174 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 16:03:19,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245645104] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:03:19,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [180058312] [2023-12-02 16:03:19,175 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) [2023-12-02 16:03:19,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:03:19,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2023-12-02 16:03:19,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50985620] [2023-12-02 16:03:19,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:03:19,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 16:03:19,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:03:19,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 16:03:19,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-12-02 16:03:19,179 INFO L87 Difference]: Start difference. First operand 160 states and 467 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:03:19,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:03:19,322 INFO L93 Difference]: Finished difference Result 163 states and 470 transitions. [2023-12-02 16:03:19,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 16:03:19,323 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-12-02 16:03:19,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:03:19,325 INFO L225 Difference]: With dead ends: 163 [2023-12-02 16:03:19,325 INFO L226 Difference]: Without dead ends: 163 [2023-12-02 16:03:19,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-12-02 16:03:19,326 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:03:19,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 5 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:03:19,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2023-12-02 16:03:19,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2023-12-02 16:03:19,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.9012345679012346) internal successors, (470), 162 states have internal predecessors, (470), 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) [2023-12-02 16:03:19,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 470 transitions. [2023-12-02 16:03:19,337 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 470 transitions. Word has length 36 [2023-12-02 16:03:19,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:03:19,338 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 470 transitions. [2023-12-02 16:03:19,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:03:19,338 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 470 transitions. [2023-12-02 16:03:19,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 16:03:19,340 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:03:19,340 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:03:19,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 16:03:19,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:03:19,545 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-12-02 16:03:19,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:03:19,545 INFO L85 PathProgramCache]: Analyzing trace with hash -956227392, now seen corresponding path program 4 times [2023-12-02 16:03:19,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:03:19,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994012984] [2023-12-02 16:03:19,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:19,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:03:19,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:03:19,973 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 16:03:19,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:03:19,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994012984] [2023-12-02 16:03:19,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994012984] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:03:19,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:03:19,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:03:19,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616314776] [2023-12-02 16:03:19,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:03:19,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:03:19,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:03:19,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:03:19,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:03:19,977 INFO L87 Difference]: Start difference. First operand 163 states and 470 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:03:20,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:03:20,196 INFO L93 Difference]: Finished difference Result 260 states and 754 transitions. [2023-12-02 16:03:20,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:03:20,197 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-12-02 16:03:20,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:03:20,200 INFO L225 Difference]: With dead ends: 260 [2023-12-02 16:03:20,200 INFO L226 Difference]: Without dead ends: 234 [2023-12-02 16:03:20,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:03:20,201 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 37 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:03:20,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 4 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:03:20,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-12-02 16:03:20,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 177. [2023-12-02 16:03:20,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.9261363636363638) internal successors, (515), 176 states have internal predecessors, (515), 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) [2023-12-02 16:03:20,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 515 transitions. [2023-12-02 16:03:20,214 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 515 transitions. Word has length 39 [2023-12-02 16:03:20,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:03:20,215 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 515 transitions. [2023-12-02 16:03:20,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:03:20,215 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 515 transitions. [2023-12-02 16:03:20,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 16:03:20,217 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:03:20,217 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:03:20,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 16:03:20,218 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-12-02 16:03:20,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:03:20,218 INFO L85 PathProgramCache]: Analyzing trace with hash 78456828, now seen corresponding path program 5 times [2023-12-02 16:03:20,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:03:20,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546180820] [2023-12-02 16:03:20,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:20,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:03:20,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:03:20,573 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 16:03:20,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:03:20,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546180820] [2023-12-02 16:03:20,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546180820] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:03:20,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:03:20,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:03:20,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242848458] [2023-12-02 16:03:20,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:03:20,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:03:20,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:03:20,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:03:20,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:03:20,576 INFO L87 Difference]: Start difference. First operand 177 states and 515 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:03:20,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:03:20,753 INFO L93 Difference]: Finished difference Result 252 states and 740 transitions. [2023-12-02 16:03:20,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:03:20,754 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-12-02 16:03:20,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:03:20,757 INFO L225 Difference]: With dead ends: 252 [2023-12-02 16:03:20,757 INFO L226 Difference]: Without dead ends: 242 [2023-12-02 16:03:20,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:03:20,758 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 34 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:03:20,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 4 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:03:20,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2023-12-02 16:03:20,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 185. [2023-12-02 16:03:20,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.9456521739130435) internal successors, (542), 184 states have internal predecessors, (542), 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) [2023-12-02 16:03:20,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 542 transitions. [2023-12-02 16:03:20,769 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 542 transitions. Word has length 39 [2023-12-02 16:03:20,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:03:20,770 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 542 transitions. [2023-12-02 16:03:20,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:03:20,770 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 542 transitions. [2023-12-02 16:03:20,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 16:03:20,772 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:03:20,772 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:03:20,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 16:03:20,772 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-12-02 16:03:20,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:03:20,773 INFO L85 PathProgramCache]: Analyzing trace with hash -215630084, now seen corresponding path program 6 times [2023-12-02 16:03:20,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:03:20,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662922507] [2023-12-02 16:03:20,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:20,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:03:20,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:03:21,152 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 16:03:21,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:03:21,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662922507] [2023-12-02 16:03:21,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662922507] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:03:21,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:03:21,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:03:21,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254294399] [2023-12-02 16:03:21,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:03:21,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:03:21,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:03:21,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:03:21,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:03:21,155 INFO L87 Difference]: Start difference. First operand 185 states and 542 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:03:21,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:03:21,339 INFO L93 Difference]: Finished difference Result 258 states and 773 transitions. [2023-12-02 16:03:21,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:03:21,340 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-12-02 16:03:21,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:03:21,343 INFO L225 Difference]: With dead ends: 258 [2023-12-02 16:03:21,343 INFO L226 Difference]: Without dead ends: 258 [2023-12-02 16:03:21,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:03:21,344 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 29 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:03:21,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 4 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:03:21,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-12-02 16:03:21,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 201. [2023-12-02 16:03:21,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.98) internal successors, (596), 200 states have internal predecessors, (596), 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) [2023-12-02 16:03:21,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 596 transitions. [2023-12-02 16:03:21,353 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 596 transitions. Word has length 39 [2023-12-02 16:03:21,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:03:21,354 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 596 transitions. [2023-12-02 16:03:21,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:03:21,354 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 596 transitions. [2023-12-02 16:03:21,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 16:03:21,355 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:03:21,355 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:03:21,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 16:03:21,356 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-12-02 16:03:21,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:03:21,356 INFO L85 PathProgramCache]: Analyzing trace with hash -605803042, now seen corresponding path program 7 times [2023-12-02 16:03:21,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:03:21,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893426107] [2023-12-02 16:03:21,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:21,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:03:21,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:03:21,631 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 16:03:21,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:03:21,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893426107] [2023-12-02 16:03:21,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893426107] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:03:21,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:03:21,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:03:21,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478131659] [2023-12-02 16:03:21,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:03:21,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:03:21,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:03:21,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:03:21,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:03:21,634 INFO L87 Difference]: Start difference. First operand 201 states and 596 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:03:21,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:03:21,812 INFO L93 Difference]: Finished difference Result 219 states and 644 transitions. [2023-12-02 16:03:21,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:03:21,813 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-12-02 16:03:21,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:03:21,815 INFO L225 Difference]: With dead ends: 219 [2023-12-02 16:03:21,815 INFO L226 Difference]: Without dead ends: 209 [2023-12-02 16:03:21,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:03:21,816 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 29 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:03:21,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 4 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:03:21,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2023-12-02 16:03:21,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2023-12-02 16:03:21,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.9951923076923075) internal successors, (623), 208 states have internal predecessors, (623), 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) [2023-12-02 16:03:21,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 623 transitions. [2023-12-02 16:03:21,825 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 623 transitions. Word has length 39 [2023-12-02 16:03:21,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:03:21,826 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 623 transitions. [2023-12-02 16:03:21,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:03:21,826 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 623 transitions. [2023-12-02 16:03:21,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 16:03:21,827 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:03:21,827 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:03:21,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 16:03:21,827 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-12-02 16:03:21,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:03:21,828 INFO L85 PathProgramCache]: Analyzing trace with hash -899889954, now seen corresponding path program 8 times [2023-12-02 16:03:21,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:03:21,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331494637] [2023-12-02 16:03:21,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:21,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:03:21,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:03:22,090 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 16:03:22,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:03:22,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331494637] [2023-12-02 16:03:22,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331494637] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:03:22,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:03:22,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:03:22,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366011413] [2023-12-02 16:03:22,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:03:22,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:03:22,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:03:22,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:03:22,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:03:22,092 INFO L87 Difference]: Start difference. First operand 209 states and 623 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:03:22,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:03:22,243 INFO L93 Difference]: Finished difference Result 225 states and 677 transitions. [2023-12-02 16:03:22,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:03:22,244 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-12-02 16:03:22,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:03:22,246 INFO L225 Difference]: With dead ends: 225 [2023-12-02 16:03:22,246 INFO L226 Difference]: Without dead ends: 225 [2023-12-02 16:03:22,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:03:22,247 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 23 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:03:22,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 4 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:03:22,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-12-02 16:03:22,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 201. [2023-12-02 16:03:22,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.98) internal successors, (596), 200 states have internal predecessors, (596), 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) [2023-12-02 16:03:22,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 596 transitions. [2023-12-02 16:03:22,256 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 596 transitions. Word has length 39 [2023-12-02 16:03:22,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:03:22,257 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 596 transitions. [2023-12-02 16:03:22,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:03:22,257 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 596 transitions. [2023-12-02 16:03:22,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 16:03:22,258 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:03:22,258 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:03:22,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 16:03:22,259 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-12-02 16:03:22,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:03:22,259 INFO L85 PathProgramCache]: Analyzing trace with hash -887412450, now seen corresponding path program 9 times [2023-12-02 16:03:22,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:03:22,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69355023] [2023-12-02 16:03:22,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:22,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:03:22,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:03:22,478 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 16:03:22,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:03:22,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69355023] [2023-12-02 16:03:22,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69355023] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:03:22,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:03:22,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:03:22,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151757393] [2023-12-02 16:03:22,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:03:22,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:03:22,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:03:22,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:03:22,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:03:22,480 INFO L87 Difference]: Start difference. First operand 201 states and 596 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:03:22,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:03:22,630 INFO L93 Difference]: Finished difference Result 217 states and 650 transitions. [2023-12-02 16:03:22,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:03:22,630 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-12-02 16:03:22,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:03:22,632 INFO L225 Difference]: With dead ends: 217 [2023-12-02 16:03:22,632 INFO L226 Difference]: Without dead ends: 217 [2023-12-02 16:03:22,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:03:22,633 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 38 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:03:22,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 3 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:03:22,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2023-12-02 16:03:22,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 201. [2023-12-02 16:03:22,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.98) internal successors, (596), 200 states have internal predecessors, (596), 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) [2023-12-02 16:03:22,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 596 transitions. [2023-12-02 16:03:22,639 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 596 transitions. Word has length 39 [2023-12-02 16:03:22,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:03:22,640 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 596 transitions. [2023-12-02 16:03:22,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:03:22,640 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 596 transitions. [2023-12-02 16:03:22,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-02 16:03:22,641 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:03:22,641 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:03:22,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 16:03:22,641 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-12-02 16:03:22,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:03:22,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1590643882, now seen corresponding path program 1 times [2023-12-02 16:03:22,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:03:22,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549601903] [2023-12-02 16:03:22,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:22,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:03:22,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:03:22,830 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-12-02 16:03:22,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:03:22,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549601903] [2023-12-02 16:03:22,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549601903] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:03:22,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:03:22,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:03:22,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725784208] [2023-12-02 16:03:22,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:03:22,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:03:22,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:03:22,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:03:22,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:03:22,833 INFO L87 Difference]: Start difference. First operand 201 states and 596 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:03:22,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:03:22,968 INFO L93 Difference]: Finished difference Result 326 states and 993 transitions. [2023-12-02 16:03:22,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 16:03:22,969 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-12-02 16:03:22,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:03:22,973 INFO L225 Difference]: With dead ends: 326 [2023-12-02 16:03:22,973 INFO L226 Difference]: Without dead ends: 326 [2023-12-02 16:03:22,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:03:22,974 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 27 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:03:22,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 3 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:03:22,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2023-12-02 16:03:22,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 231. [2023-12-02 16:03:22,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 3.034782608695652) internal successors, (698), 230 states have internal predecessors, (698), 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) [2023-12-02 16:03:22,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 698 transitions. [2023-12-02 16:03:22,983 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 698 transitions. Word has length 40 [2023-12-02 16:03:22,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:03:22,984 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 698 transitions. [2023-12-02 16:03:22,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:03:22,984 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 698 transitions. [2023-12-02 16:03:22,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-02 16:03:22,985 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:03:22,986 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:03:22,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 16:03:22,986 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-12-02 16:03:22,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:03:22,986 INFO L85 PathProgramCache]: Analyzing trace with hash -459089490, now seen corresponding path program 2 times [2023-12-02 16:03:22,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:03:22,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521045661] [2023-12-02 16:03:22,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:22,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:03:23,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:03:23,217 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-12-02 16:03:23,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:03:23,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521045661] [2023-12-02 16:03:23,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521045661] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:03:23,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:03:23,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:03:23,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967593942] [2023-12-02 16:03:23,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:03:23,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:03:23,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:03:23,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:03:23,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:03:23,221 INFO L87 Difference]: Start difference. First operand 231 states and 698 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:03:23,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:03:23,343 INFO L93 Difference]: Finished difference Result 261 states and 800 transitions. [2023-12-02 16:03:23,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 16:03:23,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-12-02 16:03:23,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:03:23,346 INFO L225 Difference]: With dead ends: 261 [2023-12-02 16:03:23,346 INFO L226 Difference]: Without dead ends: 261 [2023-12-02 16:03:23,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:03:23,347 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 31 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:03:23,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 2 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:03:23,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2023-12-02 16:03:23,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 231. [2023-12-02 16:03:23,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 3.034782608695652) internal successors, (698), 230 states have internal predecessors, (698), 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) [2023-12-02 16:03:23,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 698 transitions. [2023-12-02 16:03:23,358 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 698 transitions. Word has length 40 [2023-12-02 16:03:23,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:03:23,359 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 698 transitions. [2023-12-02 16:03:23,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:03:23,359 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 698 transitions. [2023-12-02 16:03:23,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-02 16:03:23,360 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:03:23,361 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:03:23,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-02 16:03:23,361 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-12-02 16:03:23,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:03:23,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1014385437, now seen corresponding path program 1 times [2023-12-02 16:03:23,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:03:23,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016163187] [2023-12-02 16:03:23,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:23,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:03:23,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:03:26,184 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 16:03:26,184 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:03:26,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016163187] [2023-12-02 16:03:26,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016163187] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:03:26,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306352168] [2023-12-02 16:03:26,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:26,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:03:26,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:03:26,186 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:03:26,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 16:03:26,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:03:26,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 47 conjunts are in the unsatisfiable core [2023-12-02 16:03:26,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:03:27,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:03:27,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:03:27,232 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 16:03:27,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2023-12-02 16:03:27,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:03:27,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:03:27,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:03:27,667 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-12-02 16:03:27,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 34 [2023-12-02 16:03:27,899 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:03:27,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-12-02 16:03:27,972 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 16:03:27,972 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:03:28,867 INFO L349 Elim1Store]: treesize reduction 19, result has 84.3 percent of original size [2023-12-02 16:03:28,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 372 treesize of output 409 [2023-12-02 16:03:28,967 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:03:28,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 327 treesize of output 327 [2023-12-02 16:03:29,017 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:03:29,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 238 [2023-12-02 16:03:40,522 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 16:03:40,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306352168] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:03:40,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [604341222] [2023-12-02 16:03:40,523 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) [2023-12-02 16:03:40,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:03:40,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 14] total 43 [2023-12-02 16:03:40,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160317993] [2023-12-02 16:03:40,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:03:40,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-12-02 16:03:40,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:03:40,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-12-02 16:03:40,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1729, Unknown=5, NotChecked=0, Total=1892 [2023-12-02 16:03:40,526 INFO L87 Difference]: Start difference. First operand 231 states and 698 transitions. Second operand has 44 states, 44 states have (on average 1.8409090909090908) internal successors, (81), 43 states have internal predecessors, (81), 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) [2023-12-02 16:03:44,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:03:44,638 INFO L93 Difference]: Finished difference Result 626 states and 1936 transitions. [2023-12-02 16:03:44,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 16:03:44,638 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.8409090909090908) internal successors, (81), 43 states have internal predecessors, (81), 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 41 [2023-12-02 16:03:44,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:03:44,644 INFO L225 Difference]: With dead ends: 626 [2023-12-02 16:03:44,644 INFO L226 Difference]: Without dead ends: 605 [2023-12-02 16:03:44,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=535, Invalid=3366, Unknown=5, NotChecked=0, Total=3906 [2023-12-02 16:03:44,646 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 342 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 2635 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 2711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:03:44,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 31 Invalid, 2711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2635 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-02 16:03:44,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2023-12-02 16:03:44,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 329. [2023-12-02 16:03:44,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 3.158536585365854) internal successors, (1036), 328 states have internal predecessors, (1036), 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) [2023-12-02 16:03:44,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 1036 transitions. [2023-12-02 16:03:44,678 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 1036 transitions. Word has length 41 [2023-12-02 16:03:44,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:03:44,678 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 1036 transitions. [2023-12-02 16:03:44,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.8409090909090908) internal successors, (81), 43 states have internal predecessors, (81), 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) [2023-12-02 16:03:44,679 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 1036 transitions. [2023-12-02 16:03:44,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-02 16:03:44,680 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:03:44,680 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:03:44,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 16:03:44,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 16:03:44,887 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-12-02 16:03:44,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:03:44,888 INFO L85 PathProgramCache]: Analyzing trace with hash -885759675, now seen corresponding path program 2 times [2023-12-02 16:03:44,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:03:44,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270268546] [2023-12-02 16:03:44,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:03:44,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:03:44,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:03:47,768 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-02 16:03:47,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:03:47,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270268546] [2023-12-02 16:03:47,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270268546] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:03:47,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109047574] [2023-12-02 16:03:47,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 16:03:47,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:03:47,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:03:47,769 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:03:47,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 16:03:47,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 16:03:47,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:03:47,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-02 16:03:47,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:03:48,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:03:48,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:03:48,552 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 16:03:48,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 26 [2023-12-02 16:03:48,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:03:48,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:03:48,715 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 16:03:48,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 26 [2023-12-02 16:03:49,070 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:03:49,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 75 [2023-12-02 16:03:49,211 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 16:03:49,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:03:50,030 INFO L349 Elim1Store]: treesize reduction 19, result has 84.3 percent of original size [2023-12-02 16:03:50,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 2432 treesize of output 2261 [2023-12-02 16:03:50,123 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:03:50,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 523 treesize of output 515 [2023-12-02 16:03:50,175 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:03:50,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 491 treesize of output 451 [2023-12-02 16:04:50,821 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 16:04:50,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109047574] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:04:50,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [845837428] [2023-12-02 16:04:50,823 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$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 16:04:50,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:04:50,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16, 13] total 48 [2023-12-02 16:04:50,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161515672] [2023-12-02 16:04:50,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:04:50,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-02 16:04:50,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:04:50,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-02 16:04:50,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=2147, Unknown=14, NotChecked=0, Total=2352 [2023-12-02 16:04:50,827 INFO L87 Difference]: Start difference. First operand 329 states and 1036 transitions. Second operand has 49 states, 49 states have (on average 1.836734693877551) internal successors, (90), 48 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:04:53,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 16:04:57,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:04:57,155 INFO L93 Difference]: Finished difference Result 594 states and 1861 transitions. [2023-12-02 16:04:57,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-02 16:04:57,156 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.836734693877551) internal successors, (90), 48 states have internal predecessors, (90), 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 41 [2023-12-02 16:04:57,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:04:57,161 INFO L225 Difference]: With dead ends: 594 [2023-12-02 16:04:57,161 INFO L226 Difference]: Without dead ends: 580 [2023-12-02 16:04:57,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=665, Invalid=4291, Unknown=14, NotChecked=0, Total=4970 [2023-12-02 16:04:57,164 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 312 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 2502 mSolverCounterSat, 76 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 2583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2502 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:04:57,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 25 Invalid, 2583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2502 Invalid, 5 Unknown, 0 Unchecked, 4.1s Time] [2023-12-02 16:04:57,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2023-12-02 16:04:57,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 343. [2023-12-02 16:04:57,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 3.1842105263157894) internal successors, (1089), 342 states have internal predecessors, (1089), 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) [2023-12-02 16:04:57,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1089 transitions. [2023-12-02 16:04:57,175 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1089 transitions. Word has length 41 [2023-12-02 16:04:57,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:04:57,175 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 1089 transitions. [2023-12-02 16:04:57,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.836734693877551) internal successors, (90), 48 states have internal predecessors, (90), 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) [2023-12-02 16:04:57,176 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1089 transitions. [2023-12-02 16:04:57,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-02 16:04:57,177 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:04:57,177 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:04:57,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 16:04:57,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 16:04:57,378 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-12-02 16:04:57,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:04:57,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1381010043, now seen corresponding path program 3 times [2023-12-02 16:04:57,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:04:57,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190137909] [2023-12-02 16:04:57,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:04:57,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:04:57,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:04:58,881 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 16:04:58,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:04:58,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190137909] [2023-12-02 16:04:58,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190137909] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:04:58,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191121595] [2023-12-02 16:04:58,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 16:04:58,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:04:58,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:04:58,883 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:04:58,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 16:04:59,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 16:04:59,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:04:59,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-02 16:04:59,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:04:59,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:04:59,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:04:59,689 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 16:04:59,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2023-12-02 16:04:59,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:04:59,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:04:59,812 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 16:04:59,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2023-12-02 16:04:59,920 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:04:59,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-12-02 16:04:59,952 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 16:04:59,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:05:00,600 INFO L349 Elim1Store]: treesize reduction 19, result has 84.3 percent of original size [2023-12-02 16:05:00,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 608 treesize of output 629 [2023-12-02 16:05:00,668 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:05:00,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 523 treesize of output 483 [2023-12-02 16:05:00,710 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:05:00,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 459 treesize of output 451 [2023-12-02 16:06:13,547 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 16:06:13,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191121595] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:06:13,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [170145482] [2023-12-02 16:06:13,549 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) [2023-12-02 16:06:13,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:06:13,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 13] total 37 [2023-12-02 16:06:13,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868633239] [2023-12-02 16:06:13,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:06:13,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-02 16:06:13,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:06:13,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-02 16:06:13,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1245, Unknown=14, NotChecked=0, Total=1406 [2023-12-02 16:06:13,552 INFO L87 Difference]: Start difference. First operand 343 states and 1089 transitions. Second operand has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 37 states have internal predecessors, (74), 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) [2023-12-02 16:06:16,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:06:16,188 INFO L93 Difference]: Finished difference Result 625 states and 1980 transitions. [2023-12-02 16:06:16,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 16:06:16,188 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 37 states have internal predecessors, (74), 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 41 [2023-12-02 16:06:16,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:06:16,192 INFO L225 Difference]: With dead ends: 625 [2023-12-02 16:06:16,192 INFO L226 Difference]: Without dead ends: 618 [2023-12-02 16:06:16,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=396, Invalid=2346, Unknown=14, NotChecked=0, Total=2756 [2023-12-02 16:06:16,194 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 273 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1898 mSolverCounterSat, 58 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 1968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1898 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-02 16:06:16,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 22 Invalid, 1968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1898 Invalid, 12 Unknown, 0 Unchecked, 1.6s Time] [2023-12-02 16:06:16,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2023-12-02 16:06:16,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 355. [2023-12-02 16:06:16,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.189265536723164) internal successors, (1129), 354 states have internal predecessors, (1129), 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) [2023-12-02 16:06:16,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1129 transitions. [2023-12-02 16:06:16,210 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1129 transitions. Word has length 41 [2023-12-02 16:06:16,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:06:16,211 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 1129 transitions. [2023-12-02 16:06:16,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 37 states have internal predecessors, (74), 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) [2023-12-02 16:06:16,211 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1129 transitions. [2023-12-02 16:06:16,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-02 16:06:16,213 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:06:16,213 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:06:16,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 16:06:16,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 16:06:16,414 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-12-02 16:06:16,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:06:16,414 INFO L85 PathProgramCache]: Analyzing trace with hash 874068029, now seen corresponding path program 4 times [2023-12-02 16:06:16,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:06:16,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280631459] [2023-12-02 16:06:16,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:06:16,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:06:16,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:06:18,261 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 16:06:18,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:06:18,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280631459] [2023-12-02 16:06:18,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280631459] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:06:18,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645554805] [2023-12-02 16:06:18,261 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 16:06:18,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:06:18,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:06:18,262 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:06:18,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 16:06:18,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:06:18,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 53 conjunts are in the unsatisfiable core [2023-12-02 16:06:18,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:06:18,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:06:18,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:06:18,486 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-12-02 16:06:18,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 12 treesize of output 16 [2023-12-02 16:06:18,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:06:18,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:06:18,507 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2023-12-02 16:06:18,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 12 treesize of output 1 [2023-12-02 16:06:18,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:06:18,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:06:18,531 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2023-12-02 16:06:18,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 1 [2023-12-02 16:06:18,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:06:18,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:06:18,546 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2023-12-02 16:06:18,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 12 treesize of output 1 [2023-12-02 16:06:18,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:06:18,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:06:18,680 INFO L349 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2023-12-02 16:06:18,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 25 [2023-12-02 16:06:19,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:06:19,743 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 16:06:19,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2023-12-02 16:06:19,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:06:19,901 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 16:06:19,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2023-12-02 16:06:20,088 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:06:20,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-12-02 16:06:20,121 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 16:06:20,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:06:20,903 INFO L349 Elim1Store]: treesize reduction 19, result has 84.3 percent of original size [2023-12-02 16:06:20,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1216 treesize of output 1173 [2023-12-02 16:06:20,975 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:06:20,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 523 treesize of output 515 [2023-12-02 16:06:21,028 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:06:21,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 491 treesize of output 451 [2023-12-02 16:07:07,144 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 16:07:07,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645554805] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:07:07,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1352920611] [2023-12-02 16:07:07,145 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) [2023-12-02 16:07:07,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:07:07,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 13] total 37 [2023-12-02 16:07:07,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509378184] [2023-12-02 16:07:07,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:07:07,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-02 16:07:07,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:07:07,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-02 16:07:07,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1256, Unknown=9, NotChecked=0, Total=1406 [2023-12-02 16:07:07,148 INFO L87 Difference]: Start difference. First operand 355 states and 1129 transitions. Second operand has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:07:10,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:07:10,436 INFO L93 Difference]: Finished difference Result 622 states and 1949 transitions. [2023-12-02 16:07:10,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 16:07:10,437 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-12-02 16:07:10,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:07:10,440 INFO L225 Difference]: With dead ends: 622 [2023-12-02 16:07:10,441 INFO L226 Difference]: Without dead ends: 608 [2023-12-02 16:07:10,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=429, Invalid=2532, Unknown=9, NotChecked=0, Total=2970 [2023-12-02 16:07:10,442 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 259 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 1567 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 1619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-02 16:07:10,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 20 Invalid, 1619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1567 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-02 16:07:10,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2023-12-02 16:07:10,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 367. [2023-12-02 16:07:10,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 3.1939890710382515) internal successors, (1169), 366 states have internal predecessors, (1169), 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) [2023-12-02 16:07:10,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 1169 transitions. [2023-12-02 16:07:10,454 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 1169 transitions. Word has length 41 [2023-12-02 16:07:10,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:07:10,455 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 1169 transitions. [2023-12-02 16:07:10,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:07:10,455 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 1169 transitions. [2023-12-02 16:07:10,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-02 16:07:10,456 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:07:10,456 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:07:10,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 16:07:10,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 16:07:10,657 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-12-02 16:07:10,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:07:10,657 INFO L85 PathProgramCache]: Analyzing trace with hash 378817661, now seen corresponding path program 5 times [2023-12-02 16:07:10,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:07:10,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247016126] [2023-12-02 16:07:10,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:07:10,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:07:10,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:07:11,950 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 16:07:11,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:07:11,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247016126] [2023-12-02 16:07:11,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247016126] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:07:11,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148300326] [2023-12-02 16:07:11,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 16:07:11,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:07:11,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:07:11,952 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:07:11,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 16:07:12,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 16:07:12,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:07:12,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-02 16:07:12,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:07:12,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:07:12,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:07:12,750 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 16:07:12,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2023-12-02 16:07:12,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:07:12,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:07:12,815 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 16:07:12,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2023-12-02 16:07:13,009 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:07:13,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-12-02 16:07:13,110 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 16:07:13,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:07:13,937 INFO L349 Elim1Store]: treesize reduction 19, result has 84.3 percent of original size [2023-12-02 16:07:13,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1792 treesize of output 1685 [2023-12-02 16:07:14,028 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:07:14,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 523 treesize of output 483 [2023-12-02 16:07:14,076 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:07:14,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 459 treesize of output 451 [2023-12-02 16:08:07,761 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 16:08:07,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148300326] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:08:07,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1600180541] [2023-12-02 16:08:07,762 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) [2023-12-02 16:08:07,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:08:07,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 13] total 41 [2023-12-02 16:08:07,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586589598] [2023-12-02 16:08:07,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:08:07,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-12-02 16:08:07,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:08:07,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-12-02 16:08:07,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1527, Unknown=8, NotChecked=0, Total=1722 [2023-12-02 16:08:07,766 INFO L87 Difference]: Start difference. First operand 367 states and 1169 transitions. Second operand has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 41 states have internal predecessors, (85), 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) [2023-12-02 16:08:10,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:08:10,347 INFO L93 Difference]: Finished difference Result 653 states and 2068 transitions. [2023-12-02 16:08:10,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 16:08:10,347 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 41 states have internal predecessors, (85), 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 41 [2023-12-02 16:08:10,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:08:10,353 INFO L225 Difference]: With dead ends: 653 [2023-12-02 16:08:10,353 INFO L226 Difference]: Without dead ends: 646 [2023-12-02 16:08:10,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=454, Invalid=2730, Unknown=8, NotChecked=0, Total=3192 [2023-12-02 16:08:10,355 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 380 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 1623 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 1698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-02 16:08:10,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 20 Invalid, 1698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1623 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-02 16:08:10,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2023-12-02 16:08:10,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 361. [2023-12-02 16:08:10,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 3.191666666666667) internal successors, (1149), 360 states have internal predecessors, (1149), 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) [2023-12-02 16:08:10,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1149 transitions. [2023-12-02 16:08:10,372 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1149 transitions. Word has length 41 [2023-12-02 16:08:10,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:08:10,372 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 1149 transitions. [2023-12-02 16:08:10,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 41 states have internal predecessors, (85), 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) [2023-12-02 16:08:10,372 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1149 transitions. [2023-12-02 16:08:10,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-02 16:08:10,374 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:08:10,374 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:08:10,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-02 16:08:10,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 16:08:10,577 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-12-02 16:08:10,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:08:10,577 INFO L85 PathProgramCache]: Analyzing trace with hash -58733827, now seen corresponding path program 6 times [2023-12-02 16:08:10,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:08:10,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993956706] [2023-12-02 16:08:10,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:08:10,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:08:10,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:08:11,679 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 16:08:11,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:08:11,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993956706] [2023-12-02 16:08:11,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993956706] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:08:11,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716198465] [2023-12-02 16:08:11,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 16:08:11,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:08:11,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:08:11,680 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:08:11,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 16:08:11,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 16:08:11,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:08:11,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-02 16:08:11,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:08:12,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:08:12,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:08:12,428 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 16:08:12,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2023-12-02 16:08:12,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:08:12,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:08:12,501 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 16:08:12,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2023-12-02 16:08:12,673 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:08:12,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-12-02 16:08:12,709 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 16:08:12,709 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:08:13,381 INFO L349 Elim1Store]: treesize reduction 19, result has 84.3 percent of original size [2023-12-02 16:08:13,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1216 treesize of output 1173 [2023-12-02 16:08:13,483 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:08:13,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 523 treesize of output 483 [2023-12-02 16:08:13,533 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:08:13,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 459 treesize of output 451 [2023-12-02 16:09:15,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2023-12-02 16:09:15,290 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2023-12-02 16:09:15,291 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2023-12-02 16:09:15,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [11128599] [2023-12-02 16:09:15,292 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) [2023-12-02 16:09:15,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:09:15,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-12-02 16:09:15,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433104226] [2023-12-02 16:09:15,292 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 16:09:15,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 16:09:15,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:09:15,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 16:09:15,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=985, Unknown=8, NotChecked=0, Total=1122 [2023-12-02 16:09:15,294 INFO L87 Difference]: Start difference. First operand 361 states and 1149 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 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) [2023-12-02 16:09:15,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=129, Invalid=985, Unknown=8, NotChecked=0, Total=1122 [2023-12-02 16:09:15,295 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:09:15,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 16:09:15,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 16:09:15,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:09:15,498 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:177) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertCodeBlock(IncrementalHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:278) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:284) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.releaseLock(ChainingHoareTripleChecker.java:449) at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1655) at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:658) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.releaseLock(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:159) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:365) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:325) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) 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$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:175) ... 36 more [2023-12-02 16:09:15,506 INFO L158 Benchmark]: Toolchain (without parser) took 361043.18ms. Allocated memory was 163.6MB in the beginning and 536.9MB in the end (delta: 373.3MB). Free memory was 120.9MB in the beginning and 420.9MB in the end (delta: -300.0MB). Peak memory consumption was 76.6MB. Max. memory is 16.1GB. [2023-12-02 16:09:15,507 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 163.6MB. Free memory was 136.4MB in the beginning and 136.3MB in the end (delta: 160.8kB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 16:09:15,508 INFO L158 Benchmark]: CACSL2BoogieTranslator took 268.34ms. Allocated memory is still 163.6MB. Free memory was 120.9MB in the beginning and 108.9MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-12-02 16:09:15,509 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.60ms. Allocated memory is still 163.6MB. Free memory was 108.3MB in the beginning and 105.6MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 16:09:15,511 INFO L158 Benchmark]: Boogie Preprocessor took 44.81ms. Allocated memory is still 163.6MB. Free memory was 105.6MB in the beginning and 103.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 16:09:15,512 INFO L158 Benchmark]: RCFGBuilder took 1004.57ms. Allocated memory was 163.6MB in the beginning and 209.7MB in the end (delta: 46.1MB). Free memory was 103.5MB in the beginning and 137.3MB in the end (delta: -33.8MB). Peak memory consumption was 65.5MB. Max. memory is 16.1GB. [2023-12-02 16:09:15,514 INFO L158 Benchmark]: TraceAbstraction took 359669.92ms. Allocated memory was 209.7MB in the beginning and 536.9MB in the end (delta: 327.2MB). Free memory was 136.3MB in the beginning and 420.9MB in the end (delta: -284.6MB). Peak memory consumption was 44.6MB. Max. memory is 16.1GB. [2023-12-02 16:09:15,521 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 163.6MB. Free memory was 136.4MB in the beginning and 136.3MB in the end (delta: 160.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 268.34ms. Allocated memory is still 163.6MB. Free memory was 120.9MB in the beginning and 108.9MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.60ms. Allocated memory is still 163.6MB. Free memory was 108.3MB in the beginning and 105.6MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 44.81ms. Allocated memory is still 163.6MB. Free memory was 105.6MB in the beginning and 103.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1004.57ms. Allocated memory was 163.6MB in the beginning and 209.7MB in the end (delta: 46.1MB). Free memory was 103.5MB in the beginning and 137.3MB in the end (delta: -33.8MB). Peak memory consumption was 65.5MB. Max. memory is 16.1GB. * TraceAbstraction took 359669.92ms. Allocated memory was 209.7MB in the beginning and 536.9MB in the end (delta: 327.2MB). Free memory was 136.3MB in the beginning and 420.9MB in the end (delta: -284.6MB). Peak memory consumption was 44.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh --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 f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 16:09:17,243 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 16:09:17,318 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2023-12-02 16:09:17,324 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 16:09:17,325 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 16:09:17,353 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 16:09:17,353 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 16:09:17,354 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 16:09:17,355 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 16:09:17,356 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 16:09:17,356 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 16:09:17,357 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 16:09:17,357 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 16:09:17,358 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 16:09:17,359 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 16:09:17,359 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 16:09:17,360 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 16:09:17,361 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 16:09:17,361 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 16:09:17,362 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 16:09:17,362 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 16:09:17,363 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 16:09:17,363 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 16:09:17,364 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 16:09:17,364 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 16:09:17,365 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-02 16:09:17,365 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-02 16:09:17,366 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 16:09:17,366 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 16:09:17,367 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 16:09:17,367 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 16:09:17,367 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-02 16:09:17,368 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 16:09:17,368 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 16:09:17,368 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:09:17,369 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 16:09:17,369 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 16:09:17,369 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 16:09:17,370 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-12-02 16:09:17,370 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-02 16:09:17,370 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 16:09:17,370 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 16:09:17,371 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 16:09:17,371 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 16:09:17,371 INFO L153 SettingsManager]: * Logic for external solver=AUFBV 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_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 [2023-12-02 16:09:17,695 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 16:09:17,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 16:09:17,723 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 16:09:17,724 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 16:09:17,725 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 16:09:17,726 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2023-12-02 16:09:20,623 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 16:09:20,826 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 16:09:20,827 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2023-12-02 16:09:20,836 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/data/32e8b7e86/41ea7e5a31ee40eda9c04b8730152ac8/FLAG0b36cb4af [2023-12-02 16:09:20,850 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/data/32e8b7e86/41ea7e5a31ee40eda9c04b8730152ac8 [2023-12-02 16:09:20,852 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 16:09:20,853 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 16:09:20,855 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 16:09:20,855 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 16:09:20,860 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 16:09:20,860 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:09:20" (1/1) ... [2023-12-02 16:09:20,862 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34862de7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:09:20, skipping insertion in model container [2023-12-02 16:09:20,862 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:09:20" (1/1) ... [2023-12-02 16:09:20,888 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 16:09:21,069 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_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c[3073,3086] [2023-12-02 16:09:21,083 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:09:21,096 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-12-02 16:09:21,102 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 16:09:21,118 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_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c[3073,3086] [2023-12-02 16:09:21,123 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:09:21,127 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 16:09:21,151 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_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c[3073,3086] [2023-12-02 16:09:21,156 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:09:21,173 INFO L206 MainTranslator]: Completed translation [2023-12-02 16:09:21,173 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:09:21 WrapperNode [2023-12-02 16:09:21,174 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 16:09:21,175 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 16:09:21,175 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 16:09:21,175 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 16:09:21,182 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:09:21" (1/1) ... [2023-12-02 16:09:21,193 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:09:21" (1/1) ... [2023-12-02 16:09:21,224 INFO L138 Inliner]: procedures = 28, calls = 46, calls flagged for inlining = 16, calls inlined = 24, statements flattened = 276 [2023-12-02 16:09:21,225 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 16:09:21,225 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 16:09:21,225 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 16:09:21,226 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 16:09:21,234 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:09:21" (1/1) ... [2023-12-02 16:09:21,235 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:09:21" (1/1) ... [2023-12-02 16:09:21,249 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:09:21" (1/1) ... [2023-12-02 16:09:21,249 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:09:21" (1/1) ... [2023-12-02 16:09:21,263 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:09:21" (1/1) ... [2023-12-02 16:09:21,292 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:09:21" (1/1) ... [2023-12-02 16:09:21,304 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:09:21" (1/1) ... [2023-12-02 16:09:21,306 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:09:21" (1/1) ... [2023-12-02 16:09:21,312 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 16:09:21,313 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 16:09:21,313 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 16:09:21,313 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 16:09:21,314 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:09:21" (1/1) ... [2023-12-02 16:09:21,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:09:21,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:09:21,340 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 16:09:21,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 16:09:21,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 16:09:21,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-12-02 16:09:21,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 16:09:21,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-12-02 16:09:21,393 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-12-02 16:09:21,393 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-12-02 16:09:21,393 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-12-02 16:09:21,394 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-12-02 16:09:21,394 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-12-02 16:09:21,394 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-12-02 16:09:21,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 16:09:21,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 16:09:21,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 16:09:21,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 16:09:21,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-12-02 16:09:21,397 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-12-02 16:09:21,528 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 16:09:21,531 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 16:09:22,058 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 16:09:22,548 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 16:09:22,549 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-12-02 16:09:22,549 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:09:22 BoogieIcfgContainer [2023-12-02 16:09:22,550 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 16:09:22,552 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 16:09:22,553 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 16:09:22,556 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 16:09:22,556 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:09:20" (1/3) ... [2023-12-02 16:09:22,557 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fb3ee71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:09:22, skipping insertion in model container [2023-12-02 16:09:22,557 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:09:21" (2/3) ... [2023-12-02 16:09:22,558 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fb3ee71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:09:22, skipping insertion in model container [2023-12-02 16:09:22,558 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:09:22" (3/3) ... [2023-12-02 16:09:22,559 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-trans.wvr.c [2023-12-02 16:09:22,569 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-12-02 16:09:22,593 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 16:09:22,593 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 16:09:22,593 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-02 16:09:22,660 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-12-02 16:09:22,690 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 37 places, 33 transitions, 87 flow [2023-12-02 16:09:22,718 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 110 states, 109 states have (on average 3.0458715596330275) internal successors, (332), 109 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:09:22,737 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 16:09:22,744 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;@5d75f93d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 16:09:22,745 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-12-02 16:09:22,748 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 109 states have (on average 3.0458715596330275) internal successors, (332), 109 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:09:22,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 16:09:22,758 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:09:22,758 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:09:22,759 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-12-02 16:09:22,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:09:22,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1348092006, now seen corresponding path program 1 times [2023-12-02 16:09:22,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:09:22,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1733524253] [2023-12-02 16:09:22,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:09:22,776 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:09:22,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:09:22,779 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:09:22,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-12-02 16:09:22,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:09:22,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 16:09:22,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:09:23,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:09:23,012 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:09:23,012 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:09:23,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1733524253] [2023-12-02 16:09:23,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1733524253] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:09:23,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:09:23,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 16:09:23,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915892359] [2023-12-02 16:09:23,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:09:23,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:09:23,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:09:23,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:09:23,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:09:23,043 INFO L87 Difference]: Start difference. First operand has 110 states, 109 states have (on average 3.0458715596330275) internal successors, (332), 109 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 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) [2023-12-02 16:09:23,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:09:23,244 INFO L93 Difference]: Finished difference Result 113 states and 335 transitions. [2023-12-02 16:09:23,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:09:23,247 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 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 23 [2023-12-02 16:09:23,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:09:23,258 INFO L225 Difference]: With dead ends: 113 [2023-12-02 16:09:23,258 INFO L226 Difference]: Without dead ends: 113 [2023-12-02 16:09:23,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:09:23,264 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:09:23,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:09:23,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-12-02 16:09:23,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2023-12-02 16:09:23,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.9910714285714284) internal successors, (335), 112 states have internal predecessors, (335), 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) [2023-12-02 16:09:23,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 335 transitions. [2023-12-02 16:09:23,313 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 335 transitions. Word has length 23 [2023-12-02 16:09:23,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:09:23,313 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 335 transitions. [2023-12-02 16:09:23,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 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) [2023-12-02 16:09:23,314 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 335 transitions. [2023-12-02 16:09:23,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 16:09:23,316 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:09:23,316 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:09:23,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-12-02 16:09:23,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:09:23,517 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-12-02 16:09:23,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:09:23,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1501150512, now seen corresponding path program 1 times [2023-12-02 16:09:23,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:09:23,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [199022282] [2023-12-02 16:09:23,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:09:23,519 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:09:23,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:09:23,520 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:09:23,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-12-02 16:09:23,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:09:23,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 16:09:23,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:09:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 16:09:23,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:09:23,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 16:09:23,762 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:09:23,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [199022282] [2023-12-02 16:09:23,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [199022282] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:09:23,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [667893845] [2023-12-02 16:09:23,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:09:23,763 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 16:09:23,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 16:09:23,785 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 16:09:23,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2023-12-02 16:09:24,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:09:24,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 16:09:24,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:09:24,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 16:09:24,130 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:09:24,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 16:09:24,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [667893845] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:09:24,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576671195] [2023-12-02 16:09:24,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:09:24,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:09:24,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:09:24,150 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:09:24,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 16:09:24,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:09:24,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 16:09:24,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:09:24,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 16:09:24,344 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:09:24,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576671195] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:09:24,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2023-12-02 16:09:24,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3, 3] total 8 [2023-12-02 16:09:24,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797227145] [2023-12-02 16:09:24,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:09:24,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:09:24,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:09:24,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:09:24,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:09:24,349 INFO L87 Difference]: Start difference. First operand 113 states and 335 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:09:24,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:09:24,736 INFO L93 Difference]: Finished difference Result 192 states and 560 transitions. [2023-12-02 16:09:24,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 16:09:24,737 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-02 16:09:24,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:09:24,741 INFO L225 Difference]: With dead ends: 192 [2023-12-02 16:09:24,741 INFO L226 Difference]: Without dead ends: 176 [2023-12-02 16:09:24,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-12-02 16:09:24,743 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 34 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:09:24,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 3 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 16:09:24,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2023-12-02 16:09:24,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 123. [2023-12-02 16:09:24,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 3.0) internal successors, (366), 122 states have internal predecessors, (366), 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) [2023-12-02 16:09:24,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 366 transitions. [2023-12-02 16:09:24,762 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 366 transitions. Word has length 26 [2023-12-02 16:09:24,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:09:24,763 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 366 transitions. [2023-12-02 16:09:24,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:09:24,763 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 366 transitions. [2023-12-02 16:09:24,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 16:09:24,766 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:09:24,766 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:09:24,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2023-12-02 16:09:24,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 16:09:25,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-12-02 16:09:25,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:09:25,370 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-12-02 16:09:25,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:09:25,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1840487348, now seen corresponding path program 2 times [2023-12-02 16:09:25,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:09:25,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [897999157] [2023-12-02 16:09:25,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 16:09:25,371 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:09:25,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:09:25,372 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:09:25,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-12-02 16:09:25,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-02 16:09:25,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:09:25,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 16:09:25,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:09:25,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 16:09:25,556 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:09:25,556 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:09:25,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [897999157] [2023-12-02 16:09:25,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [897999157] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:09:25,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:09:25,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:09:25,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882475874] [2023-12-02 16:09:25,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:09:25,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:09:25,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:09:25,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:09:25,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:09:25,559 INFO L87 Difference]: Start difference. First operand 123 states and 366 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:09:25,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:09:25,917 INFO L93 Difference]: Finished difference Result 192 states and 579 transitions. [2023-12-02 16:09:25,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 16:09:25,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-02 16:09:25,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:09:25,920 INFO L225 Difference]: With dead ends: 192 [2023-12-02 16:09:25,920 INFO L226 Difference]: Without dead ends: 192 [2023-12-02 16:09:25,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:09:25,922 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 27 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:09:25,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 3 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 16:09:25,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-12-02 16:09:25,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 139. [2023-12-02 16:09:25,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 3.0434782608695654) internal successors, (420), 138 states have internal predecessors, (420), 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) [2023-12-02 16:09:25,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 420 transitions. [2023-12-02 16:09:25,939 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 420 transitions. Word has length 26 [2023-12-02 16:09:25,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:09:25,940 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 420 transitions. [2023-12-02 16:09:25,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:09:25,940 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 420 transitions. [2023-12-02 16:09:25,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 16:09:25,942 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:09:25,943 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:09:25,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-12-02 16:09:26,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:09:26,146 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-12-02 16:09:26,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:09:26,146 INFO L85 PathProgramCache]: Analyzing trace with hash -189308404, now seen corresponding path program 3 times [2023-12-02 16:09:26,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:09:26,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1784242195] [2023-12-02 16:09:26,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 16:09:26,147 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:09:26,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:09:26,148 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:09:26,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-12-02 16:09:26,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-12-02 16:09:26,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:09:26,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 16:09:26,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:09:26,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 16:09:26,284 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:09:26,284 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:09:26,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1784242195] [2023-12-02 16:09:26,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1784242195] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:09:26,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:09:26,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:09:26,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698366358] [2023-12-02 16:09:26,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:09:26,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:09:26,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:09:26,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:09:26,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:09:26,286 INFO L87 Difference]: Start difference. First operand 139 states and 420 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:09:26,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:09:26,539 INFO L93 Difference]: Finished difference Result 155 states and 474 transitions. [2023-12-02 16:09:26,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 16:09:26,540 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-02 16:09:26,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:09:26,542 INFO L225 Difference]: With dead ends: 155 [2023-12-02 16:09:26,542 INFO L226 Difference]: Without dead ends: 155 [2023-12-02 16:09:26,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:09:26,544 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 31 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:09:26,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 2 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:09:26,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-12-02 16:09:26,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 139. [2023-12-02 16:09:26,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 3.0434782608695654) internal successors, (420), 138 states have internal predecessors, (420), 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) [2023-12-02 16:09:26,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 420 transitions. [2023-12-02 16:09:26,558 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 420 transitions. Word has length 26 [2023-12-02 16:09:26,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:09:26,558 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 420 transitions. [2023-12-02 16:09:26,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:09:26,558 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 420 transitions. [2023-12-02 16:09:26,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 16:09:26,560 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:09:26,560 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:09:26,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-12-02 16:09:26,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:09:26,761 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-12-02 16:09:26,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:09:26,761 INFO L85 PathProgramCache]: Analyzing trace with hash 124528313, now seen corresponding path program 1 times [2023-12-02 16:09:26,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:09:26,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [60822351] [2023-12-02 16:09:26,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:09:26,762 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:09:26,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:09:26,764 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:09:26,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-12-02 16:09:26,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:09:26,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 16:09:26,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:09:26,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 16:09:26,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:09:27,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 16:09:27,011 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:09:27,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [60822351] [2023-12-02 16:09:27,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [60822351] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:09:27,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [464675872] [2023-12-02 16:09:27,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:09:27,012 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 16:09:27,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 16:09:27,013 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 16:09:27,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2023-12-02 16:09:27,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:09:27,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 16:09:27,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:09:27,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 16:09:27,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:09:27,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 16:09:27,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [464675872] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:09:27,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847748220] [2023-12-02 16:09:27,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:09:27,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:09:27,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:09:27,297 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:09:27,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 16:09:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:09:27,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 16:09:27,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:09:27,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 16:09:27,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:09:27,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 16:09:27,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847748220] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:09:27,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 16:09:27,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 5 [2023-12-02 16:09:27,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291893008] [2023-12-02 16:09:27,486 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 16:09:27,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:09:27,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:09:27,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:09:27,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:09:27,488 INFO L87 Difference]: Start difference. First operand 139 states and 420 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:09:27,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:09:27,844 INFO L93 Difference]: Finished difference Result 148 states and 429 transitions. [2023-12-02 16:09:27,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:09:27,845 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-12-02 16:09:27,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:09:27,846 INFO L225 Difference]: With dead ends: 148 [2023-12-02 16:09:27,847 INFO L226 Difference]: Without dead ends: 148 [2023-12-02 16:09:27,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:09:27,848 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:09:27,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 16:09:27,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-12-02 16:09:27,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2023-12-02 16:09:27,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.9183673469387754) internal successors, (429), 147 states have internal predecessors, (429), 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) [2023-12-02 16:09:27,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 429 transitions. [2023-12-02 16:09:27,858 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 429 transitions. Word has length 27 [2023-12-02 16:09:27,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:09:27,859 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 429 transitions. [2023-12-02 16:09:27,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:09:27,859 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 429 transitions. [2023-12-02 16:09:27,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-02 16:09:27,860 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:09:27,861 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:09:27,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-12-02 16:09:28,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 16:09:28,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2023-12-02 16:09:28,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 16:09:28,466 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-12-02 16:09:28,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:09:28,466 INFO L85 PathProgramCache]: Analyzing trace with hash 2027657647, now seen corresponding path program 2 times [2023-12-02 16:09:28,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:09:28,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [203008444] [2023-12-02 16:09:28,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 16:09:28,467 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:09:28,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:09:28,468 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:09:28,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-12-02 16:09:28,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-02 16:09:28,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:09:28,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 16:09:28,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:09:28,676 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-02 16:09:28,676 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:09:28,676 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:09:28,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [203008444] [2023-12-02 16:09:28,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [203008444] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:09:28,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:09:28,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 16:09:28,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197621478] [2023-12-02 16:09:28,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:09:28,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:09:28,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:09:28,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:09:28,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:09:28,678 INFO L87 Difference]: Start difference. First operand 148 states and 429 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:09:29,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:09:29,236 INFO L93 Difference]: Finished difference Result 312 states and 973 transitions. [2023-12-02 16:09:29,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 16:09:29,236 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-12-02 16:09:29,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:09:29,238 INFO L225 Difference]: With dead ends: 312 [2023-12-02 16:09:29,238 INFO L226 Difference]: Without dead ends: 267 [2023-12-02 16:09:29,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-12-02 16:09:29,239 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 55 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 16:09:29,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 5 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 16:09:29,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2023-12-02 16:09:29,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 166. [2023-12-02 16:09:29,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.9515151515151516) internal successors, (487), 165 states have internal predecessors, (487), 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) [2023-12-02 16:09:29,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 487 transitions. [2023-12-02 16:09:29,246 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 487 transitions. Word has length 36 [2023-12-02 16:09:29,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:09:29,247 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 487 transitions. [2023-12-02 16:09:29,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:09:29,247 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 487 transitions. [2023-12-02 16:09:29,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-02 16:09:29,248 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:09:29,248 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:09:29,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2023-12-02 16:09:29,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:09:29,448 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-12-02 16:09:29,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:09:29,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1318615701, now seen corresponding path program 3 times [2023-12-02 16:09:29,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:09:29,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1218821837] [2023-12-02 16:09:29,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 16:09:29,449 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:09:29,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:09:29,450 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:09:29,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-12-02 16:09:29,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-12-02 16:09:29,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:09:29,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 16:09:29,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:09:29,656 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-02 16:09:29,656 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:09:29,656 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:09:29,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1218821837] [2023-12-02 16:09:29,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1218821837] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:09:29,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:09:29,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 16:09:29,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688453706] [2023-12-02 16:09:29,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:09:29,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:09:29,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:09:29,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:09:29,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:09:29,659 INFO L87 Difference]: Start difference. First operand 166 states and 487 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:09:30,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:09:30,101 INFO L93 Difference]: Finished difference Result 302 states and 965 transitions. [2023-12-02 16:09:30,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 16:09:30,101 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-12-02 16:09:30,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:09:30,104 INFO L225 Difference]: With dead ends: 302 [2023-12-02 16:09:30,104 INFO L226 Difference]: Without dead ends: 277 [2023-12-02 16:09:30,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-12-02 16:09:30,105 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 54 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:09:30,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 3 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 16:09:30,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2023-12-02 16:09:30,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 176. [2023-12-02 16:09:30,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 3.0342857142857143) internal successors, (531), 175 states have internal predecessors, (531), 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) [2023-12-02 16:09:30,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 531 transitions. [2023-12-02 16:09:30,114 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 531 transitions. Word has length 36 [2023-12-02 16:09:30,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:09:30,114 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 531 transitions. [2023-12-02 16:09:30,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:09:30,114 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 531 transitions. [2023-12-02 16:09:30,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-02 16:09:30,116 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:09:30,116 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:09:30,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-12-02 16:09:30,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:09:30,319 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-12-02 16:09:30,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:09:30,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1903266215, now seen corresponding path program 4 times [2023-12-02 16:09:30,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:09:30,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1748210867] [2023-12-02 16:09:30,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 16:09:30,320 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:09:30,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:09:30,321 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:09:30,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-12-02 16:09:30,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 16:09:30,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:09:30,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 16:09:30,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:09:30,583 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 16:09:30,583 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:09:30,787 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 16:09:30,787 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:09:30,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1748210867] [2023-12-02 16:09:30,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1748210867] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:09:30,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1625531343] [2023-12-02 16:09:30,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 16:09:30,788 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 16:09:30,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 16:09:30,789 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 16:09:30,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2023-12-02 16:09:31,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 16:09:31,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:09:31,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 16:09:31,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:09:31,154 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 16:09:31,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:09:31,174 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 16:09:31,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1625531343] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:09:31,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86888563] [2023-12-02 16:09:31,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 16:09:31,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:09:31,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:09:31,176 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:09:31,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 16:09:31,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 16:09:31,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:09:31,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 16:09:31,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:09:31,475 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-02 16:09:31,475 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:09:31,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86888563] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:09:31,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2023-12-02 16:09:31,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 6, 6, 6] total 14 [2023-12-02 16:09:31,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736888896] [2023-12-02 16:09:31,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:09:31,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:09:31,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:09:31,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:09:31,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-12-02 16:09:31,477 INFO L87 Difference]: Start difference. First operand 176 states and 531 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:09:31,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:09:31,688 INFO L93 Difference]: Finished difference Result 241 states and 744 transitions. [2023-12-02 16:09:31,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:09:31,689 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-12-02 16:09:31,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:09:31,691 INFO L225 Difference]: With dead ends: 241 [2023-12-02 16:09:31,691 INFO L226 Difference]: Without dead ends: 208 [2023-12-02 16:09:31,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-12-02 16:09:31,692 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 12 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:09:31,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:09:31,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2023-12-02 16:09:31,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2023-12-02 16:09:31,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 3.028985507246377) internal successors, (627), 207 states have internal predecessors, (627), 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) [2023-12-02 16:09:31,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 627 transitions. [2023-12-02 16:09:31,703 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 627 transitions. Word has length 36 [2023-12-02 16:09:31,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:09:31,703 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 627 transitions. [2023-12-02 16:09:31,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:09:31,704 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 627 transitions. [2023-12-02 16:09:31,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 16:09:31,705 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:09:31,705 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:09:31,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-02 16:09:31,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-12-02 16:09:32,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2023-12-02 16:09:32,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 16:09:32,315 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-12-02 16:09:32,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:09:32,315 INFO L85 PathProgramCache]: Analyzing trace with hash -129269781, now seen corresponding path program 1 times [2023-12-02 16:09:32,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:09:32,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1594234209] [2023-12-02 16:09:32,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:09:32,316 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:09:32,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:09:32,317 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:09:32,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-12-02 16:09:32,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:09:32,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 16:09:32,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:09:32,588 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 16:09:32,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:09:32,745 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 16:09:32,745 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:09:32,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1594234209] [2023-12-02 16:09:32,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1594234209] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:09:32,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [184819069] [2023-12-02 16:09:32,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:09:32,746 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 16:09:32,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 16:09:32,747 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 16:09:32,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2023-12-02 16:09:33,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:09:33,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 16:09:33,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:09:33,112 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 16:09:33,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:09:33,131 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 16:09:33,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [184819069] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:09:33,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428544227] [2023-12-02 16:09:33,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:09:33,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:09:33,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:09:33,132 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:09:33,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 16:09:33,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:09:33,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 16:09:33,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:09:33,469 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-02 16:09:33,469 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:09:33,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428544227] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:09:33,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2023-12-02 16:09:33,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6, 6, 6] total 15 [2023-12-02 16:09:33,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091784289] [2023-12-02 16:09:33,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:09:33,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:09:33,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:09:33,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:09:33,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-12-02 16:09:33,471 INFO L87 Difference]: Start difference. First operand 208 states and 627 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:09:33,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:09:33,883 INFO L93 Difference]: Finished difference Result 297 states and 914 transitions. [2023-12-02 16:09:33,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:09:33,883 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-12-02 16:09:33,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:09:33,886 INFO L225 Difference]: With dead ends: 297 [2023-12-02 16:09:33,886 INFO L226 Difference]: Without dead ends: 297 [2023-12-02 16:09:33,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-12-02 16:09:33,887 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 28 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:09:33,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 4 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 16:09:33,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2023-12-02 16:09:33,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 228. [2023-12-02 16:09:33,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 3.0616740088105727) internal successors, (695), 227 states have internal predecessors, (695), 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) [2023-12-02 16:09:33,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 695 transitions. [2023-12-02 16:09:33,898 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 695 transitions. Word has length 37 [2023-12-02 16:09:33,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:09:33,899 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 695 transitions. [2023-12-02 16:09:33,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:09:33,899 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 695 transitions. [2023-12-02 16:09:33,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 16:09:33,900 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:09:33,901 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:09:33,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2023-12-02 16:09:34,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-02 16:09:34,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2023-12-02 16:09:34,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:09:34,502 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-12-02 16:09:34,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:09:34,502 INFO L85 PathProgramCache]: Analyzing trace with hash 832225137, now seen corresponding path program 2 times [2023-12-02 16:09:34,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:09:34,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [725176204] [2023-12-02 16:09:34,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 16:09:34,502 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:09:34,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:09:34,503 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:09:34,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-12-02 16:09:34,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 16:09:34,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:09:34,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 16:09:34,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:09:34,860 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-02 16:09:34,860 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:09:34,860 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:09:34,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [725176204] [2023-12-02 16:09:34,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [725176204] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:09:34,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:09:34,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:09:34,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933845070] [2023-12-02 16:09:34,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:09:34,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:09:34,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:09:34,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:09:34,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:09:34,862 INFO L87 Difference]: Start difference. First operand 228 states and 695 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:09:35,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:09:35,266 INFO L93 Difference]: Finished difference Result 250 states and 755 transitions. [2023-12-02 16:09:35,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:09:35,266 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-12-02 16:09:35,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:09:35,269 INFO L225 Difference]: With dead ends: 250 [2023-12-02 16:09:35,269 INFO L226 Difference]: Without dead ends: 238 [2023-12-02 16:09:35,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:09:35,270 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 26 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:09:35,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 4 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 16:09:35,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2023-12-02 16:09:35,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2023-12-02 16:09:35,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 3.0759493670886076) internal successors, (729), 237 states have internal predecessors, (729), 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) [2023-12-02 16:09:35,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 729 transitions. [2023-12-02 16:09:35,280 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 729 transitions. Word has length 37 [2023-12-02 16:09:35,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:09:35,280 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 729 transitions. [2023-12-02 16:09:35,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:09:35,280 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 729 transitions. [2023-12-02 16:09:35,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 16:09:35,281 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:09:35,281 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:09:35,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2023-12-02 16:09:35,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:09:35,482 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-12-02 16:09:35,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:09:35,482 INFO L85 PathProgramCache]: Analyzing trace with hash -505481621, now seen corresponding path program 3 times [2023-12-02 16:09:35,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:09:35,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [872035574] [2023-12-02 16:09:35,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 16:09:35,483 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:09:35,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:09:35,484 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:09:35,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-12-02 16:09:35,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 16:09:35,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:09:35,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 16:09:35,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:09:35,798 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-02 16:09:35,798 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:09:35,799 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:09:35,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [872035574] [2023-12-02 16:09:35,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [872035574] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:09:35,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:09:35,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:09:35,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720374731] [2023-12-02 16:09:35,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:09:35,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:09:35,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:09:35,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:09:35,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:09:35,800 INFO L87 Difference]: Start difference. First operand 238 states and 729 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:09:36,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:09:36,190 INFO L93 Difference]: Finished difference Result 258 states and 797 transitions. [2023-12-02 16:09:36,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:09:36,191 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-12-02 16:09:36,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:09:36,193 INFO L225 Difference]: With dead ends: 258 [2023-12-02 16:09:36,193 INFO L226 Difference]: Without dead ends: 258 [2023-12-02 16:09:36,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:09:36,193 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:09:36,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 4 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 16:09:36,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-12-02 16:09:36,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 228. [2023-12-02 16:09:36,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 3.0616740088105727) internal successors, (695), 227 states have internal predecessors, (695), 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) [2023-12-02 16:09:36,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 695 transitions. [2023-12-02 16:09:36,200 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 695 transitions. Word has length 37 [2023-12-02 16:09:36,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:09:36,201 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 695 transitions. [2023-12-02 16:09:36,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:09:36,201 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 695 transitions. [2023-12-02 16:09:36,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 16:09:36,202 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:09:36,202 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:09:36,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2023-12-02 16:09:36,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:09:36,402 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-12-02 16:09:36,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:09:36,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1419463285, now seen corresponding path program 4 times [2023-12-02 16:09:36,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:09:36,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [728923660] [2023-12-02 16:09:36,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 16:09:36,404 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:09:36,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:09:36,404 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:09:36,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-12-02 16:09:36,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 16:09:36,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:09:36,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 16:09:36,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:09:36,665 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 16:09:36,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:09:36,844 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 16:09:36,844 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:09:36,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [728923660] [2023-12-02 16:09:36,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [728923660] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:09:36,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [819471991] [2023-12-02 16:09:36,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 16:09:36,845 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 16:09:36,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 16:09:36,846 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 16:09:36,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2023-12-02 16:09:37,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 16:09:37,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:09:37,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 16:09:37,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:09:37,391 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 16:09:37,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:09:37,409 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 16:09:37,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [819471991] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:09:37,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233404254] [2023-12-02 16:09:37,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 16:09:37,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:09:37,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:09:37,411 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:09:37,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-02 16:09:37,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 16:09:37,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:09:37,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 16:09:37,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:09:37,695 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-02 16:09:37,695 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:09:37,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233404254] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:09:37,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2023-12-02 16:09:37,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6, 6, 6] total 15 [2023-12-02 16:09:37,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325966900] [2023-12-02 16:09:37,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:09:37,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:09:37,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:09:37,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:09:37,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-12-02 16:09:37,697 INFO L87 Difference]: Start difference. First operand 228 states and 695 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:09:38,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:09:38,046 INFO L93 Difference]: Finished difference Result 248 states and 763 transitions. [2023-12-02 16:09:38,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:09:38,046 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-12-02 16:09:38,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:09:38,048 INFO L225 Difference]: With dead ends: 248 [2023-12-02 16:09:38,048 INFO L226 Difference]: Without dead ends: 248 [2023-12-02 16:09:38,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-12-02 16:09:38,049 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 37 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:09:38,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 3 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 16:09:38,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-12-02 16:09:38,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 228. [2023-12-02 16:09:38,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 3.0616740088105727) internal successors, (695), 227 states have internal predecessors, (695), 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) [2023-12-02 16:09:38,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 695 transitions. [2023-12-02 16:09:38,059 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 695 transitions. Word has length 37 [2023-12-02 16:09:38,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:09:38,059 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 695 transitions. [2023-12-02 16:09:38,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:09:38,059 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 695 transitions. [2023-12-02 16:09:38,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-02 16:09:38,060 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:09:38,060 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:09:38,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-12-02 16:09:38,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2023-12-02 16:09:38,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2023-12-02 16:09:38,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:09:38,661 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-12-02 16:09:38,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:09:38,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1397829833, now seen corresponding path program 1 times [2023-12-02 16:09:38,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:09:38,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [895261471] [2023-12-02 16:09:38,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:09:38,662 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:09:38,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:09:38,663 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:09:38,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-12-02 16:09:38,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:09:38,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 16:09:38,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:09:38,910 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 16:09:38,910 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:09:39,080 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 16:09:39,080 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:09:39,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [895261471] [2023-12-02 16:09:39,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [895261471] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:09:39,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1248324720] [2023-12-02 16:09:39,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:09:39,081 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 16:09:39,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 16:09:39,082 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 16:09:39,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2023-12-02 16:09:39,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:09:39,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 16:09:39,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:09:39,494 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 16:09:39,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:09:39,513 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 16:09:39,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1248324720] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:09:39,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810916284] [2023-12-02 16:09:39,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:09:39,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:09:39,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:09:39,514 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:09:39,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-02 16:09:39,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:09:39,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 16:09:39,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:09:39,801 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 16:09:39,801 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:09:39,829 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 16:09:39,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810916284] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:09:39,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 16:09:39,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 11 [2023-12-02 16:09:39,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643808133] [2023-12-02 16:09:39,829 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 16:09:39,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 16:09:39,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:09:39,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 16:09:39,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-12-02 16:09:39,831 INFO L87 Difference]: Start difference. First operand 228 states and 695 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 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) [2023-12-02 16:09:40,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:09:40,279 INFO L93 Difference]: Finished difference Result 231 states and 698 transitions. [2023-12-02 16:09:40,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 16:09:40,280 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 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 38 [2023-12-02 16:09:40,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:09:40,282 INFO L225 Difference]: With dead ends: 231 [2023-12-02 16:09:40,282 INFO L226 Difference]: Without dead ends: 231 [2023-12-02 16:09:40,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-12-02 16:09:40,283 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:09:40,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 16:09:40,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-12-02 16:09:40,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2023-12-02 16:09:40,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 3.034782608695652) internal successors, (698), 230 states have internal predecessors, (698), 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) [2023-12-02 16:09:40,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 698 transitions. [2023-12-02 16:09:40,290 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 698 transitions. Word has length 38 [2023-12-02 16:09:40,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:09:40,290 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 698 transitions. [2023-12-02 16:09:40,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 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) [2023-12-02 16:09:40,290 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 698 transitions. [2023-12-02 16:09:40,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-02 16:09:40,291 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:09:40,291 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:09:40,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-12-02 16:09:40,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-12-02 16:09:40,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2023-12-02 16:09:40,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 16:09:40,892 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-12-02 16:09:40,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:09:40,892 INFO L85 PathProgramCache]: Analyzing trace with hash 2080501459, now seen corresponding path program 2 times [2023-12-02 16:09:40,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:09:40,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1908107774] [2023-12-02 16:09:40,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 16:09:40,893 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:09:40,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:09:40,894 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:09:40,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cbf0d6f-65b9-472c-a2eb-daeef1c085bd/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process