./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-data/process_queue.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_d8d2932b-12d5-4ef0-89fa-a9647f118dbb/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d2932b-12d5-4ef0-89fa-a9647f118dbb/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d2932b-12d5-4ef0-89fa-a9647f118dbb/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d2932b-12d5-4ef0-89fa-a9647f118dbb/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/heap-data/process_queue.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d2932b-12d5-4ef0-89fa-a9647f118dbb/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d2932b-12d5-4ef0-89fa-a9647f118dbb/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1ad9f94c1d10f7bc5f4235ca7c5dc51413b43a0e6c48b9e48da5d2e3e751252c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:13:45,802 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:13:45,902 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d2932b-12d5-4ef0-89fa-a9647f118dbb/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:13:45,915 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:13:45,916 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:13:45,949 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:13:45,950 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:13:45,951 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:13:45,951 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:13:45,952 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:13:45,953 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:13:45,953 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:13:45,954 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:13:45,954 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:13:45,955 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:13:45,956 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:13:45,956 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:13:45,957 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:13:45,957 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:13:45,958 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:13:45,959 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:13:45,960 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:13:45,960 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:13:45,961 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:13:45,961 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:13:45,962 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:13:45,962 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:13:45,963 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:13:45,963 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:13:45,964 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:13:45,964 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:13:45,965 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:13:45,965 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:13:45,966 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:13:45,966 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:13:45,967 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:13:45,967 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:13:45,968 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:13:45,968 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:13:45,969 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:13:45,969 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:13:45,970 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:13:45,970 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:13:45,971 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:13:45,973 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:13:45,973 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_d8d2932b-12d5-4ef0-89fa-a9647f118dbb/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d2932b-12d5-4ef0-89fa-a9647f118dbb/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ad9f94c1d10f7bc5f4235ca7c5dc51413b43a0e6c48b9e48da5d2e3e751252c [2023-11-19 05:13:46,263 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:13:46,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:13:46,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:13:46,307 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:13:46,308 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:13:46,311 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d2932b-12d5-4ef0-89fa-a9647f118dbb/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/heap-data/process_queue.i [2023-11-19 05:13:49,737 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:13:50,110 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:13:50,110 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d2932b-12d5-4ef0-89fa-a9647f118dbb/sv-benchmarks/c/heap-data/process_queue.i [2023-11-19 05:13:50,130 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d2932b-12d5-4ef0-89fa-a9647f118dbb/bin/utaipan-verify-t7M7D8N6sZ/data/990f7783d/28731fad5b9a4aad97883aec9d4ac729/FLAGb4a1e0996 [2023-11-19 05:13:50,153 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d2932b-12d5-4ef0-89fa-a9647f118dbb/bin/utaipan-verify-t7M7D8N6sZ/data/990f7783d/28731fad5b9a4aad97883aec9d4ac729 [2023-11-19 05:13:50,163 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:13:50,164 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:13:50,166 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:13:50,167 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:13:50,172 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:13:50,173 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:13:50" (1/1) ... [2023-11-19 05:13:50,174 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43cd8074 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:50, skipping insertion in model container [2023-11-19 05:13:50,175 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:13:50" (1/1) ... [2023-11-19 05:13:50,245 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:13:50,579 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_d8d2932b-12d5-4ef0-89fa-a9647f118dbb/sv-benchmarks/c/heap-data/process_queue.i[23979,23992] [2023-11-19 05:13:50,590 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:13:50,601 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:13:50,644 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_d8d2932b-12d5-4ef0-89fa-a9647f118dbb/sv-benchmarks/c/heap-data/process_queue.i[23979,23992] [2023-11-19 05:13:50,649 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:13:50,684 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:13:50,685 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:50 WrapperNode [2023-11-19 05:13:50,685 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:13:50,687 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:13:50,687 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:13:50,687 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:13:50,696 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:50" (1/1) ... [2023-11-19 05:13:50,715 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:50" (1/1) ... [2023-11-19 05:13:50,744 INFO L138 Inliner]: procedures = 127, calls = 32, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 117 [2023-11-19 05:13:50,745 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:13:50,746 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:13:50,746 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:13:50,746 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:13:50,756 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:50" (1/1) ... [2023-11-19 05:13:50,757 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:50" (1/1) ... [2023-11-19 05:13:50,761 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:50" (1/1) ... [2023-11-19 05:13:50,766 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:50" (1/1) ... [2023-11-19 05:13:50,786 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:50" (1/1) ... [2023-11-19 05:13:50,800 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:50" (1/1) ... [2023-11-19 05:13:50,802 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:50" (1/1) ... [2023-11-19 05:13:50,804 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:50" (1/1) ... [2023-11-19 05:13:50,807 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:13:50,808 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:13:50,809 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:13:50,809 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:13:50,810 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:50" (1/1) ... [2023-11-19 05:13:50,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:13:50,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d2932b-12d5-4ef0-89fa-a9647f118dbb/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:13:50,856 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d2932b-12d5-4ef0-89fa-a9647f118dbb/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:13:50,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d2932b-12d5-4ef0-89fa-a9647f118dbb/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:13:50,927 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 05:13:50,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 05:13:50,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 05:13:50,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:13:50,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 05:13:50,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 05:13:50,931 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 05:13:50,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 05:13:50,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-19 05:13:50,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:13:50,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:13:50,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:13:51,097 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:13:51,099 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:13:51,402 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:13:51,581 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:13:51,582 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 05:13:51,587 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:13:51 BoogieIcfgContainer [2023-11-19 05:13:51,587 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:13:51,590 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:13:51,591 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:13:51,594 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:13:51,594 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:13:50" (1/3) ... [2023-11-19 05:13:51,595 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72e1b70b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:13:51, skipping insertion in model container [2023-11-19 05:13:51,596 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:50" (2/3) ... [2023-11-19 05:13:51,596 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72e1b70b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:13:51, skipping insertion in model container [2023-11-19 05:13:51,596 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:13:51" (3/3) ... [2023-11-19 05:13:51,598 INFO L112 eAbstractionObserver]: Analyzing ICFG process_queue.i [2023-11-19 05:13:51,618 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:13:51,619 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:13:51,668 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:13:51,675 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;@2b35ef79, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:13:51,676 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:13:51,681 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:51,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-19 05:13:51,688 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:13:51,690 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:13:51,691 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:13:51,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:13:51,698 INFO L85 PathProgramCache]: Analyzing trace with hash 462497225, now seen corresponding path program 1 times [2023-11-19 05:13:51,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:13:51,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888963099] [2023-11-19 05:13:51,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:13:51,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:13:51,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:13:52,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:13:52,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:13:52,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888963099] [2023-11-19 05:13:52,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888963099] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:13:52,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:13:52,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:13:52,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156207552] [2023-11-19 05:13:52,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:13:52,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:13:52,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:13:52,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:13:52,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:13:52,731 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 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 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:53,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:13:53,151 INFO L93 Difference]: Finished difference Result 53 states and 80 transitions. [2023-11-19 05:13:53,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:13:53,154 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2023-11-19 05:13:53,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:13:53,164 INFO L225 Difference]: With dead ends: 53 [2023-11-19 05:13:53,164 INFO L226 Difference]: Without dead ends: 36 [2023-11-19 05:13:53,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:13:53,171 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 30 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:13:53,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 48 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:13:53,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-19 05:13:53,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2023-11-19 05:13:53,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 30 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) [2023-11-19 05:13:53,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 44 transitions. [2023-11-19 05:13:53,214 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 44 transitions. Word has length 8 [2023-11-19 05:13:53,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:13:53,215 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 44 transitions. [2023-11-19 05:13:53,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:53,216 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 44 transitions. [2023-11-19 05:13:53,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-19 05:13:53,217 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:13:53,217 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:13:53,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:13:53,217 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:13:53,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:13:53,218 INFO L85 PathProgramCache]: Analyzing trace with hash -639504146, now seen corresponding path program 1 times [2023-11-19 05:13:53,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:13:53,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048966799] [2023-11-19 05:13:53,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:13:53,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:13:53,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:13:53,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:13:53,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:13:53,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048966799] [2023-11-19 05:13:53,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048966799] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:13:53,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:13:53,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:13:53,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196807544] [2023-11-19 05:13:53,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:13:53,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:13:53,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:13:53,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:13:53,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:13:53,304 INFO L87 Difference]: Start difference. First operand 31 states and 44 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:53,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:13:53,465 INFO L93 Difference]: Finished difference Result 59 states and 84 transitions. [2023-11-19 05:13:53,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:13:53,466 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2023-11-19 05:13:53,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:13:53,467 INFO L225 Difference]: With dead ends: 59 [2023-11-19 05:13:53,468 INFO L226 Difference]: Without dead ends: 29 [2023-11-19 05:13:53,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:13:53,470 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:13:53,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 24 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:13:53,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-19 05:13:53,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-19 05:13:53,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:53,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2023-11-19 05:13:53,478 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 9 [2023-11-19 05:13:53,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:13:53,479 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2023-11-19 05:13:53,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:53,482 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2023-11-19 05:13:53,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-19 05:13:53,483 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:13:53,483 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:13:53,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:13:53,483 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:13:53,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:13:53,484 INFO L85 PathProgramCache]: Analyzing trace with hash 3657053, now seen corresponding path program 1 times [2023-11-19 05:13:53,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:13:53,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051590733] [2023-11-19 05:13:53,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:13:53,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:13:53,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:13:54,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:13:54,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:13:54,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051590733] [2023-11-19 05:13:54,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051590733] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:13:54,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607228420] [2023-11-19 05:13:54,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:13:54,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:13:54,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d2932b-12d5-4ef0-89fa-a9647f118dbb/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:13:54,163 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d2932b-12d5-4ef0-89fa-a9647f118dbb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:13:54,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d2932b-12d5-4ef0-89fa-a9647f118dbb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:13:54,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:13:54,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-19 05:13:54,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:13:54,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-19 05:13:54,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:13:54,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:13:54,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 28 [2023-11-19 05:13:54,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-11-19 05:13:54,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 11 [2023-11-19 05:13:54,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:13:54,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-19 05:13:54,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:13:54,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:13:54,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2023-11-19 05:13:54,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 3 [2023-11-19 05:13:54,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-11-19 05:13:54,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:13:54,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:13:55,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:13:55,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607228420] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:13:55,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1041573760] [2023-11-19 05:13:55,311 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-19 05:13:55,311 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:13:55,315 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:13:55,321 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:13:55,321 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:13:55,921 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:13:57,853 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '325#(and (<= 1 |#StackHeapBarrier|) (<= (select (select |#memory_int| |ULTIMATE.start_check_queue_~n~0#1.base|) (+ |ULTIMATE.start_check_queue_~n~0#1.offset| 4)) 0) (= |ULTIMATE.start_main_~#queue~0#1.offset| 0) (or (not (= |ULTIMATE.start_check_queue_~n~0#1.offset| 0)) (not (= |ULTIMATE.start_check_queue_~n~0#1.base| 0))) (= 2 |ULTIMATE.start_main_~next_time~0#1|) (<= 2 |ULTIMATE.start_main_~#queue~0#1.base|))' at error location [2023-11-19 05:13:57,853 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:13:57,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:13:57,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-19 05:13:57,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894996024] [2023-11-19 05:13:57,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:13:57,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 05:13:57,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:13:57,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 05:13:57,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-11-19 05:13:57,856 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 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) [2023-11-19 05:13:58,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:13:58,664 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2023-11-19 05:13:58,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:13:58,664 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 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 11 [2023-11-19 05:13:58,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:13:58,665 INFO L225 Difference]: With dead ends: 50 [2023-11-19 05:13:58,666 INFO L226 Difference]: Without dead ends: 28 [2023-11-19 05:13:58,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2023-11-19 05:13:58,668 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 28 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 05:13:58,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 61 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 05:13:58,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-19 05:13:58,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-11-19 05:13:58,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:58,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2023-11-19 05:13:58,682 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 11 [2023-11-19 05:13:58,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:13:58,682 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2023-11-19 05:13:58,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 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) [2023-11-19 05:13:58,683 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2023-11-19 05:13:58,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-19 05:13:58,685 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:13:58,685 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-19 05:13:58,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d2932b-12d5-4ef0-89fa-a9647f118dbb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:13:58,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d2932b-12d5-4ef0-89fa-a9647f118dbb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:13:58,907 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:13:58,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:13:58,907 INFO L85 PathProgramCache]: Analyzing trace with hash 481145250, now seen corresponding path program 1 times [2023-11-19 05:13:58,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:13:58,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917731560] [2023-11-19 05:13:58,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:13:58,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:13:58,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:13:59,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:13:59,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:13:59,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917731560] [2023-11-19 05:13:59,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917731560] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:13:59,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:13:59,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:13:59,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643676920] [2023-11-19 05:13:59,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:13:59,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:13:59,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:13:59,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:13:59,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:13:59,044 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:59,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:13:59,259 INFO L93 Difference]: Finished difference Result 65 states and 87 transitions. [2023-11-19 05:13:59,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:13:59,259 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2023-11-19 05:13:59,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:13:59,260 INFO L225 Difference]: With dead ends: 65 [2023-11-19 05:13:59,260 INFO L226 Difference]: Without dead ends: 44 [2023-11-19 05:13:59,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:13:59,262 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:13:59,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 25 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:13:59,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-19 05:13:59,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2023-11-19 05:13:59,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:59,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 51 transitions. [2023-11-19 05:13:59,276 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 51 transitions. Word has length 13 [2023-11-19 05:13:59,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:13:59,277 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 51 transitions. [2023-11-19 05:13:59,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:13:59,277 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 51 transitions. [2023-11-19 05:13:59,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 05:13:59,278 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:13:59,278 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-19 05:13:59,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:13:59,279 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:13:59,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:13:59,279 INFO L85 PathProgramCache]: Analyzing trace with hash 631547534, now seen corresponding path program 1 times [2023-11-19 05:13:59,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:13:59,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981260942] [2023-11-19 05:13:59,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:13:59,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:13:59,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:13:59,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:13:59,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:13:59,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981260942] [2023-11-19 05:13:59,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981260942] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:13:59,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235607440] [2023-11-19 05:13:59,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:13:59,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:13:59,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d2932b-12d5-4ef0-89fa-a9647f118dbb/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:13:59,872 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d2932b-12d5-4ef0-89fa-a9647f118dbb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:13:59,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d2932b-12d5-4ef0-89fa-a9647f118dbb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:14:00,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:00,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-19 05:14:00,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:14:00,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 42 [2023-11-19 05:14:00,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:14:00,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-19 05:14:00,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:14:00,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 51 [2023-11-19 05:14:00,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2023-11-19 05:14:00,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:14:00,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:14:00,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2023-11-19 05:14:00,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2023-11-19 05:14:00,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:14:00,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2023-11-19 05:14:00,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-11-19 05:14:00,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-19 05:14:00,279 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:14:00,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:14:00,337 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:14:00,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 35 [2023-11-19 05:14:00,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2023-11-19 05:14:00,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-11-19 05:14:00,439 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:14:00,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235607440] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:14:00,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1943155072] [2023-11-19 05:14:00,443 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-19 05:14:00,443 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:14:00,443 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:14:00,443 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:14:00,444 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:14:01,571 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:14:02,516 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '688#(and (<= 1 |#StackHeapBarrier|) (<= (select (select |#memory_int| |ULTIMATE.start_check_queue_~n~0#1.base|) (+ |ULTIMATE.start_check_queue_~n~0#1.offset| 4)) 0) (<= 2 |ULTIMATE.start_main_~next_time~0#1|) (= |ULTIMATE.start_main_~#queue~0#1.offset| 0) (or (not (= |ULTIMATE.start_check_queue_~n~0#1.offset| 0)) (not (= |ULTIMATE.start_check_queue_~n~0#1.base| 0))) (<= |ULTIMATE.start_main_~next_time~0#1| 1000) (<= 2 |ULTIMATE.start_main_~#queue~0#1.base|))' at error location [2023-11-19 05:14:02,516 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:14:02,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:14:02,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-19 05:14:02,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019605542] [2023-11-19 05:14:02,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:14:02,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 05:14:02,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:02,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 05:14:02,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2023-11-19 05:14:02,518 INFO L87 Difference]: Start difference. First operand 38 states and 51 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2023-11-19 05:14:03,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:03,873 INFO L93 Difference]: Finished difference Result 167 states and 220 transitions. [2023-11-19 05:14:03,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-19 05:14:03,874 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 16 [2023-11-19 05:14:03,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:03,876 INFO L225 Difference]: With dead ends: 167 [2023-11-19 05:14:03,876 INFO L226 Difference]: Without dead ends: 136 [2023-11-19 05:14:03,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=305, Invalid=1255, Unknown=0, NotChecked=0, Total=1560 [2023-11-19 05:14:03,878 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 140 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:03,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 102 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 05:14:03,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-11-19 05:14:03,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 85. [2023-11-19 05:14:03,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.2976190476190477) internal successors, (109), 84 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:03,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 109 transitions. [2023-11-19 05:14:03,904 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 109 transitions. Word has length 16 [2023-11-19 05:14:03,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:03,904 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 109 transitions. [2023-11-19 05:14:03,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2023-11-19 05:14:03,905 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 109 transitions. [2023-11-19 05:14:03,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 05:14:03,905 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:03,906 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2023-11-19 05:14:03,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d2932b-12d5-4ef0-89fa-a9647f118dbb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:14:04,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d2932b-12d5-4ef0-89fa-a9647f118dbb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:14:04,123 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:14:04,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:04,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1815225736, now seen corresponding path program 2 times [2023-11-19 05:14:04,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:04,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678476634] [2023-11-19 05:14:04,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:04,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:04,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:05,306 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:14:05,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:05,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678476634] [2023-11-19 05:14:05,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678476634] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:14:05,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699817843] [2023-11-19 05:14:05,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 05:14:05,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:14:05,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d2932b-12d5-4ef0-89fa-a9647f118dbb/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:14:05,312 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d2932b-12d5-4ef0-89fa-a9647f118dbb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:14:05,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d2932b-12d5-4ef0-89fa-a9647f118dbb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:14:05,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 05:14:05,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:14:05,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 74 conjunts are in the unsatisfiable core [2023-11-19 05:14:05,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:14:05,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-19 05:14:05,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2023-11-19 05:14:05,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:14:05,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2023-11-19 05:14:05,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 39 [2023-11-19 05:14:05,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-19 05:14:05,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2023-11-19 05:14:05,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-11-19 05:14:05,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-19 05:14:05,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:14:05,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:14:05,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 107 [2023-11-19 05:14:05,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 5 [2023-11-19 05:14:05,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2023-11-19 05:14:05,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:14:05,943 INFO L349 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2023-11-19 05:14:05,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 26 [2023-11-19 05:14:05,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:14:05,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2023-11-19 05:14:05,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:14:05,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:14:05,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 28 [2023-11-19 05:14:05,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-11-19 05:14:05,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 11 [2023-11-19 05:14:06,189 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-19 05:14:06,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 34 [2023-11-19 05:14:06,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:14:06,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-19 05:14:06,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-19 05:14:06,208 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:14:06,208 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:14:06,714 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:14:06,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 222 treesize of output 233 [2023-11-19 05:14:06,722 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:14:06,756 INFO L349 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2023-11-19 05:14:06,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 696 treesize of output 688 [2023-11-19 05:14:06,765 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:14:06,831 INFO L349 Elim1Store]: treesize reduction 104, result has 51.4 percent of original size [2023-11-19 05:14:06,832 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 1163 treesize of output 981 [2023-11-19 05:14:06,846 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:14:06,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1233 treesize of output 1213 [2023-11-19 05:14:06,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 319 treesize of output 303 [2023-11-19 05:14:06,950 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:14:06,950 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 259 treesize of output 256 [2023-11-19 05:14:06,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 283 treesize of output 269 [2023-11-19 05:14:07,015 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:14:07,015 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 171 treesize of output 157 [2023-11-19 05:14:07,046 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-19 05:14:07,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 4 [2023-11-19 05:14:07,531 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:14:07,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699817843] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:14:07,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1940714304] [2023-11-19 05:14:07,534 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-19 05:14:07,535 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:14:07,535 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:14:07,535 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:14:07,535 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:14:08,567 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:14:09,471 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1188#(and (<= 1 |#StackHeapBarrier|) (<= (select (select |#memory_int| |ULTIMATE.start_check_queue_~n~0#1.base|) (+ |ULTIMATE.start_check_queue_~n~0#1.offset| 4)) 0) (<= 2 |ULTIMATE.start_main_~next_time~0#1|) (= |ULTIMATE.start_main_~#queue~0#1.offset| 0) (or (not (= |ULTIMATE.start_check_queue_~n~0#1.offset| 0)) (not (= |ULTIMATE.start_check_queue_~n~0#1.base| 0))) (<= |ULTIMATE.start_main_~next_time~0#1| 1000) (<= 2 |ULTIMATE.start_main_~#queue~0#1.base|))' at error location [2023-11-19 05:14:09,472 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:14:09,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:14:09,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 20 [2023-11-19 05:14:09,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499573952] [2023-11-19 05:14:09,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:14:09,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-19 05:14:09,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:09,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-19 05:14:09,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2023-11-19 05:14:09,475 INFO L87 Difference]: Start difference. First operand 85 states and 109 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:13,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:13,393 INFO L93 Difference]: Finished difference Result 185 states and 239 transitions. [2023-11-19 05:14:13,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-19 05:14:13,394 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-19 05:14:13,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:13,396 INFO L225 Difference]: With dead ends: 185 [2023-11-19 05:14:13,397 INFO L226 Difference]: Without dead ends: 183 [2023-11-19 05:14:13,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=539, Invalid=2217, Unknown=0, NotChecked=0, Total=2756 [2023-11-19 05:14:13,400 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 229 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:13,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 124 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-19 05:14:13,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-11-19 05:14:13,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 125. [2023-11-19 05:14:13,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.314516129032258) internal successors, (163), 124 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:13,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 163 transitions. [2023-11-19 05:14:13,441 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 163 transitions. Word has length 19 [2023-11-19 05:14:13,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:13,442 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 163 transitions. [2023-11-19 05:14:13,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:13,442 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 163 transitions. [2023-11-19 05:14:13,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 05:14:13,443 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:13,443 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:14:13,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d2932b-12d5-4ef0-89fa-a9647f118dbb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:14:13,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d2932b-12d5-4ef0-89fa-a9647f118dbb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:14:13,644 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:14:13,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:13,645 INFO L85 PathProgramCache]: Analyzing trace with hash 866955746, now seen corresponding path program 1 times [2023-11-19 05:14:13,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:13,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73931104] [2023-11-19 05:14:13,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:13,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:13,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:14,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:14:14,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:14,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73931104] [2023-11-19 05:14:14,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73931104] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:14:14,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739839710] [2023-11-19 05:14:14,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:14,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:14:14,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d2932b-12d5-4ef0-89fa-a9647f118dbb/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:14:14,916 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d2932b-12d5-4ef0-89fa-a9647f118dbb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:14:14,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d2932b-12d5-4ef0-89fa-a9647f118dbb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:14:15,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:15,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 87 conjunts are in the unsatisfiable core [2023-11-19 05:14:15,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:14:15,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-19 05:14:15,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:14:15,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 34 [2023-11-19 05:14:15,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 11 [2023-11-19 05:14:15,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:14:15,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:14:15,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 28 [2023-11-19 05:14:15,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-11-19 05:14:15,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 11 [2023-11-19 05:14:15,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:14:15,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:14:15,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2023-11-19 05:14:15,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 3 [2023-11-19 05:14:15,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-11-19 05:14:15,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:14:15,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-19 05:14:15,617 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:14:15,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 40 [2023-11-19 05:14:15,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:14:15,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-11-19 05:14:15,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-19 05:14:15,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:14:15,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:14:16,020 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse5 (+ |c_ULTIMATE.start_choose_next_~node~0#1.offset| 4))) (let ((.cse1 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_choose_next_~node~0#1.base|)) (.cse0 (= (select (select |c_#memory_int| |c_ULTIMATE.start_choose_next_~node~0#1.base|) .cse5) 1))) (and (or (not .cse0) (let ((.cse3 (= |c_ULTIMATE.start_choose_next_~prev~0#1.base| 0)) (.cse4 (= |c_ULTIMATE.start_choose_next_~prev~0#1.offset| 0))) (and (or (let ((.cse2 (+ |c_ULTIMATE.start_choose_next_~node~0#1.offset| 8))) (and (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_choose_next_~q#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_choose_next_~q#1.base|) |c_ULTIMATE.start_choose_next_~q#1.offset| (select .cse1 .cse2))) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|) 0) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_choose_next_~q#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_choose_next_~q#1.base|) |c_ULTIMATE.start_choose_next_~q#1.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_choose_next_~node~0#1.base|) .cse2))) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|) 0))) (not .cse3) (not .cse4)) (or (and (forall ((v_DerPreprocessor_8 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_choose_next_~prev~0#1.base| v_DerPreprocessor_8) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|) 0)) (forall ((v_DerPreprocessor_9 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_choose_next_~prev~0#1.base| v_DerPreprocessor_9) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|) 0))) (and .cse3 .cse4))))) (or (and (forall ((v_DerPreprocessor_7 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_choose_next_~node~0#1.base| v_DerPreprocessor_7) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|) 0)) (forall ((v_DerPreprocessor_6 Int)) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_choose_next_~node~0#1.base| (store .cse1 .cse5 v_DerPreprocessor_6)) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|) 0))) .cse0)))) is different from false [2023-11-19 05:14:16,052 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse5 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) (let ((.cse3 (+ .cse5 4)) (.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) (let ((.cse2 (select |c_#memory_$Pointer$.offset| .cse1)) (.cse0 (= (select (select |c_#memory_int| .cse1) .cse3) 1))) (and (or .cse0 (and (forall ((v_DerPreprocessor_6 Int)) (= 0 (select (select (store |c_#memory_$Pointer$.offset| .cse1 (store .cse2 .cse3 v_DerPreprocessor_6)) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) (forall ((v_DerPreprocessor_7 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| .cse1 v_DerPreprocessor_7) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|) 0)))) (or (let ((.cse4 (+ .cse5 8))) (and (= (select .cse2 .cse4) 0) (= (select (select |c_#memory_$Pointer$.base| .cse1) .cse4) 0))) (not .cse0)))))) is different from false [2023-11-19 05:14:16,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 249 treesize of output 247 [2023-11-19 05:14:16,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 229 treesize of output 225 [2023-11-19 05:14:16,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-19 05:14:16,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 7 not checked. [2023-11-19 05:14:16,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739839710] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:14:16,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1179993016] [2023-11-19 05:14:16,606 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-11-19 05:14:16,606 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:14:16,607 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:14:16,607 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:14:16,607 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:14:23,498 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:14:23,949 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1779#(and (<= 1 |#StackHeapBarrier|) (<= (select (select |#memory_int| |ULTIMATE.start_check_queue_~n~0#1.base|) (+ |ULTIMATE.start_check_queue_~n~0#1.offset| 4)) 0) (= |ULTIMATE.start_main_~#queue~0#1.offset| 0) (or (not (= |ULTIMATE.start_check_queue_~n~0#1.offset| 0)) (not (= |ULTIMATE.start_check_queue_~n~0#1.base| 0))) (<= 2 |ULTIMATE.start_main_~#queue~0#1.base|))' at error location [2023-11-19 05:14:23,949 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:14:23,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:14:23,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 6] total 22 [2023-11-19 05:14:23,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115483773] [2023-11-19 05:14:23,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:14:23,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-19 05:14:23,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:23,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-19 05:14:23,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=662, Unknown=2, NotChecked=106, Total=870 [2023-11-19 05:14:23,952 INFO L87 Difference]: Start difference. First operand 125 states and 163 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:26,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:26,449 INFO L93 Difference]: Finished difference Result 218 states and 290 transitions. [2023-11-19 05:14:26,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-19 05:14:26,450 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-19 05:14:26,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:26,451 INFO L225 Difference]: With dead ends: 218 [2023-11-19 05:14:26,451 INFO L226 Difference]: Without dead ends: 103 [2023-11-19 05:14:26,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=419, Invalid=2343, Unknown=2, NotChecked=206, Total=2970 [2023-11-19 05:14:26,454 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 110 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:26,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 101 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 209 Invalid, 0 Unknown, 160 Unchecked, 1.4s Time] [2023-11-19 05:14:26,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-19 05:14:26,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 86. [2023-11-19 05:14:26,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.3294117647058823) internal successors, (113), 85 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:26,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 113 transitions. [2023-11-19 05:14:26,476 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 113 transitions. Word has length 19 [2023-11-19 05:14:26,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:26,476 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 113 transitions. [2023-11-19 05:14:26,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:14:26,477 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 113 transitions. [2023-11-19 05:14:26,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-19 05:14:26,478 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:26,478 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:14:26,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d2932b-12d5-4ef0-89fa-a9647f118dbb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:14:26,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d2932b-12d5-4ef0-89fa-a9647f118dbb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 05:14:26,691 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:14:26,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:26,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1343851600, now seen corresponding path program 2 times [2023-11-19 05:14:26,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:26,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521831110] [2023-11-19 05:14:26,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:26,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:26,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:28,137 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:14:28,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:28,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521831110] [2023-11-19 05:14:28,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521831110] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:14:28,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747334916] [2023-11-19 05:14:28,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 05:14:28,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:14:28,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d2932b-12d5-4ef0-89fa-a9647f118dbb/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:14:28,139 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d2932b-12d5-4ef0-89fa-a9647f118dbb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:14:28,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d2932b-12d5-4ef0-89fa-a9647f118dbb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 05:14:28,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 05:14:28,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:14:28,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-19 05:14:28,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:14:28,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-19 05:14:28,478 INFO L349 Elim1Store]: treesize reduction 110, result has 44.7 percent of original size [2023-11-19 05:14:28,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 182 treesize of output 344 [2023-11-19 05:14:28,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 160 [2023-11-19 05:14:28,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 4 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 230 [2023-11-19 05:14:28,586 INFO L349 Elim1Store]: treesize reduction 73, result has 14.1 percent of original size [2023-11-19 05:14:28,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 170 treesize of output 138 [2023-11-19 05:14:29,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 5 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 1104 treesize of output 1226 [2023-11-19 05:14:31,367 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:14:31,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 43 [2023-11-19 05:14:31,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 43 [2023-11-19 05:14:31,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 43 [2023-11-19 05:14:31,439 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:14:31,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 43 [2023-11-19 05:14:31,562 INFO L349 Elim1Store]: treesize reduction 94, result has 48.6 percent of original size [2023-11-19 05:14:31,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 166 treesize of output 328 [2023-11-19 05:14:31,590 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:14:31,622 INFO L349 Elim1Store]: treesize reduction 61, result has 16.4 percent of original size [2023-11-19 05:14:31,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 95 treesize of output 99 [2023-11-19 05:14:31,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 4 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 206 [2023-11-19 05:14:31,687 INFO L349 Elim1Store]: treesize reduction 41, result has 22.6 percent of original size [2023-11-19 05:14:31,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 68 treesize of output 51 [2023-11-19 05:14:31,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2023-11-19 05:14:31,740 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:14:31,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 5 [2023-11-19 05:14:31,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 237 [2023-11-19 05:14:31,985 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:14:31,986 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:14:31,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 24 [2023-11-19 05:14:32,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-11-19 05:14:32,099 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-19 05:14:32,099 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 15 treesize of output 15 [2023-11-19 05:14:32,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 42 [2023-11-19 05:14:32,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-19 05:14:32,918 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-11-19 05:14:32,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 416 treesize of output 310 [2023-11-19 05:14:32,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:14:32,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2023-11-19 05:14:32,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-11-19 05:14:32,957 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:14:32,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:14:33,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-19 05:14:33,189 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse5 (= |c_ULTIMATE.start_choose_next_~prev~0#1.offset| 0)) (.cse4 (= |c_ULTIMATE.start_choose_next_~prev~0#1.base| 0))) (let ((.cse0 (not .cse4)) (.cse2 (not .cse5)) (.cse3 (and .cse4 .cse5)) (.cse1 (+ |c_ULTIMATE.start_choose_next_~node~0#1.offset| 8))) (and (or .cse0 (forall ((v_DerPreprocessor_63 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_choose_next_~q#1.base| v_DerPreprocessor_63) |c_ULTIMATE.start_choose_next_~node~0#1.base|) .cse1) 0)) .cse2) (or .cse0 (forall ((v_DerPreprocessor_60 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_choose_next_~q#1.base| v_DerPreprocessor_60) |c_ULTIMATE.start_choose_next_~node~0#1.base|) .cse1) 0)) .cse2) (or .cse3 (forall ((v_DerPreprocessor_64 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_choose_next_~prev~0#1.base| v_DerPreprocessor_64) |c_ULTIMATE.start_choose_next_~node~0#1.base|) .cse1) 0))) (or .cse3 (forall ((v_DerPreprocessor_59 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_choose_next_~prev~0#1.base| v_DerPreprocessor_59) |c_ULTIMATE.start_choose_next_~node~0#1.base|) .cse1) 0))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_choose_next_~node~0#1.base|) (+ |c_ULTIMATE.start_choose_next_~node~0#1.offset| 4)) 1)))) is different from false [2023-11-19 05:14:33,202 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (.cse2 (+ .cse1 8))) (and (= (select (select |c_#memory_int| .cse0) (+ .cse1 4)) 1) (forall ((v_DerPreprocessor_63 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#queue~0#1.base| v_DerPreprocessor_63) .cse0) .cse2) 0)) (forall ((v_DerPreprocessor_60 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#queue~0#1.base| v_DerPreprocessor_60) .cse0) .cse2) 0))))) is different from false [2023-11-19 05:14:33,289 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:14:33,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 82 [2023-11-19 05:14:33,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 70 [2023-11-19 05:14:33,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 63 [2023-11-19 05:14:33,412 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2023-11-19 05:14:33,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747334916] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:14:33,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1218757886] [2023-11-19 05:14:33,417 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-11-19 05:14:33,417 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:14:33,417 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:14:33,418 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:14:33,418 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs