./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-pthread/cs_queue-1.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_fdfe6655-d458-4865-bd07-a2036562f6ad/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfe6655-d458-4865-bd07-a2036562f6ad/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_fdfe6655-d458-4865-bd07-a2036562f6ad/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfe6655-d458-4865-bd07-a2036562f6ad/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-pthread/cs_queue-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfe6655-d458-4865-bd07-a2036562f6ad/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_fdfe6655-d458-4865-bd07-a2036562f6ad/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 38d92478d67c3996e3815aaa6d0075347cfc456da7f20d1b1bb733d11593b6cf --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:02:13,540 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:02:13,674 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfe6655-d458-4865-bd07-a2036562f6ad/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:02:13,686 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:02:13,687 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:02:13,729 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:02:13,732 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:02:13,733 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:02:13,734 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:02:13,739 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:02:13,740 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:02:13,741 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:02:13,742 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:02:13,744 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:02:13,745 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:02:13,745 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:02:13,746 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:02:13,746 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:02:13,747 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:02:13,747 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:02:13,748 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:02:13,748 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:02:13,750 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:02:13,750 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:02:13,751 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:02:13,751 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:02:13,752 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:02:13,753 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:02:13,753 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:02:13,754 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:02:13,755 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:02:13,756 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:02:13,756 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:02:13,756 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:02:13,757 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:02:13,757 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:02:13,757 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:02:13,758 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:02:13,758 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:02:13,759 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:02:13,759 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:02:13,759 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:02:13,760 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:02:13,760 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:02:13,761 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:02:13,761 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_fdfe6655-d458-4865-bd07-a2036562f6ad/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfe6655-d458-4865-bd07-a2036562f6ad/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 38d92478d67c3996e3815aaa6d0075347cfc456da7f20d1b1bb733d11593b6cf [2023-11-19 05:02:14,081 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:02:14,115 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:02:14,118 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:02:14,120 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:02:14,122 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:02:14,125 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfe6655-d458-4865-bd07-a2036562f6ad/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/seq-pthread/cs_queue-1.i [2023-11-19 05:02:17,834 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:02:18,223 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:02:18,224 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfe6655-d458-4865-bd07-a2036562f6ad/sv-benchmarks/c/seq-pthread/cs_queue-1.i [2023-11-19 05:02:18,253 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfe6655-d458-4865-bd07-a2036562f6ad/bin/utaipan-verify-t7M7D8N6sZ/data/7c757db30/451b6877e9ed4f84a8c109117ed0e769/FLAG82f71f293 [2023-11-19 05:02:18,273 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfe6655-d458-4865-bd07-a2036562f6ad/bin/utaipan-verify-t7M7D8N6sZ/data/7c757db30/451b6877e9ed4f84a8c109117ed0e769 [2023-11-19 05:02:18,276 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:02:18,278 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:02:18,280 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:02:18,280 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:02:18,286 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:02:18,287 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:02:18" (1/1) ... [2023-11-19 05:02:18,289 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f5e63aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:18, skipping insertion in model container [2023-11-19 05:02:18,289 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:02:18" (1/1) ... [2023-11-19 05:02:18,394 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:02:18,934 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_fdfe6655-d458-4865-bd07-a2036562f6ad/sv-benchmarks/c/seq-pthread/cs_queue-1.i[34744,34757] [2023-11-19 05:02:19,167 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:02:19,215 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:02:19,263 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_fdfe6655-d458-4865-bd07-a2036562f6ad/sv-benchmarks/c/seq-pthread/cs_queue-1.i[34744,34757] [2023-11-19 05:02:19,388 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:02:19,537 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:02:19,538 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:19 WrapperNode [2023-11-19 05:02:19,538 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:02:19,540 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:02:19,540 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:02:19,540 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:02:19,550 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:19" (1/1) ... [2023-11-19 05:02:19,621 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:19" (1/1) ... [2023-11-19 05:02:19,737 INFO L138 Inliner]: procedures = 251, calls = 534, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 1166 [2023-11-19 05:02:19,738 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:02:19,739 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:02:19,739 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:02:19,740 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:02:19,752 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:19" (1/1) ... [2023-11-19 05:02:19,752 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:19" (1/1) ... [2023-11-19 05:02:19,770 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:19" (1/1) ... [2023-11-19 05:02:19,770 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:19" (1/1) ... [2023-11-19 05:02:19,842 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:19" (1/1) ... [2023-11-19 05:02:19,854 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:19" (1/1) ... [2023-11-19 05:02:19,863 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:19" (1/1) ... [2023-11-19 05:02:19,891 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:19" (1/1) ... [2023-11-19 05:02:19,903 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:02:19,905 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:02:19,905 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:02:19,905 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:02:19,906 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:19" (1/1) ... [2023-11-19 05:02:19,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:02:19,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfe6655-d458-4865-bd07-a2036562f6ad/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:02:19,958 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfe6655-d458-4865-bd07-a2036562f6ad/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:02:19,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfe6655-d458-4865-bd07-a2036562f6ad/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:02:20,015 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 05:02:20,015 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 05:02:20,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 05:02:20,016 INFO L130 BoogieDeclarations]: Found specification of procedure empty [2023-11-19 05:02:20,016 INFO L138 BoogieDeclarations]: Found implementation of procedure empty [2023-11-19 05:02:20,017 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_lock [2023-11-19 05:02:20,019 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_lock [2023-11-19 05:02:20,019 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 05:02:20,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 05:02:20,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-19 05:02:20,020 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_unlock [2023-11-19 05:02:20,020 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_unlock [2023-11-19 05:02:20,021 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 05:02:20,021 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-19 05:02:20,021 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-19 05:02:20,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 05:02:20,022 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:02:20,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 05:02:20,023 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_create [2023-11-19 05:02:20,024 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_create [2023-11-19 05:02:20,025 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_join [2023-11-19 05:02:20,025 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_join [2023-11-19 05:02:20,025 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~$Pointer$ [2023-11-19 05:02:20,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~$Pointer$ [2023-11-19 05:02:20,026 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_cs [2023-11-19 05:02:20,027 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_cs [2023-11-19 05:02:20,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:02:20,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:02:20,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:02:20,388 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:02:20,391 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:02:20,566 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !(0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296)); [2023-11-19 05:02:20,567 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !(0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296)); [2023-11-19 05:02:20,567 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume 0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296);#res := 0; [2023-11-19 05:02:20,567 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##9: assume 0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296);#res := 0; [2023-11-19 05:02:21,354 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint L1093: SUMMARY for call __CS_cs(); srcloc: null [2023-11-19 05:02:21,354 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint L1093-1: assume 0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296);t2_#res#1.base, t2_#res#1.offset := 0, 0; [2023-11-19 05:02:21,354 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint L1093-1: assume !(0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296)); [2023-11-19 05:02:21,354 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint L1129: SUMMARY for call __CS_cs(); srcloc: null [2023-11-19 05:02:21,355 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint L1129-1: assume 0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296);main_thread_#res#1.base, main_thread_#res#1.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset);havoc main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset);havoc main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset; [2023-11-19 05:02:21,355 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint L1129-1: assume !(0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296)); [2023-11-19 05:02:21,355 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume 0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296);t2_#res#1.base, t2_#res#1.offset := 0, 0; [2023-11-19 05:02:21,355 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !(0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296)); [2023-11-19 05:02:21,355 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##83: assume !(0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296)); [2023-11-19 05:02:21,356 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##82: assume 0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296);dequeue_#res#1 := 0; [2023-11-19 05:02:21,356 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##89: assume !(0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296)); [2023-11-19 05:02:21,356 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##88: assume 0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296);t2_#res#1.base, t2_#res#1.offset := 0, 0; [2023-11-19 05:02:21,356 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##26: assume !(0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296)); [2023-11-19 05:02:21,356 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##25: assume 0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296);main_thread_#res#1.base, main_thread_#res#1.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset);havoc main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset);havoc main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset; [2023-11-19 05:02:21,357 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !(0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296)); [2023-11-19 05:02:21,357 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume 0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296);main_thread_#res#1.base, main_thread_#res#1.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset);havoc main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset);havoc main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset; [2023-11-19 05:02:21,357 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##149: assume 0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296);enqueue_#res#1 := 0; [2023-11-19 05:02:21,357 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##150: assume !(0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296)); [2023-11-19 05:02:21,357 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##166: assume 0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296);t1_#res#1.base, t1_#res#1.offset := 0, 0; [2023-11-19 05:02:21,357 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##167: assume !(0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296)); [2023-11-19 05:02:21,358 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##109: assume 0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296);t2_#res#1.base, t2_#res#1.offset := 0, 0; [2023-11-19 05:02:21,358 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##110: assume !(0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296)); [2023-11-19 05:02:26,509 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:02:26,845 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:02:26,845 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-19 05:02:26,856 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:02:26 BoogieIcfgContainer [2023-11-19 05:02:26,856 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:02:26,859 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:02:26,859 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:02:26,864 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:02:26,864 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:02:18" (1/3) ... [2023-11-19 05:02:26,865 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a6e7490 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:02:26, skipping insertion in model container [2023-11-19 05:02:26,865 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:02:19" (2/3) ... [2023-11-19 05:02:26,866 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a6e7490 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:02:26, skipping insertion in model container [2023-11-19 05:02:26,866 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:02:26" (3/3) ... [2023-11-19 05:02:26,868 INFO L112 eAbstractionObserver]: Analyzing ICFG cs_queue-1.i [2023-11-19 05:02:26,892 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:02:26,892 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:02:26,968 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:02:26,977 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;@46116498, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:02:26,977 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:02:26,986 INFO L276 IsEmpty]: Start isEmpty. Operand has 316 states, 173 states have (on average 1.416184971098266) internal successors, (245), 175 states have internal predecessors, (245), 132 states have call successors, (132), 9 states have call predecessors, (132), 9 states have return successors, (132), 132 states have call predecessors, (132), 132 states have call successors, (132) [2023-11-19 05:02:27,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2023-11-19 05:02:27,058 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:02:27,059 INFO L195 NwaCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:02:27,060 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:02:27,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:02:27,068 INFO L85 PathProgramCache]: Analyzing trace with hash 590775463, now seen corresponding path program 1 times [2023-11-19 05:02:27,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:02:27,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908225347] [2023-11-19 05:02:27,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:02:27,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:02:29,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:02:30,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2652 trivial. 0 not checked. [2023-11-19 05:02:30,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:02:30,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908225347] [2023-11-19 05:02:30,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908225347] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:02:30,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:02:30,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:02:30,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632570610] [2023-11-19 05:02:30,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:02:30,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:02:30,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:02:30,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:02:30,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:02:30,533 INFO L87 Difference]: Start difference. First operand has 316 states, 173 states have (on average 1.416184971098266) internal successors, (245), 175 states have internal predecessors, (245), 132 states have call successors, (132), 9 states have call predecessors, (132), 9 states have return successors, (132), 132 states have call predecessors, (132), 132 states have call successors, (132) Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 1 states have call successors, (53), 2 states have call predecessors, (53), 1 states have return successors, (52), 1 states have call predecessors, (52), 1 states have call successors, (52) [2023-11-19 05:02:32,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:02:34,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:02:35,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:02:35,197 INFO L93 Difference]: Finished difference Result 629 states and 1024 transitions. [2023-11-19 05:02:35,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:02:35,201 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 1 states have call successors, (53), 2 states have call predecessors, (53), 1 states have return successors, (52), 1 states have call predecessors, (52), 1 states have call successors, (52) Word has length 220 [2023-11-19 05:02:35,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:02:35,220 INFO L225 Difference]: With dead ends: 629 [2023-11-19 05:02:35,220 INFO L226 Difference]: Without dead ends: 316 [2023-11-19 05:02:35,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:02:35,233 INFO L413 NwaCegarLoop]: 470 mSDtfsCounter, 6 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:02:35,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 940 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2023-11-19 05:02:35,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2023-11-19 05:02:35,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 313. [2023-11-19 05:02:35,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 172 states have (on average 1.4069767441860466) internal successors, (242), 174 states have internal predecessors, (242), 131 states have call successors, (131), 9 states have call predecessors, (131), 9 states have return successors, (130), 130 states have call predecessors, (130), 130 states have call successors, (130) [2023-11-19 05:02:35,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 503 transitions. [2023-11-19 05:02:35,363 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 503 transitions. Word has length 220 [2023-11-19 05:02:35,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:02:35,363 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 503 transitions. [2023-11-19 05:02:35,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 1 states have call successors, (53), 2 states have call predecessors, (53), 1 states have return successors, (52), 1 states have call predecessors, (52), 1 states have call successors, (52) [2023-11-19 05:02:35,365 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 503 transitions. [2023-11-19 05:02:35,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2023-11-19 05:02:35,377 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:02:35,378 INFO L195 NwaCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:02:35,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:02:35,379 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:02:35,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:02:35,380 INFO L85 PathProgramCache]: Analyzing trace with hash 652110629, now seen corresponding path program 1 times [2023-11-19 05:02:35,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:02:35,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891004704] [2023-11-19 05:02:35,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:02:35,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:02:37,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:02:37,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2653 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2652 trivial. 0 not checked. [2023-11-19 05:02:37,584 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:02:37,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891004704] [2023-11-19 05:02:37,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891004704] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:02:37,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:02:37,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:02:37,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446883486] [2023-11-19 05:02:37,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:02:37,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:02:37,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:02:37,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:02:37,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:02:37,597 INFO L87 Difference]: Start difference. First operand 313 states and 503 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 1 states have call successors, (53), 2 states have call predecessors, (53), 1 states have return successors, (52), 1 states have call predecessors, (52), 1 states have call successors, (52) [2023-11-19 05:02:39,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:02:41,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:02:42,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:02:42,134 INFO L93 Difference]: Finished difference Result 627 states and 1010 transitions. [2023-11-19 05:02:42,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:02:42,135 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 1 states have call successors, (53), 2 states have call predecessors, (53), 1 states have return successors, (52), 1 states have call predecessors, (52), 1 states have call successors, (52) Word has length 224 [2023-11-19 05:02:42,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:02:42,142 INFO L225 Difference]: With dead ends: 627 [2023-11-19 05:02:42,143 INFO L226 Difference]: Without dead ends: 316 [2023-11-19 05:02:42,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:02:42,147 INFO L413 NwaCegarLoop]: 470 mSDtfsCounter, 0 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 939 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:02:42,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 939 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2023-11-19 05:02:42,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2023-11-19 05:02:42,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 316. [2023-11-19 05:02:42,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 175 states have (on average 1.4) internal successors, (245), 177 states have internal predecessors, (245), 131 states have call successors, (131), 9 states have call predecessors, (131), 9 states have return successors, (130), 130 states have call predecessors, (130), 130 states have call successors, (130) [2023-11-19 05:02:42,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 506 transitions. [2023-11-19 05:02:42,220 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 506 transitions. Word has length 224 [2023-11-19 05:02:42,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:02:42,223 INFO L495 AbstractCegarLoop]: Abstraction has 316 states and 506 transitions. [2023-11-19 05:02:42,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 1 states have call successors, (53), 2 states have call predecessors, (53), 1 states have return successors, (52), 1 states have call predecessors, (52), 1 states have call successors, (52) [2023-11-19 05:02:42,224 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 506 transitions. [2023-11-19 05:02:42,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2023-11-19 05:02:42,231 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:02:42,232 INFO L195 NwaCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:02:42,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:02:42,232 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:02:42,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:02:42,243 INFO L85 PathProgramCache]: Analyzing trace with hash 968182381, now seen corresponding path program 1 times [2023-11-19 05:02:42,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:02:42,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259752751] [2023-11-19 05:02:42,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:02:42,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:02:44,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:02:45,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2656 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2654 trivial. 0 not checked. [2023-11-19 05:02:45,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:02:45,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259752751] [2023-11-19 05:02:45,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259752751] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:02:45,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456334674] [2023-11-19 05:02:45,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:02:45,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:02:45,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfe6655-d458-4865-bd07-a2036562f6ad/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:02:45,152 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfe6655-d458-4865-bd07-a2036562f6ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:02:45,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfe6655-d458-4865-bd07-a2036562f6ad/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:02:48,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:02:48,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 1726 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:02:48,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:02:48,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2656 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2654 trivial. 0 not checked. [2023-11-19 05:02:48,835 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:02:49,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2656 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2654 trivial. 0 not checked. [2023-11-19 05:02:49,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456334674] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:02:49,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1902208403] [2023-11-19 05:02:49,132 INFO L159 IcfgInterpreter]: Started Sifa with 122 locations of interest [2023-11-19 05:02:49,132 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:02:49,138 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:02:49,144 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:02:49,144 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:03:04,342 INFO L180 IcfgInterpreter]: Interpretation finished