./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-pthread/cs_stateful-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_bfc9bd05-3892-477b-b9b6-d30588fcf17b/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfc9bd05-3892-477b-b9b6-d30588fcf17b/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfc9bd05-3892-477b-b9b6-d30588fcf17b/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfc9bd05-3892-477b-b9b6-d30588fcf17b/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-pthread/cs_stateful-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfc9bd05-3892-477b-b9b6-d30588fcf17b/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfc9bd05-3892-477b-b9b6-d30588fcf17b/bin/utaipan-verify-NcY6lQBIFX --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 8ecae2ca1de1e5b446d807037ed0cb2d4fc04c355acb35a6870f18f7e175f10e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:46:49,684 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:46:49,790 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfc9bd05-3892-477b-b9b6-d30588fcf17b/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:46:49,799 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:46:49,801 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:46:49,841 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:46:49,842 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:46:49,843 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:46:49,844 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:46:49,849 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:46:49,849 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:46:49,850 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:46:49,851 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:46:49,852 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:46:49,853 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:46:49,853 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:46:49,854 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:46:49,854 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:46:49,855 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:46:49,855 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:46:49,856 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:46:49,856 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:46:49,857 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:46:49,858 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:46:49,858 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:46:49,859 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:46:49,859 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:46:49,860 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:46:49,860 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:46:49,860 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:46:49,862 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:46:49,862 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:46:49,862 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:46:49,863 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:46:49,863 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:46:49,863 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:46:49,864 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:46:49,864 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:46:49,864 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:46:49,865 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:46:49,865 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:46:49,865 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:46:49,865 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:46:49,866 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:46:49,867 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:46:49,867 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_bfc9bd05-3892-477b-b9b6-d30588fcf17b/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfc9bd05-3892-477b-b9b6-d30588fcf17b/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8ecae2ca1de1e5b446d807037ed0cb2d4fc04c355acb35a6870f18f7e175f10e [2023-11-12 00:46:50,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:46:50,195 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:46:50,198 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:46:50,199 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:46:50,200 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:46:50,202 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfc9bd05-3892-477b-b9b6-d30588fcf17b/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/seq-pthread/cs_stateful-1.i [2023-11-12 00:46:53,298 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:46:53,581 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:46:53,581 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfc9bd05-3892-477b-b9b6-d30588fcf17b/sv-benchmarks/c/seq-pthread/cs_stateful-1.i [2023-11-12 00:46:53,603 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfc9bd05-3892-477b-b9b6-d30588fcf17b/bin/utaipan-verify-NcY6lQBIFX/data/ff2d1b4fd/f9cab1e44dcb45bd8705c6199e3fcee9/FLAG309ddfdfb [2023-11-12 00:46:53,617 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfc9bd05-3892-477b-b9b6-d30588fcf17b/bin/utaipan-verify-NcY6lQBIFX/data/ff2d1b4fd/f9cab1e44dcb45bd8705c6199e3fcee9 [2023-11-12 00:46:53,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:46:53,622 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:46:53,623 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:46:53,624 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:46:53,629 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:46:53,630 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:46:53" (1/1) ... [2023-11-12 00:46:53,632 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@166733d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:53, skipping insertion in model container [2023-11-12 00:46:53,632 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:46:53" (1/1) ... [2023-11-12 00:46:53,689 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:46:54,092 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_bfc9bd05-3892-477b-b9b6-d30588fcf17b/sv-benchmarks/c/seq-pthread/cs_stateful-1.i[23400,23413] [2023-11-12 00:46:54,228 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:46:54,259 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:46:54,302 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_bfc9bd05-3892-477b-b9b6-d30588fcf17b/sv-benchmarks/c/seq-pthread/cs_stateful-1.i[23400,23413] [2023-11-12 00:46:54,368 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:46:54,429 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:46:54,430 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:54 WrapperNode [2023-11-12 00:46:54,430 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:46:54,431 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:46:54,431 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:46:54,432 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:46:54,439 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:54" (1/1) ... [2023-11-12 00:46:54,464 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:54" (1/1) ... [2023-11-12 00:46:54,522 INFO L138 Inliner]: procedures = 144, calls = 231, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 570 [2023-11-12 00:46:54,522 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:46:54,523 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:46:54,523 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:46:54,523 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:46:54,534 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:54" (1/1) ... [2023-11-12 00:46:54,534 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:54" (1/1) ... [2023-11-12 00:46:54,557 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:54" (1/1) ... [2023-11-12 00:46:54,557 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:54" (1/1) ... [2023-11-12 00:46:54,628 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:54" (1/1) ... [2023-11-12 00:46:54,634 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:54" (1/1) ... [2023-11-12 00:46:54,639 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:54" (1/1) ... [2023-11-12 00:46:54,655 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:54" (1/1) ... [2023-11-12 00:46:54,663 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:46:54,664 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:46:54,664 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:46:54,664 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:46:54,665 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:54" (1/1) ... [2023-11-12 00:46:54,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:46:54,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfc9bd05-3892-477b-b9b6-d30588fcf17b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:54,707 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfc9bd05-3892-477b-b9b6-d30588fcf17b/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:46:54,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfc9bd05-3892-477b-b9b6-d30588fcf17b/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:46:54,753 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:46:54,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:46:54,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:46:54,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:46:54,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 00:46:54,754 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_init [2023-11-12 00:46:54,756 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_init [2023-11-12 00:46:54,756 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_lock [2023-11-12 00:46:54,757 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_lock [2023-11-12 00:46:54,757 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_create [2023-11-12 00:46:54,757 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_create [2023-11-12 00:46:54,757 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 00:46:54,757 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_join [2023-11-12 00:46:54,757 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_join [2023-11-12 00:46:54,758 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~$Pointer$ [2023-11-12 00:46:54,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~$Pointer$ [2023-11-12 00:46:54,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:46:54,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 00:46:54,759 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_cs [2023-11-12 00:46:54,759 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_cs [2023-11-12 00:46:54,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:46:54,760 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_unlock [2023-11-12 00:46:54,760 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_unlock [2023-11-12 00:46:54,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:46:54,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:46:54,987 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:46:54,989 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:46:55,422 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint L746: SUMMARY for call __CS_cs(); srcloc: null [2023-11-12 00:46:55,423 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint L746-1: 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_~#t1~0#1.base, main_thread_~#t1~0#1.offset);havoc main_thread_~#t1~0#1.base, main_thread_~#t1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset);havoc main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset; [2023-11-12 00:46:55,423 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint L746-1: assume !(0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296)); [2023-11-12 00:46:55,423 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##31: assume !(0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296)); [2023-11-12 00:46:55,423 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##30: 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_~#t1~0#1.base, main_thread_~#t1~0#1.offset);havoc main_thread_~#t1~0#1.base, main_thread_~#t1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset);havoc main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset; [2023-11-12 00:46:55,424 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##29: assume !(0 != (if ~__CS_ret~0 % 256 % 4294967296 <= 2147483647 then ~__CS_ret~0 % 256 % 4294967296 else ~__CS_ret~0 % 256 % 4294967296 - 4294967296)); [2023-11-12 00:46:55,424 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##28: 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_~#t1~0#1.base, main_thread_~#t1~0#1.offset);havoc main_thread_~#t1~0#1.base, main_thread_~#t1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset);havoc main_thread_~#t2~0#1.base, main_thread_~#t2~0#1.offset; [2023-11-12 00:46:56,808 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:46:57,059 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:46:57,059 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 00:46:57,062 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:46:57 BoogieIcfgContainer [2023-11-12 00:46:57,062 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:46:57,066 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:46:57,066 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:46:57,069 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:46:57,070 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:46:53" (1/3) ... [2023-11-12 00:46:57,071 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@760b1e6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:46:57, skipping insertion in model container [2023-11-12 00:46:57,071 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:54" (2/3) ... [2023-11-12 00:46:57,072 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@760b1e6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:46:57, skipping insertion in model container [2023-11-12 00:46:57,073 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:46:57" (3/3) ... [2023-11-12 00:46:57,074 INFO L112 eAbstractionObserver]: Analyzing ICFG cs_stateful-1.i [2023-11-12 00:46:57,094 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:46:57,095 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:46:57,163 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:46:57,171 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;@2d8fb044, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:46:57,172 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:46:57,177 INFO L276 IsEmpty]: Start isEmpty. Operand has 119 states, 68 states have (on average 1.4558823529411764) internal successors, (99), 69 states have internal predecessors, (99), 42 states have call successors, (42), 7 states have call predecessors, (42), 7 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-12 00:46:57,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-12 00:46:57,187 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:57,188 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:46:57,188 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:57,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:57,193 INFO L85 PathProgramCache]: Analyzing trace with hash -901858488, now seen corresponding path program 1 times [2023-11-12 00:46:57,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:57,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525131239] [2023-11-12 00:46:57,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:57,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:57,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:46:57,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:57,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525131239] [2023-11-12 00:46:57,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525131239] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:46:57,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:46:57,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:46:57,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367275207] [2023-11-12 00:46:57,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:46:57,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:46:57,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:57,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:46:57,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:46:57,859 INFO L87 Difference]: Start difference. First operand has 119 states, 68 states have (on average 1.4558823529411764) internal successors, (99), 69 states have internal predecessors, (99), 42 states have call successors, (42), 7 states have call predecessors, (42), 7 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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) [2023-11-12 00:46:59,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:47:00,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:00,682 INFO L93 Difference]: Finished difference Result 237 states and 365 transitions. [2023-11-12 00:47:00,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:47:00,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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 10 [2023-11-12 00:47:00,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:00,706 INFO L225 Difference]: With dead ends: 237 [2023-11-12 00:47:00,706 INFO L226 Difference]: Without dead ends: 119 [2023-11-12 00:47:00,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:47:00,719 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 2 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:00,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 320 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2023-11-12 00:47:00,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-11-12 00:47:00,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2023-11-12 00:47:00,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 68 states have (on average 1.4264705882352942) internal successors, (97), 68 states have internal predecessors, (97), 42 states have call successors, (42), 7 states have call predecessors, (42), 7 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-12 00:47:00,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 181 transitions. [2023-11-12 00:47:00,827 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 181 transitions. Word has length 10 [2023-11-12 00:47:00,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:00,827 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 181 transitions. [2023-11-12 00:47:00,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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) [2023-11-12 00:47:00,828 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 181 transitions. [2023-11-12 00:47:00,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-12 00:47:00,830 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:00,830 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:47:00,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:47:00,830 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:00,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:00,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1101290890, now seen corresponding path program 1 times [2023-11-12 00:47:00,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:00,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721651289] [2023-11-12 00:47:00,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:00,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:01,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:01,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:47:01,223 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:01,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721651289] [2023-11-12 00:47:01,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721651289] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:47:01,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:47:01,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:47:01,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290361101] [2023-11-12 00:47:01,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:47:01,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:47:01,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:01,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:47:01,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:47:01,227 INFO L87 Difference]: Start difference. First operand 118 states and 181 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2023-11-12 00:47:03,277 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 [] [2023-11-12 00:47:03,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:03,840 INFO L93 Difference]: Finished difference Result 235 states and 362 transitions. [2023-11-12 00:47:03,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:47:03,841 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 12 [2023-11-12 00:47:03,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:03,844 INFO L225 Difference]: With dead ends: 235 [2023-11-12 00:47:03,845 INFO L226 Difference]: Without dead ends: 119 [2023-11-12 00:47:03,847 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 [2023-11-12 00:47:03,849 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 0 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:03,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 319 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2023-11-12 00:47:03,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-11-12 00:47:03,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2023-11-12 00:47:03,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 69 states have (on average 1.4202898550724639) internal successors, (98), 69 states have internal predecessors, (98), 42 states have call successors, (42), 7 states have call predecessors, (42), 7 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-12 00:47:03,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 182 transitions. [2023-11-12 00:47:03,872 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 182 transitions. Word has length 12 [2023-11-12 00:47:03,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:03,872 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 182 transitions. [2023-11-12 00:47:03,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2023-11-12 00:47:03,873 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 182 transitions. [2023-11-12 00:47:03,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-12 00:47:03,874 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:03,874 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:47:03,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:47:03,875 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:03,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:03,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1117525236, now seen corresponding path program 1 times [2023-11-12 00:47:03,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:03,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317373016] [2023-11-12 00:47:03,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:03,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:04,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:04,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:47:04,146 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:04,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317373016] [2023-11-12 00:47:04,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317373016] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:47:04,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654734255] [2023-11-12 00:47:04,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:04,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:04,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfc9bd05-3892-477b-b9b6-d30588fcf17b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:04,155 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfc9bd05-3892-477b-b9b6-d30588fcf17b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:47:04,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfc9bd05-3892-477b-b9b6-d30588fcf17b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:47:04,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:04,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:47:04,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:47:04,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:47:04,577 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:47:04,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:47:04,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654734255] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:47:04,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [95267493] [2023-11-12 00:47:04,617 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-11-12 00:47:04,618 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:47:04,621 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:47:04,627 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:47:04,627 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:47:13,894 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:47:23,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [95267493] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:47:23,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:47:23,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4, 4] total 9 [2023-11-12 00:47:23,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069299433] [2023-11-12 00:47:23,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:47:23,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:47:23,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:23,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:47:23,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=48, Unknown=1, NotChecked=0, Total=72 [2023-11-12 00:47:23,731 INFO L87 Difference]: Start difference. First operand 119 states and 182 transitions. Second operand has 5 states, 5 states have (on average 2.6) 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) [2023-11-12 00:47:25,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:47:27,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:47:28,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:47:30,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:47:32,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:47:33,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:33,407 INFO L93 Difference]: Finished difference Result 230 states and 352 transitions. [2023-11-12 00:47:33,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:47:33,408 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) 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 [2023-11-12 00:47:33,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:33,411 INFO L225 Difference]: With dead ends: 230 [2023-11-12 00:47:33,411 INFO L226 Difference]: Without dead ends: 119 [2023-11-12 00:47:33,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=23, Invalid=48, Unknown=1, NotChecked=0, Total=72 [2023-11-12 00:47:33,416 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 0 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:33,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 453 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 253 Invalid, 1 Unknown, 0 Unchecked, 9.6s Time] [2023-11-12 00:47:33,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-11-12 00:47:33,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2023-11-12 00:47:33,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 69 states have (on average 1.4057971014492754) internal successors, (97), 69 states have internal predecessors, (97), 42 states have call successors, (42), 7 states have call predecessors, (42), 7 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-12 00:47:33,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 181 transitions. [2023-11-12 00:47:33,439 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 181 transitions. Word has length 13 [2023-11-12 00:47:33,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:33,440 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 181 transitions. [2023-11-12 00:47:33,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) 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) [2023-11-12 00:47:33,440 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 181 transitions. [2023-11-12 00:47:33,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-12 00:47:33,442 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:33,442 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:47:33,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfc9bd05-3892-477b-b9b6-d30588fcf17b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:47:33,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfc9bd05-3892-477b-b9b6-d30588fcf17b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-12 00:47:33,649 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:33,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:33,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1211244719, now seen corresponding path program 1 times [2023-11-12 00:47:33,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:33,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965700741] [2023-11-12 00:47:33,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:33,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:33,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:33,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:47:33,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:33,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965700741] [2023-11-12 00:47:33,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965700741] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:47:33,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972011080] [2023-11-12 00:47:33,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:33,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:33,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfc9bd05-3892-477b-b9b6-d30588fcf17b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:33,871 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfc9bd05-3892-477b-b9b6-d30588fcf17b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:47:33,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfc9bd05-3892-477b-b9b6-d30588fcf17b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:47:34,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:34,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:47:34,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:47:34,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:47:34,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:47:34,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:47:34,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972011080] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:47:34,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [147488969] [2023-11-12 00:47:34,281 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-11-12 00:47:34,282 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:47:34,283 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:47:34,284 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:47:34,284 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs