./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_init4_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_7d2285a0-f57d-4561-8fc2-7853e05d306b/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d2285a0-f57d-4561-8fc2-7853e05d306b/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d2285a0-f57d-4561-8fc2-7853e05d306b/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d2285a0-f57d-4561-8fc2-7853e05d306b/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_init4_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d2285a0-f57d-4561-8fc2-7853e05d306b/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d2285a0-f57d-4561-8fc2-7853e05d306b/bin/utaipan-verify-DbMuA5NWw2 --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 7de2214854a04c901d9978fa289dade6eeec8633c1136ab59a064791b6d02f7f --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:27:41,663 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:27:41,771 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d2285a0-f57d-4561-8fc2-7853e05d306b/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:27:41,778 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:27:41,779 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:27:41,827 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:27:41,828 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:27:41,829 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:27:41,830 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:27:41,830 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:27:41,830 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:27:41,832 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:27:41,832 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:27:41,834 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:27:41,836 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:27:41,837 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:27:41,838 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:27:41,838 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:27:41,838 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:27:41,839 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:27:41,839 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:27:41,844 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:27:41,845 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:27:41,845 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:27:41,846 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:27:41,846 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:27:41,846 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:27:41,847 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:27:41,847 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:27:41,847 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:27:41,849 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:27:41,850 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:27:41,851 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:27:41,851 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:27:41,852 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:27:41,852 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:27:41,852 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:27:41,853 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:27:41,853 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:27:41,853 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:27:41,854 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:27:41,854 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:27:41,855 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:27:41,855 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:27:41,856 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:27:41,856 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:27:41,856 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:27:41,856 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_7d2285a0-f57d-4561-8fc2-7853e05d306b/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d2285a0-f57d-4561-8fc2-7853e05d306b/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7de2214854a04c901d9978fa289dade6eeec8633c1136ab59a064791b6d02f7f [2024-11-02 12:27:42,191 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:27:42,222 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:27:42,225 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:27:42,227 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:27:42,227 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:27:42,229 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d2285a0-f57d-4561-8fc2-7853e05d306b/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/array-examples/standard_init4_ground-2.i Unable to find full path for "g++" [2024-11-02 12:27:44,243 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:27:44,538 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:27:44,539 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d2285a0-f57d-4561-8fc2-7853e05d306b/sv-benchmarks/c/array-examples/standard_init4_ground-2.i [2024-11-02 12:27:44,550 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d2285a0-f57d-4561-8fc2-7853e05d306b/bin/utaipan-verify-DbMuA5NWw2/data/aca47275b/2b0f22d284634eae8f32c4081bf3b3a0/FLAG1367dafb4 [2024-11-02 12:27:44,854 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d2285a0-f57d-4561-8fc2-7853e05d306b/bin/utaipan-verify-DbMuA5NWw2/data/aca47275b/2b0f22d284634eae8f32c4081bf3b3a0 [2024-11-02 12:27:44,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:27:44,858 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:27:44,859 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:27:44,859 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:27:44,877 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:27:44,878 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:27:44" (1/1) ... [2024-11-02 12:27:44,884 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@221e57b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:44, skipping insertion in model container [2024-11-02 12:27:44,884 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:27:44" (1/1) ... [2024-11-02 12:27:44,913 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:27:45,208 WARN L251 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_7d2285a0-f57d-4561-8fc2-7853e05d306b/sv-benchmarks/c/array-examples/standard_init4_ground-2.i[816,829] [2024-11-02 12:27:45,254 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:27:45,271 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:27:45,290 WARN L251 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_7d2285a0-f57d-4561-8fc2-7853e05d306b/sv-benchmarks/c/array-examples/standard_init4_ground-2.i[816,829] [2024-11-02 12:27:45,312 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:27:45,343 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:27:45,343 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:45 WrapperNode [2024-11-02 12:27:45,343 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:27:45,345 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:27:45,345 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:27:45,345 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:27:45,354 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:45" (1/1) ... [2024-11-02 12:27:45,363 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:45" (1/1) ... [2024-11-02 12:27:45,387 INFO L138 Inliner]: procedures = 15, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 60 [2024-11-02 12:27:45,389 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:27:45,390 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:27:45,390 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:27:45,390 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:27:45,401 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:45" (1/1) ... [2024-11-02 12:27:45,401 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:45" (1/1) ... [2024-11-02 12:27:45,407 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:45" (1/1) ... [2024-11-02 12:27:45,407 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:45" (1/1) ... [2024-11-02 12:27:45,412 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:45" (1/1) ... [2024-11-02 12:27:45,425 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:45" (1/1) ... [2024-11-02 12:27:45,426 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:45" (1/1) ... [2024-11-02 12:27:45,427 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:45" (1/1) ... [2024-11-02 12:27:45,433 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:27:45,434 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:27:45,434 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:27:45,434 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:27:45,435 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:45" (1/1) ... [2024-11-02 12:27:45,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:27:45,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d2285a0-f57d-4561-8fc2-7853e05d306b/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:27:45,489 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d2285a0-f57d-4561-8fc2-7853e05d306b/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:27:45,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d2285a0-f57d-4561-8fc2-7853e05d306b/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:27:45,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:27:45,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:27:45,533 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-02 12:27:45,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-02 12:27:45,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:27:45,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:27:45,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-02 12:27:45,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-02 12:27:45,619 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:27:45,622 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:27:45,822 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-02 12:27:45,823 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:27:45,903 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:27:45,903 INFO L316 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-02 12:27:45,911 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:27:45 BoogieIcfgContainer [2024-11-02 12:27:45,911 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:27:45,919 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:27:45,919 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:27:45,928 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:27:45,929 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:27:44" (1/3) ... [2024-11-02 12:27:45,930 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20f49e6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:27:45, skipping insertion in model container [2024-11-02 12:27:45,930 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:45" (2/3) ... [2024-11-02 12:27:45,934 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20f49e6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:27:45, skipping insertion in model container [2024-11-02 12:27:45,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:27:45" (3/3) ... [2024-11-02 12:27:45,938 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_init4_ground-2.i [2024-11-02 12:27:45,981 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:27:45,982 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 12:27:46,101 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:27:46,109 INFO L333 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, 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;@2a8eb1cd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:27:46,109 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 12:27:46,114 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:46,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-02 12:27:46,122 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:27:46,123 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:27:46,123 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:27:46,129 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:27:46,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1248230578, now seen corresponding path program 1 times [2024-11-02 12:27:46,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:27:46,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728150174] [2024-11-02 12:27:46,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:46,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:27:46,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:46,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:27:46,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:27:46,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728150174] [2024-11-02 12:27:46,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728150174] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:27:46,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:27:46,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:27:46,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254566334] [2024-11-02 12:27:46,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:27:46,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:27:46,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:27:46,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:27:46,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:27:46,417 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:46,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:27:46,494 INFO L93 Difference]: Finished difference Result 24 states and 37 transitions. [2024-11-02 12:27:46,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:27:46,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-02 12:27:46,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:27:46,508 INFO L225 Difference]: With dead ends: 24 [2024-11-02 12:27:46,508 INFO L226 Difference]: Without dead ends: 14 [2024-11-02 12:27:46,511 INFO L431 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 [2024-11-02 12:27:46,515 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:27:46,516 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:27:46,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-11-02 12:27:46,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-11-02 12:27:46,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 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) [2024-11-02 12:27:46,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2024-11-02 12:27:46,555 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 8 [2024-11-02 12:27:46,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:27:46,555 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2024-11-02 12:27:46,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:46,556 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2024-11-02 12:27:46,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-02 12:27:46,556 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:27:46,557 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:27:46,557 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:27:46,557 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:27:46,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:27:46,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1376033988, now seen corresponding path program 1 times [2024-11-02 12:27:46,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:27:46,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945225450] [2024-11-02 12:27:46,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:46,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:27:46,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:46,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-02 12:27:46,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:27:46,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945225450] [2024-11-02 12:27:46,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945225450] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:27:46,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100684733] [2024-11-02 12:27:46,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:46,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:27:46,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d2285a0-f57d-4561-8fc2-7853e05d306b/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:27:46,695 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d2285a0-f57d-4561-8fc2-7853e05d306b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:27:46,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d2285a0-f57d-4561-8fc2-7853e05d306b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:27:46,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:46,772 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-02 12:27:46,777 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:27:46,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-02 12:27:46,821 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:27:46,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-02 12:27:46,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100684733] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:27:46,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1424203822] [2024-11-02 12:27:46,872 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-02 12:27:46,872 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:27:46,876 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:27:46,881 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:27:46,882 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:27:47,384 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:27:47,491 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '152#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0) 45)))' at error location [2024-11-02 12:27:47,491 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:27:47,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:27:47,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-02 12:27:47,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013126157] [2024-11-02 12:27:47,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:27:47,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-02 12:27:47,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:27:47,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-02 12:27:47,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-02 12:27:47,497 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:47,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:27:47,595 INFO L93 Difference]: Finished difference Result 37 states and 56 transitions. [2024-11-02 12:27:47,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 12:27:47,596 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-02 12:27:47,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:27:47,597 INFO L225 Difference]: With dead ends: 37 [2024-11-02 12:27:47,597 INFO L226 Difference]: Without dead ends: 26 [2024-11-02 12:27:47,598 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-02 12:27:47,599 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:27:47,600 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:27:47,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-02 12:27:47,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-02 12:27:47,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:47,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-11-02 12:27:47,609 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 12 [2024-11-02 12:27:47,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:27:47,610 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-11-02 12:27:47,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:47,610 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-11-02 12:27:47,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-02 12:27:47,611 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:27:47,611 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:27:47,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d2285a0-f57d-4561-8fc2-7853e05d306b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-02 12:27:47,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d2285a0-f57d-4561-8fc2-7853e05d306b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:27:47,813 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:27:47,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:27:47,814 INFO L85 PathProgramCache]: Analyzing trace with hash 849014578, now seen corresponding path program 2 times [2024-11-02 12:27:47,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:27:47,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323915117] [2024-11-02 12:27:47,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:47,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:27:47,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:48,098 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-02 12:27:48,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:27:48,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323915117] [2024-11-02 12:27:48,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323915117] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:27:48,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886254312] [2024-11-02 12:27:48,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:27:48,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:27:48,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d2285a0-f57d-4561-8fc2-7853e05d306b/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:27:48,103 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d2285a0-f57d-4561-8fc2-7853e05d306b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:27:48,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d2285a0-f57d-4561-8fc2-7853e05d306b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:27:48,254 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-02 12:27:48,254 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:27:48,256 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-02 12:27:48,257 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:27:48,290 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-02 12:27:48,292 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:27:48,387 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-02 12:27:48,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886254312] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:27:48,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1270126900] [2024-11-02 12:27:48,394 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-02 12:27:48,394 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:27:48,395 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:27:48,395 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:27:48,395 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:27:48,654 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:27:48,821 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '419#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0) 45)))' at error location [2024-11-02 12:27:48,822 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:27:48,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:27:48,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2024-11-02 12:27:48,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131183366] [2024-11-02 12:27:48,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:27:48,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-02 12:27:48,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:27:48,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-02 12:27:48,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2024-11-02 12:27:48,829 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 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) [2024-11-02 12:27:49,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:27:49,023 INFO L93 Difference]: Finished difference Result 70 states and 101 transitions. [2024-11-02 12:27:49,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-02 12:27:49,024 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 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 24 [2024-11-02 12:27:49,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:27:49,025 INFO L225 Difference]: With dead ends: 70 [2024-11-02 12:27:49,026 INFO L226 Difference]: Without dead ends: 50 [2024-11-02 12:27:49,027 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2024-11-02 12:27:49,030 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:27:49,031 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:27:49,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-02 12:27:49,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-11-02 12:27:49,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 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) [2024-11-02 12:27:49,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2024-11-02 12:27:49,050 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 24 [2024-11-02 12:27:49,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:27:49,051 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2024-11-02 12:27:49,052 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 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) [2024-11-02 12:27:49,052 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2024-11-02 12:27:49,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-02 12:27:49,054 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:27:49,054 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:27:49,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d2285a0-f57d-4561-8fc2-7853e05d306b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-02 12:27:49,255 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d2285a0-f57d-4561-8fc2-7853e05d306b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-02 12:27:49,255 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:27:49,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:27:49,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1655960306, now seen corresponding path program 3 times [2024-11-02 12:27:49,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:27:49,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35337278] [2024-11-02 12:27:49,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:49,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:27:49,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:49,848 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2024-11-02 12:27:49,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:27:49,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35337278] [2024-11-02 12:27:49,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35337278] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:27:49,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963465844] [2024-11-02 12:27:49,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-02 12:27:49,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:27:49,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d2285a0-f57d-4561-8fc2-7853e05d306b/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:27:49,852 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d2285a0-f57d-4561-8fc2-7853e05d306b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:27:49,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d2285a0-f57d-4561-8fc2-7853e05d306b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 12:27:50,014 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-02 12:27:50,015 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:27:50,017 INFO L255 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-02 12:27:50,021 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:27:50,073 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2024-11-02 12:27:50,074 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:27:50,408 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2024-11-02 12:27:50,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963465844] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:27:50,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1996267122] [2024-11-02 12:27:50,414 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-02 12:27:50,415 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:27:50,416 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:27:50,416 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:27:50,417 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:27:50,629 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:27:50,756 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '956#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0) 45)))' at error location [2024-11-02 12:27:50,757 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:27:50,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:27:50,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2024-11-02 12:27:50,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187754656] [2024-11-02 12:27:50,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:27:50,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-02 12:27:50,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:27:50,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-02 12:27:50,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=502, Unknown=0, NotChecked=0, Total=812 [2024-11-02 12:27:50,762 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:51,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:27:51,181 INFO L93 Difference]: Finished difference Result 136 states and 191 transitions. [2024-11-02 12:27:51,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-02 12:27:51,182 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2024-11-02 12:27:51,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:27:51,183 INFO L225 Difference]: With dead ends: 136 [2024-11-02 12:27:51,183 INFO L226 Difference]: Without dead ends: 98 [2024-11-02 12:27:51,184 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=310, Invalid=502, Unknown=0, NotChecked=0, Total=812 [2024-11-02 12:27:51,185 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-02 12:27:51,186 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-02 12:27:51,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-02 12:27:51,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2024-11-02 12:27:51,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.0515463917525774) internal successors, (102), 97 states have internal predecessors, (102), 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) [2024-11-02 12:27:51,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2024-11-02 12:27:51,206 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 48 [2024-11-02 12:27:51,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:27:51,208 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2024-11-02 12:27:51,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:51,209 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2024-11-02 12:27:51,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-02 12:27:51,213 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:27:51,213 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:27:51,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d2285a0-f57d-4561-8fc2-7853e05d306b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-02 12:27:51,414 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d2285a0-f57d-4561-8fc2-7853e05d306b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:27:51,414 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:27:51,415 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:27:51,415 INFO L85 PathProgramCache]: Analyzing trace with hash 2043046514, now seen corresponding path program 4 times [2024-11-02 12:27:51,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:27:51,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282251587] [2024-11-02 12:27:51,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:51,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:27:51,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:52,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2024-11-02 12:27:52,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:27:52,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282251587] [2024-11-02 12:27:52,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282251587] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:27:52,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825218575] [2024-11-02 12:27:52,691 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-02 12:27:52,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:27:52,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d2285a0-f57d-4561-8fc2-7853e05d306b/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:27:52,694 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d2285a0-f57d-4561-8fc2-7853e05d306b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:27:52,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d2285a0-f57d-4561-8fc2-7853e05d306b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 12:27:52,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:52,922 INFO L255 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-02 12:27:52,926 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:27:52,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2024-11-02 12:27:52,990 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:27:53,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2024-11-02 12:27:53,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825218575] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:27:53,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1865742180] [2024-11-02 12:27:54,001 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-02 12:27:54,002 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:27:54,002 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:27:54,002 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:27:54,002 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:27:54,172 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:27:54,314 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2033#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0) 45)))' at error location [2024-11-02 12:27:54,315 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:27:54,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:27:54,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2024-11-02 12:27:54,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401171925] [2024-11-02 12:27:54,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:27:54,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-02 12:27:54,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:27:54,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-02 12:27:54,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1186, Invalid=1570, Unknown=0, NotChecked=0, Total=2756 [2024-11-02 12:27:54,319 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand has 49 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 48 states have internal predecessors, (59), 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) [2024-11-02 12:27:55,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:27:55,277 INFO L93 Difference]: Finished difference Result 268 states and 371 transitions. [2024-11-02 12:27:55,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-02 12:27:55,278 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 48 states have internal predecessors, (59), 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 96 [2024-11-02 12:27:55,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:27:55,279 INFO L225 Difference]: With dead ends: 268 [2024-11-02 12:27:55,280 INFO L226 Difference]: Without dead ends: 194 [2024-11-02 12:27:55,281 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1186, Invalid=1570, Unknown=0, NotChecked=0, Total=2756 [2024-11-02 12:27:55,282 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-02 12:27:55,283 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-02 12:27:55,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2024-11-02 12:27:55,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2024-11-02 12:27:55,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.0259067357512954) internal successors, (198), 193 states have internal predecessors, (198), 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) [2024-11-02 12:27:55,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2024-11-02 12:27:55,310 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 96 [2024-11-02 12:27:55,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:27:55,310 INFO L471 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2024-11-02 12:27:55,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 48 states have internal predecessors, (59), 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) [2024-11-02 12:27:55,311 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2024-11-02 12:27:55,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2024-11-02 12:27:55,317 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:27:55,317 INFO L215 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:27:55,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d2285a0-f57d-4561-8fc2-7853e05d306b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-02 12:27:55,518 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d2285a0-f57d-4561-8fc2-7853e05d306b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:27:55,521 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:27:55,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:27:55,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1347230066, now seen corresponding path program 5 times [2024-11-02 12:27:55,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:27:55,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315726046] [2024-11-02 12:27:55,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:55,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:27:55,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:59,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 3243 trivial. 0 not checked. [2024-11-02 12:27:59,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:27:59,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315726046] [2024-11-02 12:27:59,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315726046] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:27:59,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068744938] [2024-11-02 12:27:59,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:27:59,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:27:59,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d2285a0-f57d-4561-8fc2-7853e05d306b/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:27:59,539 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d2285a0-f57d-4561-8fc2-7853e05d306b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:27:59,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d2285a0-f57d-4561-8fc2-7853e05d306b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process