./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/indp3f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d21b67f-089e-4e9c-8e91-3b48780078b6/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d21b67f-089e-4e9c-8e91-3b48780078b6/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d21b67f-089e-4e9c-8e91-3b48780078b6/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d21b67f-089e-4e9c-8e91-3b48780078b6/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/indp3f.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d21b67f-089e-4e9c-8e91-3b48780078b6/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d21b67f-089e-4e9c-8e91-3b48780078b6/bin/utaipan-verify-mE87zJ7Ire --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 e65fcf75bc449caf1adc12b98cf1df32d7807702ccc9a83118e61ee3faf8aa64 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:37:50,495 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:37:50,616 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d21b67f-089e-4e9c-8e91-3b48780078b6/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 20:37:50,624 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:37:50,625 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:37:50,668 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:37:50,668 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:37:50,669 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:37:50,670 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:37:50,675 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:37:50,676 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:37:50,676 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:37:50,677 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:37:50,679 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:37:50,679 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:37:50,680 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:37:50,680 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:37:50,681 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:37:50,681 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:37:50,681 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:37:50,682 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:37:50,683 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:37:50,684 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:37:50,684 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:37:50,685 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:37:50,685 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:37:50,686 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:37:50,686 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:37:50,687 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:37:50,687 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:37:50,688 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:37:50,689 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:37:50,689 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:37:50,689 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:37:50,689 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:37:50,690 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:37:50,690 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:37:50,690 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:37:50,691 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:37:50,691 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:37:50,691 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:37:50,692 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:37:50,692 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:37:50,692 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:37:50,693 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:37:50,693 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:37:50,693 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:37:50,693 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_7d21b67f-089e-4e9c-8e91-3b48780078b6/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d21b67f-089e-4e9c-8e91-3b48780078b6/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e65fcf75bc449caf1adc12b98cf1df32d7807702ccc9a83118e61ee3faf8aa64 [2023-11-23 20:37:51,000 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:37:51,034 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:37:51,037 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:37:51,040 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:37:51,040 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:37:51,042 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d21b67f-089e-4e9c-8e91-3b48780078b6/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/array-fpi/indp3f.c [2023-11-23 20:37:54,188 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:37:54,552 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:37:54,553 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d21b67f-089e-4e9c-8e91-3b48780078b6/sv-benchmarks/c/array-fpi/indp3f.c [2023-11-23 20:37:54,563 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d21b67f-089e-4e9c-8e91-3b48780078b6/bin/utaipan-verify-mE87zJ7Ire/data/e8bbc9fa0/0dcde092495345dca022cffe8788230e/FLAG12988c176 [2023-11-23 20:37:54,585 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d21b67f-089e-4e9c-8e91-3b48780078b6/bin/utaipan-verify-mE87zJ7Ire/data/e8bbc9fa0/0dcde092495345dca022cffe8788230e [2023-11-23 20:37:54,594 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:37:54,598 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:37:54,604 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:37:54,605 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:37:54,611 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:37:54,613 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:37:54" (1/1) ... [2023-11-23 20:37:54,614 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d15735d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:54, skipping insertion in model container [2023-11-23 20:37:54,614 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:37:54" (1/1) ... [2023-11-23 20:37:54,645 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:37:54,867 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_7d21b67f-089e-4e9c-8e91-3b48780078b6/sv-benchmarks/c/array-fpi/indp3f.c[589,602] [2023-11-23 20:37:54,901 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:37:54,923 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:37:54,937 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_7d21b67f-089e-4e9c-8e91-3b48780078b6/sv-benchmarks/c/array-fpi/indp3f.c[589,602] [2023-11-23 20:37:54,947 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:37:54,968 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:37:54,968 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:54 WrapperNode [2023-11-23 20:37:54,969 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:37:54,970 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:37:54,971 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:37:54,971 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:37:54,981 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:54" (1/1) ... [2023-11-23 20:37:55,004 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:54" (1/1) ... [2023-11-23 20:37:55,034 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 85 [2023-11-23 20:37:55,034 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:37:55,036 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:37:55,036 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:37:55,036 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:37:55,049 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:54" (1/1) ... [2023-11-23 20:37:55,050 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:54" (1/1) ... [2023-11-23 20:37:55,055 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:54" (1/1) ... [2023-11-23 20:37:55,056 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:54" (1/1) ... [2023-11-23 20:37:55,070 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:54" (1/1) ... [2023-11-23 20:37:55,082 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:54" (1/1) ... [2023-11-23 20:37:55,084 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:54" (1/1) ... [2023-11-23 20:37:55,085 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:54" (1/1) ... [2023-11-23 20:37:55,088 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:37:55,089 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:37:55,090 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:37:55,090 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:37:55,091 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:54" (1/1) ... [2023-11-23 20:37:55,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:37:55,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d21b67f-089e-4e9c-8e91-3b48780078b6/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:55,124 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d21b67f-089e-4e9c-8e91-3b48780078b6/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:37:55,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d21b67f-089e-4e9c-8e91-3b48780078b6/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:37:55,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:37:55,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:37:55,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 20:37:55,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 20:37:55,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:37:55,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:37:55,161 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 20:37:55,238 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:37:55,241 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:37:55,443 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:37:55,512 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:37:55,513 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-23 20:37:55,515 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:37:55 BoogieIcfgContainer [2023-11-23 20:37:55,520 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:37:55,523 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:37:55,524 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:37:55,529 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:37:55,531 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:37:54" (1/3) ... [2023-11-23 20:37:55,532 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74d5f564 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:37:55, skipping insertion in model container [2023-11-23 20:37:55,533 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:54" (2/3) ... [2023-11-23 20:37:55,535 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74d5f564 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:37:55, skipping insertion in model container [2023-11-23 20:37:55,535 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:37:55" (3/3) ... [2023-11-23 20:37:55,538 INFO L112 eAbstractionObserver]: Analyzing ICFG indp3f.c [2023-11-23 20:37:55,565 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:37:55,565 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:37:55,644 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:37:55,655 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;@5d87137, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:37:55,656 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:37:55,662 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 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) [2023-11-23 20:37:55,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 20:37:55,673 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:55,674 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:55,677 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:55,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:55,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1540455325, now seen corresponding path program 1 times [2023-11-23 20:37:55,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:55,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11714621] [2023-11-23 20:37:55,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:55,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:55,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:55,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:55,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11714621] [2023-11-23 20:37:55,907 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-23 20:37:55,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897341399] [2023-11-23 20:37:55,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:55,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:55,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d21b67f-089e-4e9c-8e91-3b48780078b6/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:55,911 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d21b67f-089e-4e9c-8e91-3b48780078b6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:55,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d21b67f-089e-4e9c-8e91-3b48780078b6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:37:56,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:56,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:37:56,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:56,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:37:56,088 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:56,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897341399] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:56,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:56,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:37:56,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634130176] [2023-11-23 20:37:56,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:56,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:37:56,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:56,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:37:56,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:37:56,137 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 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 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:37:56,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:56,197 INFO L93 Difference]: Finished difference Result 24 states and 35 transitions. [2023-11-23 20:37:56,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:56,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-23 20:37:56,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:56,208 INFO L225 Difference]: With dead ends: 24 [2023-11-23 20:37:56,209 INFO L226 Difference]: Without dead ends: 12 [2023-11-23 20:37:56,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:37:56,217 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:56,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:37:56,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-11-23 20:37:56,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-11-23 20:37:56,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 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) [2023-11-23 20:37:56,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2023-11-23 20:37:56,257 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2023-11-23 20:37:56,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:56,257 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2023-11-23 20:37:56,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:37:56,265 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2023-11-23 20:37:56,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 20:37:56,265 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:56,266 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:56,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d21b67f-089e-4e9c-8e91-3b48780078b6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 20:37:56,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d21b67f-089e-4e9c-8e91-3b48780078b6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-23 20:37:56,477 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:56,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:56,479 INFO L85 PathProgramCache]: Analyzing trace with hash -528745265, now seen corresponding path program 1 times [2023-11-23 20:37:56,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:56,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953916753] [2023-11-23 20:37:56,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:56,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:56,521 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:37:56,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1623729375] [2023-11-23 20:37:56,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:56,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:56,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d21b67f-089e-4e9c-8e91-3b48780078b6/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:56,524 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d21b67f-089e-4e9c-8e91-3b48780078b6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:56,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d21b67f-089e-4e9c-8e91-3b48780078b6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:37:56,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:56,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:37:56,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:56,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 20:37:56,627 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:56,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:56,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953916753] [2023-11-23 20:37:56,631 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:37:56,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623729375] [2023-11-23 20:37:56,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623729375] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:56,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:56,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:37:56,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632288082] [2023-11-23 20:37:56,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:56,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:37:56,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:56,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:37:56,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:37:56,642 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2023-11-23 20:37:56,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:56,720 INFO L93 Difference]: Finished difference Result 27 states and 36 transitions. [2023-11-23 20:37:56,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:37:56,721 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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 [2023-11-23 20:37:56,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:56,723 INFO L225 Difference]: With dead ends: 27 [2023-11-23 20:37:56,724 INFO L226 Difference]: Without dead ends: 20 [2023-11-23 20:37:56,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:37:56,727 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:56,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 6 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:37:56,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-23 20:37:56,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2023-11-23 20:37:56,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 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) [2023-11-23 20:37:56,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2023-11-23 20:37:56,741 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 10 [2023-11-23 20:37:56,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:56,741 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2023-11-23 20:37:56,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2023-11-23 20:37:56,743 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2023-11-23 20:37:56,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-23 20:37:56,745 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:56,745 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:56,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d21b67f-089e-4e9c-8e91-3b48780078b6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:56,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d21b67f-089e-4e9c-8e91-3b48780078b6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:56,961 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:56,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:56,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1508448028, now seen corresponding path program 1 times [2023-11-23 20:37:56,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:56,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831414903] [2023-11-23 20:37:56,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:56,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:56,984 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:37:56,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1263287943] [2023-11-23 20:37:56,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:56,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:56,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d21b67f-089e-4e9c-8e91-3b48780078b6/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:56,987 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d21b67f-089e-4e9c-8e91-3b48780078b6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:57,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d21b67f-089e-4e9c-8e91-3b48780078b6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 20:37:57,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 20:37:57,081 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 20:37:57,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 20:37:57,121 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-23 20:37:57,121 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-23 20:37:57,123 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-23 20:37:57,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d21b67f-089e-4e9c-8e91-3b48780078b6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-23 20:37:57,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d21b67f-089e-4e9c-8e91-3b48780078b6/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:57,346 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-23 20:37:57,349 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-23 20:37:57,375 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 08:37:57 BoogieIcfgContainer [2023-11-23 20:37:57,375 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-23 20:37:57,376 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-23 20:37:57,376 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-23 20:37:57,377 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-23 20:37:57,377 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:37:55" (3/4) ... [2023-11-23 20:37:57,378 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-23 20:37:57,427 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d21b67f-089e-4e9c-8e91-3b48780078b6/bin/utaipan-verify-mE87zJ7Ire/witness.graphml [2023-11-23 20:37:57,427 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-23 20:37:57,428 INFO L158 Benchmark]: Toolchain (without parser) took 2830.51ms. Allocated memory was 127.9MB in the beginning and 157.3MB in the end (delta: 29.4MB). Free memory was 84.4MB in the beginning and 87.1MB in the end (delta: -2.7MB). Peak memory consumption was 29.3MB. Max. memory is 16.1GB. [2023-11-23 20:37:57,429 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 96.5MB. Free memory is still 50.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 20:37:57,429 INFO L158 Benchmark]: CACSL2BoogieTranslator took 365.38ms. Allocated memory is still 127.9MB. Free memory was 84.1MB in the beginning and 73.2MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-23 20:37:57,430 INFO L158 Benchmark]: Boogie Procedure Inliner took 64.43ms. Allocated memory is still 127.9MB. Free memory was 73.2MB in the beginning and 71.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 20:37:57,431 INFO L158 Benchmark]: Boogie Preprocessor took 52.80ms. Allocated memory is still 127.9MB. Free memory was 71.5MB in the beginning and 70.2MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 20:37:57,431 INFO L158 Benchmark]: RCFGBuilder took 431.02ms. Allocated memory is still 127.9MB. Free memory was 70.2MB in the beginning and 55.6MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-23 20:37:57,432 INFO L158 Benchmark]: TraceAbstraction took 1852.31ms. Allocated memory was 127.9MB in the beginning and 157.3MB in the end (delta: 29.4MB). Free memory was 55.1MB in the beginning and 89.2MB in the end (delta: -34.1MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 20:37:57,432 INFO L158 Benchmark]: Witness Printer took 51.09ms. Allocated memory is still 157.3MB. Free memory was 89.2MB in the beginning and 87.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 20:37:57,436 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 96.5MB. Free memory is still 50.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 365.38ms. Allocated memory is still 127.9MB. Free memory was 84.1MB in the beginning and 73.2MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 64.43ms. Allocated memory is still 127.9MB. Free memory was 73.2MB in the beginning and 71.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 52.80ms. Allocated memory is still 127.9MB. Free memory was 71.5MB in the beginning and 70.2MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 431.02ms. Allocated memory is still 127.9MB. Free memory was 70.2MB in the beginning and 55.6MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 1852.31ms. Allocated memory was 127.9MB in the beginning and 157.3MB in the end (delta: 29.4MB). Free memory was 55.1MB in the beginning and 89.2MB in the end (delta: -34.1MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 51.09ms. Allocated memory is still 157.3MB. Free memory was 89.2MB in the beginning and 87.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L30] i=0 VAL [N=1, a={-1:0}, i=0] [L30] COND TRUE i