./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_init5_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_03d5e711-3287-49a4-833c-6a652b04446f/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d5e711-3287-49a4-833c-6a652b04446f/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d5e711-3287-49a4-833c-6a652b04446f/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d5e711-3287-49a4-833c-6a652b04446f/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_init5_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d5e711-3287-49a4-833c-6a652b04446f/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d5e711-3287-49a4-833c-6a652b04446f/bin/utaipan-verify-nQ1chXbOIh --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 a4846ac0596361a9114a94843302c8ab94d86ee4373eaf89126c12ed566c8536 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 12:48:48,441 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 12:48:48,503 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d5e711-3287-49a4-833c-6a652b04446f/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 12:48:48,508 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 12:48:48,508 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 12:48:48,532 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 12:48:48,532 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 12:48:48,533 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 12:48:48,533 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 12:48:48,534 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 12:48:48,534 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 12:48:48,535 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 12:48:48,536 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 12:48:48,536 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 12:48:48,537 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 12:48:48,537 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 12:48:48,538 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 12:48:48,538 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 12:48:48,539 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 12:48:48,539 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 12:48:48,540 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 12:48:48,540 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 12:48:48,541 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 12:48:48,542 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 12:48:48,542 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 12:48:48,543 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 12:48:48,543 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 12:48:48,543 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 12:48:48,544 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 12:48:48,544 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 12:48:48,544 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 12:48:48,545 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 12:48:48,545 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 12:48:48,545 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 12:48:48,546 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 12:48:48,546 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 12:48:48,546 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 12:48:48,546 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:48:48,546 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 12:48:48,547 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 12:48:48,547 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 12:48:48,547 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 12:48:48,547 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 12:48:48,547 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 12:48:48,548 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 12:48:48,548 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 12:48:48,548 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 12:48:48,548 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_03d5e711-3287-49a4-833c-6a652b04446f/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d5e711-3287-49a4-833c-6a652b04446f/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4846ac0596361a9114a94843302c8ab94d86ee4373eaf89126c12ed566c8536 [2023-12-02 12:48:48,749 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 12:48:48,773 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 12:48:48,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 12:48:48,777 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 12:48:48,777 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 12:48:48,778 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d5e711-3287-49a4-833c-6a652b04446f/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/array-examples/standard_init5_ground-2.i [2023-12-02 12:48:51,618 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 12:48:51,794 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 12:48:51,795 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d5e711-3287-49a4-833c-6a652b04446f/sv-benchmarks/c/array-examples/standard_init5_ground-2.i [2023-12-02 12:48:51,801 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d5e711-3287-49a4-833c-6a652b04446f/bin/utaipan-verify-nQ1chXbOIh/data/17d582954/d0f51a4a0e6646d4a37c9eb4d4db9bc4/FLAG2075499ec [2023-12-02 12:48:51,813 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d5e711-3287-49a4-833c-6a652b04446f/bin/utaipan-verify-nQ1chXbOIh/data/17d582954/d0f51a4a0e6646d4a37c9eb4d4db9bc4 [2023-12-02 12:48:51,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 12:48:51,818 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 12:48:51,819 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 12:48:51,819 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 12:48:51,823 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 12:48:51,823 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:48:51" (1/1) ... [2023-12-02 12:48:51,824 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37689e5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:51, skipping insertion in model container [2023-12-02 12:48:51,825 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:48:51" (1/1) ... [2023-12-02 12:48:51,842 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 12:48:51,958 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_03d5e711-3287-49a4-833c-6a652b04446f/sv-benchmarks/c/array-examples/standard_init5_ground-2.i[816,829] [2023-12-02 12:48:51,971 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:48:51,979 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 12:48:51,989 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_03d5e711-3287-49a4-833c-6a652b04446f/sv-benchmarks/c/array-examples/standard_init5_ground-2.i[816,829] [2023-12-02 12:48:51,996 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:48:52,009 INFO L206 MainTranslator]: Completed translation [2023-12-02 12:48:52,010 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:52 WrapperNode [2023-12-02 12:48:52,010 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 12:48:52,011 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 12:48:52,011 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 12:48:52,011 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 12:48:52,016 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:52" (1/1) ... [2023-12-02 12:48:52,022 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:52" (1/1) ... [2023-12-02 12:48:52,037 INFO L138 Inliner]: procedures = 15, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2023-12-02 12:48:52,038 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 12:48:52,038 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 12:48:52,038 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 12:48:52,039 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 12:48:52,046 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:52" (1/1) ... [2023-12-02 12:48:52,046 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:52" (1/1) ... [2023-12-02 12:48:52,048 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:52" (1/1) ... [2023-12-02 12:48:52,048 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:52" (1/1) ... [2023-12-02 12:48:52,053 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:52" (1/1) ... [2023-12-02 12:48:52,057 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:52" (1/1) ... [2023-12-02 12:48:52,059 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:52" (1/1) ... [2023-12-02 12:48:52,060 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:52" (1/1) ... [2023-12-02 12:48:52,062 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 12:48:52,063 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 12:48:52,063 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 12:48:52,063 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 12:48:52,064 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:52" (1/1) ... [2023-12-02 12:48:52,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:48:52,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d5e711-3287-49a4-833c-6a652b04446f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:48:52,095 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d5e711-3287-49a4-833c-6a652b04446f/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 12:48:52,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d5e711-3287-49a4-833c-6a652b04446f/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 12:48:52,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 12:48:52,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 12:48:52,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 12:48:52,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 12:48:52,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 12:48:52,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 12:48:52,129 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 12:48:52,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 12:48:52,196 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 12:48:52,198 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 12:48:52,330 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 12:48:52,374 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 12:48:52,375 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-12-02 12:48:52,376 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:48:52 BoogieIcfgContainer [2023-12-02 12:48:52,376 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 12:48:52,379 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 12:48:52,379 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 12:48:52,383 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 12:48:52,383 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:48:51" (1/3) ... [2023-12-02 12:48:52,384 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@411397ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:48:52, skipping insertion in model container [2023-12-02 12:48:52,384 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:52" (2/3) ... [2023-12-02 12:48:52,384 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@411397ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:48:52, skipping insertion in model container [2023-12-02 12:48:52,385 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:48:52" (3/3) ... [2023-12-02 12:48:52,386 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_init5_ground-2.i [2023-12-02 12:48:52,400 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 12:48:52,401 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 12:48:52,453 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 12:48:52,460 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;@4e721c12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 12:48:52,460 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 12:48:52,463 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 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) [2023-12-02 12:48:52,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 12:48:52,469 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:48:52,470 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:48:52,470 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:48:52,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:48:52,474 INFO L85 PathProgramCache]: Analyzing trace with hash -738980000, now seen corresponding path program 1 times [2023-12-02 12:48:52,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:48:52,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340261650] [2023-12-02 12:48:52,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:48:52,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:48:52,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:48:52,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:48:52,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:48:52,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340261650] [2023-12-02 12:48:52,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340261650] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:48:52,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:48:52,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 12:48:52,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713559858] [2023-12-02 12:48:52,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:48:52,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:48:52,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:48:52,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:48:52,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:48:52,699 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 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) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 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) [2023-12-02 12:48:52,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:48:52,751 INFO L93 Difference]: Finished difference Result 27 states and 43 transitions. [2023-12-02 12:48:52,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:48:52,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 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 [2023-12-02 12:48:52,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:48:52,762 INFO L225 Difference]: With dead ends: 27 [2023-12-02 12:48:52,762 INFO L226 Difference]: Without dead ends: 16 [2023-12-02 12:48:52,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:48:52,767 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:48:52,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:48:52,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-12-02 12:48:52,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-12-02 12:48:52,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 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) [2023-12-02 12:48:52,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2023-12-02 12:48:52,794 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 9 [2023-12-02 12:48:52,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:48:52,794 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2023-12-02 12:48:52,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 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) [2023-12-02 12:48:52,795 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2023-12-02 12:48:52,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 12:48:52,795 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:48:52,796 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:48:52,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 12:48:52,796 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:48:52,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:48:52,797 INFO L85 PathProgramCache]: Analyzing trace with hash -2060925733, now seen corresponding path program 1 times [2023-12-02 12:48:52,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:48:52,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029220272] [2023-12-02 12:48:52,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:48:52,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:48:52,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:48:52,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 12:48:52,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:48:52,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029220272] [2023-12-02 12:48:52,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029220272] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:48:52,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148409502] [2023-12-02 12:48:52,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:48:52,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:48:52,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d5e711-3287-49a4-833c-6a652b04446f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:48:52,905 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d5e711-3287-49a4-833c-6a652b04446f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:48:52,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d5e711-3287-49a4-833c-6a652b04446f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 12:48:52,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:48:52,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 12:48:52,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:48:53,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 12:48:53,025 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:48:53,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 12:48:53,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148409502] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:48:53,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [457313765] [2023-12-02 12:48:53,068 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-12-02 12:48:53,069 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:48:53,073 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:48:53,078 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:48:53,078 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:48:53,532 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:48:53,634 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '173#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem2#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (not (= |ULTIMATE.start_main_#t~mem2#1| 45)))' at error location [2023-12-02 12:48:53,635 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:48:53,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:48:53,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-12-02 12:48:53,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159776903] [2023-12-02 12:48:53,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:48:53,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 12:48:53,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:48:53,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 12:48:53,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-12-02 12:48:53,638 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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) [2023-12-02 12:48:53,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:48:53,731 INFO L93 Difference]: Finished difference Result 44 states and 68 transitions. [2023-12-02 12:48:53,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 12:48:53,732 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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) Word has length 14 [2023-12-02 12:48:53,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:48:53,733 INFO L225 Difference]: With dead ends: 44 [2023-12-02 12:48:53,733 INFO L226 Difference]: Without dead ends: 31 [2023-12-02 12:48:53,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-12-02 12:48:53,735 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:48:53,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:48:53,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-02 12:48:53,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-12-02 12:48:53,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 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) [2023-12-02 12:48:53,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2023-12-02 12:48:53,742 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 14 [2023-12-02 12:48:53,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:48:53,743 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2023-12-02 12:48:53,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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) [2023-12-02 12:48:53,743 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2023-12-02 12:48:53,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 12:48:53,744 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:48:53,744 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:48:53,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d5e711-3287-49a4-833c-6a652b04446f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 12:48:53,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d5e711-3287-49a4-833c-6a652b04446f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-12-02 12:48:53,945 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:48:53,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:48:53,946 INFO L85 PathProgramCache]: Analyzing trace with hash 834110752, now seen corresponding path program 2 times [2023-12-02 12:48:53,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:48:53,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814968053] [2023-12-02 12:48:53,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:48:53,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:48:53,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:48:54,144 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 12:48:54,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:48:54,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814968053] [2023-12-02 12:48:54,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814968053] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:48:54,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117106522] [2023-12-02 12:48:54,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:48:54,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:48:54,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d5e711-3287-49a4-833c-6a652b04446f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:48:54,147 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d5e711-3287-49a4-833c-6a652b04446f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:48:54,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d5e711-3287-49a4-833c-6a652b04446f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 12:48:54,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 12:48:54,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:48:54,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 12:48:54,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:48:54,285 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 12:48:54,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:48:54,345 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 12:48:54,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117106522] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:48:54,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1475079977] [2023-12-02 12:48:54,349 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-12-02 12:48:54,349 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:48:54,349 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:48:54,358 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:48:54,359 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:48:54,606 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:48:54,712 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '494#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem2#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (not (= |ULTIMATE.start_main_#t~mem2#1| 45)))' at error location [2023-12-02 12:48:54,712 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:48:54,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:48:54,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2023-12-02 12:48:54,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223022103] [2023-12-02 12:48:54,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:48:54,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 12:48:54,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:48:54,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 12:48:54,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2023-12-02 12:48:54,715 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2023-12-02 12:48:54,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:48:54,907 INFO L93 Difference]: Finished difference Result 86 states and 125 transitions. [2023-12-02 12:48:54,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 12:48:54,907 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 29 [2023-12-02 12:48:54,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:48:54,908 INFO L225 Difference]: With dead ends: 86 [2023-12-02 12:48:54,909 INFO L226 Difference]: Without dead ends: 61 [2023-12-02 12:48:54,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2023-12-02 12:48:54,910 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:48:54,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:48:54,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-12-02 12:48:54,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-12-02 12:48:54,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1) internal successors, (66), 60 states have internal predecessors, (66), 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) [2023-12-02 12:48:54,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2023-12-02 12:48:54,921 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 29 [2023-12-02 12:48:54,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:48:54,921 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2023-12-02 12:48:54,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2023-12-02 12:48:54,922 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2023-12-02 12:48:54,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-12-02 12:48:54,923 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:48:54,924 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:48:54,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d5e711-3287-49a4-833c-6a652b04446f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 12:48:55,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d5e711-3287-49a4-833c-6a652b04446f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-12-02 12:48:55,131 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:48:55,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:48:55,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1811820992, now seen corresponding path program 3 times [2023-12-02 12:48:55,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:48:55,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856647848] [2023-12-02 12:48:55,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:48:55,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:48:55,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:48:55,542 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-12-02 12:48:55,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:48:55,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856647848] [2023-12-02 12:48:55,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856647848] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:48:55,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060171002] [2023-12-02 12:48:55,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 12:48:55,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:48:55,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d5e711-3287-49a4-833c-6a652b04446f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:48:55,544 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d5e711-3287-49a4-833c-6a652b04446f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:48:55,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d5e711-3287-49a4-833c-6a652b04446f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 12:48:55,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 12:48:55,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:48:55,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 12:48:55,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:48:55,746 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-12-02 12:48:55,746 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:48:55,957 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-12-02 12:48:55,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060171002] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:48:55,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2029142] [2023-12-02 12:48:55,961 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-12-02 12:48:55,961 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:48:55,961 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:48:55,962 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:48:55,962 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:48:56,129 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:48:56,248 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1151#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem2#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (not (= |ULTIMATE.start_main_#t~mem2#1| 45)))' at error location [2023-12-02 12:48:56,248 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:48:56,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:48:56,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-12-02 12:48:56,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112132619] [2023-12-02 12:48:56,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:48:56,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 12:48:56,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:48:56,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 12:48:56,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2023-12-02 12:48:56,251 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:48:56,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:48:56,607 INFO L93 Difference]: Finished difference Result 170 states and 239 transitions. [2023-12-02 12:48:56,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 12:48:56,608 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-12-02 12:48:56,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:48:56,609 INFO L225 Difference]: With dead ends: 170 [2023-12-02 12:48:56,609 INFO L226 Difference]: Without dead ends: 121 [2023-12-02 12:48:56,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2023-12-02 12:48:56,612 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:48:56,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 12:48:56,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-12-02 12:48:56,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2023-12-02 12:48:56,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.05) internal successors, (126), 120 states have internal predecessors, (126), 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) [2023-12-02 12:48:56,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 126 transitions. [2023-12-02 12:48:56,628 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 126 transitions. Word has length 59 [2023-12-02 12:48:56,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:48:56,629 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 126 transitions. [2023-12-02 12:48:56,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:48:56,629 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 126 transitions. [2023-12-02 12:48:56,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-12-02 12:48:56,631 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:48:56,631 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:48:56,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d5e711-3287-49a4-833c-6a652b04446f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 12:48:56,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d5e711-3287-49a4-833c-6a652b04446f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-12-02 12:48:56,832 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:48:56,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:48:56,832 INFO L85 PathProgramCache]: Analyzing trace with hash 527885056, now seen corresponding path program 4 times [2023-12-02 12:48:56,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:48:56,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66502126] [2023-12-02 12:48:56,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:48:56,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:48:56,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:48:58,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2023-12-02 12:48:58,004 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:48:58,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66502126] [2023-12-02 12:48:58,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66502126] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:48:58,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827124917] [2023-12-02 12:48:58,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 12:48:58,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:48:58,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d5e711-3287-49a4-833c-6a652b04446f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:48:58,006 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d5e711-3287-49a4-833c-6a652b04446f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:48:58,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d5e711-3287-49a4-833c-6a652b04446f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 12:48:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:48:58,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 12:48:58,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:48:58,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2023-12-02 12:48:58,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:48:58,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2023-12-02 12:48:58,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827124917] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:48:58,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2036910507] [2023-12-02 12:48:58,970 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-12-02 12:48:58,970 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:48:58,970 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:48:58,970 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:48:58,971 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:48:59,136 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:48:59,274 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2480#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem2#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (not (= |ULTIMATE.start_main_#t~mem2#1| 45)))' at error location [2023-12-02 12:48:59,275 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:48:59,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:48:59,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2023-12-02 12:48:59,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361359509] [2023-12-02 12:48:59,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:48:59,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-02 12:48:59,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:48:59,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-02 12:48:59,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2023-12-02 12:48:59,279 INFO L87 Difference]: Start difference. First operand 121 states and 126 transitions. Second operand has 49 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 48 states have internal predecessors, (61), 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) [2023-12-02 12:48:59,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:48:59,901 INFO L93 Difference]: Finished difference Result 338 states and 467 transitions. [2023-12-02 12:48:59,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-02 12:48:59,901 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 48 states have internal predecessors, (61), 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 119 [2023-12-02 12:48:59,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:48:59,903 INFO L225 Difference]: With dead ends: 338 [2023-12-02 12:48:59,904 INFO L226 Difference]: Without dead ends: 241 [2023-12-02 12:48:59,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2023-12-02 12:48:59,906 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 617 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 617 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:48:59,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [617 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 12:48:59,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2023-12-02 12:48:59,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2023-12-02 12:48:59,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.025) internal successors, (246), 240 states have internal predecessors, (246), 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) [2023-12-02 12:48:59,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 246 transitions. [2023-12-02 12:48:59,931 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 246 transitions. Word has length 119 [2023-12-02 12:48:59,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:48:59,931 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 246 transitions. [2023-12-02 12:48:59,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 48 states have internal predecessors, (61), 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) [2023-12-02 12:48:59,931 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 246 transitions. [2023-12-02 12:48:59,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2023-12-02 12:48:59,936 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:48:59,936 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:48:59,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d5e711-3287-49a4-833c-6a652b04446f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 12:49:00,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d5e711-3287-49a4-833c-6a652b04446f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:49:00,138 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:49:00,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:49:00,139 INFO L85 PathProgramCache]: Analyzing trace with hash -2080529024, now seen corresponding path program 5 times [2023-12-02 12:49:00,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:49:00,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381088477] [2023-12-02 12:49:00,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:49:00,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:49:00,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:49:03,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5405 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2023-12-02 12:49:03,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:49:03,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381088477] [2023-12-02 12:49:03,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381088477] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:49:03,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126457687] [2023-12-02 12:49:03,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:49:03,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:49:03,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d5e711-3287-49a4-833c-6a652b04446f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:49:03,286 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d5e711-3287-49a4-833c-6a652b04446f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:49:03,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03d5e711-3287-49a4-833c-6a652b04446f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process