./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_monotonic.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf9e5b97-9a01-406c-b424-feac3d60e4db/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf9e5b97-9a01-406c-b424-feac3d60e4db/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_cf9e5b97-9a01-406c-b424-feac3d60e4db/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf9e5b97-9a01-406c-b424-feac3d60e4db/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_monotonic.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf9e5b97-9a01-406c-b424-feac3d60e4db/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_cf9e5b97-9a01-406c-b424-feac3d60e4db/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 32c4229282aa8583dd78af7db3951b4b02cf6352dc78922adb29bd4d79cf61bb --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 19:03:25,115 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 19:03:25,190 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf9e5b97-9a01-406c-b424-feac3d60e4db/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 19:03:25,195 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 19:03:25,195 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 19:03:25,218 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 19:03:25,219 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 19:03:25,219 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 19:03:25,220 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 19:03:25,220 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 19:03:25,221 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 19:03:25,222 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 19:03:25,222 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 19:03:25,222 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 19:03:25,223 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 19:03:25,223 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 19:03:25,224 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 19:03:25,224 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 19:03:25,225 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 19:03:25,225 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 19:03:25,226 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 19:03:25,227 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 19:03:25,227 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 19:03:25,228 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 19:03:25,228 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 19:03:25,229 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 19:03:25,229 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 19:03:25,229 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 19:03:25,230 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 19:03:25,230 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 19:03:25,231 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 19:03:25,231 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 19:03:25,231 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 19:03:25,232 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 19:03:25,232 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 19:03:25,232 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 19:03:25,232 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 19:03:25,233 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:03:25,233 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 19:03:25,233 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 19:03:25,233 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 19:03:25,234 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 19:03:25,234 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 19:03:25,234 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 19:03:25,234 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 19:03:25,234 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 19:03:25,234 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 19:03:25,235 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_cf9e5b97-9a01-406c-b424-feac3d60e4db/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf9e5b97-9a01-406c-b424-feac3d60e4db/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 32c4229282aa8583dd78af7db3951b4b02cf6352dc78922adb29bd4d79cf61bb [2023-12-02 19:03:25,457 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 19:03:25,477 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 19:03:25,480 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 19:03:25,481 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 19:03:25,481 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 19:03:25,483 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf9e5b97-9a01-406c-b424-feac3d60e4db/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_monotonic.i [2023-12-02 19:03:28,217 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 19:03:28,378 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 19:03:28,378 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf9e5b97-9a01-406c-b424-feac3d60e4db/sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_monotonic.i [2023-12-02 19:03:28,385 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf9e5b97-9a01-406c-b424-feac3d60e4db/bin/utaipan-verify-nQ1chXbOIh/data/e933dfc69/cd3fd72d2c0d418e94d0121ece319819/FLAGaaa79ca9e [2023-12-02 19:03:28,400 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf9e5b97-9a01-406c-b424-feac3d60e4db/bin/utaipan-verify-nQ1chXbOIh/data/e933dfc69/cd3fd72d2c0d418e94d0121ece319819 [2023-12-02 19:03:28,403 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 19:03:28,405 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 19:03:28,406 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 19:03:28,406 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 19:03:28,412 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 19:03:28,412 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:03:28" (1/1) ... [2023-12-02 19:03:28,413 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@103f56bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:03:28, skipping insertion in model container [2023-12-02 19:03:28,414 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:03:28" (1/1) ... [2023-12-02 19:03:28,436 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 19:03:28,594 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_cf9e5b97-9a01-406c-b424-feac3d60e4db/sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_monotonic.i[999,1012] [2023-12-02 19:03:28,611 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:03:28,622 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 19:03:28,636 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_cf9e5b97-9a01-406c-b424-feac3d60e4db/sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_monotonic.i[999,1012] [2023-12-02 19:03:28,641 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:03:28,657 INFO L206 MainTranslator]: Completed translation [2023-12-02 19:03:28,658 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:03:28 WrapperNode [2023-12-02 19:03:28,658 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 19:03:28,659 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 19:03:28,659 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 19:03:28,659 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 19:03:28,667 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:03:28" (1/1) ... [2023-12-02 19:03:28,675 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:03:28" (1/1) ... [2023-12-02 19:03:28,692 INFO L138 Inliner]: procedures = 19, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 56 [2023-12-02 19:03:28,692 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 19:03:28,692 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 19:03:28,693 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 19:03:28,693 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 19:03:28,699 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:03:28" (1/1) ... [2023-12-02 19:03:28,699 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:03:28" (1/1) ... [2023-12-02 19:03:28,701 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:03:28" (1/1) ... [2023-12-02 19:03:28,702 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:03:28" (1/1) ... [2023-12-02 19:03:28,706 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:03:28" (1/1) ... [2023-12-02 19:03:28,708 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:03:28" (1/1) ... [2023-12-02 19:03:28,709 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:03:28" (1/1) ... [2023-12-02 19:03:28,710 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:03:28" (1/1) ... [2023-12-02 19:03:28,712 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 19:03:28,712 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 19:03:28,712 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 19:03:28,713 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 19:03:28,713 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:03:28" (1/1) ... [2023-12-02 19:03:28,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:03:28,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf9e5b97-9a01-406c-b424-feac3d60e4db/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:03:28,740 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf9e5b97-9a01-406c-b424-feac3d60e4db/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 19:03:28,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf9e5b97-9a01-406c-b424-feac3d60e4db/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 19:03:28,770 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 19:03:28,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 19:03:28,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 19:03:28,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 19:03:28,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 19:03:28,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 19:03:28,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 19:03:28,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 19:03:28,771 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 19:03:28,848 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 19:03:28,850 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 19:03:28,972 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 19:03:29,029 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 19:03:29,030 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 19:03:29,031 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:03:29 BoogieIcfgContainer [2023-12-02 19:03:29,032 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 19:03:29,035 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 19:03:29,035 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 19:03:29,038 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 19:03:29,038 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:03:28" (1/3) ... [2023-12-02 19:03:29,039 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e8609fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:03:29, skipping insertion in model container [2023-12-02 19:03:29,039 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:03:28" (2/3) ... [2023-12-02 19:03:29,039 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e8609fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:03:29, skipping insertion in model container [2023-12-02 19:03:29,039 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:03:29" (3/3) ... [2023-12-02 19:03:29,041 INFO L112 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_monotonic.i [2023-12-02 19:03:29,055 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 19:03:29,056 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 19:03:29,096 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 19:03:29,102 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;@2436465b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 19:03:29,102 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 19:03:29,105 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:03:29,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 19:03:29,110 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:03:29,111 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 19:03:29,111 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:03:29,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:03:29,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1715539283, now seen corresponding path program 1 times [2023-12-02 19:03:29,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:03:29,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968570776] [2023-12-02 19:03:29,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:03:29,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:03:29,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:03:29,286 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 19:03:29,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:03:29,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968570776] [2023-12-02 19:03:29,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968570776] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:03:29,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:03:29,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 19:03:29,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400982530] [2023-12-02 19:03:29,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:03:29,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:03:29,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:03:29,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:03:29,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:03:29,320 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 19:03:29,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:03:29,361 INFO L93 Difference]: Finished difference Result 26 states and 35 transitions. [2023-12-02 19:03:29,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:03:29,363 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2023-12-02 19:03:29,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:03:29,369 INFO L225 Difference]: With dead ends: 26 [2023-12-02 19:03:29,369 INFO L226 Difference]: Without dead ends: 17 [2023-12-02 19:03:29,371 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 19:03:29,374 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:03:29,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 12 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:03:29,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-12-02 19:03:29,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 10. [2023-12-02 19:03:29,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:03:29,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2023-12-02 19:03:29,402 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2023-12-02 19:03:29,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:03:29,402 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2023-12-02 19:03:29,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 19:03:29,403 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2023-12-02 19:03:29,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 19:03:29,403 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:03:29,403 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:03:29,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 19:03:29,404 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:03:29,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:03:29,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1668984609, now seen corresponding path program 1 times [2023-12-02 19:03:29,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:03:29,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015217186] [2023-12-02 19:03:29,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:03:29,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:03:29,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:03:29,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:03:29,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:03:29,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015217186] [2023-12-02 19:03:29,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015217186] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:03:29,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248282530] [2023-12-02 19:03:29,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:03:29,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:03:29,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf9e5b97-9a01-406c-b424-feac3d60e4db/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:03:29,563 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf9e5b97-9a01-406c-b424-feac3d60e4db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:03:29,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf9e5b97-9a01-406c-b424-feac3d60e4db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 19:03:29,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:03:29,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 19:03:29,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:03:29,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:03:29,709 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:03:29,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:03:29,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248282530] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:03:29,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1252299807] [2023-12-02 19:03:29,750 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-12-02 19:03:29,750 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:03:29,753 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:03:29,758 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:03:29,758 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:03:30,938 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:03:31,034 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '103#(and (= 10 (select (select |#memory_int| |ULTIMATE.start_main_~u~0#1.base|) |ULTIMATE.start_main_~u~0#1.offset|)) (= |ULTIMATE.start_main_#t~mem7#1.base| 0) (= |ULTIMATE.start_main_~u~0#1.offset| (select (select |#memory_$Pointer$.offset| |~#a~0.base|) |~#a~0.offset|)) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~u~0#1.base|) (+ |ULTIMATE.start_main_~u~0#1.offset| 4)) 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~u~0#1.base|) (+ |ULTIMATE.start_main_~u~0#1.offset| 4)) 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~u~0#1.base| (select (select |#memory_$Pointer$.base| |~#a~0.base|) |~#a~0.offset|)))' at error location [2023-12-02 19:03:31,034 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:03:31,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:03:31,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-12-02 19:03:31,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954875510] [2023-12-02 19:03:31,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:03:31,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 19:03:31,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:03:31,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 19:03:31,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=47, Unknown=0, NotChecked=0, Total=90 [2023-12-02 19:03:31,038 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:03:31,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:03:31,097 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2023-12-02 19:03:31,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 19:03:31,097 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 19:03:31,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:03:31,098 INFO L225 Difference]: With dead ends: 42 [2023-12-02 19:03:31,099 INFO L226 Difference]: Without dead ends: 35 [2023-12-02 19:03:31,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=47, Unknown=0, NotChecked=0, Total=90 [2023-12-02 19:03:31,101 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 42 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:03:31,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 24 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:03:31,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-12-02 19:03:31,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 13. [2023-12-02 19:03:31,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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 19:03:31,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-12-02 19:03:31,106 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2023-12-02 19:03:31,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:03:31,107 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-12-02 19:03:31,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:03:31,107 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-12-02 19:03:31,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 19:03:31,108 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:03:31,108 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-12-02 19:03:31,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf9e5b97-9a01-406c-b424-feac3d60e4db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 19:03:31,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf9e5b97-9a01-406c-b424-feac3d60e4db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:03:31,312 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:03:31,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:03:31,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1199435565, now seen corresponding path program 2 times [2023-12-02 19:03:31,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:03:31,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223209265] [2023-12-02 19:03:31,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:03:31,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:03:31,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:03:31,550 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:03:31,550 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:03:31,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223209265] [2023-12-02 19:03:31,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223209265] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:03:31,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537568947] [2023-12-02 19:03:31,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:03:31,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:03:31,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf9e5b97-9a01-406c-b424-feac3d60e4db/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:03:31,553 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf9e5b97-9a01-406c-b424-feac3d60e4db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:03:31,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf9e5b97-9a01-406c-b424-feac3d60e4db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 19:03:31,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 19:03:31,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:03:31,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 19:03:31,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:03:31,812 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:03:31,812 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:03:31,885 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:03:31,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537568947] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:03:31,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [595979545] [2023-12-02 19:03:31,888 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-12-02 19:03:31,888 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:03:31,888 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:03:31,889 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:03:31,889 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:03:33,046 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:03:33,128 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '245#(and (= 10 (select (select |#memory_int| |ULTIMATE.start_main_~u~0#1.base|) |ULTIMATE.start_main_~u~0#1.offset|)) (= |ULTIMATE.start_main_#t~mem7#1.base| 0) (= |ULTIMATE.start_main_~u~0#1.offset| (select (select |#memory_$Pointer$.offset| |~#a~0.base|) |~#a~0.offset|)) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~u~0#1.base|) (+ |ULTIMATE.start_main_~u~0#1.offset| 4)) 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~u~0#1.base|) (+ |ULTIMATE.start_main_~u~0#1.offset| 4)) 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~u~0#1.base| (select (select |#memory_$Pointer$.base| |~#a~0.base|) |~#a~0.offset|)))' at error location [2023-12-02 19:03:33,128 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:03:33,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:03:33,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-12-02 19:03:33,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556455851] [2023-12-02 19:03:33,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:03:33,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 19:03:33,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:03:33,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 19:03:33,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=122, Unknown=0, NotChecked=0, Total=240 [2023-12-02 19:03:33,131 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 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 19:03:33,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:03:33,262 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2023-12-02 19:03:33,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 19:03:33,262 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 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) Word has length 10 [2023-12-02 19:03:33,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:03:33,264 INFO L225 Difference]: With dead ends: 90 [2023-12-02 19:03:33,264 INFO L226 Difference]: Without dead ends: 83 [2023-12-02 19:03:33,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=122, Unknown=0, NotChecked=0, Total=240 [2023-12-02 19:03:33,266 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 119 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:03:33,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 66 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:03:33,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-02 19:03:33,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 19. [2023-12-02 19:03:33,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 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 19:03:33,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2023-12-02 19:03:33,273 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 10 [2023-12-02 19:03:33,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:03:33,273 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2023-12-02 19:03:33,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 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 19:03:33,274 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2023-12-02 19:03:33,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 19:03:33,274 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:03:33,275 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-12-02 19:03:33,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf9e5b97-9a01-406c-b424-feac3d60e4db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 19:03:33,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf9e5b97-9a01-406c-b424-feac3d60e4db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:03:33,475 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:03:33,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:03:33,476 INFO L85 PathProgramCache]: Analyzing trace with hash 690762221, now seen corresponding path program 3 times [2023-12-02 19:03:33,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:03:33,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299212991] [2023-12-02 19:03:33,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:03:33,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:03:33,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:03:34,016 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:03:34,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:03:34,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299212991] [2023-12-02 19:03:34,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299212991] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:03:34,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745657414] [2023-12-02 19:03:34,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 19:03:34,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:03:34,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf9e5b97-9a01-406c-b424-feac3d60e4db/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:03:34,019 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf9e5b97-9a01-406c-b424-feac3d60e4db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:03:34,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf9e5b97-9a01-406c-b424-feac3d60e4db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 19:03:34,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 19:03:34,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:03:34,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 19:03:34,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:03:34,307 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:03:34,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:03:34,538 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:03:34,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745657414] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:03:34,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [520722078] [2023-12-02 19:03:34,541 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-12-02 19:03:34,541 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:03:34,542 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:03:34,542 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:03:34,542 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:03:35,685 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:03:35,747 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '507#(and (= 10 (select (select |#memory_int| |ULTIMATE.start_main_~u~0#1.base|) |ULTIMATE.start_main_~u~0#1.offset|)) (= |ULTIMATE.start_main_#t~mem7#1.base| 0) (= |ULTIMATE.start_main_~u~0#1.offset| (select (select |#memory_$Pointer$.offset| |~#a~0.base|) |~#a~0.offset|)) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~u~0#1.base|) (+ |ULTIMATE.start_main_~u~0#1.offset| 4)) 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~u~0#1.base|) (+ |ULTIMATE.start_main_~u~0#1.offset| 4)) 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~u~0#1.base| (select (select |#memory_$Pointer$.base| |~#a~0.base|) |~#a~0.offset|)))' at error location [2023-12-02 19:03:35,747 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:03:35,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:03:35,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-12-02 19:03:35,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015993866] [2023-12-02 19:03:35,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:03:35,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 19:03:35,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:03:35,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 19:03:35,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=380, Unknown=0, NotChecked=0, Total=756 [2023-12-02 19:03:35,750 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 25 states, 25 states have (on average 1.2) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:03:35,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:03:35,991 INFO L93 Difference]: Finished difference Result 186 states and 222 transitions. [2023-12-02 19:03:35,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 19:03:35,992 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-12-02 19:03:35,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:03:35,994 INFO L225 Difference]: With dead ends: 186 [2023-12-02 19:03:35,994 INFO L226 Difference]: Without dead ends: 179 [2023-12-02 19:03:35,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=376, Invalid=380, Unknown=0, NotChecked=0, Total=756 [2023-12-02 19:03:35,996 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 385 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:03:35,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 132 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 19:03:35,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-12-02 19:03:36,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 31. [2023-12-02 19:03:36,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:03:36,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2023-12-02 19:03:36,006 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 16 [2023-12-02 19:03:36,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:03:36,006 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2023-12-02 19:03:36,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:03:36,006 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2023-12-02 19:03:36,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 19:03:36,007 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:03:36,007 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2023-12-02 19:03:36,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf9e5b97-9a01-406c-b424-feac3d60e4db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-02 19:03:36,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf9e5b97-9a01-406c-b424-feac3d60e4db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:03:36,211 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:03:36,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:03:36,212 INFO L85 PathProgramCache]: Analyzing trace with hash 250447725, now seen corresponding path program 4 times [2023-12-02 19:03:36,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:03:36,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222274467] [2023-12-02 19:03:36,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:03:36,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:03:36,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:03:37,587 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:03:37,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:03:37,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222274467] [2023-12-02 19:03:37,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222274467] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:03:37,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853960775] [2023-12-02 19:03:37,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 19:03:37,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:03:37,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf9e5b97-9a01-406c-b424-feac3d60e4db/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:03:37,589 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf9e5b97-9a01-406c-b424-feac3d60e4db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:03:37,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf9e5b97-9a01-406c-b424-feac3d60e4db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 19:03:38,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:03:38,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 1198 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 19:03:38,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:03:38,114 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:03:38,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:03:38,765 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:03:38,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853960775] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:03:38,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1852086885] [2023-12-02 19:03:38,767 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-12-02 19:03:38,767 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:03:38,767 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:03:38,768 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:03:38,768 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:03:39,536 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:03:39,612 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1009#(and (= 10 (select (select |#memory_int| |ULTIMATE.start_main_~u~0#1.base|) |ULTIMATE.start_main_~u~0#1.offset|)) (= |ULTIMATE.start_main_#t~mem7#1.base| 0) (= |ULTIMATE.start_main_~u~0#1.offset| (select (select |#memory_$Pointer$.offset| |~#a~0.base|) |~#a~0.offset|)) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~u~0#1.base|) (+ |ULTIMATE.start_main_~u~0#1.offset| 4)) 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~u~0#1.base|) (+ |ULTIMATE.start_main_~u~0#1.offset| 4)) 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~u~0#1.base| (select (select |#memory_$Pointer$.base| |~#a~0.base|) |~#a~0.offset|)))' at error location [2023-12-02 19:03:39,612 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:03:39,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:03:39,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2023-12-02 19:03:39,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511943508] [2023-12-02 19:03:39,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:03:39,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-02 19:03:39,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:03:39,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-02 19:03:39,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1324, Invalid=1328, Unknown=0, NotChecked=0, Total=2652 [2023-12-02 19:03:39,617 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:03:40,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:03:40,156 INFO L93 Difference]: Finished difference Result 378 states and 450 transitions. [2023-12-02 19:03:40,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-02 19:03:40,157 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-12-02 19:03:40,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:03:40,160 INFO L225 Difference]: With dead ends: 378 [2023-12-02 19:03:40,160 INFO L226 Difference]: Without dead ends: 371 [2023-12-02 19:03:40,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1324, Invalid=1328, Unknown=0, NotChecked=0, Total=2652 [2023-12-02 19:03:40,163 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1176 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1176 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 19:03:40,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1176 Valid, 276 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 19:03:40,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2023-12-02 19:03:40,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 55. [2023-12-02 19:03:40,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 states have internal predecessors, (57), 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 19:03:40,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2023-12-02 19:03:40,173 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 28 [2023-12-02 19:03:40,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:03:40,173 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2023-12-02 19:03:40,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:03:40,173 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2023-12-02 19:03:40,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-02 19:03:40,175 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:03:40,175 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1] [2023-12-02 19:03:40,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf9e5b97-9a01-406c-b424-feac3d60e4db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 19:03:40,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf9e5b97-9a01-406c-b424-feac3d60e4db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:03:40,375 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:03:40,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:03:40,376 INFO L85 PathProgramCache]: Analyzing trace with hash 844329581, now seen corresponding path program 5 times [2023-12-02 19:03:40,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:03:40,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275877412] [2023-12-02 19:03:40,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:03:40,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:03:40,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:03:43,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:03:43,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:03:43,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275877412] [2023-12-02 19:03:43,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275877412] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:03:43,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349839318] [2023-12-02 19:03:43,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:03:43,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:03:43,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf9e5b97-9a01-406c-b424-feac3d60e4db/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:03:43,937 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf9e5b97-9a01-406c-b424-feac3d60e4db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:03:43,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf9e5b97-9a01-406c-b424-feac3d60e4db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process