./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra-u.c --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_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/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_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/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_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/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 0464cc7a685168b5fc1a1b0dd8da6141b4b98c7c538345750bda8185cd005644 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 17:25:13,621 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 17:25:13,688 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 17:25:13,692 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 17:25:13,692 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 17:25:13,718 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 17:25:13,718 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 17:25:13,719 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 17:25:13,719 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 17:25:13,720 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 17:25:13,721 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 17:25:13,721 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 17:25:13,721 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 17:25:13,722 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 17:25:13,722 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 17:25:13,723 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 17:25:13,723 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 17:25:13,724 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 17:25:13,724 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 17:25:13,725 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 17:25:13,725 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 17:25:13,726 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 17:25:13,727 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 17:25:13,727 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 17:25:13,728 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 17:25:13,728 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 17:25:13,729 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 17:25:13,729 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 17:25:13,729 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 17:25:13,730 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 17:25:13,730 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 17:25:13,730 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 17:25:13,731 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 17:25:13,731 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 17:25:13,731 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 17:25:13,732 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 17:25:13,732 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 17:25:13,732 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:25:13,732 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 17:25:13,733 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 17:25:13,733 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 17:25:13,733 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 17:25:13,733 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 17:25:13,733 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 17:25:13,734 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 17:25:13,734 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 17:25:13,734 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 17:25:13,734 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_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0464cc7a685168b5fc1a1b0dd8da6141b4b98c7c538345750bda8185cd005644 [2023-12-02 17:25:13,981 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 17:25:14,002 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 17:25:14,005 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 17:25:14,006 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 17:25:14,006 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 17:25:14,008 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra-u.c [2023-12-02 17:25:16,747 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 17:25:16,951 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 17:25:16,952 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra-u.c [2023-12-02 17:25:16,961 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/data/5e0fc3e4f/9e885351cbc844aa94cfff8beba4d4b1/FLAG640dd83b9 [2023-12-02 17:25:16,974 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/data/5e0fc3e4f/9e885351cbc844aa94cfff8beba4d4b1 [2023-12-02 17:25:16,977 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 17:25:16,978 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 17:25:16,979 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 17:25:16,980 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 17:25:16,985 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 17:25:16,986 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:25:16" (1/1) ... [2023-12-02 17:25:16,987 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f45b130 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:25:16, skipping insertion in model container [2023-12-02 17:25:16,987 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:25:16" (1/1) ... [2023-12-02 17:25:17,014 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 17:25:17,161 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_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra-u.c[1076,1089] [2023-12-02 17:25:17,201 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:25:17,211 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 17:25:17,224 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_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra-u.c[1076,1089] [2023-12-02 17:25:17,252 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:25:17,267 INFO L206 MainTranslator]: Completed translation [2023-12-02 17:25:17,267 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:25:17 WrapperNode [2023-12-02 17:25:17,267 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 17:25:17,268 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 17:25:17,269 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 17:25:17,269 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 17:25:17,276 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:25:17" (1/1) ... [2023-12-02 17:25:17,288 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:25:17" (1/1) ... [2023-12-02 17:25:17,312 INFO L138 Inliner]: procedures = 17, calls = 173, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 114 [2023-12-02 17:25:17,312 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 17:25:17,313 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 17:25:17,313 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 17:25:17,314 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 17:25:17,323 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:25:17" (1/1) ... [2023-12-02 17:25:17,323 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:25:17" (1/1) ... [2023-12-02 17:25:17,328 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:25:17" (1/1) ... [2023-12-02 17:25:17,328 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:25:17" (1/1) ... [2023-12-02 17:25:17,339 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:25:17" (1/1) ... [2023-12-02 17:25:17,342 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:25:17" (1/1) ... [2023-12-02 17:25:17,344 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:25:17" (1/1) ... [2023-12-02 17:25:17,346 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:25:17" (1/1) ... [2023-12-02 17:25:17,351 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 17:25:17,352 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 17:25:17,352 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 17:25:17,352 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 17:25:17,353 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:25:17" (1/1) ... [2023-12-02 17:25:17,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:25:17,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:25:17,389 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 17:25:17,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 17:25:17,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 17:25:17,427 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_29_to_33_0 [2023-12-02 17:25:17,427 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_29_to_33_0 [2023-12-02 17:25:17,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 17:25:17,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 17:25:17,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 17:25:17,427 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_37_to_53_0 [2023-12-02 17:25:17,428 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_37_to_53_0 [2023-12-02 17:25:17,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 17:25:17,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 17:25:17,428 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 17:25:17,428 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 17:25:17,428 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 17:25:17,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 17:25:17,537 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 17:25:17,539 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 17:25:17,861 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 17:25:17,950 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 17:25:17,950 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 17:25:17,952 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:25:17 BoogieIcfgContainer [2023-12-02 17:25:17,952 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 17:25:17,955 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 17:25:17,955 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 17:25:17,958 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 17:25:17,958 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:25:16" (1/3) ... [2023-12-02 17:25:17,959 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cc6fa63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:25:17, skipping insertion in model container [2023-12-02 17:25:17,959 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:25:17" (2/3) ... [2023-12-02 17:25:17,973 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cc6fa63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:25:17, skipping insertion in model container [2023-12-02 17:25:17,973 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:25:17" (3/3) ... [2023-12-02 17:25:17,974 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_dijkstra-u.c [2023-12-02 17:25:17,988 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 17:25:17,988 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 17:25:18,033 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 17:25:18,040 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;@44530463, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 17:25:18,040 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 17:25:18,045 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 26 states have internal predecessors, (29), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-12-02 17:25:18,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 17:25:18,053 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:25:18,053 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:25:18,054 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:25:18,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:25:18,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1039815652, now seen corresponding path program 1 times [2023-12-02 17:25:18,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:25:18,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202252458] [2023-12-02 17:25:18,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:25:18,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:25:18,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:25:18,273 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 17:25:18,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:25:18,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202252458] [2023-12-02 17:25:18,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202252458] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:25:18,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:25:18,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 17:25:18,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304748540] [2023-12-02 17:25:18,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:25:18,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 17:25:18,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:25:18,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 17:25:18,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 17:25:18,313 INFO L87 Difference]: Start difference. First operand has 41 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 26 states have internal predecessors, (29), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 17:25:18,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:25:18,368 INFO L93 Difference]: Finished difference Result 76 states and 113 transitions. [2023-12-02 17:25:18,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 17:25:18,371 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-12-02 17:25:18,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:25:18,379 INFO L225 Difference]: With dead ends: 76 [2023-12-02 17:25:18,379 INFO L226 Difference]: Without dead ends: 39 [2023-12-02 17:25:18,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 17:25:18,387 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:25:18,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:25:18,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-12-02 17:25:18,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-12-02 17:25:18,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 25 states have internal predecessors, (25), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 17:25:18,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2023-12-02 17:25:18,430 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 13 [2023-12-02 17:25:18,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:25:18,431 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2023-12-02 17:25:18,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 17:25:18,431 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2023-12-02 17:25:18,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 17:25:18,432 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:25:18,433 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:25:18,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 17:25:18,433 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:25:18,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:25:18,434 INFO L85 PathProgramCache]: Analyzing trace with hash -659234062, now seen corresponding path program 1 times [2023-12-02 17:25:18,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:25:18,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916253672] [2023-12-02 17:25:18,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:25:18,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:25:18,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:25:20,189 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 17:25:20,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:25:20,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916253672] [2023-12-02 17:25:20,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916253672] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:25:20,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:25:20,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-12-02 17:25:20,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153722086] [2023-12-02 17:25:20,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:25:20,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 17:25:20,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:25:20,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 17:25:20,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2023-12-02 17:25:20,193 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 13 states, 10 states have (on average 1.0) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 17:25:21,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:25:21,481 INFO L93 Difference]: Finished difference Result 73 states and 95 transitions. [2023-12-02 17:25:21,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 17:25:21,482 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 1.0) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-12-02 17:25:21,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:25:21,485 INFO L225 Difference]: With dead ends: 73 [2023-12-02 17:25:21,485 INFO L226 Difference]: Without dead ends: 71 [2023-12-02 17:25:21,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2023-12-02 17:25:21,488 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 62 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:25:21,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 96 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 17:25:21,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-12-02 17:25:21,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2023-12-02 17:25:21,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 40 states have internal predecessors, (41), 20 states have call successors, (20), 5 states have call predecessors, (20), 7 states have return successors, (24), 19 states have call predecessors, (24), 19 states have call successors, (24) [2023-12-02 17:25:21,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 85 transitions. [2023-12-02 17:25:21,513 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 85 transitions. Word has length 14 [2023-12-02 17:25:21,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:25:21,514 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 85 transitions. [2023-12-02 17:25:21,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 1.0) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 17:25:21,514 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 85 transitions. [2023-12-02 17:25:21,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 17:25:21,515 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:25:21,516 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:25:21,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 17:25:21,516 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:25:21,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:25:21,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1494339006, now seen corresponding path program 1 times [2023-12-02 17:25:21,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:25:21,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390501609] [2023-12-02 17:25:21,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:25:21,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:25:21,539 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:25:21,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [333447396] [2023-12-02 17:25:21,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:25:21,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:25:21,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:25:21,543 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:25:21,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 17:25:21,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:25:21,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 86 conjunts are in the unsatisfiable core [2023-12-02 17:25:21,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:25:22,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:25:22,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:25:22,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:25:22,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:25:22,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:25:22,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:25:22,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:25:22,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:25:22,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:25:22,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:25:22,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:25:22,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:25:22,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:25:22,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:25:22,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:25:22,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:25:22,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2023-12-02 17:25:22,081 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2023-12-02 17:25:22,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 53 [2023-12-02 17:25:22,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-12-02 17:25:22,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-12-02 17:25:22,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-12-02 17:25:23,470 INFO L349 Elim1Store]: treesize reduction 38, result has 85.0 percent of original size [2023-12-02 17:25:23,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 24 case distinctions, treesize of input 96 treesize of output 254 [2023-12-02 17:25:26,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:25:26,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:25:26,605 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:25:26,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390501609] [2023-12-02 17:25:26,605 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:25:26,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333447396] [2023-12-02 17:25:26,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333447396] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:25:26,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [132463027] [2023-12-02 17:25:26,622 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-12-02 17:25:26,622 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:25:26,625 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:25:26,629 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:25:26,629 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:25:26,943 INFO L197 IcfgInterpreter]: Interpreting procedure func_to_recursive_line_29_to_33_0 with input of size 110 for LOIs [2023-12-02 17:25:27,129 INFO L197 IcfgInterpreter]: Interpreting procedure func_to_recursive_line_37_to_53_0 with input of size 106 for LOIs [2023-12-02 17:25:27,587 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 180 for LOIs [2023-12-02 17:25:28,018 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:27:07,112 WARN L293 SmtUtils]: Spent 1.63m on a formula simplification. DAG size of input: 173 DAG size of output: 163 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:28:42,452 WARN L293 SmtUtils]: Spent 1.34m on a formula simplification. DAG size of input: 180 DAG size of output: 170 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:31:10,926 WARN L293 SmtUtils]: Spent 2.39m on a formula simplification. DAG size of input: 182 DAG size of output: 172 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:32:13,248 WARN L293 SmtUtils]: Spent 59.64s on a formula simplification. DAG size of input: 184 DAG size of output: 163 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:32:20,110 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '522#(and (<= 1 |#StackHeapBarrier|) (or (and (exists ((|v_ULTIMATE.start_main_#t~nondet99#1_19| Int)) (<= (mod |v_ULTIMATE.start_main_#t~nondet99#1_19| 4294967296) 1073741822)) (exists ((|v_#memory_int_58| (Array Int (Array Int Int)))) (and (= (select (select |v_#memory_int_58| 1) 0) 48) (= (select (select |v_#memory_int_58| 1) 1) 0))) (exists ((v_func_to_recursive_line_37_to_53_0_~q.base_BEFORE_CALL_5 Int) (v_func_to_recursive_line_37_to_53_0_~r.base_BEFORE_CALL_5 Int) (|v_#valid_31| (Array Int Int)) (v_func_to_recursive_line_37_to_53_0_~n.base_BEFORE_CALL_5 Int) (v_func_to_recursive_line_37_to_53_0_~h.base_BEFORE_CALL_4 Int) (|v_#length_20| (Array Int Int)) (v_func_to_recursive_line_37_to_53_0_~p.base_BEFORE_CALL_5 Int)) (and (= (store (store (store (store (store |v_#valid_31| v_func_to_recursive_line_37_to_53_0_~n.base_BEFORE_CALL_5 1) v_func_to_recursive_line_37_to_53_0_~p.base_BEFORE_CALL_5 1) v_func_to_recursive_line_37_to_53_0_~q.base_BEFORE_CALL_5 1) v_func_to_recursive_line_37_to_53_0_~r.base_BEFORE_CALL_5 1) v_func_to_recursive_line_37_to_53_0_~h.base_BEFORE_CALL_4 1) |#valid|) (<= (+ (mod (select (select |#memory_int| v_func_to_recursive_line_37_to_53_0_~n.base_BEFORE_CALL_5) 0) 4294967296) 1) (mod (select (select |#memory_int| v_func_to_recursive_line_37_to_53_0_~q.base_BEFORE_CALL_5) 0) 4294967296)) (= (store (store (store (store (store |v_#length_20| v_func_to_recursive_line_37_to_53_0_~n.base_BEFORE_CALL_5 4) v_func_to_recursive_line_37_to_53_0_~p.base_BEFORE_CALL_5 4) v_func_to_recursive_line_37_to_53_0_~q.base_BEFORE_CALL_5 4) v_func_to_recursive_line_37_to_53_0_~r.base_BEFORE_CALL_5 4) v_func_to_recursive_line_37_to_53_0_~h.base_BEFORE_CALL_4 4) |#length|) (= (select (store (store (store |v_#valid_31| v_func_to_recursive_line_37_to_53_0_~n.base_BEFORE_CALL_5 1) v_func_to_recursive_line_37_to_53_0_~p.base_BEFORE_CALL_5 1) v_func_to_recursive_line_37_to_53_0_~q.base_BEFORE_CALL_5 1) v_func_to_recursive_line_37_to_53_0_~r.base_BEFORE_CALL_5) 0) (= (select |v_#valid_31| v_func_to_recursive_line_37_to_53_0_~n.base_BEFORE_CALL_5) 0) (<= (mod (+ (select (select |#memory_int| v_func_to_recursive_line_37_to_53_0_~q.base_BEFORE_CALL_5) 0) (* 2 (select (select |#memory_int| v_func_to_recursive_line_37_to_53_0_~p.base_BEFORE_CALL_5) 0))) 4294967296) (mod (select (select |#memory_int| v_func_to_recursive_line_37_to_53_0_~r.base_BEFORE_CALL_5) 0) 4294967296)) (= (select (store (store (store (store |v_#valid_31| v_func_to_recursive_line_37_to_53_0_~n.base_BEFORE_CALL_5 1) v_func_to_recursive_line_37_to_53_0_~p.base_BEFORE_CALL_5 1) v_func_to_recursive_line_37_to_53_0_~q.base_BEFORE_CALL_5 1) v_func_to_recursive_line_37_to_53_0_~r.base_BEFORE_CALL_5 1) v_func_to_recursive_line_37_to_53_0_~h.base_BEFORE_CALL_4) 0) (<= (+ |#StackHeapBarrier| 1) v_func_to_recursive_line_37_to_53_0_~p.base_BEFORE_CALL_5) (= (select |v_#length_20| 2) 13) (= (select |v_#valid_31| 0) 0) (= (select |v_#valid_31| 2) 1) (<= (+ |#StackHeapBarrier| 1) v_func_to_recursive_line_37_to_53_0_~h.base_BEFORE_CALL_4) (= (select |v_#valid_31| 1) 1) (<= (+ |#StackHeapBarrier| 1) v_func_to_recursive_line_37_to_53_0_~q.base_BEFORE_CALL_5) (<= (+ |#StackHeapBarrier| 1) v_func_to_recursive_line_37_to_53_0_~n.base_BEFORE_CALL_5) (= 2 (select |v_#length_20| 1)) (= (select (store |v_#valid_31| v_func_to_recursive_line_37_to_53_0_~n.base_BEFORE_CALL_5 1) v_func_to_recursive_line_37_to_53_0_~p.base_BEFORE_CALL_5) 0) (= (select |v_#length_20| 3) 12) (= (select |v_#valid_31| 3) 1) (= (select (store (store |v_#valid_31| v_func_to_recursive_line_37_to_53_0_~n.base_BEFORE_CALL_5 1) v_func_to_recursive_line_37_to_53_0_~p.base_BEFORE_CALL_5 1) v_func_to_recursive_line_37_to_53_0_~q.base_BEFORE_CALL_5) 0) (<= (+ |#StackHeapBarrier| 1) v_func_to_recursive_line_37_to_53_0_~r.base_BEFORE_CALL_5)))) (and (exists ((v_func_to_recursive_line_37_to_53_0_~r.base_BEFORE_CALL_4 Int) (v_func_to_recursive_line_37_to_53_0_~q.base_BEFORE_CALL_4 Int) (|v_#valid_31| (Array Int Int)) (v_func_to_recursive_line_37_to_53_0_~n.base_BEFORE_CALL_4 Int) (|v_func_to_recursive_line_37_to_53_0_#in~p.base_BEFORE_CALL_3| Int) (|v_#length_20| (Array Int Int)) (v_func_to_recursive_line_37_to_53_0_~h.base_BEFORE_CALL_3 Int)) (and (<= (+ |#StackHeapBarrier| 1) v_func_to_recursive_line_37_to_53_0_~h.base_BEFORE_CALL_3) (<= (+ |#StackHeapBarrier| 1) v_func_to_recursive_line_37_to_53_0_~r.base_BEFORE_CALL_4) (= (select |v_#length_20| 2) 13) (not (= (mod (+ (* (select (select |#memory_int| v_func_to_recursive_line_37_to_53_0_~q.base_BEFORE_CALL_4) 0) (select (select |#memory_int| v_func_to_recursive_line_37_to_53_0_~r.base_BEFORE_CALL_4) 0)) (* (select (select |#memory_int| |v_func_to_recursive_line_37_to_53_0_#in~p.base_BEFORE_CALL_3|) 0) (select (select |#memory_int| |v_func_to_recursive_line_37_to_53_0_#in~p.base_BEFORE_CALL_3|) 0))) 4294967296) (mod (* (select (select |#memory_int| v_func_to_recursive_line_37_to_53_0_~q.base_BEFORE_CALL_4) 0) (select (select |#memory_int| v_func_to_recursive_line_37_to_53_0_~n.base_BEFORE_CALL_4) 0)) 4294967296))) (<= (+ |#StackHeapBarrier| 1) |v_func_to_recursive_line_37_to_53_0_#in~p.base_BEFORE_CALL_3|) (= (select (store (store (store |v_#valid_31| v_func_to_recursive_line_37_to_53_0_~n.base_BEFORE_CALL_4 1) |v_func_to_recursive_line_37_to_53_0_#in~p.base_BEFORE_CALL_3| 1) v_func_to_recursive_line_37_to_53_0_~q.base_BEFORE_CALL_4 1) v_func_to_recursive_line_37_to_53_0_~r.base_BEFORE_CALL_4) 0) (= (select |v_#valid_31| 0) 0) (= (select |v_#valid_31| 2) 1) (= (select (store |v_#valid_31| v_func_to_recursive_line_37_to_53_0_~n.base_BEFORE_CALL_4 1) |v_func_to_recursive_line_37_to_53_0_#in~p.base_BEFORE_CALL_3|) 0) (= 0 (select (store (store (store (store |v_#valid_31| v_func_to_recursive_line_37_to_53_0_~n.base_BEFORE_CALL_4 1) |v_func_to_recursive_line_37_to_53_0_#in~p.base_BEFORE_CALL_3| 1) v_func_to_recursive_line_37_to_53_0_~q.base_BEFORE_CALL_4 1) v_func_to_recursive_line_37_to_53_0_~r.base_BEFORE_CALL_4 1) v_func_to_recursive_line_37_to_53_0_~h.base_BEFORE_CALL_3)) (= (select |v_#valid_31| 1) 1) (<= (+ |#StackHeapBarrier| 1) v_func_to_recursive_line_37_to_53_0_~n.base_BEFORE_CALL_4) (= (select |v_#valid_31| v_func_to_recursive_line_37_to_53_0_~n.base_BEFORE_CALL_4) 0) (= 2 (select |v_#length_20| 1)) (= (store (store (store (store (store |v_#valid_31| v_func_to_recursive_line_37_to_53_0_~n.base_BEFORE_CALL_4 1) |v_func_to_recursive_line_37_to_53_0_#in~p.base_BEFORE_CALL_3| 1) v_func_to_recursive_line_37_to_53_0_~q.base_BEFORE_CALL_4 1) v_func_to_recursive_line_37_to_53_0_~r.base_BEFORE_CALL_4 1) v_func_to_recursive_line_37_to_53_0_~h.base_BEFORE_CALL_3 1) |#valid|) (<= (+ (mod (select (select |#memory_int| v_func_to_recursive_line_37_to_53_0_~r.base_BEFORE_CALL_4) 0) 4294967296) 1) (mod (+ (select (select |#memory_int| v_func_to_recursive_line_37_to_53_0_~q.base_BEFORE_CALL_4) 0) (* (select (select |#memory_int| |v_func_to_recursive_line_37_to_53_0_#in~p.base_BEFORE_CALL_3|) 0) 2)) 4294967296)) (<= (+ |#StackHeapBarrier| 1) v_func_to_recursive_line_37_to_53_0_~q.base_BEFORE_CALL_4) (= (store (store (store (store (store |v_#length_20| v_func_to_recursive_line_37_to_53_0_~n.base_BEFORE_CALL_4 4) |v_func_to_recursive_line_37_to_53_0_#in~p.base_BEFORE_CALL_3| 4) v_func_to_recursive_line_37_to_53_0_~q.base_BEFORE_CALL_4 4) v_func_to_recursive_line_37_to_53_0_~r.base_BEFORE_CALL_4 4) v_func_to_recursive_line_37_to_53_0_~h.base_BEFORE_CALL_3 4) |#length|) (<= (+ (mod (select (select |#memory_int| v_func_to_recursive_line_37_to_53_0_~n.base_BEFORE_CALL_4) 0) 4294967296) 1) (mod (select (select |#memory_int| v_func_to_recursive_line_37_to_53_0_~q.base_BEFORE_CALL_4) 0) 4294967296)) (= (select |v_#length_20| 3) 12) (= (select (store (store |v_#valid_31| v_func_to_recursive_line_37_to_53_0_~n.base_BEFORE_CALL_4 1) |v_func_to_recursive_line_37_to_53_0_#in~p.base_BEFORE_CALL_3| 1) v_func_to_recursive_line_37_to_53_0_~q.base_BEFORE_CALL_4) 0) (= (select |v_#valid_31| 3) 1))) (exists ((|v_ULTIMATE.start_main_#t~nondet99#1_19| Int)) (<= (mod |v_ULTIMATE.start_main_#t~nondet99#1_19| 4294967296) 1073741822)) (exists ((|v_#memory_int_58| (Array Int (Array Int Int)))) (and (= (select (select |v_#memory_int_58| 1) 0) 48) (= (select (select |v_#memory_int_58| 1) 1) 0))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 17:32:20,110 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:32:20,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:32:20,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-12-02 17:32:20,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571949921] [2023-12-02 17:32:20,110 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:32:20,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 17:32:20,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:32:20,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 17:32:20,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=994, Unknown=6, NotChecked=0, Total=1122 [2023-12-02 17:32:20,113 INFO L87 Difference]: Start difference. First operand 65 states and 85 transitions. Second operand has 14 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 9 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 17:32:22,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:32:36,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:32:37,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:32:37,010 INFO L93 Difference]: Finished difference Result 88 states and 108 transitions. [2023-12-02 17:32:37,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 17:32:37,011 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 9 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-12-02 17:32:37,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:32:37,013 INFO L225 Difference]: With dead ends: 88 [2023-12-02 17:32:37,013 INFO L226 Difference]: Without dead ends: 86 [2023-12-02 17:32:37,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 415.7s TimeCoverageRelationStatistics Valid=238, Invalid=1736, Unknown=6, NotChecked=0, Total=1980 [2023-12-02 17:32:37,016 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 71 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 57 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:32:37,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 121 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 422 Invalid, 10 Unknown, 0 Unchecked, 13.8s Time] [2023-12-02 17:32:37,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-12-02 17:32:37,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2023-12-02 17:32:37,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 50 states have (on average 1.12) internal successors, (56), 53 states have internal predecessors, (56), 23 states have call successors, (23), 8 states have call predecessors, (23), 10 states have return successors, (26), 22 states have call predecessors, (26), 21 states have call successors, (26) [2023-12-02 17:32:37,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2023-12-02 17:32:37,043 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 20 [2023-12-02 17:32:37,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:32:37,044 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2023-12-02 17:32:37,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 9 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 17:32:37,044 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2023-12-02 17:32:37,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 17:32:37,045 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:32:37,045 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:32:37,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 17:32:37,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:32:37,247 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:32:37,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:32:37,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1676212313, now seen corresponding path program 1 times [2023-12-02 17:32:37,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:32:37,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753085473] [2023-12-02 17:32:37,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:32:37,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:32:37,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:32:39,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 17:32:39,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:32:39,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753085473] [2023-12-02 17:32:39,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753085473] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:32:39,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000433558] [2023-12-02 17:32:39,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:32:39,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:32:39,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:32:39,034 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:32:39,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 17:32:39,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:32:39,335 WARN L260 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 114 conjunts are in the unsatisfiable core [2023-12-02 17:32:39,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:32:39,366 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:32:39,367 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:32:39,384 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-12-02 17:32:39,390 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:32:39,391 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:32:39,394 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-12-02 17:32:39,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:32:39,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:32:39,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:32:39,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:32:39,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:32:39,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:32:39,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:32:39,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:32:39,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 323 treesize of output 33 [2023-12-02 17:32:39,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:32:39,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:32:39,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:32:39,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:32:39,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:32:39,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:32:39,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:32:39,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:32:39,458 INFO L349 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2023-12-02 17:32:39,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 29 [2023-12-02 17:32:39,483 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:32:39,483 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:32:39,486 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-12-02 17:32:39,737 INFO L349 Elim1Store]: treesize reduction 271, result has 28.5 percent of original size [2023-12-02 17:32:39,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 522 treesize of output 240 [2023-12-02 17:32:39,790 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:32:39,801 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:32:39,811 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2023-12-02 17:32:39,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 41 [2023-12-02 17:32:39,892 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:32:39,898 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:32:39,914 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:32:39,945 INFO L349 Elim1Store]: treesize reduction 79, result has 9.2 percent of original size [2023-12-02 17:32:39,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 8 case distinctions, treesize of input 82 treesize of output 61 [2023-12-02 17:32:39,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2023-12-02 17:32:40,106 INFO L349 Elim1Store]: treesize reduction 66, result has 38.3 percent of original size [2023-12-02 17:32:40,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 63 treesize of output 72 [2023-12-02 17:32:40,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2023-12-02 17:32:40,221 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:32:40,222 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:32:40,224 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:32:40,236 INFO L349 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2023-12-02 17:32:40,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 28 [2023-12-02 17:32:41,475 INFO L349 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2023-12-02 17:32:41,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 44 treesize of output 48 [2023-12-02 17:32:42,080 INFO L349 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2023-12-02 17:32:42,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 63 treesize of output 47 [2023-12-02 17:32:42,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 17:32:42,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:32:58,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000433558] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:32:58,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1172851685] [2023-12-02 17:32:58,998 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-12-02 17:32:58,998 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:32:58,999 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 17:32:59,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:32:59,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2023-12-02 17:32:59,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053178808] [2023-12-02 17:32:59,001 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:32:59,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 17:32:59,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:32:59,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 17:32:59,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=902, Unknown=7, NotChecked=0, Total=992 [2023-12-02 17:32:59,002 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 25 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 8 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 17:33:04,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 17:33:06,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:33:06,999 INFO L93 Difference]: Finished difference Result 117 states and 151 transitions. [2023-12-02 17:33:07,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 17:33:07,000 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 8 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 20 [2023-12-02 17:33:07,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:33:07,002 INFO L225 Difference]: With dead ends: 117 [2023-12-02 17:33:07,002 INFO L226 Difference]: Without dead ends: 115 [2023-12-02 17:33:07,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=207, Invalid=2138, Unknown=7, NotChecked=0, Total=2352 [2023-12-02 17:33:07,004 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 84 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 1588 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 1653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:33:07,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 234 Invalid, 1653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1588 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2023-12-02 17:33:07,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-12-02 17:33:07,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 108. [2023-12-02 17:33:07,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 64 states have (on average 1.109375) internal successors, (71), 67 states have internal predecessors, (71), 30 states have call successors, (30), 10 states have call predecessors, (30), 13 states have return successors, (36), 30 states have call predecessors, (36), 28 states have call successors, (36) [2023-12-02 17:33:07,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 137 transitions. [2023-12-02 17:33:07,041 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 137 transitions. Word has length 20 [2023-12-02 17:33:07,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:33:07,042 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 137 transitions. [2023-12-02 17:33:07,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 8 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 17:33:07,042 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 137 transitions. [2023-12-02 17:33:07,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 17:33:07,043 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:33:07,044 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:33:07,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 17:33:07,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:33:07,244 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:33:07,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:33:07,245 INFO L85 PathProgramCache]: Analyzing trace with hash 514193152, now seen corresponding path program 2 times [2023-12-02 17:33:07,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:33:07,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31306205] [2023-12-02 17:33:07,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:33:07,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:33:07,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:33:09,658 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 17:33:09,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:33:09,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31306205] [2023-12-02 17:33:09,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31306205] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:33:09,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543100529] [2023-12-02 17:33:09,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:33:09,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:33:09,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:33:09,660 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:33:09,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 17:33:10,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 17:33:10,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:33:10,113 WARN L260 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 136 conjunts are in the unsatisfiable core [2023-12-02 17:33:10,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:33:10,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:33:10,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:33:10,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:33:10,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:33:10,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:33:10,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:33:10,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:33:10,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:33:10,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 37 [2023-12-02 17:33:10,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:33:10,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:33:10,168 INFO L349 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2023-12-02 17:33:10,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 57 treesize of output 49 [2023-12-02 17:33:10,177 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 17:33:10,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 38 [2023-12-02 17:33:10,666 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-12-02 17:33:10,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 38 [2023-12-02 17:33:11,033 INFO L349 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2023-12-02 17:33:11,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 30 [2023-12-02 17:33:11,180 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 17:33:11,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:33:38,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543100529] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:33:38,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [588117445] [2023-12-02 17:33:38,726 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-12-02 17:33:38,726 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:33:38,726 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 17:33:38,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:33:38,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 29 [2023-12-02 17:33:38,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501786702] [2023-12-02 17:33:38,726 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:33:38,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-02 17:33:38,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:33:38,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-02 17:33:38,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1226, Unknown=7, NotChecked=0, Total=1332 [2023-12-02 17:33:38,728 INFO L87 Difference]: Start difference. First operand 108 states and 137 transitions. Second operand has 30 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 9 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 17:33:47,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:33:47,155 INFO L93 Difference]: Finished difference Result 147 states and 192 transitions. [2023-12-02 17:33:47,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-02 17:33:47,155 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 9 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 26 [2023-12-02 17:33:47,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:33:47,157 INFO L225 Difference]: With dead ends: 147 [2023-12-02 17:33:47,158 INFO L226 Difference]: Without dead ends: 145 [2023-12-02 17:33:47,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 30.5s TimeCoverageRelationStatistics Valid=273, Invalid=3142, Unknown=7, NotChecked=0, Total=3422 [2023-12-02 17:33:47,160 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 100 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 1766 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 1847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:33:47,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 307 Invalid, 1847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1766 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2023-12-02 17:33:47,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-12-02 17:33:47,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 110. [2023-12-02 17:33:47,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 65 states have (on average 1.1076923076923078) internal successors, (72), 68 states have internal predecessors, (72), 30 states have call successors, (30), 10 states have call predecessors, (30), 14 states have return successors, (38), 31 states have call predecessors, (38), 28 states have call successors, (38) [2023-12-02 17:33:47,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 140 transitions. [2023-12-02 17:33:47,202 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 140 transitions. Word has length 26 [2023-12-02 17:33:47,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:33:47,202 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 140 transitions. [2023-12-02 17:33:47,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 9 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 17:33:47,202 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 140 transitions. [2023-12-02 17:33:47,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 17:33:47,203 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:33:47,203 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:33:47,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 17:33:47,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:33:47,404 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:33:47,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:33:47,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1895648999, now seen corresponding path program 3 times [2023-12-02 17:33:47,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:33:47,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764802779] [2023-12-02 17:33:47,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:33:47,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:33:47,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:33:50,264 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 17:33:50,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:33:50,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764802779] [2023-12-02 17:33:50,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764802779] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:33:50,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757642054] [2023-12-02 17:33:50,265 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:33:50,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:33:50,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:33:50,266 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:33:50,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 17:33:50,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:33:50,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:33:50,410 WARN L260 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 148 conjunts are in the unsatisfiable core [2023-12-02 17:33:50,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:33:50,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:33:50,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:33:50,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:33:50,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:33:50,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:33:50,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:33:50,497 INFO L349 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2023-12-02 17:33:50,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 266 treesize of output 114 [2023-12-02 17:33:50,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:33:50,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:33:50,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:33:50,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:33:50,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:33:50,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:33:50,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:33:50,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:33:50,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:33:50,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:33:50,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:33:50,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:33:50,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:33:50,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:33:50,556 INFO L349 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-12-02 17:33:50,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 118 treesize of output 166 [2023-12-02 17:33:50,584 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-12-02 17:33:50,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 46 [2023-12-02 17:33:50,695 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:33:50,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 20 [2023-12-02 17:33:50,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-12-02 17:33:51,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:33:51,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:33:51,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:33:51,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:33:51,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:33:51,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:33:51,499 INFO L349 Elim1Store]: treesize reduction 44, result has 29.0 percent of original size [2023-12-02 17:33:51,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 207 treesize of output 199 [2023-12-02 17:33:51,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 95 [2023-12-02 17:33:51,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 93 [2023-12-02 17:33:51,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 91 [2023-12-02 17:33:51,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 89 [2023-12-02 17:33:52,093 INFO L349 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2023-12-02 17:33:52,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 87 treesize of output 75 [2023-12-02 17:33:52,260 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 17:33:52,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:33:53,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757642054] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:33:53,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1604544601] [2023-12-02 17:33:53,069 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-12-02 17:33:53,069 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:33:53,069 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 17:33:53,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:33:53,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14] total 32 [2023-12-02 17:33:53,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899209390] [2023-12-02 17:33:53,070 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:33:53,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-02 17:33:53,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:33:53,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-02 17:33:53,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1297, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 17:33:53,072 INFO L87 Difference]: Start difference. First operand 110 states and 140 transitions. Second operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 25 states have internal predecessors, (30), 10 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 17:33:59,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:33:59,907 INFO L93 Difference]: Finished difference Result 166 states and 219 transitions. [2023-12-02 17:33:59,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-02 17:33:59,908 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 25 states have internal predecessors, (30), 10 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 32 [2023-12-02 17:33:59,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:33:59,910 INFO L225 Difference]: With dead ends: 166 [2023-12-02 17:33:59,911 INFO L226 Difference]: Without dead ends: 164 [2023-12-02 17:33:59,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=283, Invalid=3139, Unknown=0, NotChecked=0, Total=3422 [2023-12-02 17:33:59,914 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 133 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 1408 mSolverCounterSat, 116 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 1537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1408 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:33:59,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 206 Invalid, 1537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1408 Invalid, 13 Unknown, 0 Unchecked, 4.6s Time] [2023-12-02 17:33:59,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2023-12-02 17:33:59,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 105. [2023-12-02 17:33:59,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 66 states have internal predecessors, (70), 29 states have call successors, (29), 10 states have call predecessors, (29), 12 states have return successors, (32), 28 states have call predecessors, (32), 27 states have call successors, (32) [2023-12-02 17:33:59,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 131 transitions. [2023-12-02 17:33:59,968 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 131 transitions. Word has length 32 [2023-12-02 17:33:59,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:33:59,968 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 131 transitions. [2023-12-02 17:33:59,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 25 states have internal predecessors, (30), 10 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 17:33:59,968 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 131 transitions. [2023-12-02 17:33:59,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 17:33:59,969 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:33:59,969 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:33:59,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-02 17:34:00,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:34:00,170 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:34:00,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:34:00,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1047185272, now seen corresponding path program 1 times [2023-12-02 17:34:00,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:34:00,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353641175] [2023-12-02 17:34:00,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:34:00,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:34:00,184 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:34:00,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1641185761] [2023-12-02 17:34:00,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:34:00,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:34:00,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:34:00,185 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:34:00,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 17:34:00,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:34:00,491 WARN L260 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 148 conjunts are in the unsatisfiable core [2023-12-02 17:34:00,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:34:00,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:34:00,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:34:00,560 INFO L349 Elim1Store]: treesize reduction 95, result has 31.7 percent of original size [2023-12-02 17:34:00,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 323 treesize of output 51 [2023-12-02 17:34:00,807 INFO L349 Elim1Store]: treesize reduction 271, result has 28.5 percent of original size [2023-12-02 17:34:00,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 522 treesize of output 240 [2023-12-02 17:34:00,870 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:34:00,871 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:34:00,877 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:34:00,879 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:34:00,891 INFO L349 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2023-12-02 17:34:00,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 86 treesize of output 63 [2023-12-02 17:34:01,056 INFO L349 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2023-12-02 17:34:01,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 17 case distinctions, treesize of input 86 treesize of output 95 [2023-12-02 17:34:01,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2023-12-02 17:34:02,017 INFO L349 Elim1Store]: treesize reduction 51, result has 39.3 percent of original size [2023-12-02 17:34:02,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 68 [2023-12-02 17:34:02,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-12-02 17:34:02,905 INFO L349 Elim1Store]: treesize reduction 271, result has 28.5 percent of original size [2023-12-02 17:34:02,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 522 treesize of output 240 [2023-12-02 17:34:02,989 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:34:02,990 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:34:02,997 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:34:02,998 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:34:03,013 INFO L349 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2023-12-02 17:34:03,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 11 case distinctions, treesize of input 86 treesize of output 63 [2023-12-02 17:34:03,153 INFO L349 Elim1Store]: treesize reduction 140, result has 19.1 percent of original size [2023-12-02 17:34:03,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 17 case distinctions, treesize of input 86 treesize of output 87 [2023-12-02 17:34:03,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2023-12-02 17:34:04,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 271 treesize of output 228 [2023-12-02 17:34:04,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2023-12-02 17:34:04,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:34:04,622 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:34:04,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:34:04,624 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:34:04,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 88 [2023-12-02 17:34:04,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:34:04,868 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:34:04,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:34:04,881 INFO L349 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2023-12-02 17:34:04,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 113 treesize of output 44 [2023-12-02 17:34:04,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2023-12-02 17:34:05,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:34:05,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:34:05,131 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:34:05,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:34:05,143 INFO L349 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2023-12-02 17:34:05,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 113 treesize of output 44 [2023-12-02 17:34:05,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2023-12-02 17:34:05,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:34:05,268 INFO L349 Elim1Store]: treesize reduction 39, result has 39.1 percent of original size [2023-12-02 17:34:05,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 67 treesize of output 60 [2023-12-02 17:34:05,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-12-02 17:34:05,453 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:34:05,538 INFO L349 Elim1Store]: treesize reduction 184, result has 27.3 percent of original size [2023-12-02 17:34:05,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 256 treesize of output 122 [2023-12-02 17:34:05,560 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:34:05,589 INFO L349 Elim1Store]: treesize reduction 39, result has 39.1 percent of original size [2023-12-02 17:34:05,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 56 [2023-12-02 17:34:05,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2023-12-02 17:34:06,177 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 17:34:06,228 INFO L349 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2023-12-02 17:34:06,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 123 treesize of output 41 [2023-12-02 17:34:06,295 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2023-12-02 17:34:06,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 53 [2023-12-02 17:34:07,578 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-12-02 17:34:07,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 33 [2023-12-02 17:34:07,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 17:34:07,708 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:34:17,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:34:17,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353641175] [2023-12-02 17:34:17,821 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:34:17,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641185761] [2023-12-02 17:34:17,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641185761] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:34:17,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2127249962] [2023-12-02 17:34:17,823 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-12-02 17:34:17,823 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:34:17,824 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:34:17,824 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:34:17,824 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:34:18,001 INFO L197 IcfgInterpreter]: Interpreting procedure func_to_recursive_line_29_to_33_0 with input of size 110 for LOIs [2023-12-02 17:34:18,114 INFO L197 IcfgInterpreter]: Interpreting procedure func_to_recursive_line_37_to_53_0 with input of size 106 for LOIs [2023-12-02 17:34:23,082 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2023-12-02 17:34:23,086 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:36:02,506 WARN L293 SmtUtils]: Spent 1.16m on a formula simplification. DAG size of input: 164 DAG size of output: 154 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:36:04,514 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse4 (select (select |c_#memory_int| c_func_to_recursive_line_37_to_53_0_~h.base) 0)) (.cse1 (select (select |c_#memory_int| c_func_to_recursive_line_37_to_53_0_~r.base) 0)) (.cse0 (select (select |c_#memory_int| c_func_to_recursive_line_37_to_53_0_~p.base) 0)) (.cse5 (select (select |c_#memory_int| c_func_to_recursive_line_37_to_53_0_~n.base) 0)) (.cse3 (+ |c_#StackHeapBarrier| 1)) (.cse2 (select (select |c_#memory_int| c_func_to_recursive_line_37_to_53_0_~q.base) 0))) (and (exists ((|v_#length_21| (Array Int Int))) (and (= (select |v_#length_21| 2) 13) (= 2 (select |v_#length_21| 1)) (= 12 (select |v_#length_21| 3)) (= (store (store (store (store (store |v_#length_21| |c_func_to_recursive_line_37_to_53_0_#in~n.base| 4) |c_func_to_recursive_line_37_to_53_0_#in~p.base| 4) |c_func_to_recursive_line_37_to_53_0_#in~q.base| 4) |c_func_to_recursive_line_37_to_53_0_#in~r.base| 4) |c_func_to_recursive_line_37_to_53_0_#in~h.base| 4) |c_#length|))) (= c_func_to_recursive_line_37_to_53_0_~r.offset 0) (= .cse0 |c_func_to_recursive_line_37_to_53_0_#t~mem20|) (= |c_func_to_recursive_line_37_to_53_0_#t~mem33| .cse1) (= |c_func_to_recursive_line_37_to_53_0_#in~h.offset| 0) (<= 2 |c_func_to_recursive_line_37_to_53_0_#in~r.base|) (<= 2 c_func_to_recursive_line_37_to_53_0_~h.base) (= c_func_to_recursive_line_37_to_53_0_~p.base |c_func_to_recursive_line_37_to_53_0_#in~p.base|) (= |c_func_to_recursive_line_37_to_53_0_#t~mem23| .cse2) (<= .cse3 |c_func_to_recursive_line_37_to_53_0_#in~r.base|) (<= 2 |c_func_to_recursive_line_37_to_53_0_#in~p.base|) (= |c_func_to_recursive_line_37_to_53_0_#t~mem28| .cse4) (<= 2 c_func_to_recursive_line_37_to_53_0_~p.base) (= c_func_to_recursive_line_37_to_53_0_~n.base |c_func_to_recursive_line_37_to_53_0_#in~n.base|) (<= 2 c_func_to_recursive_line_37_to_53_0_~n.base) (= |c_func_to_recursive_line_37_to_53_0_#in~q.offset| 0) (= |c_func_to_recursive_line_37_to_53_0_#t~mem26| .cse2) (<= 2 |c_func_to_recursive_line_37_to_53_0_#in~q.base|) (= .cse5 |c_func_to_recursive_line_37_to_53_0_#t~mem19|) (<= 1 |c_#StackHeapBarrier|) (<= (+ 1 (mod (select (select |c_old(#memory_int)| |c_func_to_recursive_line_37_to_53_0_#in~n.base|) 0) 4294967296)) (mod (select (select |c_old(#memory_int)| |c_func_to_recursive_line_37_to_53_0_#in~q.base|) 0) 4294967296)) (= |c_func_to_recursive_line_37_to_53_0_#t~mem29| .cse2) (= c_func_to_recursive_line_37_to_53_0_~n.offset 0) (= |c_func_to_recursive_line_37_to_53_0_#in~n.offset| 0) (= .cse0 |c_func_to_recursive_line_37_to_53_0_#t~mem25|) (= .cse4 |c_func_to_recursive_line_37_to_53_0_#t~mem14|) (= c_func_to_recursive_line_37_to_53_0_~h.offset 0) (= |c_old(#memory_int)| |c_#memory_int|) (exists ((|v_#valid_36| (Array Int Int))) (let ((.cse7 (store |v_#valid_36| |c_func_to_recursive_line_37_to_53_0_#in~n.base| 1))) (let ((.cse8 (store .cse7 |c_func_to_recursive_line_37_to_53_0_#in~p.base| 1))) (let ((.cse9 (store .cse8 |c_func_to_recursive_line_37_to_53_0_#in~q.base| 1))) (let ((.cse6 (store .cse9 |c_func_to_recursive_line_37_to_53_0_#in~r.base| 1))) (and (= (select |v_#valid_36| |c_func_to_recursive_line_37_to_53_0_#in~n.base|) 0) (= (select |v_#valid_36| 1) 1) (= (select |v_#valid_36| 2) 1) (= (select |v_#valid_36| 0) 0) (= (select |v_#valid_36| 3) 1) (= (select .cse6 |c_func_to_recursive_line_37_to_53_0_#in~h.base|) 0) (= |c_#valid| (store .cse6 |c_func_to_recursive_line_37_to_53_0_#in~h.base| 1)) (= (select .cse7 |c_func_to_recursive_line_37_to_53_0_#in~p.base|) 0) (= (select .cse8 |c_func_to_recursive_line_37_to_53_0_#in~q.base|) 0) (= (select .cse9 |c_func_to_recursive_line_37_to_53_0_#in~r.base|) 0))))))) (<= 2 |c_func_to_recursive_line_37_to_53_0_#in~h.base|) (= .cse1 |c_func_to_recursive_line_37_to_53_0_#t~mem30|) (= .cse4 |c_func_to_recursive_line_37_to_53_0_#t~mem13|) (= |c_func_to_recursive_line_37_to_53_0_#t~mem27| .cse2) (= |c_func_to_recursive_line_37_to_53_0_#in~p.offset| 0) (<= 2 c_func_to_recursive_line_37_to_53_0_~q.base) (exists ((|v_ULTIMATE.start_main_#t~nondet99#1_19| Int)) (<= (mod |v_ULTIMATE.start_main_#t~nondet99#1_19| 4294967296) 1073741822)) (<= .cse3 |c_func_to_recursive_line_37_to_53_0_#in~n.base|) (= |c_func_to_recursive_line_37_to_53_0_#t~mem32| .cse2) (= |c_func_to_recursive_line_37_to_53_0_#t~mem16| .cse4) (= c_func_to_recursive_line_37_to_53_0_~p.offset 0) (= .cse4 |c_func_to_recursive_line_37_to_53_0_#t~mem22|) (<= .cse3 |c_func_to_recursive_line_37_to_53_0_#in~p.base|) (= .cse0 |c_func_to_recursive_line_37_to_53_0_#t~mem31|) (= (mod (* .cse5 .cse2) 4294967296) (mod (+ (* .cse0 .cse0) (* .cse1 .cse2)) 4294967296)) (<= .cse3 |c_func_to_recursive_line_37_to_53_0_#in~q.base|) (= |c_func_to_recursive_line_37_to_53_0_#t~mem18| .cse2) (= |c_func_to_recursive_line_37_to_53_0_#t~mem15| .cse4) (<= 2 c_func_to_recursive_line_37_to_53_0_~r.base) (= |c_func_to_recursive_line_37_to_53_0_#in~r.base| c_func_to_recursive_line_37_to_53_0_~r.base) (<= (+ (mod .cse1 4294967296) 1) (mod (+ (* .cse0 2) .cse2) 4294967296)) (exists ((|v_#memory_int_131| (Array Int (Array Int Int)))) (let ((.cse10 (select |v_#memory_int_131| 1))) (and (= (select .cse10 0) 48) (= (select .cse10 1) 0)))) (= c_func_to_recursive_line_37_to_53_0_~q.offset 0) (= |c_func_to_recursive_line_37_to_53_0_#in~r.offset| 0) (= .cse5 |c_func_to_recursive_line_37_to_53_0_#t~mem17|) (<= .cse3 |c_func_to_recursive_line_37_to_53_0_#in~h.base|) (= c_func_to_recursive_line_37_to_53_0_~q.base |c_func_to_recursive_line_37_to_53_0_#in~q.base|) (= c_func_to_recursive_line_37_to_53_0_~h.base |c_func_to_recursive_line_37_to_53_0_#in~h.base|) (<= 2 |c_func_to_recursive_line_37_to_53_0_#in~n.base|) (= |c_func_to_recursive_line_37_to_53_0_#t~mem21| .cse2) (= |c_func_to_recursive_line_37_to_53_0_#t~mem24| .cse2))) is different from false [2023-12-02 17:36:04,518 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2479#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 17:36:04,519 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:36:04,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:36:04,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-12-02 17:36:04,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119396600] [2023-12-02 17:36:04,519 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:36:04,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 17:36:04,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:36:04,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 17:36:04,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=864, Unknown=8, NotChecked=60, Total=1056 [2023-12-02 17:36:04,520 INFO L87 Difference]: Start difference. First operand 105 states and 131 transitions. Second operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 17:36:06,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:36:13,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:36:16,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:36:23,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:36:26,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:36:30,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:36:33,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:36:33,457 INFO L93 Difference]: Finished difference Result 113 states and 137 transitions. [2023-12-02 17:36:33,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 17:36:33,458 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2023-12-02 17:36:33,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:36:33,459 INFO L225 Difference]: With dead ends: 113 [2023-12-02 17:36:33,459 INFO L226 Difference]: Without dead ends: 111 [2023-12-02 17:36:33,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 112.6s TimeCoverageRelationStatistics Valid=197, Invalid=1358, Unknown=9, NotChecked=76, Total=1640 [2023-12-02 17:36:33,461 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 67 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 52 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:36:33,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 111 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 369 Invalid, 14 Unknown, 0 Unchecked, 23.8s Time] [2023-12-02 17:36:33,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-12-02 17:36:33,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2023-12-02 17:36:33,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 66 states have (on average 1.106060606060606) internal successors, (73), 69 states have internal predecessors, (73), 29 states have call successors, (29), 11 states have call predecessors, (29), 13 states have return successors, (32), 28 states have call predecessors, (32), 27 states have call successors, (32) [2023-12-02 17:36:33,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 134 transitions. [2023-12-02 17:36:33,499 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 134 transitions. Word has length 26 [2023-12-02 17:36:33,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:36:33,500 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 134 transitions. [2023-12-02 17:36:33,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 17:36:33,500 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 134 transitions. [2023-12-02 17:36:33,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 17:36:33,501 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:36:33,501 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:36:33,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 17:36:33,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:36:33,702 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:36:33,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:36:33,702 INFO L85 PathProgramCache]: Analyzing trace with hash -658245147, now seen corresponding path program 1 times [2023-12-02 17:36:33,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:36:33,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294698157] [2023-12-02 17:36:33,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:36:33,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:36:33,717 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:36:33,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512825231] [2023-12-02 17:36:33,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:36:33,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:36:33,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:36:33,718 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:36:33,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 17:36:34,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:36:34,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 101 conjunts are in the unsatisfiable core [2023-12-02 17:36:34,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:36:34,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:34,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 44 [2023-12-02 17:36:34,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:34,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:34,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:34,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:34,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:34,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:34,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:34,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:34,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:34,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:34,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:34,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:34,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2023-12-02 17:36:34,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-12-02 17:36:34,119 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2023-12-02 17:36:34,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 53 [2023-12-02 17:36:34,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 28 [2023-12-02 17:36:34,781 INFO L349 Elim1Store]: treesize reduction 14, result has 90.3 percent of original size [2023-12-02 17:36:34,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 74 treesize of output 160 [2023-12-02 17:36:36,084 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 17:36:36,084 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:36:38,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:36:38,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294698157] [2023-12-02 17:36:38,674 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:36:38,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512825231] [2023-12-02 17:36:38,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512825231] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:36:38,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1359979959] [2023-12-02 17:36:38,676 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 17:36:38,676 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:36:38,676 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 17:36:38,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:36:38,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-12-02 17:36:38,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437670569] [2023-12-02 17:36:38,677 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:36:38,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 17:36:38,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:36:38,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 17:36:38,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2023-12-02 17:36:38,678 INFO L87 Difference]: Start difference. First operand 109 states and 134 transitions. Second operand has 18 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 17:36:41,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:36:44,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:36:44,759 INFO L93 Difference]: Finished difference Result 127 states and 152 transitions. [2023-12-02 17:36:44,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 17:36:44,759 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2023-12-02 17:36:44,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:36:44,761 INFO L225 Difference]: With dead ends: 127 [2023-12-02 17:36:44,761 INFO L226 Difference]: Without dead ends: 125 [2023-12-02 17:36:44,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 17:36:44,762 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 125 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 99 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:36:44,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 111 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 486 Invalid, 12 Unknown, 0 Unchecked, 4.1s Time] [2023-12-02 17:36:44,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-12-02 17:36:44,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2023-12-02 17:36:44,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 75 states have (on average 1.1066666666666667) internal successors, (83), 78 states have internal predecessors, (83), 32 states have call successors, (32), 13 states have call predecessors, (32), 15 states have return successors, (34), 31 states have call predecessors, (34), 29 states have call successors, (34) [2023-12-02 17:36:44,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 149 transitions. [2023-12-02 17:36:44,809 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 149 transitions. Word has length 26 [2023-12-02 17:36:44,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:36:44,809 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 149 transitions. [2023-12-02 17:36:44,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 17:36:44,809 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 149 transitions. [2023-12-02 17:36:44,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 17:36:44,810 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:36:44,810 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:36:44,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 17:36:45,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:36:45,011 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:36:45,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:36:45,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1852658480, now seen corresponding path program 1 times [2023-12-02 17:36:45,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:36:45,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534302192] [2023-12-02 17:36:45,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:36:45,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:36:45,024 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:36:45,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [45817276] [2023-12-02 17:36:45,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:36:45,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:36:45,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:36:45,025 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:36:45,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f1bd7d8-3d63-4d46-a87c-5434b5b82a66/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 17:36:45,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:36:45,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 125 conjunts are in the unsatisfiable core [2023-12-02 17:36:45,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:36:45,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:45,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:45,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:45,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:45,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:45,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:45,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:45,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:45,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:45,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:45,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:45,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:45,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:45,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:45,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:45,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 80 [2023-12-02 17:36:45,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:45,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:45,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:45,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:45,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:45,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:45,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:45,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:45,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:45,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:45,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 77 [2023-12-02 17:36:45,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 201 treesize of output 182 [2023-12-02 17:36:45,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 1 [2023-12-02 17:36:45,270 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2023-12-02 17:36:45,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 53 [2023-12-02 17:36:50,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:50,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:50,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:50,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:50,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:50,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:50,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:50,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:50,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:50,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:50,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:50,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:50,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:50,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:50,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:50,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:50,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:50,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:50,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:50,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:50,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:50,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:50,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:50,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:50,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:50,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:50,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:50,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:50,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:50,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:50,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:50,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:50,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:50,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:50,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 17:36:51,952 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:36:51,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 18 select indices, 18 select index equivalence classes, 46 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 135 case distinctions, treesize of input 290 treesize of output 1286 [2023-12-02 17:36:52,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 215 treesize of output 152 [2023-12-02 17:36:52,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 155 [2023-12-02 17:36:52,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 150 [2023-12-02 17:36:52,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 213 treesize of output 145 [2023-12-02 17:36:53,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 208 treesize of output 140 [2023-12-02 17:36:53,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 138 [2023-12-02 17:36:53,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 175 treesize of output 135 [2023-12-02 17:36:53,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 172 treesize of output 132 [2023-12-02 17:36:53,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 129 [2023-12-02 17:36:53,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 118 [2023-12-02 17:37:02,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-12-02 17:37:09,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7