./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/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_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/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_ce7e6975-8add-4b7d-9b04-ec941766d44f/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 014459ae7f9a4506b7655fe1f167856eb64829e3739070f7d1f854e4ecd5b5bc --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 18:42:55,796 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 18:42:55,860 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 18:42:55,864 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 18:42:55,865 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 18:42:55,885 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 18:42:55,885 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 18:42:55,885 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 18:42:55,886 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 18:42:55,887 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 18:42:55,887 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 18:42:55,888 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 18:42:55,888 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 18:42:55,889 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 18:42:55,889 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 18:42:55,890 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 18:42:55,890 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 18:42:55,891 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 18:42:55,891 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 18:42:55,892 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 18:42:55,892 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 18:42:55,896 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 18:42:55,897 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 18:42:55,897 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 18:42:55,897 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 18:42:55,898 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 18:42:55,898 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 18:42:55,898 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 18:42:55,898 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 18:42:55,899 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 18:42:55,899 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 18:42:55,900 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 18:42:55,900 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 18:42:55,900 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 18:42:55,900 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 18:42:55,901 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 18:42:55,901 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 18:42:55,901 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:42:55,901 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 18:42:55,901 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 18:42:55,901 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 18:42:55,902 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 18:42:55,902 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 18:42:55,902 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 18:42:55,902 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 18:42:55,903 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 18:42:55,903 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 18:42:55,903 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_ce7e6975-8add-4b7d-9b04-ec941766d44f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 014459ae7f9a4506b7655fe1f167856eb64829e3739070f7d1f854e4ecd5b5bc [2023-12-02 18:42:56,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 18:42:56,124 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 18:42:56,127 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 18:42:56,128 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 18:42:56,128 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 18:42:56,130 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound20.c [2023-12-02 18:42:59,089 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 18:42:59,247 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 18:42:59,248 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound20.c [2023-12-02 18:42:59,255 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/data/7211b17dd/ef2aab0aa55e4ee68593b0dde93da60e/FLAG7b239db1b [2023-12-02 18:42:59,267 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/data/7211b17dd/ef2aab0aa55e4ee68593b0dde93da60e [2023-12-02 18:42:59,269 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 18:42:59,270 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 18:42:59,271 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 18:42:59,271 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 18:42:59,276 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 18:42:59,276 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:42:59" (1/1) ... [2023-12-02 18:42:59,278 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14c37f11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:42:59, skipping insertion in model container [2023-12-02 18:42:59,278 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:42:59" (1/1) ... [2023-12-02 18:42:59,296 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 18:42:59,414 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_ce7e6975-8add-4b7d-9b04-ec941766d44f/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound20.c[576,589] [2023-12-02 18:42:59,429 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:42:59,438 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 18:42:59,448 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_ce7e6975-8add-4b7d-9b04-ec941766d44f/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound20.c[576,589] [2023-12-02 18:42:59,455 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:42:59,466 INFO L206 MainTranslator]: Completed translation [2023-12-02 18:42:59,467 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:42:59 WrapperNode [2023-12-02 18:42:59,467 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 18:42:59,468 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 18:42:59,468 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 18:42:59,468 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 18:42:59,473 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:42:59" (1/1) ... [2023-12-02 18:42:59,479 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:42:59" (1/1) ... [2023-12-02 18:42:59,494 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 57 [2023-12-02 18:42:59,495 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 18:42:59,495 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 18:42:59,495 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 18:42:59,496 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 18:42:59,502 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:42:59" (1/1) ... [2023-12-02 18:42:59,503 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:42:59" (1/1) ... [2023-12-02 18:42:59,504 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:42:59" (1/1) ... [2023-12-02 18:42:59,504 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:42:59" (1/1) ... [2023-12-02 18:42:59,508 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:42:59" (1/1) ... [2023-12-02 18:42:59,512 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:42:59" (1/1) ... [2023-12-02 18:42:59,513 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:42:59" (1/1) ... [2023-12-02 18:42:59,514 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:42:59" (1/1) ... [2023-12-02 18:42:59,515 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 18:42:59,516 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 18:42:59,517 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 18:42:59,517 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 18:42:59,518 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:42:59" (1/1) ... [2023-12-02 18:42:59,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:42:59,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:42:59,550 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 18:42:59,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 18:42:59,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 18:42:59,590 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 18:42:59,590 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 18:42:59,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 18:42:59,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 18:42:59,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 18:42:59,591 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 18:42:59,591 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 18:42:59,661 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 18:42:59,663 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 18:42:59,794 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 18:42:59,825 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 18:42:59,825 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 18:42:59,827 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:42:59 BoogieIcfgContainer [2023-12-02 18:42:59,827 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 18:42:59,830 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 18:42:59,830 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 18:42:59,833 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 18:42:59,833 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 06:42:59" (1/3) ... [2023-12-02 18:42:59,834 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39006ab5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:42:59, skipping insertion in model container [2023-12-02 18:42:59,834 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:42:59" (2/3) ... [2023-12-02 18:42:59,835 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39006ab5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:42:59, skipping insertion in model container [2023-12-02 18:42:59,835 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:42:59" (3/3) ... [2023-12-02 18:42:59,836 INFO L112 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_valuebound20.c [2023-12-02 18:42:59,855 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 18:42:59,855 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 18:42:59,901 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 18:42:59,908 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;@766e32a6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 18:42:59,908 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 18:42:59,912 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 18:42:59,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 18:42:59,920 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:42:59,920 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:42:59,921 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:42:59,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:42:59,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1646389938, now seen corresponding path program 1 times [2023-12-02 18:42:59,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:42:59,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316584201] [2023-12-02 18:42:59,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:42:59,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:43:00,041 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:43:00,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2133701156] [2023-12-02 18:43:00,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:00,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:43:00,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:43:00,044 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:43:00,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 18:43:00,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:00,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 18:43:00,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:43:00,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:43:00,299 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:43:00,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:43:00,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316584201] [2023-12-02 18:43:00,300 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 18:43:00,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133701156] [2023-12-02 18:43:00,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133701156] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:43:00,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:43:00,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 18:43:00,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423545986] [2023-12-02 18:43:00,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:43:00,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 18:43:00,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:43:00,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 18:43:00,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:43:00,348 INFO L87 Difference]: Start difference. First operand has 29 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 18:43:00,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:43:00,492 INFO L93 Difference]: Finished difference Result 60 states and 97 transitions. [2023-12-02 18:43:00,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 18:43:00,496 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 17 [2023-12-02 18:43:00,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:43:00,503 INFO L225 Difference]: With dead ends: 60 [2023-12-02 18:43:00,504 INFO L226 Difference]: Without dead ends: 36 [2023-12-02 18:43:00,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:43:00,511 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 16 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:43:00,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 126 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:43:00,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-12-02 18:43:00,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2023-12-02 18:43:00,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 18:43:00,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2023-12-02 18:43:00,549 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 17 [2023-12-02 18:43:00,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:43:00,550 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2023-12-02 18:43:00,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 18:43:00,550 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2023-12-02 18:43:00,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 18:43:00,551 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:43:00,552 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:43:00,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 18:43:00,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:43:00,752 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:43:00,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:43:00,753 INFO L85 PathProgramCache]: Analyzing trace with hash -849077806, now seen corresponding path program 1 times [2023-12-02 18:43:00,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:43:00,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933804474] [2023-12-02 18:43:00,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:00,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:43:00,770 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:43:00,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [262001914] [2023-12-02 18:43:00,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:00,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:43:00,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:43:00,772 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:43:00,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 18:43:00,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:00,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 18:43:00,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:43:00,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:43:00,965 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:43:01,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:43:01,075 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:43:01,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933804474] [2023-12-02 18:43:01,076 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 18:43:01,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262001914] [2023-12-02 18:43:01,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262001914] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 18:43:01,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:43:01,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 12 [2023-12-02 18:43:01,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440811649] [2023-12-02 18:43:01,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:43:01,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:43:01,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:43:01,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:43:01,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-12-02 18:43:01,080 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 18:43:01,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:43:01,153 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2023-12-02 18:43:01,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:43:01,153 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 22 [2023-12-02 18:43:01,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:43:01,155 INFO L225 Difference]: With dead ends: 50 [2023-12-02 18:43:01,155 INFO L226 Difference]: Without dead ends: 47 [2023-12-02 18:43:01,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-12-02 18:43:01,157 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 10 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:43:01,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 98 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:43:01,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-12-02 18:43:01,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2023-12-02 18:43:01,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-12-02 18:43:01,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2023-12-02 18:43:01,173 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 22 [2023-12-02 18:43:01,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:43:01,174 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2023-12-02 18:43:01,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 18:43:01,174 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2023-12-02 18:43:01,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 18:43:01,175 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:43:01,175 INFO L195 NwaCegarLoop]: trace histogram [3, 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 18:43:01,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 18:43:01,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:43:01,377 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:43:01,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:43:01,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1967169097, now seen corresponding path program 1 times [2023-12-02 18:43:01,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:43:01,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156768628] [2023-12-02 18:43:01,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:01,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:43:01,393 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:43:01,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1158697602] [2023-12-02 18:43:01,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:01,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:43:01,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:43:01,395 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:43:01,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 18:43:01,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:01,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 18:43:01,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:43:01,501 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 18:43:01,501 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:43:01,557 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 18:43:01,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:43:01,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156768628] [2023-12-02 18:43:01,558 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 18:43:01,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158697602] [2023-12-02 18:43:01,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158697602] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 18:43:01,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:43:01,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2023-12-02 18:43:01,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818550311] [2023-12-02 18:43:01,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:43:01,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:43:01,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:43:01,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:43:01,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:43:01,560 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-02 18:43:01,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:43:01,633 INFO L93 Difference]: Finished difference Result 52 states and 65 transitions. [2023-12-02 18:43:01,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:43:01,634 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 29 [2023-12-02 18:43:01,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:43:01,635 INFO L225 Difference]: With dead ends: 52 [2023-12-02 18:43:01,635 INFO L226 Difference]: Without dead ends: 50 [2023-12-02 18:43:01,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-12-02 18:43:01,637 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 11 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:43:01,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 80 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:43:01,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-12-02 18:43:01,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-12-02 18:43:01,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-12-02 18:43:01,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2023-12-02 18:43:01,657 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 29 [2023-12-02 18:43:01,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:43:01,657 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2023-12-02 18:43:01,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-02 18:43:01,658 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2023-12-02 18:43:01,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 18:43:01,659 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:43:01,659 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 1, 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 18:43:01,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 18:43:01,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:43:01,864 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:43:01,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:43:01,865 INFO L85 PathProgramCache]: Analyzing trace with hash 927902903, now seen corresponding path program 1 times [2023-12-02 18:43:01,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:43:01,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291376148] [2023-12-02 18:43:01,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:01,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:43:01,882 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:43:01,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2077552914] [2023-12-02 18:43:01,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:01,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:43:01,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:43:01,884 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:43:01,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 18:43:01,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:01,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 18:43:01,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:43:02,000 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 18:43:02,000 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:43:02,000 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:43:02,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291376148] [2023-12-02 18:43:02,000 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 18:43:02,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077552914] [2023-12-02 18:43:02,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077552914] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:43:02,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:43:02,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 18:43:02,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117248995] [2023-12-02 18:43:02,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:43:02,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:43:02,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:43:02,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:43:02,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:43:02,003 INFO L87 Difference]: Start difference. First operand 50 states and 63 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-02 18:43:02,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:43:02,112 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2023-12-02 18:43:02,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 18:43:02,112 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 39 [2023-12-02 18:43:02,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:43:02,114 INFO L225 Difference]: With dead ends: 56 [2023-12-02 18:43:02,114 INFO L226 Difference]: Without dead ends: 54 [2023-12-02 18:43:02,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:43:02,115 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 15 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:43:02,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 124 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:43:02,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-12-02 18:43:02,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-12-02 18:43:02,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-12-02 18:43:02,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2023-12-02 18:43:02,130 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 39 [2023-12-02 18:43:02,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:43:02,131 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2023-12-02 18:43:02,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-02 18:43:02,131 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2023-12-02 18:43:02,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 18:43:02,133 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:43:02,133 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 1, 1, 1, 1, 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 18:43:02,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 18:43:02,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:43:02,338 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:43:02,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:43:02,339 INFO L85 PathProgramCache]: Analyzing trace with hash 794028461, now seen corresponding path program 1 times [2023-12-02 18:43:02,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:43:02,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775631891] [2023-12-02 18:43:02,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:02,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:43:02,352 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:43:02,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1159811264] [2023-12-02 18:43:02,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:02,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:43:02,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:43:02,354 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:43:02,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 18:43:02,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:02,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 18:43:02,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:43:02,468 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-02 18:43:02,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:43:02,568 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-02 18:43:02,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:43:02,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775631891] [2023-12-02 18:43:02,569 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 18:43:02,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159811264] [2023-12-02 18:43:02,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159811264] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:43:02,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [880186072] [2023-12-02 18:43:02,590 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-12-02 18:43:02,591 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:43:02,594 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:43:02,600 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:43:02,600 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:43:03,565 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2023-12-02 18:43:03,577 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 18:43:03,579 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:43:04,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [880186072] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:43:04,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:43:04,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [8, 7] total 23 [2023-12-02 18:43:04,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418816284] [2023-12-02 18:43:04,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:43:04,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 18:43:04,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:43:04,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 18:43:04,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2023-12-02 18:43:04,492 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 14 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 18:43:04,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:43:04,717 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2023-12-02 18:43:04,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 18:43:04,717 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 45 [2023-12-02 18:43:04,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:43:04,719 INFO L225 Difference]: With dead ends: 80 [2023-12-02 18:43:04,719 INFO L226 Difference]: Without dead ends: 78 [2023-12-02 18:43:04,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 106 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2023-12-02 18:43:04,721 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:43:04,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 42 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:43:04,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-12-02 18:43:04,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2023-12-02 18:43:04,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 47 states have internal predecessors, (50), 20 states have call successors, (20), 10 states have call predecessors, (20), 10 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2023-12-02 18:43:04,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2023-12-02 18:43:04,742 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 45 [2023-12-02 18:43:04,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:43:04,742 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2023-12-02 18:43:04,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 18:43:04,742 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2023-12-02 18:43:04,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-02 18:43:04,744 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:43:04,745 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 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 18:43:04,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 18:43:04,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:43:04,949 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:43:04,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:43:04,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1669435945, now seen corresponding path program 1 times [2023-12-02 18:43:04,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:43:04,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470896014] [2023-12-02 18:43:04,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:04,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:43:04,961 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:43:04,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [916839308] [2023-12-02 18:43:04,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:04,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:43:04,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:43:04,963 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:43:04,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 18:43:05,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:05,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 18:43:05,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:43:05,256 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-12-02 18:43:05,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:43:05,451 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-02 18:43:05,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:43:05,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470896014] [2023-12-02 18:43:05,451 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 18:43:05,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916839308] [2023-12-02 18:43:05,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916839308] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 18:43:05,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:43:05,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2023-12-02 18:43:05,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67319965] [2023-12-02 18:43:05,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:43:05,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 18:43:05,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:43:05,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 18:43:05,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-12-02 18:43:05,454 INFO L87 Difference]: Start difference. First operand 76 states and 89 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-12-02 18:43:05,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:43:05,682 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2023-12-02 18:43:05,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:43:05,683 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 52 [2023-12-02 18:43:05,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:43:05,685 INFO L225 Difference]: With dead ends: 82 [2023-12-02 18:43:05,685 INFO L226 Difference]: Without dead ends: 79 [2023-12-02 18:43:05,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2023-12-02 18:43:05,687 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 19 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:43:05,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 106 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:43:05,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-12-02 18:43:05,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-12-02 18:43:05,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 49 states have internal predecessors, (52), 19 states have call successors, (19), 11 states have call predecessors, (19), 11 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2023-12-02 18:43:05,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2023-12-02 18:43:05,708 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 52 [2023-12-02 18:43:05,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:43:05,709 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2023-12-02 18:43:05,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-12-02 18:43:05,709 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2023-12-02 18:43:05,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-02 18:43:05,712 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:43:05,712 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:43:05,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 18:43:05,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:43:05,913 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:43:05,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:43:05,913 INFO L85 PathProgramCache]: Analyzing trace with hash 903485255, now seen corresponding path program 1 times [2023-12-02 18:43:05,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:43:05,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938367779] [2023-12-02 18:43:05,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:05,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:43:05,924 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 18:43:05,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1014491887] [2023-12-02 18:43:05,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:05,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:43:05,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:43:05,925 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:43:05,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 18:43:05,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:05,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 18:43:05,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:43:06,028 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2023-12-02 18:43:06,028 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:43:06,113 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2023-12-02 18:43:06,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:43:06,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938367779] [2023-12-02 18:43:06,114 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 18:43:06,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014491887] [2023-12-02 18:43:06,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014491887] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:43:06,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1515845854] [2023-12-02 18:43:06,117 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 18:43:06,118 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:43:06,118 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:43:06,118 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:43:06,118 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:43:07,591 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2023-12-02 18:43:07,595 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-12-02 18:43:07,596 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:43:08,508 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2616#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 18:43:08,508 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:43:08,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:43:08,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2023-12-02 18:43:08,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069810762] [2023-12-02 18:43:08,509 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 18:43:08,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 18:43:08,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:43:08,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 18:43:08,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2023-12-02 18:43:08,511 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 18:43:08,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:43:08,613 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2023-12-02 18:43:08,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 18:43:08,613 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 68 [2023-12-02 18:43:08,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:43:08,614 INFO L225 Difference]: With dead ends: 79 [2023-12-02 18:43:08,614 INFO L226 Difference]: Without dead ends: 0 [2023-12-02 18:43:08,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 173 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2023-12-02 18:43:08,616 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 20 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:43:08,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 89 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:43:08,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-02 18:43:08,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-02 18:43:08,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:43:08,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-02 18:43:08,617 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 68 [2023-12-02 18:43:08,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:43:08,617 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-02 18:43:08,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 18:43:08,617 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-02 18:43:08,617 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-02 18:43:08,620 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-02 18:43:08,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 18:43:08,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:43:08,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-02 18:43:10,250 INFO L899 garLoopResultBuilder]: For program point L64(line 64) no Hoare annotation was computed. [2023-12-02 18:43:10,250 INFO L899 garLoopResultBuilder]: For program point L31(line 31) no Hoare annotation was computed. [2023-12-02 18:43:10,251 INFO L895 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (and (= (select |#length| 3) 12) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= 14 (select |#length| 2)) (= (select |#valid| 2) 1) (= (select .cse0 0) 48) (= (select .cse0 1) 0))) [2023-12-02 18:43:10,251 INFO L899 garLoopResultBuilder]: For program point L27-1(line 27) no Hoare annotation was computed. [2023-12-02 18:43:10,251 INFO L895 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~y~0#1|)) (.cse1 (select |#memory_int| 1))) (and (= (select |#length| 3) 12) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~x~0#1| (+ |ULTIMATE.start_main_~r~0#1| .cse0)) (<= 1 |ULTIMATE.start_main_~y~0#1|) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select |#valid| 1) 1) (<= 1 |ULTIMATE.start_main_~r~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 20) (= (select |#valid| 0) 0) (= 14 (select |#length| 2)) (= (select |#valid| 2) 1) (= (select .cse1 0) 48) (= (+ |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~x~0#1|) (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|) |ULTIMATE.start_main_~r~0#1| .cse0)) (<= |ULTIMATE.start_main_~x~0#1| 20) (= (select .cse1 1) 0))) [2023-12-02 18:43:10,252 INFO L895 garLoopResultBuilder]: At program point L48-1(line 48) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~y~0#1|)) (.cse1 (select |#memory_int| 1))) (and (= (select |#length| 3) 12) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~x~0#1| (+ |ULTIMATE.start_main_~r~0#1| .cse0)) (<= 1 |ULTIMATE.start_main_~y~0#1|) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select |#valid| 1) 1) (<= 1 |ULTIMATE.start_main_~r~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 20) (= (select |#valid| 0) 0) (= 14 (select |#length| 2)) (= (select |#valid| 2) 1) (= (select .cse1 0) 48) (= (+ |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~x~0#1|) (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|) |ULTIMATE.start_main_~r~0#1| .cse0)) (<= |ULTIMATE.start_main_~x~0#1| 20) (= (select .cse1 1) 0))) [2023-12-02 18:43:10,252 INFO L899 garLoopResultBuilder]: For program point L40(lines 38 62) no Hoare annotation was computed. [2023-12-02 18:43:10,252 INFO L895 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~y~0#1|)) (.cse1 (select |#memory_int| 1))) (and (= (select |#length| 3) 12) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~x~0#1| (+ |ULTIMATE.start_main_~r~0#1| .cse0)) (<= 1 |ULTIMATE.start_main_~y~0#1|) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select |#valid| 1) 1) (<= 1 |ULTIMATE.start_main_~r~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 20) (= (select |#valid| 0) 0) (= 14 (select |#length| 2)) (= (select |#valid| 2) 1) (= (select .cse1 0) 48) (= (+ |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~x~0#1|) (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|) |ULTIMATE.start_main_~r~0#1| .cse0)) (<= |ULTIMATE.start_main_~x~0#1| 20) (= (select .cse1 1) 0))) [2023-12-02 18:43:10,252 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-12-02 18:43:10,253 INFO L895 garLoopResultBuilder]: At program point L29(line 29) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (and (= (select |#length| 3) 12) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= 14 (select |#length| 2)) (<= 0 (+ |ULTIMATE.start_main_~y~0#1| 2147483648)) (= (select |#valid| 2) 1) (= (select .cse0 0) 48) (<= |ULTIMATE.start_main_~y~0#1| 2147483647) (<= |ULTIMATE.start_main_~x~0#1| 20) (= (select .cse0 1) 0))) [2023-12-02 18:43:10,253 INFO L895 garLoopResultBuilder]: At program point L29-1(line 29) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (and (= (select |#length| 3) 12) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select |#valid| 1) 1) (<= |ULTIMATE.start_main_~y~0#1| 20) (= (select |#valid| 0) 0) (= 14 (select |#length| 2)) (= (select |#valid| 2) 1) (= (select .cse0 0) 48) (<= |ULTIMATE.start_main_~x~0#1| 20) (= (select .cse0 1) 0))) [2023-12-02 18:43:10,253 INFO L899 garLoopResultBuilder]: For program point L50(lines 47 59) no Hoare annotation was computed. [2023-12-02 18:43:10,253 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-12-02 18:43:10,253 INFO L895 garLoopResultBuilder]: At program point L38-2(lines 38 62) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~y~0#1|)) (.cse1 (select |#memory_int| 1))) (and (= (select |#length| 3) 12) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~x~0#1| (+ |ULTIMATE.start_main_~r~0#1| .cse0)) (<= 1 |ULTIMATE.start_main_~y~0#1|) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select |#valid| 1) 1) (<= |ULTIMATE.start_main_~y~0#1| 20) (= (select |#valid| 0) 0) (= 14 (select |#length| 2)) (= (select |#valid| 2) 1) (= (select .cse1 0) 48) (= (+ |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~x~0#1|) (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|) |ULTIMATE.start_main_~r~0#1| .cse0)) (<= |ULTIMATE.start_main_~x~0#1| 20) (= (select .cse1 1) 0))) [2023-12-02 18:43:10,254 INFO L895 garLoopResultBuilder]: At program point L38-3(lines 38 62) the Hoare annotation is: (and (= |ULTIMATE.start_main_~x~0#1| (+ |ULTIMATE.start_main_~r~0#1| (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~y~0#1|))) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 20)) [2023-12-02 18:43:10,254 INFO L895 garLoopResultBuilder]: At program point L55(line 55) the Hoare annotation is: (let ((.cse1 (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|)) (.cse0 (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~y~0#1|)) (.cse2 (select |#memory_int| 1))) (and (= (select |#length| 3) 12) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~x~0#1| (+ |ULTIMATE.start_main_~r~0#1| .cse0)) (<= 1 |ULTIMATE.start_main_~y~0#1|) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select |#valid| 1) 1) (<= 1 |ULTIMATE.start_main_~r~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 20) (= (select |#valid| 0) 0) (= 14 (select |#length| 2)) (= (select |#valid| 2) 1) (<= (* .cse1 2) |ULTIMATE.start_main_~r~0#1|) (= (select .cse2 0) 48) (= (+ |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~x~0#1|) (+ .cse1 |ULTIMATE.start_main_~r~0#1| .cse0)) (<= |ULTIMATE.start_main_~x~0#1| 20) (= (select .cse2 1) 0))) [2023-12-02 18:43:10,254 INFO L899 garLoopResultBuilder]: For program point L55-1(line 55) no Hoare annotation was computed. [2023-12-02 18:43:10,254 INFO L895 garLoopResultBuilder]: At program point L47-2(lines 47 59) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~y~0#1|)) (.cse1 (select |#memory_int| 1))) (and (= (select |#length| 3) 12) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~x~0#1| (+ |ULTIMATE.start_main_~r~0#1| .cse0)) (<= 1 |ULTIMATE.start_main_~y~0#1|) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select |#valid| 1) 1) (<= 1 |ULTIMATE.start_main_~r~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 20) (= (select |#valid| 0) 0) (= 14 (select |#length| 2)) (= (select |#valid| 2) 1) (= (select .cse1 0) 48) (= (+ |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~x~0#1|) (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|) |ULTIMATE.start_main_~r~0#1| .cse0)) (<= |ULTIMATE.start_main_~x~0#1| 20) (= (select .cse1 1) 0))) [2023-12-02 18:43:10,254 INFO L899 garLoopResultBuilder]: For program point L47-3(lines 47 59) no Hoare annotation was computed. [2023-12-02 18:43:10,255 INFO L895 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~y~0#1|)) (.cse1 (select |#memory_int| 1))) (and (= (select |#length| 3) 12) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~x~0#1| (+ |ULTIMATE.start_main_~r~0#1| .cse0)) (<= 1 |ULTIMATE.start_main_~y~0#1|) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select |#valid| 1) 1) (<= |ULTIMATE.start_main_~y~0#1| 20) (= (select |#valid| 0) 0) (= 14 (select |#length| 2)) (= (select |#valid| 2) 1) (= (select .cse1 0) 48) (= (+ |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~x~0#1|) (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|) |ULTIMATE.start_main_~r~0#1| .cse0)) (<= |ULTIMATE.start_main_~x~0#1| 20) (= (select .cse1 1) 0))) [2023-12-02 18:43:10,255 INFO L895 garLoopResultBuilder]: At program point L39-1(line 39) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~y~0#1|)) (.cse1 (select |#memory_int| 1))) (and (= (select |#length| 3) 12) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~x~0#1| (+ |ULTIMATE.start_main_~r~0#1| .cse0)) (<= 1 |ULTIMATE.start_main_~y~0#1|) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select |#valid| 1) 1) (<= |ULTIMATE.start_main_~y~0#1| 20) (= (select |#valid| 0) 0) (= 14 (select |#length| 2)) (= (select |#valid| 2) 1) (= (select .cse1 0) 48) (= (+ |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~x~0#1|) (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|) |ULTIMATE.start_main_~r~0#1| .cse0)) (<= |ULTIMATE.start_main_~x~0#1| 20) (= (select .cse1 1) 0))) [2023-12-02 18:43:10,255 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 11 13) the Hoare annotation is: true [2023-12-02 18:43:10,255 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2023-12-02 18:43:10,255 INFO L899 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2023-12-02 18:43:10,255 INFO L899 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2023-12-02 18:43:10,256 INFO L899 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2023-12-02 18:43:10,256 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2023-12-02 18:43:10,256 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 14 20) the Hoare annotation is: true [2023-12-02 18:43:10,256 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2023-12-02 18:43:10,259 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:43:10,261 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 18:43:10,269 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #length[3] could not be translated [2023-12-02 18:43:10,271 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #length[1] could not be translated [2023-12-02 18:43:10,272 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #valid[3] could not be translated [2023-12-02 18:43:10,272 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #valid[1] could not be translated [2023-12-02 18:43:10,272 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #valid[0] could not be translated [2023-12-02 18:43:10,272 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #length[2] could not be translated [2023-12-02 18:43:10,272 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #valid[2] could not be translated [2023-12-02 18:43:10,272 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #memory_int[1][0] could not be translated [2023-12-02 18:43:10,273 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #memory_int[1][1] could not be translated [2023-12-02 18:43:10,274 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #length[3] could not be translated [2023-12-02 18:43:10,274 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #length[1] could not be translated [2023-12-02 18:43:10,274 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #valid[3] could not be translated [2023-12-02 18:43:10,274 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #valid[1] could not be translated [2023-12-02 18:43:10,274 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #valid[0] could not be translated [2023-12-02 18:43:10,274 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #length[2] could not be translated [2023-12-02 18:43:10,274 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #valid[2] could not be translated [2023-12-02 18:43:10,275 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #memory_int[1][0] could not be translated [2023-12-02 18:43:10,275 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #memory_int[1][1] could not be translated [2023-12-02 18:43:10,275 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 06:43:10 BoogieIcfgContainer [2023-12-02 18:43:10,275 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 18:43:10,276 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 18:43:10,276 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 18:43:10,276 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 18:43:10,276 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:42:59" (3/4) ... [2023-12-02 18:43:10,278 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-12-02 18:43:10,280 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2023-12-02 18:43:10,280 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2023-12-02 18:43:10,284 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2023-12-02 18:43:10,284 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2023-12-02 18:43:10,284 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-12-02 18:43:10,285 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-12-02 18:43:10,358 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/witness.graphml [2023-12-02 18:43:10,358 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/witness.yml [2023-12-02 18:43:10,359 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 18:43:10,359 INFO L158 Benchmark]: Toolchain (without parser) took 11089.16ms. Allocated memory was 169.9MB in the beginning and 247.5MB in the end (delta: 77.6MB). Free memory was 129.2MB in the beginning and 147.7MB in the end (delta: -18.6MB). Peak memory consumption was 60.8MB. Max. memory is 16.1GB. [2023-12-02 18:43:10,360 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 117.4MB. Free memory is still 66.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 18:43:10,360 INFO L158 Benchmark]: CACSL2BoogieTranslator took 195.67ms. Allocated memory is still 169.9MB. Free memory was 129.2MB in the beginning and 118.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-12-02 18:43:10,361 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.19ms. Allocated memory is still 169.9MB. Free memory was 118.7MB in the beginning and 117.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 18:43:10,361 INFO L158 Benchmark]: Boogie Preprocessor took 20.30ms. Allocated memory is still 169.9MB. Free memory was 117.3MB in the beginning and 115.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 18:43:10,361 INFO L158 Benchmark]: RCFGBuilder took 310.32ms. Allocated memory is still 169.9MB. Free memory was 115.9MB in the beginning and 103.3MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-12-02 18:43:10,362 INFO L158 Benchmark]: TraceAbstraction took 10445.55ms. Allocated memory was 169.9MB in the beginning and 247.5MB in the end (delta: 77.6MB). Free memory was 102.6MB in the beginning and 151.9MB in the end (delta: -49.3MB). Peak memory consumption was 111.1MB. Max. memory is 16.1GB. [2023-12-02 18:43:10,362 INFO L158 Benchmark]: Witness Printer took 82.86ms. Allocated memory is still 247.5MB. Free memory was 151.9MB in the beginning and 147.7MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-12-02 18:43:10,364 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 117.4MB. Free memory is still 66.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 195.67ms. Allocated memory is still 169.9MB. Free memory was 129.2MB in the beginning and 118.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.19ms. Allocated memory is still 169.9MB. Free memory was 118.7MB in the beginning and 117.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 20.30ms. Allocated memory is still 169.9MB. Free memory was 117.3MB in the beginning and 115.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 310.32ms. Allocated memory is still 169.9MB. Free memory was 115.9MB in the beginning and 103.3MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 10445.55ms. Allocated memory was 169.9MB in the beginning and 247.5MB in the end (delta: 77.6MB). Free memory was 102.6MB in the beginning and 151.9MB in the end (delta: -49.3MB). Peak memory consumption was 111.1MB. Max. memory is 16.1GB. * Witness Printer took 82.86ms. Allocated memory is still 247.5MB. Free memory was 151.9MB in the beginning and 147.7MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: ArrayAccessExpression #length[3] could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: ArrayAccessExpression #length[1] could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: ArrayAccessExpression #valid[3] could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: ArrayAccessExpression #valid[1] could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: ArrayAccessExpression #valid[0] could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: ArrayAccessExpression #length[2] could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: ArrayAccessExpression #valid[2] could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: ArrayAccessExpression #memory_int[1][0] could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: ArrayAccessExpression #memory_int[1][1] could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: ArrayAccessExpression #length[3] could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: ArrayAccessExpression #length[1] could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: ArrayAccessExpression #valid[3] could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: ArrayAccessExpression #valid[1] could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: ArrayAccessExpression #valid[0] could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: ArrayAccessExpression #length[2] could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: ArrayAccessExpression #valid[2] could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: ArrayAccessExpression #memory_int[1][0] could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: ArrayAccessExpression #memory_int[1][1] could not be translated * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 10.4s, OverallIterations: 7, TraceHistogramMax: 10, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 160 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 130 mSDsluCounter, 665 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 505 mSDsCounter, 85 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 561 IncrementalHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 85 mSolverCounterUnsat, 160 mSDtfsCounter, 561 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 599 GetRequests, 491 SyntacticMatches, 10 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=79occurred in iteration=6, InterpolantAutomatonStates: 55, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 6 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 14 LocationsWithAnnotation, 40 PreInvPairs, 58 NumberOfFragments, 903 HoareAnnotationTreeSize, 40 FomulaSimplifications, 250 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 14 FomulaSimplificationsInter, 1130 FormulaSimplificationTreeSizeReductionInter, 1.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 272 NumberOfCodeBlocks, 272 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 476 ConstructedInterpolants, 0 QuantifiedInterpolants, 1224 SizeOfPredicates, 31 NumberOfNonLiveVariables, 756 ConjunctsInSsa, 121 ConjunctsInUnsatCore, 12 InterpolantComputations, 5 PerfectInterpolantSequences, 677/710 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 1.0s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 3, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 29, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 16, TOOLS_POST_TIME: 0.1s, TOOLS_POST_CALL_APPLICATIONS: 25, TOOLS_POST_CALL_TIME: 0.4s, TOOLS_POST_RETURN_APPLICATIONS: 16, TOOLS_POST_RETURN_TIME: 0.2s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 57, TOOLS_QUANTIFIERELIM_TIME: 0.6s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 70, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 31, DOMAIN_JOIN_TIME: 0.2s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 29, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 16, CALL_SUMMARIZER_CACHE_MISSES: 2, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 412, DAG_COMPRESSION_RETAINED_NODES: 74, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: (((((((0 <= x) && (x == (r + (q * y)))) && (1 <= y)) && (1 <= r)) && (y <= 20)) && ((b + x) == (((a * y) + r) + (q * y)))) && (x <= 20)) - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: ((((((0 <= x) && (x == (r + (q * y)))) && (1 <= y)) && (y <= 20)) && ((b + x) == (((a * y) + r) + (q * y)))) && (x <= 20)) RESULT: Ultimate proved your program to be correct! [2023-12-02 18:43:10,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce7e6975-8add-4b7d-9b04-ec941766d44f/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE