./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/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_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/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_9d0969fe-4361-4615-bc09-455db766256f/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 f7372e141bce7d93eac34ddc01970d0d3ee3e3dd05571cb5550acbf38c8c76e9 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 16:52:56,017 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 16:52:56,079 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 16:52:56,084 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 16:52:56,084 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 16:52:56,108 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 16:52:56,109 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 16:52:56,110 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 16:52:56,110 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 16:52:56,111 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 16:52:56,111 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 16:52:56,112 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 16:52:56,112 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 16:52:56,113 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 16:52:56,113 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 16:52:56,114 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 16:52:56,114 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 16:52:56,115 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 16:52:56,115 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 16:52:56,116 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 16:52:56,116 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 16:52:56,117 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 16:52:56,118 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 16:52:56,118 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 16:52:56,118 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 16:52:56,119 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 16:52:56,119 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 16:52:56,120 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 16:52:56,120 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 16:52:56,120 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 16:52:56,121 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 16:52:56,121 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 16:52:56,122 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 16:52:56,122 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 16:52:56,122 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 16:52:56,122 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 16:52:56,123 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 16:52:56,123 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:52:56,123 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 16:52:56,123 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 16:52:56,123 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 16:52:56,125 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 16:52:56,125 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 16:52:56,125 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 16:52:56,125 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 16:52:56,126 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 16:52:56,126 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 16:52:56,126 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_9d0969fe-4361-4615-bc09-455db766256f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f7372e141bce7d93eac34ddc01970d0d3ee3e3dd05571cb5550acbf38c8c76e9 [2023-12-02 16:52:56,343 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 16:52:56,364 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 16:52:56,367 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 16:52:56,368 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 16:52:56,369 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 16:52:56,370 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound5.i [2023-12-02 16:52:59,148 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 16:52:59,302 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 16:52:59,303 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound5.i [2023-12-02 16:52:59,310 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/data/64f923cc7/ece7ee6d0c534b00b74853274d366465/FLAG00c296a45 [2023-12-02 16:52:59,321 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/data/64f923cc7/ece7ee6d0c534b00b74853274d366465 [2023-12-02 16:52:59,324 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 16:52:59,325 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 16:52:59,326 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 16:52:59,326 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 16:52:59,331 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 16:52:59,331 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:52:59" (1/1) ... [2023-12-02 16:52:59,332 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e977497 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:52:59, skipping insertion in model container [2023-12-02 16:52:59,333 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:52:59" (1/1) ... [2023-12-02 16:52:59,360 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 16:52:59,502 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_9d0969fe-4361-4615-bc09-455db766256f/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound5.i[951,964] [2023-12-02 16:52:59,515 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:52:59,523 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 16:52:59,537 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_9d0969fe-4361-4615-bc09-455db766256f/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound5.i[951,964] [2023-12-02 16:52:59,542 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:52:59,555 INFO L206 MainTranslator]: Completed translation [2023-12-02 16:52:59,556 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:52:59 WrapperNode [2023-12-02 16:52:59,556 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 16:52:59,557 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 16:52:59,557 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 16:52:59,557 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 16:52:59,565 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:52:59" (1/1) ... [2023-12-02 16:52:59,571 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:52:59" (1/1) ... [2023-12-02 16:52:59,590 INFO L138 Inliner]: procedures = 16, calls = 9, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 46 [2023-12-02 16:52:59,590 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 16:52:59,591 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 16:52:59,591 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 16:52:59,591 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 16:52:59,600 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:52:59" (1/1) ... [2023-12-02 16:52:59,600 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:52:59" (1/1) ... [2023-12-02 16:52:59,601 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:52:59" (1/1) ... [2023-12-02 16:52:59,601 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:52:59" (1/1) ... [2023-12-02 16:52:59,604 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:52:59" (1/1) ... [2023-12-02 16:52:59,608 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:52:59" (1/1) ... [2023-12-02 16:52:59,609 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:52:59" (1/1) ... [2023-12-02 16:52:59,610 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:52:59" (1/1) ... [2023-12-02 16:52:59,611 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 16:52:59,612 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 16:52:59,612 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 16:52:59,613 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 16:52:59,613 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:52:59" (1/1) ... [2023-12-02 16:52:59,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:52:59,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:52:59,646 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 16:52:59,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 16:52:59,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 16:52:59,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 16:52:59,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 16:52:59,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 16:52:59,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 16:52:59,685 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 16:52:59,737 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 16:52:59,739 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 16:52:59,845 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 16:52:59,900 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 16:52:59,901 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 16:52:59,902 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:52:59 BoogieIcfgContainer [2023-12-02 16:52:59,902 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 16:52:59,905 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 16:52:59,905 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 16:52:59,909 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 16:52:59,909 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:52:59" (1/3) ... [2023-12-02 16:52:59,910 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33637c8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:52:59, skipping insertion in model container [2023-12-02 16:52:59,910 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:52:59" (2/3) ... [2023-12-02 16:52:59,910 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33637c8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:52:59, skipping insertion in model container [2023-12-02 16:52:59,911 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:52:59" (3/3) ... [2023-12-02 16:52:59,912 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound5.i [2023-12-02 16:52:59,925 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 16:52:59,926 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 16:52:59,965 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 16:52:59,970 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;@215d21b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 16:52:59,971 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 16:52:59,974 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 16:52:59,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 16:52:59,979 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:52:59,980 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:52:59,980 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:52:59,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:52:59,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1881233236, now seen corresponding path program 1 times [2023-12-02 16:52:59,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:52:59,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958460782] [2023-12-02 16:52:59,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:52:59,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:53:00,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:53:00,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:53:00,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958460782] [2023-12-02 16:53:00,112 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-02 16:53:00,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774398421] [2023-12-02 16:53:00,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:53:00,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:53:00,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:53:00,116 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:53:00,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 16:53:00,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:53:00,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-02 16:53:00,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:53:00,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:53:00,203 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:53:00,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774398421] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:53:00,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:53:00,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 16:53:00,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050996645] [2023-12-02 16:53:00,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:53:00,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 16:53:00,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:53:00,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 16:53:00,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 16:53:00,236 INFO L87 Difference]: Start difference. First operand has 15 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:53:00,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:53:00,263 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2023-12-02 16:53:00,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 16:53:00,265 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 16:53:00,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:53:00,272 INFO L225 Difference]: With dead ends: 27 [2023-12-02 16:53:00,272 INFO L226 Difference]: Without dead ends: 13 [2023-12-02 16:53:00,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 16:53:00,279 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:53:00,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 16:53:00,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-12-02 16:53:00,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-12-02 16:53:00,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 16:53:00,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-12-02 16:53:00,315 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2023-12-02 16:53:00,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:53:00,315 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-12-02 16:53:00,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:53:00,315 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-12-02 16:53:00,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 16:53:00,316 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:53:00,316 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:53:00,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 16:53:00,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-02 16:53:00,520 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:53:00,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:53:00,521 INFO L85 PathProgramCache]: Analyzing trace with hash -515868340, now seen corresponding path program 1 times [2023-12-02 16:53:00,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:53:00,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671973703] [2023-12-02 16:53:00,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:53:00,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:53:00,545 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:53:00,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1928000597] [2023-12-02 16:53:00,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:53:00,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:53:00,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:53:00,548 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:53:00,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 16:53:00,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:53:00,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 16:53:00,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:53:00,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:53:00,759 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:53:00,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:53:00,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671973703] [2023-12-02 16:53:00,760 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:53:00,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928000597] [2023-12-02 16:53:00,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928000597] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:53:00,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:53:00,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:53:00,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049363869] [2023-12-02 16:53:00,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:53:00,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:53:00,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:53:00,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:53:00,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:53:00,764 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:53:00,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:53:00,828 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2023-12-02 16:53:00,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:53:00,829 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-12-02 16:53:00,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:53:00,830 INFO L225 Difference]: With dead ends: 25 [2023-12-02 16:53:00,830 INFO L226 Difference]: Without dead ends: 22 [2023-12-02 16:53:00,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:53:00,832 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 6 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:53:00,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 35 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 16:53:00,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-02 16:53:00,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-12-02 16:53:00,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 16:53:00,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-12-02 16:53:00,841 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 8 [2023-12-02 16:53:00,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:53:00,841 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-12-02 16:53:00,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:53:00,841 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-12-02 16:53:00,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 16:53:00,842 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:53:00,842 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:53:00,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 16:53:01,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:53:01,043 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:53:01,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:53:01,044 INFO L85 PathProgramCache]: Analyzing trace with hash -965242393, now seen corresponding path program 1 times [2023-12-02 16:53:01,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:53:01,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311548943] [2023-12-02 16:53:01,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:53:01,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:53:01,054 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:53:01,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1044972057] [2023-12-02 16:53:01,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:53:01,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:53:01,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:53:01,056 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:53:01,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 16:53:01,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:53:01,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 16:53:01,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:53:01,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:53:01,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:53:01,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:53:01,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:53:01,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311548943] [2023-12-02 16:53:01,577 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:53:01,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044972057] [2023-12-02 16:53:01,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044972057] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:53:01,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [763398598] [2023-12-02 16:53:01,596 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 16:53:01,596 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:53:01,600 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:53:01,605 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:53:01,605 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:53:01,861 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 24 for LOIs [2023-12-02 16:53:01,886 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:53:02,287 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '253#(and (exists ((|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_3| Int)) (and (<= (+ (mod |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_3| 4294967296) 1) (mod |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_3| 4294967296)) (not (= (mod |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_3| 4294967296) (mod |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_3| 4294967296))))) (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 16:53:02,287 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:53:02,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 16:53:02,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-12-02 16:53:02,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818626440] [2023-12-02 16:53:02,288 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 16:53:02,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 16:53:02,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:53:02,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 16:53:02,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2023-12-02 16:53:02,290 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:53:06,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 16:53:07,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:53:07,559 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2023-12-02 16:53:07,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 16:53:07,560 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-02 16:53:07,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:53:07,561 INFO L225 Difference]: With dead ends: 46 [2023-12-02 16:53:07,561 INFO L226 Difference]: Without dead ends: 42 [2023-12-02 16:53:07,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-12-02 16:53:07,563 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 19 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:53:07,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 57 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 75 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2023-12-02 16:53:07,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-12-02 16:53:07,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2023-12-02 16:53:07,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.25) internal successors, (35), 30 states have internal predecessors, (35), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 16:53:07,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2023-12-02 16:53:07,579 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 10 [2023-12-02 16:53:07,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:53:07,579 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2023-12-02 16:53:07,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:53:07,580 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2023-12-02 16:53:07,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 16:53:07,581 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:53:07,581 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:53:07,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 16:53:07,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:53:07,787 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:53:07,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:53:07,787 INFO L85 PathProgramCache]: Analyzing trace with hash -2086061256, now seen corresponding path program 2 times [2023-12-02 16:53:07,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:53:07,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401694214] [2023-12-02 16:53:07,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:53:07,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:53:07,802 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:53:07,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1492874262] [2023-12-02 16:53:07,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 16:53:07,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:53:07,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:53:07,804 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:53:07,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 16:53:07,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-12-02 16:53:07,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:53:07,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 16:53:07,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:53:07,957 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 16:53:07,958 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:53:07,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:53:07,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401694214] [2023-12-02 16:53:07,958 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:53:07,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492874262] [2023-12-02 16:53:07,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492874262] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:53:07,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:53:07,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:53:07,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291476426] [2023-12-02 16:53:07,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:53:07,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:53:07,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:53:07,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:53:07,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:53:07,960 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:53:08,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:53:08,010 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2023-12-02 16:53:08,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:53:08,011 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-12-02 16:53:08,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:53:08,013 INFO L225 Difference]: With dead ends: 54 [2023-12-02 16:53:08,013 INFO L226 Difference]: Without dead ends: 51 [2023-12-02 16:53:08,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:53:08,015 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 6 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:53:08,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 30 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 16:53:08,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-12-02 16:53:08,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2023-12-02 16:53:08,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 32 states have (on average 1.21875) internal successors, (39), 35 states have internal predecessors, (39), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 16:53:08,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2023-12-02 16:53:08,029 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 16 [2023-12-02 16:53:08,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:53:08,029 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2023-12-02 16:53:08,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:53:08,030 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2023-12-02 16:53:08,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 16:53:08,031 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:53:08,031 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:53:08,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 16:53:08,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:53:08,232 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:53:08,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:53:08,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1168188275, now seen corresponding path program 1 times [2023-12-02 16:53:08,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:53:08,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786609420] [2023-12-02 16:53:08,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:53:08,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:53:08,244 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:53:08,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [747972011] [2023-12-02 16:53:08,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:53:08,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:53:08,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:53:08,246 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:53:08,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 16:53:08,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:53:08,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 16:53:08,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:53:08,569 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:53:08,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:53:15,267 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:53:15,267 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:53:15,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786609420] [2023-12-02 16:53:15,268 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:53:15,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747972011] [2023-12-02 16:53:15,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747972011] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:53:15,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [837219702] [2023-12-02 16:53:15,270 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-12-02 16:53:15,270 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:53:15,271 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:53:15,271 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:53:15,271 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:53:15,888 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 24 for LOIs [2023-12-02 16:53:15,923 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:53:20,203 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '702#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_16| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_16| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_16| Int) (|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_16| Int)) (not (= (mod (+ (* |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_16| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_16|) |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_16|) 4294967296) (mod |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_16| 4294967296)))))' at error location [2023-12-02 16:53:20,203 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:53:20,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 16:53:20,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-12-02 16:53:20,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007546091] [2023-12-02 16:53:20,203 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 16:53:20,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 16:53:20,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:53:20,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 16:53:20,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=508, Unknown=1, NotChecked=0, Total=600 [2023-12-02 16:53:20,205 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 14 states have internal predecessors, (28), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 16:53:38,875 WARN L293 SmtUtils]: Spent 16.90s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:53:40,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 16:53:42,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 16:53:48,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 16:54:00,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:54:00,638 INFO L93 Difference]: Finished difference Result 82 states and 99 transitions. [2023-12-02 16:54:00,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 16:54:00,638 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 14 states have internal predecessors, (28), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-12-02 16:54:00,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:54:00,640 INFO L225 Difference]: With dead ends: 82 [2023-12-02 16:54:00,640 INFO L226 Difference]: Without dead ends: 77 [2023-12-02 16:54:00,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 36.1s TimeCoverageRelationStatistics Valid=143, Invalid=726, Unknown=1, NotChecked=0, Total=870 [2023-12-02 16:54:00,641 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 37 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 27 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2023-12-02 16:54:00,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 143 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 180 Invalid, 1 Unknown, 0 Unchecked, 13.7s Time] [2023-12-02 16:54:00,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-12-02 16:54:00,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 50. [2023-12-02 16:54:00,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.236842105263158) internal successors, (47), 41 states have internal predecessors, (47), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 16:54:00,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2023-12-02 16:54:00,664 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 19 [2023-12-02 16:54:00,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:54:00,664 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2023-12-02 16:54:00,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 14 states have internal predecessors, (28), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 16:54:00,665 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2023-12-02 16:54:00,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 16:54:00,665 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:54:00,665 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-12-02 16:54:00,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 16:54:00,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:54:00,866 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:54:00,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:54:00,867 INFO L85 PathProgramCache]: Analyzing trace with hash 687309511, now seen corresponding path program 2 times [2023-12-02 16:54:00,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:54:00,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286801678] [2023-12-02 16:54:00,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:54:00,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:54:00,874 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:54:00,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1875780191] [2023-12-02 16:54:00,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 16:54:00,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:54:00,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:54:00,875 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:54:00,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 16:54:16,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 16:54:16,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:54:16,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-02 16:54:16,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:54:16,283 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 16:54:16,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:54:58,995 WARN L293 SmtUtils]: Spent 11.40s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:54:58,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:54:58,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286801678] [2023-12-02 16:54:58,999 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:54:58,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875780191] [2023-12-02 16:54:59,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875780191] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:54:59,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1130634384] [2023-12-02 16:54:59,001 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-12-02 16:54:59,002 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:54:59,002 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:54:59,002 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:54:59,002 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:54:59,330 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 24 for LOIs [2023-12-02 16:54:59,344 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:55:20,576 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1043#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_29| Int) (|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_29| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_29| Int) (|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_28| Int)) (not (= (mod |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_29| 4294967296) (mod (+ (* |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_29| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_28|) |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_29|) 4294967296)))))' at error location [2023-12-02 16:55:20,577 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:55:20,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:55:20,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-12-02 16:55:20,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938862348] [2023-12-02 16:55:20,577 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 16:55:20,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 16:55:20,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:55:20,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 16:55:20,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=420, Unknown=11, NotChecked=0, Total=506 [2023-12-02 16:55:20,579 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 16:55:24,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 16:55:26,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 16:55:27,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:55:27,045 INFO L93 Difference]: Finished difference Result 79 states and 93 transitions. [2023-12-02 16:55:27,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 16:55:27,045 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2023-12-02 16:55:27,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:55:27,046 INFO L225 Difference]: With dead ends: 79 [2023-12-02 16:55:27,046 INFO L226 Difference]: Without dead ends: 44 [2023-12-02 16:55:27,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 51.6s TimeCoverageRelationStatistics Valid=81, Invalid=459, Unknown=12, NotChecked=0, Total=552 [2023-12-02 16:55:27,048 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:55:27,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 59 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2023-12-02 16:55:27,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-02 16:55:27,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-12-02 16:55:27,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 36 states have internal predecessors, (41), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 16:55:27,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2023-12-02 16:55:27,066 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 24 [2023-12-02 16:55:27,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:55:27,066 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2023-12-02 16:55:27,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 16:55:27,067 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2023-12-02 16:55:27,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 16:55:27,067 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:55:27,067 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2023-12-02 16:55:27,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 16:55:27,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:55:27,268 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:55:27,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:55:27,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1465758403, now seen corresponding path program 3 times [2023-12-02 16:55:27,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:55:27,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731198443] [2023-12-02 16:55:27,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:55:27,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:55:27,280 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:55:27,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1127187041] [2023-12-02 16:55:27,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 16:55:27,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:55:27,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:55:27,281 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:55:27,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 16:55:27,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 16:55:27,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:55:27,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-02 16:55:27,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:55:27,769 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 16:55:27,769 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:57:01,679 WARN L293 SmtUtils]: Spent 23.43s on a formula simplification. DAG size of input: 110 DAG size of output: 93 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:57:48,697 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse13 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (let ((.cse19 (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296)) (.cse12 (+ .cse13 1))) (or (let ((.cse10 (div .cse19 2))) (let ((.cse11 (mod .cse10 4294967296)) (.cse2 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296))) (let ((.cse5 (+ .cse2 1)) (.cse7 (* (- 1) .cse2)) (.cse9 (div .cse11 2)) (.cse3 (* 4294967295 |c_ULTIMATE.start_main_~A~0#1|))) (and (or (let ((.cse0 (mod (* .cse10 |c_ULTIMATE.start_main_~q~0#1|) 2147483648)) (.cse8 (mod (* .cse9 |c_ULTIMATE.start_main_~q~0#1|) 1073741824))) (let ((.cse4 (* .cse8 4)) (.cse1 (* (- 2) .cse0)) (.cse6 (not (= (mod (+ (* 4294967295 |c_ULTIMATE.start_main_~r~0#1|) |c_ULTIMATE.start_main_~A~0#1| (* .cse0 4294967294)) 4294967296) 0)))) (and (or (< (+ (* .cse0 2) (* 4294967296 (div (+ .cse1 .cse2 (mod (+ .cse3 4294967295 .cse4) 4294967296)) 4294967296))) .cse5) .cse6) (or (< (+ 2147483647 (* (div (+ (- 1) .cse7 .cse4) 4294967296) 2147483648) .cse0 (* (div (+ .cse1 .cse2) 4294967296) 2147483648)) (* 2 .cse8)) .cse6)))) (< .cse11 .cse12)) (or (< .cse13 .cse11) (let ((.cse18 (* 2 .cse10 |c_ULTIMATE.start_main_~q~0#1|))) (let ((.cse17 (mod (+ .cse18 .cse10) 4294967296))) (let ((.cse14 (not (= (mod (+ .cse3 |c_ULTIMATE.start_main_~r~0#1| .cse18) 4294967296) 0))) (.cse16 (* (- 1) .cse17)) (.cse15 (* 2 (mod (+ .cse9 (* .cse9 2 |c_ULTIMATE.start_main_~q~0#1|)) 2147483648)))) (and (or .cse14 (< (+ (* (div (+ (mod (+ .cse3 4294967295 .cse15) 4294967296) .cse2 .cse16) 4294967296) 4294967296) .cse17) .cse5)) (or .cse14 (< (+ (* (div (+ .cse2 .cse16) 4294967296) 4294967296) .cse17 4294967295 (* (div (+ (- 1) .cse7 .cse15) 4294967296) 4294967296)) .cse15))))))))))) (< .cse19 .cse12)))) is different from true [2023-12-02 16:58:23,738 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse8 (mod |c_ULTIMATE.start_main_~b~0#1| 2147483648)) (.cse9 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (or (let ((.cse6 (* 2 .cse8 |c_ULTIMATE.start_main_~q~0#1|))) (let ((.cse2 (* 4294967295 |c_ULTIMATE.start_main_~A~0#1|)) (.cse4 (mod (+ .cse6 .cse8) 4294967296))) (let ((.cse0 (* (- 1) .cse4)) (.cse1 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse3 (* (mod (let ((.cse7 (div .cse8 2))) (+ (* 2 .cse7 |c_ULTIMATE.start_main_~q~0#1|) .cse7)) 2147483648) 2)) (.cse5 (not (= (mod (+ .cse2 |c_ULTIMATE.start_main_~r~0#1| .cse6) 4294967296) 0)))) (and (or (< (+ (* 4294967296 (div (+ .cse0 .cse1 (mod (+ .cse2 4294967295 .cse3) 4294967296)) 4294967296)) .cse4) (+ .cse1 1)) .cse5) (or (< (+ .cse4 4294967295 (* (div (+ (- 1) (* (- 1) .cse1) .cse3) 4294967296) 4294967296) (* (div (+ .cse0 .cse1) 4294967296) 4294967296)) .cse3) .cse5))))) (< .cse9 (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296)) (< (* 2 .cse8) (+ .cse9 1)))) is different from true [2023-12-02 16:58:33,044 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2023-12-02 16:58:33,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:58:33,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731198443] [2023-12-02 16:58:33,044 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:58:33,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127187041] [2023-12-02 16:58:33,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127187041] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:58:33,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1401664474] [2023-12-02 16:58:33,046 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-12-02 16:58:33,046 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:58:33,046 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:58:33,046 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:58:33,046 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:58:33,600 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 24 for LOIs [2023-12-02 16:58:33,615 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:58:44,609 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1418#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_42| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_43| Int) (|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_43| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_43| Int)) (not (= (mod (+ (* |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_43| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_42|) |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_43|) 4294967296) (mod |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_43| 4294967296)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 16:58:44,610 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:58:44,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 16:58:44,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2023-12-02 16:58:44,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181149340] [2023-12-02 16:58:44,610 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 16:58:44,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 16:58:44,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:58:44,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 16:58:44,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=599, Unknown=5, NotChecked=102, Total=812 [2023-12-02 16:58:44,612 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 18 states have internal predecessors, (40), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 16:58:46,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 16:58:51,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 16:58:54,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 16:58:55,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 16:58:58,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 16:59:00,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 16:59:47,397 WARN L293 SmtUtils]: Spent 25.59s on a formula simplification that was a NOOP. DAG size: 97 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:59:48,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 16:59:49,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 16:59:53,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 16:59:55,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 16:59:55,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:59:55,915 INFO L93 Difference]: Finished difference Result 86 states and 104 transitions. [2023-12-02 16:59:55,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 16:59:55,916 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 18 states have internal predecessors, (40), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 28 [2023-12-02 16:59:55,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:59:55,917 INFO L225 Difference]: With dead ends: 86 [2023-12-02 16:59:55,917 INFO L226 Difference]: Without dead ends: 56 [2023-12-02 16:59:55,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 95.8s TimeCoverageRelationStatistics Valid=142, Invalid=790, Unknown=6, NotChecked=118, Total=1056 [2023-12-02 16:59:55,918 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 25 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 13 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 22.9s IncrementalHoareTripleChecker+Time [2023-12-02 16:59:55,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 127 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 170 Invalid, 7 Unknown, 110 Unchecked, 22.9s Time] [2023-12-02 16:59:55,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-12-02 16:59:55,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2023-12-02 16:59:55,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 40 states have (on average 1.05) internal successors, (42), 42 states have internal predecessors, (42), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 16:59:55,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2023-12-02 16:59:55,938 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 28 [2023-12-02 16:59:55,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:59:55,938 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2023-12-02 16:59:55,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 18 states have internal predecessors, (40), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 16:59:55,938 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2023-12-02 16:59:55,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-02 16:59:55,939 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:59:55,939 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2023-12-02 16:59:55,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-02 16:59:56,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:59:56,140 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:59:56,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:59:56,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1838953197, now seen corresponding path program 4 times [2023-12-02 16:59:56,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:59:56,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102212844] [2023-12-02 16:59:56,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:59:56,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:59:56,150 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 16:59:56,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [839797813] [2023-12-02 16:59:56,151 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 16:59:56,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:59:56,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:59:56,152 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:59:56,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 16:59:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:59:56,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 16:59:56,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:59:56,351 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 16:59:56,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:59:56,924 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 16:59:56,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:59:56,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102212844] [2023-12-02 16:59:56,925 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 16:59:56,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839797813] [2023-12-02 16:59:56,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839797813] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:59:56,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1794497291] [2023-12-02 16:59:56,926 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-12-02 16:59:56,926 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:59:56,926 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:59:56,927 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:59:56,927 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:59:57,245 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 24 for LOIs [2023-12-02 16:59:57,259 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:00:00,550 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1854#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_51| Int) (|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_58| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_52| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_52| Int)) (not (= (mod (+ |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_52| (* |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_58| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_51|)) 4294967296) (mod |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_52| 4294967296)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 17:00:00,550 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:00:00,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:00:00,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 11 [2023-12-02 17:00:00,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548384940] [2023-12-02 17:00:00,551 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:00:00,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 17:00:00,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:00:00,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 17:00:00,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-12-02 17:00:00,552 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 17:00:00,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:00:00,630 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2023-12-02 17:00:00,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:00:00,630 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 33 [2023-12-02 17:00:00,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:00:00,631 INFO L225 Difference]: With dead ends: 65 [2023-12-02 17:00:00,631 INFO L226 Difference]: Without dead ends: 47 [2023-12-02 17:00:00,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-12-02 17:00:00,632 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:00:00,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:00:00,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-12-02 17:00:00,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-12-02 17:00:00,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 36 states have internal predecessors, (36), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 17:00:00,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2023-12-02 17:00:00,654 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 33 [2023-12-02 17:00:00,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:00:00,655 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2023-12-02 17:00:00,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 17:00:00,655 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2023-12-02 17:00:00,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-02 17:00:00,656 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:00:00,656 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1] [2023-12-02 17:00:00,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 17:00:00,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:00,857 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:00:00,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:00:00,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1878306717, now seen corresponding path program 5 times [2023-12-02 17:00:00,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:00:00,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008721112] [2023-12-02 17:00:00,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:00:00,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:00:00,868 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:00:00,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343841412] [2023-12-02 17:00:00,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:00:00,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:00:00,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:00:00,869 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:00:00,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d0969fe-4361-4615-bc09-455db766256f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process