./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/nested_1-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a132fe53-9cdb-416e-b156-fa27203b2e5f/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a132fe53-9cdb-416e-b156-fa27203b2e5f/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_a132fe53-9cdb-416e-b156-fa27203b2e5f/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a132fe53-9cdb-416e-b156-fa27203b2e5f/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/nested_1-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a132fe53-9cdb-416e-b156-fa27203b2e5f/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_a132fe53-9cdb-416e-b156-fa27203b2e5f/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 7d46306d0f449fc697e3921b4f35c60335f25019c8462cefcaf92538159e3d14 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 18:23:18,372 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 18:23:18,439 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a132fe53-9cdb-416e-b156-fa27203b2e5f/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 18:23:18,444 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 18:23:18,444 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 18:23:18,468 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 18:23:18,469 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 18:23:18,469 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 18:23:18,470 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 18:23:18,471 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 18:23:18,471 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 18:23:18,472 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 18:23:18,472 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 18:23:18,473 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 18:23:18,473 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 18:23:18,474 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 18:23:18,474 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 18:23:18,475 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 18:23:18,475 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 18:23:18,476 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 18:23:18,476 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 18:23:18,477 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 18:23:18,477 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 18:23:18,478 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 18:23:18,478 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 18:23:18,479 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 18:23:18,479 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 18:23:18,479 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 18:23:18,480 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 18:23:18,480 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 18:23:18,480 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 18:23:18,481 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 18:23:18,481 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 18:23:18,481 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 18:23:18,482 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 18:23:18,482 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 18:23:18,482 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 18:23:18,482 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:23:18,482 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 18:23:18,483 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 18:23:18,483 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 18:23:18,483 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 18:23:18,483 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 18:23:18,483 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 18:23:18,484 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 18:23:18,484 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 18:23:18,484 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 18:23:18,484 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_a132fe53-9cdb-416e-b156-fa27203b2e5f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a132fe53-9cdb-416e-b156-fa27203b2e5f/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7d46306d0f449fc697e3921b4f35c60335f25019c8462cefcaf92538159e3d14 [2023-12-02 18:23:18,709 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 18:23:18,731 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 18:23:18,734 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 18:23:18,735 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 18:23:18,736 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 18:23:18,737 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a132fe53-9cdb-416e-b156-fa27203b2e5f/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/loop-acceleration/nested_1-1.c [2023-12-02 18:23:21,452 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 18:23:21,623 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 18:23:21,623 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a132fe53-9cdb-416e-b156-fa27203b2e5f/sv-benchmarks/c/loop-acceleration/nested_1-1.c [2023-12-02 18:23:21,631 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a132fe53-9cdb-416e-b156-fa27203b2e5f/bin/utaipan-verify-nQ1chXbOIh/data/0b1a63fb0/92311e2bd4df43c09d4fb3c18ec0be62/FLAG567502823 [2023-12-02 18:23:21,645 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a132fe53-9cdb-416e-b156-fa27203b2e5f/bin/utaipan-verify-nQ1chXbOIh/data/0b1a63fb0/92311e2bd4df43c09d4fb3c18ec0be62 [2023-12-02 18:23:21,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 18:23:21,649 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 18:23:21,650 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 18:23:21,651 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 18:23:21,656 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 18:23:21,657 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:23:21" (1/1) ... [2023-12-02 18:23:21,658 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61487140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:23:21, skipping insertion in model container [2023-12-02 18:23:21,658 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:23:21" (1/1) ... [2023-12-02 18:23:21,678 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 18:23:21,824 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_a132fe53-9cdb-416e-b156-fa27203b2e5f/sv-benchmarks/c/loop-acceleration/nested_1-1.c[322,335] [2023-12-02 18:23:21,836 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:23:21,845 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 18:23:21,857 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_a132fe53-9cdb-416e-b156-fa27203b2e5f/sv-benchmarks/c/loop-acceleration/nested_1-1.c[322,335] [2023-12-02 18:23:21,860 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:23:21,874 INFO L206 MainTranslator]: Completed translation [2023-12-02 18:23:21,874 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:23:21 WrapperNode [2023-12-02 18:23:21,875 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 18:23:21,876 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 18:23:21,876 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 18:23:21,876 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 18:23:21,883 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:23:21" (1/1) ... [2023-12-02 18:23:21,889 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:23:21" (1/1) ... [2023-12-02 18:23:21,906 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 33 [2023-12-02 18:23:21,906 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 18:23:21,907 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 18:23:21,907 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 18:23:21,908 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 18:23:21,916 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:23:21" (1/1) ... [2023-12-02 18:23:21,916 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:23:21" (1/1) ... [2023-12-02 18:23:21,917 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:23:21" (1/1) ... [2023-12-02 18:23:21,918 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:23:21" (1/1) ... [2023-12-02 18:23:21,920 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:23:21" (1/1) ... [2023-12-02 18:23:21,923 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:23:21" (1/1) ... [2023-12-02 18:23:21,924 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:23:21" (1/1) ... [2023-12-02 18:23:21,925 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:23:21" (1/1) ... [2023-12-02 18:23:21,926 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 18:23:21,927 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 18:23:21,927 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 18:23:21,927 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 18:23:21,928 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:23:21" (1/1) ... [2023-12-02 18:23:21,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:23:21,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a132fe53-9cdb-416e-b156-fa27203b2e5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:23:21,961 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a132fe53-9cdb-416e-b156-fa27203b2e5f/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 18:23:21,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a132fe53-9cdb-416e-b156-fa27203b2e5f/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 18:23:22,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 18:23:22,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 18:23:22,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 18:23:22,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 18:23:22,068 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 18:23:22,070 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 18:23:22,167 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 18:23:22,198 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 18:23:22,198 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 18:23:22,200 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:23:22 BoogieIcfgContainer [2023-12-02 18:23:22,200 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 18:23:22,203 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 18:23:22,203 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 18:23:22,206 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 18:23:22,207 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 06:23:21" (1/3) ... [2023-12-02 18:23:22,207 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@221faf62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:23:22, skipping insertion in model container [2023-12-02 18:23:22,208 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:23:21" (2/3) ... [2023-12-02 18:23:22,208 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@221faf62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:23:22, skipping insertion in model container [2023-12-02 18:23:22,208 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:23:22" (3/3) ... [2023-12-02 18:23:22,210 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_1-1.c [2023-12-02 18:23:22,229 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 18:23:22,229 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 18:23:22,271 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 18:23:22,278 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;@3a121a97, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 18:23:22,279 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 18:23:22,283 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:23:22,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 18:23:22,289 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:23:22,290 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 18:23:22,290 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:23:22,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:23:22,296 INFO L85 PathProgramCache]: Analyzing trace with hash 2252617, now seen corresponding path program 1 times [2023-12-02 18:23:22,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:23:22,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886558208] [2023-12-02 18:23:22,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:23:22,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:23:22,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:23:22,495 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 18:23:22,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:23:22,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886558208] [2023-12-02 18:23:22,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886558208] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:23:22,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:23:22,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 18:23:22,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139955706] [2023-12-02 18:23:22,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:23:22,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:23:22,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:23:22,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:23:22,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:23:22,536 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:23:22,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:23:22,567 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2023-12-02 18:23:22,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:23:22,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-12-02 18:23:22,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:23:22,577 INFO L225 Difference]: With dead ends: 15 [2023-12-02 18:23:22,577 INFO L226 Difference]: Without dead ends: 8 [2023-12-02 18:23:22,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:23:22,583 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:23:22,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 8 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:23:22,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2023-12-02 18:23:22,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2023-12-02 18:23:22,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:23:22,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2023-12-02 18:23:22,613 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 4 [2023-12-02 18:23:22,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:23:22,614 INFO L495 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2023-12-02 18:23:22,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:23:22,614 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2023-12-02 18:23:22,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 18:23:22,615 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:23:22,615 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 18:23:22,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 18:23:22,616 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:23:22,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:23:22,616 INFO L85 PathProgramCache]: Analyzing trace with hash 2130164165, now seen corresponding path program 1 times [2023-12-02 18:23:22,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:23:22,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551668480] [2023-12-02 18:23:22,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:23:22,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:23:22,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:23:22,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:23:22,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:23:22,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551668480] [2023-12-02 18:23:22,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551668480] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:23:22,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:23:22,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:23:22,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625977882] [2023-12-02 18:23:22,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:23:22,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:23:22,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:23:22,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:23:22,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:23:22,693 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:23:22,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:23:22,709 INFO L93 Difference]: Finished difference Result 13 states and 16 transitions. [2023-12-02 18:23:22,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:23:22,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-12-02 18:23:22,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:23:22,710 INFO L225 Difference]: With dead ends: 13 [2023-12-02 18:23:22,710 INFO L226 Difference]: Without dead ends: 8 [2023-12-02 18:23:22,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:23:22,712 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:23:22,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 5 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:23:22,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2023-12-02 18:23:22,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2023-12-02 18:23:22,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:23:22,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2023-12-02 18:23:22,717 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2023-12-02 18:23:22,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:23:22,717 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2023-12-02 18:23:22,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:23:22,718 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2023-12-02 18:23:22,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 18:23:22,718 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:23:22,718 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:23:22,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 18:23:22,719 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:23:22,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:23:22,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1585602295, now seen corresponding path program 1 times [2023-12-02 18:23:22,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:23:22,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558588078] [2023-12-02 18:23:22,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:23:22,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:23:22,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:23:22,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:23:22,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:23:22,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558588078] [2023-12-02 18:23:22,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558588078] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:23:22,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598278333] [2023-12-02 18:23:22,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:23:22,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:23:22,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a132fe53-9cdb-416e-b156-fa27203b2e5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:23:22,860 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a132fe53-9cdb-416e-b156-fa27203b2e5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:23:22,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a132fe53-9cdb-416e-b156-fa27203b2e5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 18:23:22,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:23:22,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 18:23:22,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:23:22,980 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 18:23:22,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:23:23,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 18:23:23,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598278333] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:23:23,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1299412801] [2023-12-02 18:23:23,040 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-12-02 18:23:23,040 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:23:23,043 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:23:23,048 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:23:23,048 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:23:23,521 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:23:23,616 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '122#(and (<= 1 |#StackHeapBarrier|) (<= 268435455 (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (mod |ULTIMATE.start_main_~x~0#1| 2) 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 18:23:23,616 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:23:23,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:23:23,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 9 [2023-12-02 18:23:23,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268754211] [2023-12-02 18:23:23,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:23:23,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 18:23:23,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:23:23,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 18:23:23,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-12-02 18:23:23,619 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:23:23,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:23:23,793 INFO L93 Difference]: Finished difference Result 27 states and 39 transitions. [2023-12-02 18:23:23,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 18:23:23,794 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 18:23:23,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:23:23,794 INFO L225 Difference]: With dead ends: 27 [2023-12-02 18:23:23,794 INFO L226 Difference]: Without dead ends: 21 [2023-12-02 18:23:23,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2023-12-02 18:23:23,797 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 20 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:23:23,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 10 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:23:23,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-02 18:23:23,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-12-02 18:23:23,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:23:23,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-12-02 18:23:23,804 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 7 [2023-12-02 18:23:23,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:23:23,805 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-12-02 18:23:23,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:23:23,805 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-12-02 18:23:23,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 18:23:23,806 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:23:23,806 INFO L195 NwaCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1] [2023-12-02 18:23:23,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a132fe53-9cdb-416e-b156-fa27203b2e5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 18:23:24,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a132fe53-9cdb-416e-b156-fa27203b2e5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:23:24,007 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:23:24,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:23:24,007 INFO L85 PathProgramCache]: Analyzing trace with hash -140644807, now seen corresponding path program 2 times [2023-12-02 18:23:24,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:23:24,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257610166] [2023-12-02 18:23:24,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:23:24,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:23:24,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:23:24,134 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 18:23:24,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:23:24,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257610166] [2023-12-02 18:23:24,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257610166] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:23:24,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427845711] [2023-12-02 18:23:24,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 18:23:24,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:23:24,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a132fe53-9cdb-416e-b156-fa27203b2e5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:23:24,136 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a132fe53-9cdb-416e-b156-fa27203b2e5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:23:24,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a132fe53-9cdb-416e-b156-fa27203b2e5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 18:23:24,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 18:23:24,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:23:24,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:23:24,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:23:24,218 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 18:23:24,218 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:23:24,255 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 18:23:24,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427845711] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:23:24,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1268162395] [2023-12-02 18:23:24,258 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-12-02 18:23:24,258 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:23:24,258 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:23:24,259 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:23:24,259 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:23:24,535 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:23:24,624 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '349#(and (<= 1 |#StackHeapBarrier|) (<= 268435455 (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (mod |ULTIMATE.start_main_~x~0#1| 2) 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 18:23:24,624 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:23:24,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:23:24,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-12-02 18:23:24,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989329097] [2023-12-02 18:23:24,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:23:24,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 18:23:24,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:23:24,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 18:23:24,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-12-02 18:23:24,627 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:23:24,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:23:24,722 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2023-12-02 18:23:24,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 18:23:24,723 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-12-02 18:23:24,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:23:24,723 INFO L225 Difference]: With dead ends: 53 [2023-12-02 18:23:24,723 INFO L226 Difference]: Without dead ends: 37 [2023-12-02 18:23:24,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2023-12-02 18:23:24,725 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:23:24,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:23:24,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-12-02 18:23:24,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-12-02 18:23:24,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:23:24,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2023-12-02 18:23:24,737 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 20 [2023-12-02 18:23:24,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:23:24,737 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2023-12-02 18:23:24,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:23:24,737 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2023-12-02 18:23:24,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-02 18:23:24,738 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:23:24,738 INFO L195 NwaCegarLoop]: trace histogram [24, 4, 4, 1, 1, 1, 1] [2023-12-02 18:23:24,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a132fe53-9cdb-416e-b156-fa27203b2e5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 18:23:24,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a132fe53-9cdb-416e-b156-fa27203b2e5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:23:24,939 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:23:24,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:23:24,940 INFO L85 PathProgramCache]: Analyzing trace with hash 500624441, now seen corresponding path program 3 times [2023-12-02 18:23:24,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:23:24,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244760453] [2023-12-02 18:23:24,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:23:24,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:23:24,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:23:25,141 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 151 proven. 21 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2023-12-02 18:23:25,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:23:25,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244760453] [2023-12-02 18:23:25,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244760453] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:23:25,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421794306] [2023-12-02 18:23:25,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 18:23:25,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:23:25,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a132fe53-9cdb-416e-b156-fa27203b2e5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:23:25,143 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a132fe53-9cdb-416e-b156-fa27203b2e5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:23:25,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a132fe53-9cdb-416e-b156-fa27203b2e5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 18:23:25,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 18:23:25,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:23:25,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 18:23:25,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:23:25,401 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-12-02 18:23:25,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:23:25,808 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 10 proven. 314 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-12-02 18:23:25,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421794306] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:23:25,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [898912661] [2023-12-02 18:23:25,811 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-12-02 18:23:25,811 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:23:25,811 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:23:25,811 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:23:25,812 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:23:26,070 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:23:26,248 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '764#(and (<= 1 |#StackHeapBarrier|) (<= 268435455 (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (mod |ULTIMATE.start_main_~x~0#1| 2) 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 18:23:26,248 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:23:26,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:23:26,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 29 [2023-12-02 18:23:26,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827309238] [2023-12-02 18:23:26,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:23:26,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-02 18:23:26,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:23:26,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-02 18:23:26,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=802, Unknown=0, NotChecked=0, Total=992 [2023-12-02 18:23:26,251 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:23:34,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:23:34,454 INFO L93 Difference]: Finished difference Result 135 states and 176 transitions. [2023-12-02 18:23:34,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2023-12-02 18:23:34,455 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-12-02 18:23:34,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:23:34,457 INFO L225 Difference]: With dead ends: 135 [2023-12-02 18:23:34,457 INFO L226 Difference]: Without dead ends: 107 [2023-12-02 18:23:34,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5253 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=2638, Invalid=11168, Unknown=0, NotChecked=0, Total=13806 [2023-12-02 18:23:34,465 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 73 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 18:23:34,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 24 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 18:23:34,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-12-02 18:23:34,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2023-12-02 18:23:34,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.2169811320754718) internal successors, (129), 106 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:23:34,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 129 transitions. [2023-12-02 18:23:34,495 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 129 transitions. Word has length 36 [2023-12-02 18:23:34,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:23:34,495 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 129 transitions. [2023-12-02 18:23:34,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:23:34,496 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 129 transitions. [2023-12-02 18:23:34,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-12-02 18:23:34,499 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:23:34,499 INFO L195 NwaCegarLoop]: trace histogram [70, 10, 10, 1, 1, 1, 1] [2023-12-02 18:23:34,505 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a132fe53-9cdb-416e-b156-fa27203b2e5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 18:23:34,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a132fe53-9cdb-416e-b156-fa27203b2e5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:23:34,705 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:23:34,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:23:34,705 INFO L85 PathProgramCache]: Analyzing trace with hash 198990345, now seen corresponding path program 4 times [2023-12-02 18:23:34,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:23:34,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758810431] [2023-12-02 18:23:34,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:23:34,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:23:34,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:23:35,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3215 backedges. 586 proven. 28 refuted. 0 times theorem prover too weak. 2601 trivial. 0 not checked. [2023-12-02 18:23:35,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:23:35,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758810431] [2023-12-02 18:23:35,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758810431] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:23:35,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115049829] [2023-12-02 18:23:35,072 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 18:23:35,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:23:35,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a132fe53-9cdb-416e-b156-fa27203b2e5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:23:35,073 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a132fe53-9cdb-416e-b156-fa27203b2e5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:23:35,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a132fe53-9cdb-416e-b156-fa27203b2e5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 18:23:35,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:23:35,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 18:23:35,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:23:35,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3215 backedges. 586 proven. 28 refuted. 0 times theorem prover too weak. 2601 trivial. 0 not checked. [2023-12-02 18:23:35,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:23:35,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3215 backedges. 586 proven. 28 refuted. 0 times theorem prover too weak. 2601 trivial. 0 not checked. [2023-12-02 18:23:35,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115049829] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:23:35,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2012535270] [2023-12-02 18:23:35,335 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-12-02 18:23:35,335 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:23:35,335 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:23:35,336 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:23:35,336 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:23:35,529 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:23:35,627 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1989#(and (<= 1 |#StackHeapBarrier|) (<= 268435455 (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (mod |ULTIMATE.start_main_~x~0#1| 2) 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 18:23:35,628 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:23:35,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:23:35,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2023-12-02 18:23:35,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430216393] [2023-12-02 18:23:35,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:23:35,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 18:23:35,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:23:35,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 18:23:35,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2023-12-02 18:23:35,630 INFO L87 Difference]: Start difference. First operand 107 states and 129 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:23:35,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:23:35,727 INFO L93 Difference]: Finished difference Result 222 states and 283 transitions. [2023-12-02 18:23:35,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 18:23:35,727 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2023-12-02 18:23:35,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:23:35,729 INFO L225 Difference]: With dead ends: 222 [2023-12-02 18:23:35,729 INFO L226 Difference]: Without dead ends: 125 [2023-12-02 18:23:35,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2023-12-02 18:23:35,731 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:23:35,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:23:35,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-12-02 18:23:35,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2023-12-02 18:23:35,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0887096774193548) internal successors, (135), 124 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:23:35,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 135 transitions. [2023-12-02 18:23:35,761 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 135 transitions. Word has length 94 [2023-12-02 18:23:35,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:23:35,762 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 135 transitions. [2023-12-02 18:23:35,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:23:35,762 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 135 transitions. [2023-12-02 18:23:35,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-12-02 18:23:35,764 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:23:35,764 INFO L195 NwaCegarLoop]: trace histogram [100, 10, 10, 1, 1, 1, 1] [2023-12-02 18:23:35,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a132fe53-9cdb-416e-b156-fa27203b2e5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-02 18:23:35,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a132fe53-9cdb-416e-b156-fa27203b2e5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:23:35,965 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:23:35,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:23:35,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1113288353, now seen corresponding path program 5 times [2023-12-02 18:23:35,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:23:35,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742553822] [2023-12-02 18:23:35,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:23:35,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:23:36,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:23:36,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 0 proven. 5500 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2023-12-02 18:23:36,428 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:23:36,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742553822] [2023-12-02 18:23:36,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742553822] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:23:36,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804409059] [2023-12-02 18:23:36,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 18:23:36,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:23:36,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a132fe53-9cdb-416e-b156-fa27203b2e5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:23:36,430 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a132fe53-9cdb-416e-b156-fa27203b2e5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:23:36,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a132fe53-9cdb-416e-b156-fa27203b2e5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 18:23:36,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-12-02 18:23:36,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:23:36,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 18:23:36,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:23:36,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 1099 proven. 0 refuted. 0 times theorem prover too weak. 4951 trivial. 0 not checked. [2023-12-02 18:23:36,930 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:23:36,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804409059] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:23:36,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:23:36,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 16 [2023-12-02 18:23:36,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361983129] [2023-12-02 18:23:36,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:23:36,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:23:36,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:23:36,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:23:36,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-12-02 18:23:36,932 INFO L87 Difference]: Start difference. First operand 125 states and 135 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:23:37,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:23:37,059 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2023-12-02 18:23:37,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:23:37,059 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2023-12-02 18:23:37,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:23:37,060 INFO L225 Difference]: With dead ends: 125 [2023-12-02 18:23:37,061 INFO L226 Difference]: Without dead ends: 0 [2023-12-02 18:23:37,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-12-02 18:23:37,062 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:23:37,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 5 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:23:37,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-02 18:23:37,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-02 18:23:37,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:23:37,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-02 18:23:37,064 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 124 [2023-12-02 18:23:37,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:23:37,064 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-02 18:23:37,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:23:37,064 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-02 18:23:37,065 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-02 18:23:37,067 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-02 18:23:37,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a132fe53-9cdb-416e-b156-fa27203b2e5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 18:23:37,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a132fe53-9cdb-416e-b156-fa27203b2e5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:23:37,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-02 18:23:39,744 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-12-02 18:23:39,744 INFO L895 garLoopResultBuilder]: At program point L19-2(lines 19 21) the Hoare annotation is: (let ((.cse2 (mod (+ |ULTIMATE.start_main_~y~0#1| 1) 4294967296)) (.cse3 (< (mod (+ |ULTIMATE.start_main_~x~0#1| 4) 4294967296) 268435455)) (.cse0 (<= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 268435454)) (.cse1 (<= (mod (+ 4294967295 |ULTIMATE.start_main_~x~0#1|) 4294967296) 268435454))) (or (and .cse0 .cse1 (= 2 |ULTIMATE.start_main_~y~0#1|)) (and (= 5 |ULTIMATE.start_main_~y~0#1|) .cse0 .cse1) (and (= |ULTIMATE.start_main_~y~0#1| 4) .cse0 .cse1) (and .cse0 .cse1 (< 9 .cse2) (or (< 9 (mod (+ |ULTIMATE.start_main_~y~0#1| 4) 4294967296)) .cse3)) (and (= 6 |ULTIMATE.start_main_~y~0#1|) .cse0 .cse1) (and .cse0 .cse1 (= |ULTIMATE.start_main_~y~0#1| 0)) (and .cse0 .cse1 (<= .cse2 9) (or (< 9 (mod (+ 2 |ULTIMATE.start_main_~y~0#1|) 4294967296)) .cse3)) (and .cse0 .cse1 (= 3 |ULTIMATE.start_main_~y~0#1|)) (and .cse0 (= 7 |ULTIMATE.start_main_~y~0#1|) .cse1) (= |ULTIMATE.start_main_~x~0#1| 0) (and .cse0 .cse1 (= |ULTIMATE.start_main_~y~0#1| 1)))) [2023-12-02 18:23:39,744 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-12-02 18:23:39,744 INFO L899 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2023-12-02 18:23:39,744 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2023-12-02 18:23:39,745 INFO L895 garLoopResultBuilder]: At program point L16-2(lines 16 24) the Hoare annotation is: (or (and (= |ULTIMATE.start_main_~y~0#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0)) (and (<= (mod (+ 4294967295 |ULTIMATE.start_main_~x~0#1|) 4294967296) 268435454) (or (< (mod (+ |ULTIMATE.start_main_~x~0#1| 4) 4294967296) 268435455) (< 9 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))))) [2023-12-02 18:23:39,745 INFO L899 garLoopResultBuilder]: For program point L6(lines 6 8) no Hoare annotation was computed. [2023-12-02 18:23:39,745 INFO L899 garLoopResultBuilder]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2023-12-02 18:23:39,747 INFO L445 BasicCegarLoop]: Path program histogram: [5, 1, 1] [2023-12-02 18:23:39,749 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 18:23:39,762 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 06:23:39 BoogieIcfgContainer [2023-12-02 18:23:39,762 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 18:23:39,763 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 18:23:39,763 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 18:23:39,763 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 18:23:39,764 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:23:22" (3/4) ... [2023-12-02 18:23:39,765 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-12-02 18:23:39,772 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2023-12-02 18:23:39,772 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2023-12-02 18:23:39,772 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-12-02 18:23:39,772 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-12-02 18:23:39,860 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a132fe53-9cdb-416e-b156-fa27203b2e5f/bin/utaipan-verify-nQ1chXbOIh/witness.graphml [2023-12-02 18:23:39,860 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a132fe53-9cdb-416e-b156-fa27203b2e5f/bin/utaipan-verify-nQ1chXbOIh/witness.yml [2023-12-02 18:23:39,861 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 18:23:39,861 INFO L158 Benchmark]: Toolchain (without parser) took 18212.31ms. Allocated memory was 159.4MB in the beginning and 218.1MB in the end (delta: 58.7MB). Free memory was 113.0MB in the beginning and 174.9MB in the end (delta: -61.8MB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 18:23:39,862 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 159.4MB. Free memory was 129.9MB in the beginning and 129.7MB in the end (delta: 160.8kB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 18:23:39,862 INFO L158 Benchmark]: CACSL2BoogieTranslator took 224.53ms. Allocated memory is still 159.4MB. Free memory was 112.5MB in the beginning and 102.4MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-12-02 18:23:39,862 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.93ms. Allocated memory is still 159.4MB. Free memory was 102.4MB in the beginning and 101.3MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 18:23:39,863 INFO L158 Benchmark]: Boogie Preprocessor took 19.04ms. Allocated memory is still 159.4MB. Free memory was 101.0MB in the beginning and 99.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 18:23:39,863 INFO L158 Benchmark]: RCFGBuilder took 272.73ms. Allocated memory is still 159.4MB. Free memory was 99.8MB in the beginning and 89.4MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-12-02 18:23:39,864 INFO L158 Benchmark]: TraceAbstraction took 17559.34ms. Allocated memory was 159.4MB in the beginning and 218.1MB in the end (delta: 58.7MB). Free memory was 88.8MB in the beginning and 179.0MB in the end (delta: -90.2MB). Peak memory consumption was 93.0MB. Max. memory is 16.1GB. [2023-12-02 18:23:39,864 INFO L158 Benchmark]: Witness Printer took 97.92ms. Allocated memory is still 218.1MB. Free memory was 179.0MB in the beginning and 174.9MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-12-02 18:23:39,866 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 159.4MB. Free memory was 129.9MB in the beginning and 129.7MB in the end (delta: 160.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 224.53ms. Allocated memory is still 159.4MB. Free memory was 112.5MB in the beginning and 102.4MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.93ms. Allocated memory is still 159.4MB. Free memory was 102.4MB in the beginning and 101.3MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 19.04ms. Allocated memory is still 159.4MB. Free memory was 101.0MB in the beginning and 99.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 272.73ms. Allocated memory is still 159.4MB. Free memory was 99.8MB in the beginning and 89.4MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 17559.34ms. Allocated memory was 159.4MB in the beginning and 218.1MB in the end (delta: 58.7MB). Free memory was 88.8MB in the beginning and 179.0MB in the end (delta: -90.2MB). Peak memory consumption was 93.0MB. Max. memory is 16.1GB. * Witness Printer took 97.92ms. Allocated memory is still 218.1MB. Free memory was 179.0MB in the beginning and 174.9MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 7]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 8 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 17.5s, OverallIterations: 7, TraceHistogramMax: 100, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 8.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 98 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 98 mSDsluCounter, 86 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 67 mSDsCounter, 43 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 824 IncrementalHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 43 mSolverCounterUnsat, 19 mSDtfsCounter, 824 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 730 GetRequests, 545 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5431 ImplicationChecksByTransitivity, 9.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=125occurred in iteration=6, InterpolantAutomatonStates: 145, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 123 NumberOfFragments, 231 HoareAnnotationTreeSize, 2 FomulaSimplifications, 2069 FormulaSimplificationTreeSizeReduction, 0.9s HoareSimplificationTime, 2 FomulaSimplificationsInter, 1551 FormulaSimplificationTreeSizeReductionInter, 1.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 572 NumberOfCodeBlocks, 468 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 713 ConstructedInterpolants, 1 QuantifiedInterpolants, 1549 SizeOfPredicates, 4 NumberOfNonLiveVariables, 636 ConjunctsInSsa, 65 ConjunctsInUnsatCore, 16 InterpolantComputations, 3 PerfectInterpolantSequences, 16888/23144 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: ((((((((((((((x % 4294967296) <= 268435454) && (((4294967295 + x) % 4294967296) <= 268435454)) && (2 == y)) || (((5 == y) && ((x % 4294967296) <= 268435454)) && (((4294967295 + x) % 4294967296) <= 268435454))) || (((y == 4) && ((x % 4294967296) <= 268435454)) && (((4294967295 + x) % 4294967296) <= 268435454))) || (((((x % 4294967296) <= 268435454) && (((4294967295 + x) % 4294967296) <= 268435454)) && (9 < ((y + 1) % 4294967296))) && ((9 < ((y + 4) % 4294967296)) || (((x + 4) % 4294967296) < 268435455)))) || (((6 == y) && ((x % 4294967296) <= 268435454)) && (((4294967295 + x) % 4294967296) <= 268435454))) || ((((x % 4294967296) <= 268435454) && (((4294967295 + x) % 4294967296) <= 268435454)) && (y == 0))) || (((((x % 4294967296) <= 268435454) && (((4294967295 + x) % 4294967296) <= 268435454)) && (((y + 1) % 4294967296) <= 9)) && ((9 < ((2 + y) % 4294967296)) || (((x + 4) % 4294967296) < 268435455)))) || ((((x % 4294967296) <= 268435454) && (((4294967295 + x) % 4294967296) <= 268435454)) && (3 == y))) || ((((x % 4294967296) <= 268435454) && (7 == y)) && (((4294967295 + x) % 4294967296) <= 268435454))) || (x == 0)) || ((((x % 4294967296) <= 268435454) && (((4294967295 + x) % 4294967296) <= 268435454)) && (y == 1))) - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: (((y == 0) && (x == 0)) || ((((4294967295 + x) % 4294967296) <= 268435454) && ((((x + 4) % 4294967296) < 268435455) || (9 < (y % 4294967296))))) RESULT: Ultimate proved your program to be correct! [2023-12-02 18:23:39,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a132fe53-9cdb-416e-b156-fa27203b2e5f/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE